Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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This is a division of co-pending Canadian Application 222,713 filed
on 20th March 1975 (No. Patent 1,025,429)
This invention relates to winch-hoists, and especially to portable
winch-hoists, and particularly to a handle apparatus for use therewith.
One known winch-hoist is disclosed in United States Patent No.
2,633,328, which issued on March 31, 1953. That hoist has a number of com-
mercially proven advantages, particularly in the construction of, and mode
of cooperation between, the ratchet and the pawls. However, it has developed
that further significant improvements can be made. For example, in apparatus
common in the prior art, it has been necessary to secure the cable to the
drum by the use of a slug of metal swaged to an end of the cable and secured
to the drum in a recess provided in the drum surface. In such prior ap-
paratus, when the cable required replacement, it has been necessary to cut
the cable and in some cases to resort to the use of special swaging tools.
Complications involved in this procedure have made it difficult to make cable
replacements in the field. Usually it has been easier to return the hoist to
a factory facility for replacement.
In addition, to protect user, hoist and load, it has been common
to design the manually operable handle, which drives the pawl lever, in su~h
a way as to permit bending of the handle when it was subjected to torque in
excess of a predetermined limit. Such bending usually rendered the handle
unuseablev A further disadvantage was that there has been very limited free-
dom for variably associating the handle with the lever,;or no freedom (in the
case of integral lever and handle), frequently resulting in having to operate
the winch at a short effective lever arm, when the winch was used in tightly
confined positions, and/or making it impossible to have a working stroke in
the most advantageous direction.
The invention provides for a winch-hoist, handle apparatus for use
in driving a pawl-actuating lever of such winch-hoist, comprising a pair of
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telescopically-arranged tubes, means for frictionally securing said tubes
in selected positions of telescopic adjustment, and a member for linking said
handle apparatus with such a lever, and comprising: a rod having, toward one
end thereof, a pair of land areas; a first annular zone interposed between
said ]and areas and being of a cross section reduced with respect to the
cross section of said land areas; a second annular zone of reduced cross
section lying to one side of one of said land areas, extending toward the
opposite end of said rod, and having a portion projecting within one of said
tubes; and means for releasably securing said rod portion within said one
tube in a position such that another portion of said second annular zone
extends a predetermined distance beyond the end of said one tube.
Preferably the material of which the linking member or rod is made
and the cross-section of the second annular zone are such that the rod is bent
when an excessive force is applied to the handle. Thus, the rod constitutes
a bendable safety link which protects user, load and handle assembly, in the
event of serious overloading. Should overloading be encountered, it is only
necessary to replace the relatively inexpensive safety link, rather than a
complete handle assembly.
The winch-hoist apparatus disclosed also provides a handle which
is not only unique and improved per se, but also is cooperable with the hoist
at any of four (or more, if desired) angularly related positions, thereby
permitting optimization of the operating position and of the "pull angle"
without a reduction in leverage; thus avoiding the need for excess effort
by the operator.
The construction is such as to make it very easy to shift the oper-
ating position of the handle on the lever, and also very simple to remove and
replace the bendable link. It is also a preferred feature that the handle
apparatus incorporates storage space for spare safety links.
In the accompanying drawings:
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Figure 1 is a side elevational view of a portable winch-hoist
embodying the prese~t inv~ntion, illustrating the hoist in one condition of
rigging, and showing the operating handle in several positions-
Figure 2 is an elevational view looking in the direction of theline 2--2 applied to Figure l;
Figure 3 is a view taken as indicated by the line 3--3 of Figure l;
Figure 4 is a perspective view of a securing device, known E~_ se,
conveniently used in a novel manner in the sub-assembly shown in Figure 3;
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Figure 5 is an elevational view illustrating, on a larger scale,
the apparatus shown in Figure 1, as it would appear when vicwed from the left
of Figure l;
Figure 6 is a sectional view taken as indicated by the line 6--6
of Figure 5;
Figure 7 is a fragmentary showing of certain pawl mechanism em-
bodied in the apparatus illustrated in Figures 5 and 6;
Figures 8 and 9 are sectional views taken as indicated, respective-
ly, by the lines 8--8 and 9--9 of Figure 1, but on a larger scale, illustra-
ting parts of the handle mounting means on the lever, for easy change of
handle operating positions;
Figures 10 and 11 are sectional views taken, respectively, as
indicated by the lines 10--10 and 11--11 of Figure 5, but on a larger scale,
illustrating the configuration of the drum hub and the mode of applying the
two or more snubbing turns of the cable thereon, and the means for preventing
the loosening.of said turns;
Figure 12 is a sectional view of the operating handle;
Figure 13 is a sectional view, on an enlarged scale, taken as
indicated by the lines 13--13 of Figure 12; and
Figures l-D and l-S are comparative fragmentary views, generally
similar to Figure l; but Figure l-S illustrating a different rigging of the
hoist, i.e., a single-line rigging; while Figure l-D shows the double-line
rigging of Figure 1, but with the pulley-block pulled close to the winch frame
structure.
Detailed Description of the Preferred Embodiment
With initial reference to Figures 1, 2, 5, and 6, there is shown
a winch-hoist comprising: a main frame 10, a drum 11, rotatably mounted on
said main frame through the agency of an axle 12; lever means 13, pivoted on
said axle 12 for swinging movements about the rotational axis of said drum 11;
and ratchet and pawl means indicated generally by the reference numeral 14
(see also Figure 7) and to which further, more detailed reference will be made
in what follows.
1 ~)46Q48
The ratchet and pawl means are responsive, selectivcly, to swinging move-
ments of the lever, to rotate said drum for reeling of cable 15 thereon,and,
alternatively, for controlled opposite rotation of the drum for unreeling of
cable therefrom, under the pull of the load.
The main frame 10 is of generally box-shape (see Figures 2 and
5), comprising an upper cross-member or anchor-portion 16, a pair of spaced
vertical walls or arms 17 and 18, and a bottom cross-brace 54. Generally
midway of the length of the walls or arms 17, lS, they are provided with con-
fronting apertures which serve to journal the axle 12, which may be secured in
the arms in any convenient manner. The lever 13 is of U-shape, comprising
a cross-member portion l9 and a pair of spaced arms 20 and 21. The arms 20
and 21 are spaced a distance sufficient to span the width of the main frame
10, as defined by its arms 17 and 18, and the latter arms are received between
the arms 20 and 21 of the lever. As clearly appears in the drawings, the
axle 12, on which the rotatable drum 11 is mounted, extends through the arms
17 and 18 of the box-shaped frame a distance sufficient to provide for
pivotal molmting of the arms 20 and 21 of the swingable lever 13 outside of
the frame.
It should be noted that, as shown in Figures 2 and 5, the upper
portion of frame 10 is of considerably heavier cross-section than the lower
portion thereof. The significance of this will be clear from what follows.
The arm 20 of the lever is provided at its free end with an en-
larged boss 22, within which is received the operating handle H in a manner
to be described in what follows. As shown in Figure 9, the axle 12 extends
within the boss 22 a distance just sufficient to ]ournal the arm 20, thereby
affording room for mounting the handle structure to be described.
As appears to good advantage in Figures 5 and 6, the drum 11 com-
prises a pair of spaced flanges 23 and 24 and a hub or barrel portion 25.
The flange 23 carries a ratchet wheel 26, preferably formed integrally with
flange 23 and carrying a plurality of ratchet teeth 27 (see particularly
Figure 6). When it is desired to reel cable on the drum, the drum must be
driven in the direction indicated by the arrow R in Figures 6, 10 and ll,
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and such drive is effectcd by cooperation between the`teeth 27 of ratchet
wheel 26 and a pair of pawls, one of whicll (28) is pivotally secured to the
lever 13 by a pin or axle 29, and the other of which ~30) is pivotally se-
cured between the arms 17 and 18 of frame 10, by a pin or axle 31. Prefer-
ably, the pawls are made of a sintered powdered metal, oil-impregnated, so
as to be self-lubricating on their axles. The ratchet and pawl drive is, in
principle, the same as the apparatus disclosed in said Patent No. 2,633,328.
While reference may be had to the disclosure of said patent, for detailed
understanding of the functioning of the ratchet and pawl mechanism, such
detaiIed description is not required herein, since this apparatus is not,
per se, a part of the present invention. For the purposes of the present
disclosure, the following description is sufficient.
Lever-carried pawl 28 can be biased either into or out of engage-
ment with the teeth 27 of ratchet wheel 26, by a spring 32, which has one
end retained in the cross-member 19 of lever 13 and its opposite end, 32a
disposed between a pair of spaced ears 33 and 34 which project from pawl 28
~Figures 5, 6 and 7). A cocking lever 35 is pivotally mounted on rod 29.
When this lever occupies the position shown in Figure 6, the pawl 28 is
biased toward its position in contact with the teeth 27. When the cocking
lever occupies the position shown in Figure 7, the spring portion 32a biases
the pawl 28 out of contact with the teeth 27, as shown. A looped spring 36
has one end 36a secured to arm 17 of the main frame, and its other end 36b
secured to the main frame pawl 30. This latter spring normally serves to bias
the pawl 30, which is a holding pawl, toward contact with the teeth 27, al-
though the pawl 30 is movable out of contact with the teeth, either by pres-
sure exerted against a finger release 37 or by cooperative contact between
pawl 28 and spring 36 in accordance with the principle described in the above-
referenced patent.
In summary, when it is desired to reel cable upon the drum barrel
25, the lever 13 is swung downwardly from the position shown in full lines in
Figure 6, toward the lower position shown in broken lines in said figure.
The limiting positions of the lever are established by contact of a le~er-
i~46(~48
carried stop 38 against tllc upper portion of maill frame arm 17, as shown in
Figure 6, or by contact of said stop against the lower portion of said arm,
as sho~n in chain-dotted lines in the figure. In response to such swin~ing
movements of lever 13, the pawl 28, being engaged with one of the teeth 27,
carries said tooth downwardly and rotates the drum an increment established
by the angular distance between the upper and lower positions of lever 13,
or any intermediate amount measured by tooth-by-tooth steps, if desired.
The frame-carried pawl 30, which is also biased toward the teeth, serves as
a holding pawl, the point 30a of this pawl engaging the teeth 27 successively
as they pass by, thus preventing retrograde movement of the cable under tha
influence of the supported load, as will be understood.
~hen it is desired to permit reverse rotation of the drum to lower
the load, the cocking lever 35 is moved to the position shown in Figure 7, in
which position the pawl 28 is held out to contact with the teeth 27 of ratchet
wheel 26, during downward movement of the lever 13. As the lever 13
approaches the lower position illustrated in Figure 6, and as is clearly
shown in the referenced patent, pawl 28 comes into contact with spring 36
and the said spring is acted upon by the pawl to bias pawl 30 away from the
teeth 27. At the same time, the lever-carried pawl 28 is being moved, by
contact with spring 36, back into its ratchet-engaging position, against the
opposing bias exerted by spring 32. This cooperative movement, which will
only take place when the cocking lever 35 is in the position shown in Figure
7, permits the ratchet wheel to move in the unreeling direction, under the
influence of the load, and angular distance defined by one tooth, under the
control of the lever.
In short, the ratchet and pawl means described is responsive to
swinging movements of the lever 13 to rotate the drum, and thercby reel any
cable associated with the drum, and to allow controlled unreeling thereof
under the influence of the load.
If a considerable length of cable is to be unreeled, under no-load
conditions, it may be more convenient to hold the pawl 30 out of contact with
the teeth, by exerting pressure against finger release 37, rather than
lV46(~!48
repeating the tooth-by-tooth sequcnce described above.
As shown in Figures l and 2, the cross-member or anchor-portion 16
of frame lO is provided with means for anchoring the hoist to fixcd structure.
In ~he illustrated embodiment this means takes the form of an anchor hook 39
rotatably mounted within the anchor-portion 16, through the agency of a shank
39a and a castellated nut 40, secured in known manner.
When the cable 15 is looped or doubled back, for amplifying the
pulling or lifting capacity of the winch-hoist (which is the rigging arrange-
ment shown in Figures 1 and 2), two hooks are normally employed, in addition
to the anchor hook 39. These two hooks are shown at 41 and 42 in Figures l
and 2. In this doubled-back arrangement of the cable 15, the end(which may
for convenience be termed the free end) of the cable is formed with an end
loop 15', held by the clamp 15"; and this end loop 15' is secured to the hook
42, by means of a clevis 42a formed on said hook, and a securing pin 42b,
which may be held by a cotter pin or the like 42c. Hook 42 is secured (in
the rigging of Figures 1 and 2) to a loop, or eye, L, on frame 10 at a loca-
tion which provides special advantages, as hereinafter described, (with
reference also to Figure l-D).
The bight of the line thus formed by the two runs of the cable 15,
as shown, carries the hook 41, by means of the pulley-block now to be des-
cribed.
The load-bearing hook 41 is pivotally secured by shank 41a and
castellated nut 41b, to the pulley-block or yoke 43, which is bifurcated, as
shown in Figure 3, to receive a pulley 44 about which the cable 15 is looped~
in this illustrated rigging position. An axle 45 releasably secures the yoke
assembly, and the axle may be withdrawn from the yoke to disassociate the
assembly from the cable.
Retaining means (Figures 3 and 4) comprise a pin 46 and a looped
spring 47. In accordance with known practice, the pin is insertab'le within a
cross aperture provided in axle 45, in the manner shown in Figure 3, after
which, swinging of the loop, from the lower position illustratcd in Figure 4,
to the upper position (see particularly Figure 1), resiliently en~ages the
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spring loop 47 with a boss 48. The latter is formed as part of the yoke
and is relieved, at 49 (Figure 1), to permit entrance of the spring loop 47.
When it is desired to remove this load-carrying assembly from association
with 1;he cable and utilize the winch-hoist in the rigging condition which
employs a single run of cable, with the hook 42 serving directly to support
the load, it is a simple matter to rem~ve the securing pin 46, withdraw the
axle 45, and remove the yoke 43 and pulley 44 from the cable. Then, as shown
in Figure l-S, the hook 42 is uncoupled from the loop L, and the end portion
of the cable hangs straight down from the drum, and carries the load directly
by means of hook 42.
Cable guide means is provided at the lower end of frame arms 17 and
18, as is illustrated in Figures 1 and 2. This guide means comprises a loop
of metal 50, apertured at 51, and being of generally bell-crank form, as
appears most clearly in Figure 6. One ar~ of the bell crank provides the
apertured loop SO, while the other arm 52 is journaled to the arms 17 sd lo
by an axle rod 53, and said arm 52is also bolted to a web 54 which forms part
of the structure of main frame 10 ~Figure 5), extending between the frame arms.
In fabricating apparatus as disclosed, the frame, lever, and certain
other parts have been cast of aluminum alloy. Good results are obtained if
the alloy is of the kind specified in the trade as number 356-T-6. As wiIl
be appreciated, the principles discussed are applicable to winch-hoists of
various si~es. Hoist capacity may range up to several thousand pounds, a
capacity of 2,000 pounds being representative of a small portable winch-hoist.
In any particular embodiment, the maximum capacity of the apparatus is, of
course, achieved when the equipment is rigged to use multiple runs of cable,
for example the doubled cable arrangement, with pulley-block as best seen in
Figures 1 to 3 and Figure l-D.
The winch-hoist includes novel means for releasably retaining the
cable on the drum 11, by snubbing the cable on said drum. For example, the
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first fe~ turns of cable on the hub of the drum are so held thereon as to
provicle a very firm snubbing or
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gripping effect and cannot be inadvertcntly loosel)cd in normal use; and yet
the cable can be easily removed when desired, and can be replaced without the
need for any unusual type of cable or cable fittings or any special tools.
As will be understood, this arrangement, which will now be described in
detail, obviates former difficulties involved in removing and replacing worn
or bro~en cable, and permits ready replacement of the cable in the field.
Now making particular reference to Figures 5, 10 and 11, it will
be seen that the hub or barrel portion 25 of the drum is provided with a pair
of passages to receive certain portions of the cable; and the surface of the
drum, in the region of said passages, is desirably provided with helical
grooves. The grooves are shown at 55, in Figure 5, and the grooving is pre-
ferably V-shaped in cross section. Such shaping of the grooves assists in
the tight gripping of the cable on the drum and increases the snubbing there-
of on the drum, during wrapping of the first few turns, as the cable is
applied. The cable-receiving passages, one of which appears at 56 in
Figure 10, and the other at 57 in Figure 11, are spaced axially along the
drum in the region of drum grooving, and each passage extends from the drum
surface through the drum in a plane which is transverse to the drum axis, as
is clearly seen from Figures 10 and 11. Passage 56 extends through the drum
in a mid-region of the axial length of the drum, as seen in Figure 5.
Passage 57 extends through the drum in adjacency to the lefthand flange 24,
as the drum appears in Figure 5.
As explained in more detail below, portions of the cable are dis-
posed within these passages; and a cable holding device is associated with
at least one of the passages, and preferably such cable holding devices are
utilized at both passages, as will appear hereinafter.
When applying a cable to the drum, the free-end portion of a
cable, that is, a portion which would equal several turns around the hub 25
of the drum 11, is threaded through the passage 56 (from right to left as
seen in Figure 10). This portion of the cable is then wrapped around the
hub (clockwise as viewed in Figure 10 -- counterclockwise as viewed in
Figure 11), being laid helically in the grooving 55 (seen in those Figures
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and in Figure 5) to form the snubbing turns on the drum; and the ultimate
end 15a of this cable is then pushed into the bore or passage 57 (see Figures
5 and 11).
As shown most clearly in Figures 10 and 11 a pair of arcuately-
curved cable supporting ribs or lands 58, 59 are provided, each being
adjacent one of the passages 56, 57. Each land projects above and extends
circumferentially around a portion of the hub surface, the projection being
about equal to the cable thickness. Land 58 projects above the general hub
surface in the region of passage 56, and land 59 projects above said surface
in the region of passage 57. The ribs or lands position and support the
next layer of cable, as wound on later, in areas where portions of the first
few turns extend into passages 56 and 57 of the hub. They also have the
advantage of strengthening the structure in the region of the set-screws 60
and 61 now to be described.
The cable holding or securement means referred to above comprises
a pair of set-screws or the like, 60 and 61, each of which is received with-
in a recess formed in a corresponding one of said lands. The screw elements
are threaded within the drum hub structure, preferably including the land
projections, and enter the passages 57 and 56 to engage the cable therein in
the manner plainly shown in Figures 11 and 10.
It should be understood that the screw devices 60 and 61 are not
depended upon to carry the working load on the cable. Rather, they function
as follows: After the snubbing portion of the cable has been passed through
the bore 56, wrapped a few times around the hub (in the illustrated case,
about 2 i/2 turns), and the end 15a inserted into bore 57; then screw 60 is
turned in tight against the cable-end 15a, even to the point of being par-
tially embedded in the cable, as shown in Figure 11. This can hold the
cable-end 15a as against a pull of perhaps 100, 200 or 300 pounds. The
cable (toward the right, at 15 in Figure 10) is then subjected to a substan-
tial pull -- even as much as several thousand pounds -- depending upon
cable strength,,and the intended load capacity of the winch-hoist, so as to
tighten the several turns 15c into a snubbing or capstan-like grip on the
.
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_ _ _ . _ . . ... .. . .
i~46~48
hub. The screw 61 may then be tightened on the cable portion 15b (as seen in
Figure 10) to keep the snubbing portion 15c against unintentional loosening.
Normally, screw 61 is not turned down as tightly as screw 60 (as is evident
from comparison of Figures 10 and 11), because, if a very heavy load is im-
posed on the cable in actual service, the portion 15b may have to have limited
freedom to slide or stretch, under the load, so that the snubbing turns will
be correspondingly pulled tighter. Screw 61, in some cases, may even be
dispensed with, but it does tend to avoid unwanted loosening of the snubbing
turns 15c when load is taken off the winch-hoist.
As explained above, the illustrated arrangement has the particu-
lar advantage that field replacement of the cab~e is a very simple matter.
With either the original cable, or with a replacement cable, it will now be
understood that by turning the drum 11 in the direction of arrow R, the second
course of the cable will wind across the first course and be laid smoothly
thereon, with the aid of the land areas 58 and 59; and the subsequent layers
will wind smoothly back and forth. ~lthough shown only fragmentarily in the
drawing, at S in Figure 6, the hoist preferably includes a flexible cable
shield which contacts the cable and promotes even wrapping on the drum. It
also prevents any tendency for the cab~e to "throw-off" the drum.
As will be evident from the foregoing description, when it is de-
sired to use the hoist with a doubled cable, as appears in Figures 1, 2, and
l-D, the free end of the cable, carrying the hook 42, is releasably coupled
to the main frame 10 at an upper location of said main frame, rather than
beneath the latter, as has been common in the prior art. To accommodate such
releasable securement of the cable hook 42, them~in frame 10 is provided with
the above mentioned structure L which forms an eye within which the hook 42
is received. The loop structure L is formed upon and projects from the frame
cross-portion 16, and from a relatively heavy web W which extends between the
frame arms 17 and 18 (Figures 2, 5, and 6). Such location of the loop L makes
it possible
~ - 12 _
1~)46(~48
to lighten the hoist to a considerable degree, since frame portions extending
below the
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1~)46~?48
cross-portion and the web l~ may be of lesser cross section than the up~er
frame portions.
The way in which this configuration and construction minimizes
the hook-to-hook distance will appear, strikingly, from a comparison of
Figures l-D and l-S. In the double-rigged arrangement (illustrated in de-
tail in Figures 1 to 4), though it employs two load hooks, 41 and 42, with
hook 41 forming part of a load-carrying pulley-block assembly, the cable
can be pulled up, by winding on the drum 11, until the distance from the
anchor-hook 39 to the load-hook 41 ~as seen in Figure l-D) is so shortened
as to be quite comparable to the distance from hook 39 to hook 42 in the
single-rigged operation (seen in Figure l-S), due chiefly to the securing
of hook 42 to the loop or eye L adjacent the top of the frame in the double-
rigged operation.
The novel handle H will now be described, as will the structure
of the arm of the pawl-carried lever, which accommodates said handle in any
of a plurality of different positions -- four being employed in the illus-
trated embodiment. The handle comprises two telescopically-arranged tubes
63 and 64, as appears in Figures 1, 12 and 13. The tube 63, which is to be
coupled to the lever 13, has nested within it a sleeve 65 (Figure 12) which
is of a size to receive a bendable link 66 which projects axially of the
handle for insertion within the enlarged end of boss 22 of lever arm 20.
This link may be of steel and is designed to bend in the event of an over-
load imposed on the handle.
Although it could be made of uniform diameter, with the desired
bendability, the link 66 desirably has different diameters at different zones,
as will now appear. For example, it is advantageous to make the link of a
general diameter large enough to just provide for the maximum bending
strength for which it might be called upon in a unit intended for a certain
maximum load, but which might be variably adapted for differing maximum loads~
and for this purpose a section or zone of it may be turned down to a smaller
diameter.
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1~46(~48
Furthermore, for ready ~daptability to being quickly mounted on,
and disconnected from, the several different soc~ets or passages 79 in the
lever boss or hub 22, by means of a convenient snap fastener, it is desirable
to provide a zone of reduced diameter to engage such a fastener.
In the illustrated embodiment, the link is configured to have two
annular zones of reduced cross section. These annular zones are shown in
the drawings at 67 and 68, which are thus spaced by larger land areas 69 and
70. ~hen the handle is in use, as will be described in t~hat follows, annular
zone 67 and land areas 69 and 70, lie within the arm of the lever means, while
a short portion of zone 68 projects from the handle tube 63 and is subject
to bending under excessive applied force. Zone 68 may be of one diameter,
in its exposed part and in the part housed in tube 63 (as sho~n); or those
two parts may be of different diameters -- for example by turning down the
exposed part. Also, the housed part may directly fit the inside of tube 63,
or may be fitted to an adapter sleeve (as shown). As will be plain from what
follows, the ex~osed portion of the zone 68 bends in response to overloads
applied to the handle, thereby protecting the winch, the user, the load, and
the handle.
The sleeve 65 may be staked within the tube, as shown in Figure
12 at 71, and/or a cross pin 72 may be placed radially through apertures
provided in tube 63 and sleeve 65 to retain the safety link 66 in position.
The outboard tube 64 is of smaller diameter than the tube 63, and is received
within the latter tube. Outboard tube 64 has an end 73 (Figure 13) sized to
fit snugly within the inboard tube 63 and, if these two tubes be fully tele-
scoped, the inboard end of portion 73 of tube 64 will bear against the
sleeve 65. For clarity in illustration, the two tubes are shohn in their
positions of substantial relative extension, to form a handle of maximum
length, having a ring 74 at one end thereof. The two tubes may be held in
any selected position of extension by rotation of an externally knurled and
internally threaded furrule 75, which cooperates with a pair of tapered and
split lock washers 76 (Figure 13) to secure the two tubes against relative
movement .
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~46Q48
The righthand portion of tube 64 is of a diameter son~ewhat smaller than the
diameter at 73, the smaller diameter being of a size which just passes through
the ferrule 75. The enlarged portion 73 and the tapered portion 77, which
lies between the larger and smaller diameter portions of tube 64, cannot pass
through the split washers 76, or through the outer end of ferrule 75, so that
the tube 64 will not be accidentally disengaged, either when adjusting the
handle length, or during operation of the winch. When adjusted, the tele-
scopic handle portions are held in the desired position when the ferrule 75
is tightened; and the handle is ready to use.
The outboard tube 64 is sized to receive one or more (in this
case two), safety links (see 66a) to be kept available as spares. A cross
pin 78 (Figures 12 and 13) prevents escape of the spare links through that
end of the tube 64 which is nested within the tube 63. The ring 74 passes
through the tube 64 and is of split type, being readily removable to afford
access to the spare links.
Turning now to the novel manner in which the handlell can be as-
sociated with the lever 13, and with particular reference to Figures 1, 8 and
9, it will be observed that the handle may occupy any one of four different
positions, depending upon the convenience of the user, and possible environ-
mental obstructions. One position of the handle appears in full lines inFigure 1, and three other positions, each separated by 90, appear in broken
lines. The handle is also shown in broken lines at a position indicated by
the reference numeral 11', this being a position which the handle might
occupy after having been subjected to a force in excess of a predetermined
limit. If the handle were subjected to such a force, the exposed annular
area 68 would bend as is indicated at 68a in Figure 1. Those portions of the
bendable link which are received within the boss 22 of arm 20 of the lever 13
would be supported by the said structure and would not bend significantly.
To accommoda~e association of the handle at any one of a number
of desired locations within the lever 13, arm 20 of the lever is provided
with a plurality of (in this instance four) angularly related passages formed
in coplanar relation in the enlarged boss 22.
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104604~
All of these passages are identical, and they have been identified by the ref-
erence character 79, appearing in Figures 2, 5, 8 and 9. In this embodiment,
these passages are disposed radially, at 90 angles, about a region of inter-
sect;ion 80, located within the arm of the lever. Detent means 81 projects
into this region from a side of the boss 22 (see particularly Figures 8 and
9~, and enters the region of intersection between the several passages 79.
This detent means, which takes the form of a pin, is resiliently held in
position in which its nose 82 is engageable within the annular recess 67 of
the bendable link 66. Conveniently, the resilient holding means comprises a
flexible spring rod 83 which is captive within a slot 84 (Figure 93 provided
in the boss 22. When it is desired to associate the handle with the lever,
or to disassociate it therefrom, the pin 81 is withdrawn slightly, against the
resilience of spring 83, permitting its nose 82 to be withdrawn from the
annular region 67 of link 66. A cross rod 85, which passes through pin 81,
may be grasped to withdraw the pin. The described handle arrangement which
may be associated with the lever in any one of several different positions
makes it possible to optimize the "pull-angle" of the handle.
In summary, the embodiment disclosed provides an improved winch-
hoist in which field replacement of the cable is a simple matter, without the
need for cable with special fittings, or special tools, and the hoist may be
made lighter, for any given capacity. In addition, these advantages are
achieved in a structure which minimizes the hook-to-hook distance, and there-
by maximizes the lifting distance and/or the space for a load to be handled.
The novel telescopic handle may be adjusted as to length, for maxi-
mum usuable leverage, shortening for tight spots or for quick rewind. The
novel safety links, and the special manner in which they are associated with
the handle and the pawl-carrying lever, provide advantages both as to facility
of changing links and as to ease of altering the angular position of handle
mounting.
~ - 16 -
10460~8
It should be noted that where the operating handle 11 is shown in
fu:Ll lines in Figure 1, and, in broken lines at 11~ in that Figure
- 16a -
104~4~
(indicatillg the result of e~erting an excessive force on the lever); and also
with respect to the description as to the most convenient or the most ef-
fect:ive position for mounting and/or operating the handle; it should be
understood that this is only illustrative. In some, if not most, instances
where the winch-hoist is anchored by hook 39 from an overhead structure, the
normally desired position of greatest advantage to the operator would be a
position where the handle is pulled straight down, when the maximum load is
being lifter or lowered.
While a stranded steel cable is typically used in, or associated
with, the winch-hoist, it should be understood that the term "cable" is
used in a broad sense, to refer to any flexible member suitable for employ-
ment in the environment here involved, except where a more specific meaning
may be definitely required by the context.
Also, the terms "top" of the winch hoist, "bottom" of the same,
"upper" and "lower" and "right" and "left", and similar terms, are used,
for convenience, with reference to the illustrations in the drawings; but it
will be understood that this mechanism may be used in an upright position,
or in a horizontal position, or even upsidedown; wherever lifting or
lowering or pulling is required; so that the above and similar terms are
used simply in an illustrative and not a limitative sense.
In conclusion, it is intended that the entire disclosure be
considered as illustrative, and as limited only by the claims, and that the
latter be construed as broadly as permitted by the prior art.
