Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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This invention relates to a surface bolt adapted to
be mounted on a closure member, such as a door or window,
the bolt being slidable in guides between position into and
out of engagement with a keeper or the like, the bolt having
a recess on its outer surface adapted to be engaged by one
of the guides in the locking position of the bolt and to be
resiliently and releasably held in such engaged position
by a spring housed in the guide. The guides are provided
with means to receive the bow of a padlock in a position to
prevent unlocking of the bolt or, in a modified form, to
prevent locking or unlocking, selectively.
The present device is an improvement over similar
bolts, operating similarly, wherein the spring is a leaf
spring extending into the space between the guides and
bearing against the under side of the bolt. It is also
an improvement over the bolt shown in Keeler patent No.
2,620,213 wherein the body of the bolt is channeled and
guides fit within the channel.
In a typical surface bolt having a retaining recess
and a leaf spring, two spaced guides and a combined spring
mounting and bolt stop are carried on the surface of an
elongated base plate, having holes near each end for
securement to the closure element, such as a door. A stop
for limiting the retraction movement is provided neaT the end,
beyond the rear guide. This assembly may be too long for
use in some situations and the holes may be inconveniently
spaced, so that the lock can only be used where there is
room enough for the base plate and good wood opposite each
screw hole.
It is an object of the present invention to provide a
bolt of the character described wherein the spring is wholly
contained within one of the guides.
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It is another object of the invention to provide
a bolt wherein each guide has its own base, for securement
to a surface at any suitable point and the guides being spaced
apart any convenient distance, within indicated limits.
S [t is a further object of the invention to provide
a bolt wherein one guide is provided with a coil spring,
under compression, and a bearing saddle urged by the spring
against the under side of the bolt, and the other guide
has only a bearing saddle.
It is a still further object to provide one guide with
an extension adapted to receive the bow of a padlock in a
position to hold the bolt in locking position or, alterna-
tively, to provide each guide with such an extension for holding
the bolt in locked or unlocked position, selectively.
lS It is yet another object of the invention to provide
certain improvements in the form, construction and arrange-
ment of the several parts whereby the above named and other
objects may effectively be attained.
The invention accordingly comprises an article of
manufactuTe possessing the features, properties, and the
relation of elements which will be exemplified in the
article hereinafter described, and the scope of the
invention will be indicated in the claims.
A practical embodiment of the invention is shown in
the accompanying drawings, wherein:
FIG. 1 is an isometric projection of the bolt mounted
on the surface of a door and engaged with a keeper on an
adjacent surface, such as the door jamb;
PIG. 2 is a longitudinal section through the parts
shown in Fig. 1 in a plane perpendicular to that of the
door surface;
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FIG. 3 is a longitudinal section as in Fig. 2 with
the bolt in unlatched position.
FIG. 4 is a longitudinal section, similar to Fig. 2,
through a modified form of bolt assembly;
FIG. 5 is a transverse section on the-line V-V of
Fig. 4, and
FIG. 6 is a detail plan view in the direction of
the arrow VI in Fig. 4.
Referring to the drawings and particularly Figs. 1 to 3,
-- 10 the bolt 10 is a bar having a somewhat flat rectangular
cross-section, its forward end 11 being preferably beveled
along each edge, and its rearward end portion having mounted
thereon an operating knob 12 with a flat ~op surface 13.
Adjacent the knob, the surface of the bolt is provided
with a transverse recess 14, at least the forward wall 15 of
which lies at a right angle to the longitudinal axis of
the bolt. A stop 16 is mounted on the under side of the bolt.
A first guide 17 comprises a base 18, which may be
laminated, and a staple portion 19, so dimensioned as to
permit free sliding movement of the bolt therethrough with -
additional space to accommodate an arcuately profiled saddle
20, the center of which bears resiliently against the under
surface of the bolt. The guide is bored near each end to
receive the mounting screws (or bolts) 21 for attaching the
guide to a surface, as near one edge of a door D. --
A second guide 22 comprises a base 23 and a staple
portion 24, similar to the staple portion 19, the base
being centrally bored at 25 and provided with a coil spring
26 under compression, biasing a saddle 27 toward the under
surface of the bolt.
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The base 23 corresponds to the upper lamination of
base 18, the lower lamination being replaced by a lock
plate 28, extending under the guide and reaTwaTdly therefTom,
the p]ate having a palr of upturned ears 29 with holes 30
to receive the bow of a padlock, as shown in broken lines in
Fig. 1, or other retraction-arresting device such as a pin
or bar. The base 23 and plate 28 are bored near each end of
the base to receive mounting screws (or bolts) 31.
The bolt set is completed by the provision of a
keeper 33, having an opening 34 sized to receive freely the
forward end of the bolt and adapted to be mounted on a
support, such as a door jamb J, by means of screws (or
bolts) 35. -
The recess 14 has a dimension, lengthwise of the
bolt, such that it can receive freely the top run 24' of the
staple 24, as shown in Figs. 1 and 2, the bolt being urged
into that position by the spring 26. When so latched, the
wall 15 will catch against the edge of the guide, and the
bolt will not accidentally retract. It is difficult or
impossible to release the bolt from outside (i.e., from
below each of the Figures). By the addition of a padloc~ -
the security is further increased. In order to free the
bolt, pressure is applied in the direction of the aTrow h in
Fig. 2, overcoming the bias of the spring, and the bolt can
then be retracted as shown in Fig. 3.
The respective guides should be so located that the stop
16 will hit the saddle 27 (as in Fig. 3) before the forward
end of the bolt is drawn out of the guide 17 but after the
bolt end has cleared the keeper 33. The ears 29 and holes 30
are so positioned that a padlock bow passing therethrough
will prevent retraction of the bolt out of the keeper. By
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locating the stop 16 between the guides and the spring 26
within a guide, both out of sight, the appearance of the
assembly is enhanced.
It may frequently be important or desirable to
S provide means to prevent the bolt from being moved, acci-
dentally, inadvertently or mischievously, from unlocked
position to locked position, and such means is shown in
Figs. 4, 5 and 6, the added features being applicable most
conveniently to a bolt which is longer than that shown in
Figs. 1 to 3.
The bolt 40 shown in Figs. 4 to 6 is somewhat longer
than the bolt 10 but the features associated with its knob
end (the left portion of Fig. 4) are identical with the
features described in connection with the corresponding
lS portions of Figs. 1 to 3, and description thereof need not
be repeated.
The guide 41 nearer the edge of the door D' comprises
a base 42, staple portion 43, and saddle 39 which may be
identical with the parts 18,19 and 20, but spacing blocks
44 are mounted on each end portion of the staple and a lock
plate 45, identical with plate 28 but inverted, is secured
to the top of the blocks 44 by screws (or bolts) 46 which
pass through plate 45, blocks 44, staple 43 and base 42 into
the door D'. The lock plate has a pair of downturned ears
47 with holes 48 to receive the bow B of a padlock (shown in
broken lines in Figs. 4 and 6) the ears straddling the bolt
40 at a point rearward from the guide 41, and the bolt being
provided with a stop 49 on its upper surface in a position
to engage the padlock bow and prevent the bolt from advancing
beyond the unlocked position shown in Fig. 4. The keeper 50
in Fig. 4 is the same as the keeper 33 in Figs. 1 to 3 and
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serves the same purpose.
With suitable positioning of the stop 49 and the
lock plate 45, a padlock engaged in the latter could act ~-
to hold the bolt in locked position, as an alternative to
the provision of a lock plate 28 adjacent the guide 22.
The rivet heads 51,52 shown beneath the saddles
20 and 39, respectively, are conventional, serving to prevent
the saddles (which are, in effect, short leaf springs)
from collapsing or taking a set when the door on which the
bolt is mounted is subjected to a severe shock, as by
being hit by a vehicle.
It will thus be seen that the objects set forth
above, among those made apparent from the preceding
description, are efficiently attained and, since certain
changes may be made in the above article without departing
from the spirit and scope of the invention, it is intended
that all matter contained in the above description and shown
in the accompanying drawings shall be interpreted as
illustrative and not in a limiting sense.
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