Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
'.L~5~5~
The present inven-tiol. relates to a mo-tor driven bell
_;ound c,enerating system in w'.ich a small size of mo-tor is
.rcorE~orated for energizing the system, and more par~icularly
to a bell sound yeneratin(3 sys-tem constructed such -thdt
ro-tational movement of the motor is converted into reciprocative
or turniny operation of the hammer, hammer arm or hammering
rod so -~:hat s-triking or hammering effect is imparted to the
bell gong which serves as a sound source.
It is an object of the invention to provide a new and
~nique motor driven bell sound generating system whi_h is
capable of generating any required quantity and volume of
bell sounding.
It is another object of -the invention to provide d
motor driven bell sound yenerating system which is capable
of easily select and determine the op-timum number of hamrnering
or striking operation and working stroke of hammer means.
It is ano-ther object of the invention to provide a
motor driven bell sound generating system which is simple
in structure and easy to be manufactured.
The present invention provides a motor driven bell sound
generatiny system comprisiny: a base; a gong mounted on the
base; a hammer; an electric motor mounted on the base and
having a rotatable drive shaft; resilient means, connected at
one end to the hammer, for imparting reciprocating movernent
to the hammer to strike the gong; and drive means, fixedly
attached to the drive shaf-t, for impar-tincJ oscillation
movement to the resilient means to thereby cause the
reciproca-ting movement of the hammer.
The drive means may comprise a cran]c member ex-tencling
perpendicular to -the .lXiS of the drive shaft, and w`..crein the
'' ~;;;q
.5~
resilient means connects the namrner to -the free end of -the
crank nember and ex-tends generally perpendicular to the drive
shaft, the resilient means being of an elongated shape and
axially contractible.
Alterna-tively, 'he drive means may comprise a ratchet
extending perpendicular to the drive shaft, wherein the
resilient means is a leaf spring secured at one end to the
base ar-ld carrying the hammer at the other end thereof, the
leaf spring extending substantially parallel to the drive
shaft and haviny an engaging portion engageable with the
ratchet for the oscillation movement.
The present invention will now be described in
further detail with reference to the accompanying drawings,
in which:-
Fig. 1 is a schematic illustration of the arrangement
of the conventional electromagnetically driven bell sound
generating system, wherein a part of the bell gong is par-tially
shown in a sectional view.
Fig. 2 is a plan view of a motor driven bell sound
generating system in accordance with -the first embodiment of
the invention, wherein -the bell gong is removed for the
purpose of simplification of illustration.
Fig. 3 is a front view of the motor driven bell sound
generating system in Pig. 2.
Fig. ~ is a partial front view of the modified crank
member in use for the bell souncl yenerating system in
accordance with the first embodiment of -the invention.
Fig. 5 is a partial view of the mod:ifiecl crank member
as illus-trated in E'ig. ~I.
-- 2
,
3~
Fig. 6 is a vcrtical sectional view of the bell
sound jener~ting system in accordance with the first
embodirilent of -the invention, said system being secured to
the bell gong.
Fig. 7 is a schematic plan view of the motor driven
bell sound generating sys-tem in accordance with the second
embodiment of the invention, whereir,-the bell gong is
removed.
Fig. 8 is a front view of the bell sound yenerating
system in Fig. 7.
Fig. 9 is a vertical sectional view of the bell sound
generating system in accordance with the second embodiment
of the invention together with the bell gong to which said
system is secured.
lS Fig. 10 is a schematic plan view of the motor driven
bell sound generating system in accordance with the third
embodimen-t of the invention, wherein the bell gong is removed
in the same sense.
Fig. 11 is a front view of the bell sound generating
system in Fig. 10.
Fig. 12 is a perspective view of the formed leaf
spring in use for the bell sound generating system as
illustrated in Fig. 10 and 11.
Fig. 13 is a vertical sectional view of the bell
sound generating system in accordance with the third
embodiment of the inven-tion together wi-th -the bell gong to
which said system is secured.
Fig. 1~ is a schematic front view of the motor driven
.~ bell sound generating system in accordance with the fourth
-- 3 --
embodimen-t of the inven-tion, where:in the bell gong ~ith said
systern secured thereto is shown in a vertical sec-tional view.
Fig. 15 is a plan view of -the bell sound generatincJ
system, taken in line XV - XV in Fig. 14, wherein the bell
sound is partially shown in a sec-tional view.
Fig. 16 is a partial schematic plan view of the
modified hammer in use for the bell sound generating system
in accordance with the fourth embodiment of the invention
in Fig. 14 and 15.
Fig. 17 is a schematic plan view of -the motor driven
bell sound generating system in accordance with the fifth
embodiment of the invention, taken in line XVII - XVII in
Fig. 18, wherein the bell gong is shown in a horizon-tal
sectional view.
Fig. 18 is a front view of -the bell sound generating
system in Fig. 17, wherein the bell gong is partially
shown in a vertical sec-tional view.
Fig. 19 is a schematic plan view of the motor driven
bell sound generating sys-tem in accordance with the sixth
embodiment of the invention, wherein the bell gong ~o which
said system is secured is shown in a horizontal sectional
~rieW~ and
Fig. 20 is a perspective view of the bell sound
genera-ting system in Fig. 19, wherein the bell yong is removed
for the purpose of simplification of illustration.
A typical electrically driven bell which is widely
constructed such that a hammer means is elec-tromagnetically
driven for the purposc of generating bell sound. TG facili-tate
the understanding of the invention this kind of conventional
electromagnetically driven bell sound generating systeln will
be briefly described with reference to Fig. 1.
' ` ' , ' ,
.
.~ .
5~
AS illustra-ted in Fi~. 1, a bobbin 2 with a rnagne-tic
core 2a inserted therein and a s-tationary con-tact plate 3
~re securely mounted on the yoke 1, while a vibratory plate
5 having a leaf spring 4 connected thereto at its bottom
portion is rotatably supported by means of the vertically
extending suppor-t members on the yoke. On the extreme end of
said leaf spring 4 is formed a CGntaCt 4a, while on -the top
end of said sta-tionary contact plate 3 is formed another
contact 3a. Further a lead wire ;s ex-tended from the one
end of -the coil 2b on said bobbin 2, while another lead wire 7
is extended from the bo-t-tom portion of said stationary contact
plate 3. Further on the top end of said vibratory plate
5 is arranged a hammer 8 secured thereto at the bottom portion
thereof, said hammer 8 being extended through an opening on
the yoke 1. A coil spring 9 is arranged abou-t the hammer 8,
one end of said coil spring 9 being connected to the yoke 1
in the vicinity of said opening. The bell gong 10 is located
at the predetermined distance from the extreme end of the
hammer 8.
As direct current is applied to the lead wires 6
and 7, it flows through the lead wire 6, the coil 2b, the
contact 4 on the leaf spring 4 and the contac-t 3a on the
stationary contact plate 3 to the lead wire 7. As the bobbin
2 is energized, attractive force is produced through the
magnetic core 2a, whereby the vibratory pla-te 5 is drawn
to~ard said magnetic core 2a. Thus the hammer 8 is displaced
against the coil spring 9 so as to strike the inner wall of
the bell gong 10. A-t the same time the contact 3a is parted
away from the other contact ~a, causing the electrical curren-t
flow to turn off. The magnetic core 2b becomes demagnetized
, 5 -
- and thereby the vibratory pla-te 5 is restored to the originGl
position by mealls of -the resilient force of -the coil spriny 9.
This ca~ses the both con-tact 3a and 4a -to come in contact ~i-th
each other again, resulting in the second elec-trical current
flow produced so as to carry out hammering or striking operation
against the bell gong to generate the required bell sound.
Then the above described opera-tions are repeated.
It is recognized as a drawback with the above described
conventional bell sound generating sys-tem that it is difficult
to select and determine the number of hammering or striking
opera-tions per unit time as required, because said number of
hammering or strikiny operations against the bell gong lO
with the use of the hammer 8 is dependent on a variety of
factors such as rigidity of the leaf spring 4, weiyht of the
hammer, spriny constant of the coil spriny 9 and others.
Further it is pointed out as another drawback that it is
difficult to select and determine the workiny stroke of the
hammer 8 as required, because the movable contact 3a is
released from the stationary contac-t 4a within the very short
period of time. Therefore, as far as the conventional bell
sound ycneratiny sys-tem is concerned, it may be concluded that
because of the above mentioned drawbacks therewith it is
difficult to construct a bell sound yeneratiny system on the
commercial basis, which has -the optimum number of hammeriny or
strikiny operations and as well as the optimum workiny stroke
of hammer means, in spite of the fact that the number of
hammering operation and working stroke at which the maximum bell
sounding is produced are available only on the experimental basis.
-- 6
~ .
The motor driven bell sound generat:ing system in
accordance with the first embodiment of the invention will now
be described with reference to Fig. 2 to 6.
In the drawings the reference numeral 11 denotes a
motor, of which ro-tating shaft 12 is provided with a circular
disc 13 naving an integral crank rnember 14 located in an
eccentric position -therefrom. Said motor 11 is securely
fastened to the mounting plate 16 which is formed by bending
up a cut portion of the base board 15. In the meantime,
r~ 5~Q
;, ~. e ~ r~ r3 (~ e L ~ rl -t i rl g
-l late ] 1 at its (1~1C eu{1 wi tl1 1;1le l:id of eyt~let or the lil~e,
:,aid r11ourltillg ~)1 lt( l`-j be-in~,r ~`or111ed ~y t~eing up a cu-t por-tion
of the ~ase l~(,ard 17, wllere~ -tlle o 1;hér ellcl of said leaf spring
17 is lcept; fri~e In t11e ViCi~lity of said free end of tlle
leaf Spl ln~, le i s 1Oc.~t;e~ n1er 20 ~ ich serves to
strike agLlills-t tll~i inl-ler wall of the bell gong (no~ shown).
~s showll in the drilwi ~ rS, a coil spring 21 is spanned bet~reen
the cranl~ 1llelll1~el l 11 on thc circular disc 13 and the free
L0 end of the 1eal sprirlg l~S so that irlterconncction is made
tllerebe tweell .
II1 the ellll)odilllell-t iII Fig. 2 anci 3 the cran~ member 14
is for1lled witll an aperture 2 2 into ~hieh the one end of
the coil spring '1 is e~;tencle.l, resulting in an engagement
15 f the crallk Inc-~lllber 1l~ -to tlle coil spring 21 provided.
As i1lustrated in Fig. 4 and 5, -the in-tegral crank member 14
may be forme~L in a sllape Or grooved druln, arouIIcl which one
e~rld Or the coil spring 21 is hung for an engage1l1en-t there-
bet~reen, wherel~y i t is ensured that ro-tational moven1ent
~O of the crank 1nellll)er 11~ is sn1ootllly converted iIltO reciprocative
move111eilt 'of th( coil spring ~1.
l`lle n~o~ Lillg ol` tlle L)ell SOUn~l generati11g SYStem in
accord~l-lce wiLIl l;lle rir~t ellll~Odil~eLIt Or tl~e invellt:ion is
e L~L`ec tecl in SUCil a 111arlller as illustrated iil Fig. 6 . Narrlely,
~_$ the l)aSe I~C).lL`~i 15 i s ri;~;ed to the moullting c`rame 2 3 which
is in turn securc d to the l~ell gOl1g 24 at the cen-tral part
tl1ereol` so th~lt tile lla1l1111er 20 :is located i11 place agaiIlst
the inner wall oL` the ~)el1 gong 24 so as l;o i111part t;he
Opti111U111 s tril;i llg 111otioll there to .
-- 8 ~
. . .
''
:
,. . . :
J~5~0
'\l o ~ ' L'. ~ " ~, r (I ~: i. v ~ -, L ~ s o ~ (i C~ e r ~ t illg
syste~ a(,~ tl,- 1`irs t elnl~o(lilllellt of -tlle
.lnl~ociimcrlt ~i l.,l b(~ dl:scr:ibe(,l below.
.~s tlle rll(~tO:L' ].1 15 s~rit(:l~c(l orl, tlle rOt.~.til1~ sllaE`t 1.
5 is rot~ltcd. ~rhell th(? Cl.'.~ C Illellll~c r ,1!~ on the circular clisc
13 turns about; tl~e rot~(l;iol1 sll,-,lft 12, wllereby the coil
sprin~ ~,1 is suL) jccted to r(,ciprocative movemeI1t. Since
the other en(I of the co il spL~ g 21 is engagecl to the free
end Of the 1eal SI~r~ r 18, s.~i c1 reciproc~ tive movell1ent of
l() the coil spril1g 2,L is tr.l1 s1`erred -to tl1e lea1` spr'ing 18
in the forl11 ol` vil~r~tive movel!1ellt;, whicll causes tlle hallllner
20 to be displace(i ~gaillst the inIler wall of the bell gong
24. Thus the re(luired bell souncl is generated.
In tllis cc~r1llectioll it is to be noted tllclt saic1 coil
1 spring 21 cllld ,LeaL` sl~ril1,r 18 are effec tive in absorL ing
hamn1ering imp.lc t to so11le eY tent, wllicll is c;lused as the
ham11le~ 20 stril~es agaillst tln~ bell gong 24 as well as iIl
main-tainillg -the a1`oresaid hall1meriIlg effect ~or the pre-
determined perio-1 Or time to ensure the enlarged volume
20 of bell souncl. l~`urtller it is recogI-1ized that -this advan-
tageous effec t is lit tle brought meI ely by mealls of the leaf
spring l8 ancl tl~a l; the sallle :i s alllpliried by way Or cooperation
of'-the leaf s~)ring l8 wi-tl1 the coil spring 21. Addi-tionally,
owing to t}lé fact tha,t the resilient f`orce of the coil spring
25 ~l alld the lo;ll` sl~rillg 18 is addecl to the halllll1ering move-
nent of the harllll1cer 20 toward the bell gOllg 24, i-t is
ensurecl thclt 1;11e wo1kir1g s-trolce ol~ tlle hl1ll1ller 20 is sub-
s tantic~lly incre;~se~l.
9 _
.. ~
': ; ,, '
- '
. .
.
~35~C~
.\'o,~-t~ tb(` Ill()~;OL' (I~`:iV( ~I .)( L ~. SOUII(.I ~o~ ating -ystern
ill aCC~Ord.lllCe ~,lit~ ;eCOll(.i enlbO(.I:illlCrlt oL` tlle illven-tion
~iL1 be descr:Lbe~ it;ll ret`erellce to ~ig. 7 to 9,
In -the ~r-~inf,s til(~ rer.rence nulrlera1 111 denotes a
n~otor, oL` wllicll rot.-ltillg sl-lal`t 1l2 is pro~-icled ~ich a
circular cl:isc IL3 lli,.`,ill,~, .an :i.ntCglal cranl~ melTIl)er 114
located ~TI arl eccelll;ric pOSitiOll thcrefl-om. Sai~ motor 111
is secured to tlle nlo~lllt:irlg p1ate 116 ~llicll i5 formccl by
belldill,g Up .1 Cllt ~OL`t:i.OII Or` I;lle bas( bo~rcl 115. Irl the
10 IllCaIltillle', suppor.~l; lnClllbCI`S 11'1' wh-icll are f`ormed by bendillg
up a cut port ion Or thc b,~se board 115 ill the same manner
are provided ~ith arl openillg 118 in tlle center thereof
respectively, througll whicil a halllrner 119 is supporced
clisplaceab1y irl tlle for~ard and baclcward direc-tions. ~s
apparellt from the clrrl~ lgs, the llead of the hammer 120 is
so dime3lsiolle~l tllrlt it has an ou-ter cliameter larger -than
the inner clianlet(r oL s.licl opening 11o so that -the hamrller
120 does by no IlleallS esc.lpe out of the support member 117.
A coil spring 121 is provided, wllicll is corll-lected to the
2~ cranl; nlelllber 114 at one encl thereof and -to tlle tail portion
122 o~` the hall~ er 119 a-t the other end thereof. Tlle
en~.lgelllerlt of the crarll{lllelllber 114 to the coil spring 121
is SUC31 -tha-t 1;he 1at~er is 1Oose1y hung on the former,
~llere~y tlle ro-t~tiona1 moverllerl-t of the crank member 114 is
.''5 snlootlliy converted.i31to tJle recil~rocative nlovelrlerlt of` tlle
coil sprillg 121.
Tlle moulltillg of tlle be11 soun(l gerlercll,iol-l sys-tem in
accor~lallce witll tho secollcl e~ ocl:illlellt of tlle inver]tioll is
:
: -- ~ O --
. '''
55~ -
- el`L`~ct~ ( r ~ L ~ tJ ~ t~?(l ir~ ~ ig. 9 .
~;~-IIIC`ly, t~le l)aS(! boar(l 115 is ~ ed to tlle moullting frame
1~ wllic~l is ill t;UI~II s~cuL~i?(l -to tll~ l~ell gOIl~ lZ~i a-t the
cerltral ~ rt tl~ereof. 'I`llus ~be l~a~ (r 120 is loca-ted in
place agaillst tll( illllOL' s:ide ~all ol` tlle boL1 gonOr 124
so as to ellsure tllu ol)i;iln~ sLril~i,lg lllo-tiorl by means of said
halTuner 1~0.
~ow operatioll Or tlle IIIO~OI dIiverl bell soullcl gellerating
systelll in aC(,OL`d.:lllCC W:i.til t~le secol-d elnbocliment of the
1() inverltioll will be dc,~ L il)e~l r~elow.
As the ulotor lll is switclled on, tlle rota-ting sllaft
112 is rotated. Tl-len tlle cral-~{ n~enlL)er 114 OIl the circular
clisc 113 turns abollt tlle rotatirlg shart 1]2, whereby the
coil sprillg 1'l is subjectecl to reciprocative ~novement.
l~ Since tlle otlleL~ ell(l Or the coil sprinCc,r 121 is connected to
the -tail portioll O r tl-le hallllner 119 whicll is e~Ytended
throuOIl the opellings llc~ of tlle suppor-t members 117 and
suppor-ted tllereby clisplaceat)ly in tl~e forward and bacl~ward
directions, the llallllller is reciprocatively displaced toward
or away frou- tlle bell gong 1~ so tllat the required bell
sound is genelated.
Ill this corl~lectLoll it is -to be rlo1;ed that said coil
sprillg 1~1 is errective irl absorbirl~ -the halllmeriIlg ilnpact
to some e~tent, ~llicll is caused as tile llalnmer 119 strikes
~5 against tile boLl gOllg 1,_~l as ~ell as ill maillta:ir~ O the
above clescribed llalllllleri~ r ef`fuc-t for the predu-terlTIil-ed
period of tin~e to CIISUl`C' tlle el~ r~Jed voLull1o Or bell souncl.
- ~`ur-t}ler :it is to L)e aclded t~lat ow:ir;~,r to tlle f.~ct tl-lat
-- 11 -- ,
- ' ~
--
tllc~ r~ ) L ` ( ` O ~, L i l l e ~ S ~ r 1. 2 1 :i S a ~ .1 t O t 11 CI
l1al1lil1e~ mOVClllell~ Ol t;l1e l1alll;ler 119 towar(i -tl~e be.11 gong
i24, tile wc).rl~iillg strokc ol` tlle l-lallllller 119 ca~l be substantially
lengtllerlc?d. To e~ l,)le l;lle ~IL'c~rcs.lid l~ lerin~r effect ancl
~ile worhillg s1,rolcc oL' t,llc ~l.alllrller l]~ co be acljuste(l as
required, allo~lc.r coil sl)r:ill~,-ll1ay ~e arrallged abou~ the
cylindri&al bocly oL` ~]lC ll~lnlller 119 betweerl the head portion
120 and one of tlle~ suppc)rt merllbers 117.
lNe.~t, tlle Illotor (lriverl bell soulld geneIatirlg system
in accordallce ~v-itJl the thir(:l erllbodirllerlt of the invention
will be clescribed ~it;il referellce -to l~`ig. 10 to 13.
In tLle ckn,lwillgs -tlle rererence nulnerals 211 deno~es
a motor, of ~1l1CII rot,ltirlg shaf`t 212 is pro-vided with a
ratchet wlleel 2l3 i.s f`ornlecl with a pluLality of ratches 214
whicll e~tencl 1`rOIIl tlle Cer1ter~ Of rotatioll in the radial direction,
so that the rar~cllc!s 21~ conle in interlnittell-t engagement with
tlle ben-t portion of` a leaf spring wllich will be described la-te~.
Particularly the sanle nunlber of engL-Igerllell-ts as that o:f said
radial ra-tches 214 (three in number in -this :illustrated
elnboclillleilt) are el`fected during one rotatiosl of the rotating
S11af t 212 to drive the leaf spring. Tlle rnotor 21.1 is
sec-lrely fas-tellecl to the molllltirlg plate 216 wllicll is formed
by be~ g up a c~lt PO1`tiO11 oL`-tlle base board 215. Said
:Leaf spring 21~ is fi.~ecl a-t its one encl to another mounting
.'5 pl,lte 217 whicll is f'orlrlecl in the sanle nlallrler as saicl mountillg
plate 21~ witll ~lle .l:id oL` eyelc,~t OL' the like, wllile the
Otller ellCI of tlle leaL' sprillg ,"1~ i.s kcpt .f`ree. Til:i.s leaf
SPring 21~ is as illllst:rLIte~,l in Fi~,r. 12. Tlle leaf spring
-- :1.2 --
~ .
.
35~
(i i 11 ; s t r; I~ ~j f` Le I f sl)r i llg mat~ l i a1
to tl-le l`o~ S illllsl ~al.e~ tlle :Ir ~ , ancl is formed
witll lloles ' '0 tllrou,~ icll Cyl~Lec '19 or the like
eYte~ lICI (~110 tll(.`l' 1l(.) l.(' ' '? ~ ,r ~ a l~ lrl~ r
5 2'1 is li:;e l tlleret~ ( reas .1~ tl~e fIee e~ of sai(l leaf
-prirl,, '1~ is l~l~ovid{~l all ell,~a~ellleIlc portioll 223 wllLcll is
formed ~3y beIlding the eYtL~enle end thereof` in the upward
direc t;iOIl. This erlg ~ge~ lt por-t ion 223 is loca-ted so as
to colne in eng~lgelllerl~ ~ itl~ tlle ratcl~e~ 21~ oI the ratchet
lO wlleel 213.
It sllould bc ull~leL s-tood tha-t tlle aforesaid ratchet
wheel 213 isIlt t be lilllitecl ollly -to the stIucture as
illustrated in tl-le d~ /ings and that the same may be replaced
~ith arlother dri villg wlleel or arrangement which is
15 constructed, for ills taIlce ~ in such a manner that a main gear
wll~?el is moullte(l orl t;lre rotation shaft 212 and a pilliOIl is
arran~,ed in engagelllell-t Witll ~;aid maiIl geaL wlleel, said
pinion being forllled with radially eYtending ratcll ~neans on
the outer peri pllery thereof in the same way as the r adial
O ratchei 214 on tile ra tcllet wlleel 213. ln tllis modified
embodilllen-t it is possible -to ad jus t -the nunlber of bell striking
operatiorls pe~r Ullit time by way of adjus-tirl~ the ratio of
rotation nlllllbers Or -tlle maiIl gear wlleel and pinion, ins-tead
of -tlle speed controller for the motor, which is intencled to
;~5 ~l just tlle nulrlber Or bel L s-tril~ing operatiorIs.
1`he Inoulltin~ of tlle be11 sound generai;ing systern in
ac cordiI~ wi t;ll tll~ tl~ rllb(J(Ii ~ ?Il t of tll~? iIIverl til~ll is
efreCted ill tlll' Salll(' Illallller as the prece(liIlg elrlbodilllents.
- 13 -
,-s illaiscr;~ted .ill L~ ,. L3, ~ .se 1,oarcl 215 i.s .f`i..~e~l to
the moUIltillg plll te 2)!l wllicl~ lS ill tUrrL se~ured to the
bell gorlg 225 at tlle ce~ art th~reof. ~ow tlle hllmmer
221 :is reacl~ to stri.lic .l,,r~in~t the ~e:Ll gon~r 225.
(~p~ t:iO~ of:` tLIe 11101;01~ ivell L)e11 souncl generating
systelll in accorclallce w-itll tlle thircl elnbodime}lG oL` Ihe
inventio;l will ~ clescril)ed below.
~s the nlotor 211 is ~switcllecl o~l, the roGation sllaft
212 is ro~ated cogetllc~ ith tlle ratclle-t ~heel 213 secured
tllereto. Then I 1l(? rilcliaL ratcllet 211~ OIl tlle ratchet ~ eel
213 comes in enC~ gerrlent with the u~ arcl bent portioll of
tlle leaf spring 218, causing said lear spring 218 to be
displaced to tlle l.e.rt as seen in Fig. 11 and 13. When the
ratche t 213 is cl:ise~ agecl f:rolll the bent portion 223 as the
1~ motor is f-lrtller rot.lteL, -t]le leaf sp:ring 218 is repulsed
to the right clue to -tlle .resilient force tllereof. ~s a
result tl-le h.:lnllller 221 secured to the encl portioll of the
leaf spring 218 periotllls strilcingr operation against tlle
~ell gong 22~ ter colllpletioll of strikingr opera-tion -the
leaf spring 210 is restorecl to -the origina.l pOsitioll so
tllat i~ is rea(ly fo.r ne~t operation. ~s the motor continues
to be rotated, slrikirlg oL)eratiolls are repeatecL in -the
above describe(t III.-IIIICl'.
In this collllectioll it iS to be not;e(i that saict leaf
'5 spring, 21~ is efi`ect:i.ve in .~bsorbillg the hallllllerill6r inl~act
CO SOII~e e~tellt, whi Cll :iS C.lUSeCI as the hallllller 221 slrikcs
agaill.sc tlle belL gollg 225 a:j weLl as ikllrlrli.ncail-lillg, tlle
above descri1-ed llalllnleLillg efL`ect for cerl,aill period of`
_ 14 _
'
I~Lr tllC`I` i t lS to l~c o(l(ie(l tl~ L ~ t~(` al`orcsai~ leaf springr
210 m~;es :i~ possil)l( to lengt}lcll tlle wo1-killg str~ e of
I ll e h .~
~ t, tllO nlOtOl (lr`l~ ~ n 1~<`11 so~,uld g(rlor.ltillgr system
ill aCCOI`dallCe W.i tll tln I`ourtll e IllbOdilllellt Of the i nvention
will be,cLoscri~ecl ~ il ro~ rellce to Fig. 14 -to lG. As
described abo~e, the nlo~or clriven bell SOllllCI generatillg
Systelll ill accot.~cl InC( Witll ti~( respective prece(ling
0 enlbOCIilllelltS COIlS:i.StS :il~ that l-larn~rlerirlg operatiorls are
perforllled by W.ly of rociprocative nloverrlell-t of` the halnlller
means wllicll is ellergized by a mo to:r. To the contrary the
motor driven bell soull(i genera-tirlg system in accordance with
the fourth enll)o(lilllellt oL` the invention consis-ts in that bell
SOUlld iS grellel lteCI ill such a nlanrler -that rotational rnovement
of a motor is converted into turning nlovenlerlt of a llalllrller
arm via a recluction gearing so tlla-t a hanlrller Irleans on tile
outer end portion of -tlle llalrlmer arm strikes against the
protruded portion of`-the bell gong.
In ~lle drc~ in~,r the refererlce nulneral 311 dellotes a
notor, of which rotatioll shat`t 312 is provi,decl wi1,h a worm
~rear 3L3 securecl -I;hereto at the e.~-trellle end thereof. On a
vertically e~tencl:illg shclft 315 i.s .ar~ -lged a worm wheel
31LI iII ellg.lgelnellt with saicl wornl gear 313 ancl further on
.'-'5 the top en(l oL` sai~ shaf'-t 315 is arrarlged an arm 31G wllich.
e~tencls in tllo lloriz,ollt.:ll clirec tion. Sclicl arm 316 is
~ref(?raL)ly Inade of rosiJiellt Wi:L`e nlat;eL~ial sucll as piano wire.
Tllo llL'III 31G is l~Lov:icle~l wi,tlL ~ ICL~ 317 ~cuLe{l to tlle
-- .1S
- ~u~er clll,l tl~oLeoL`. I~X illlls~L~t,ecl in Fif,r. 1'~, all conlpol-lencs
of -tlle bcll sol,u~l goller.~t;illg sys~e~ re tiglltly mourl-ted to -the
support plate ~ icll is in turn is secured to the ~ell gong
320 witll tlle aid ol` a bolt ~ . 0l~ tlle inner ~all of the
bell gOIlg 3'~0 is rorllle(l a ~rO trusiou 321 wllich pro~rucles
inwards :in t~le rcl(lia,l dilectioll, agLinst wllich the top end
of the ~a~ ner 31~ :is locate~i to ilnpart striking effect.
~ ow OpeI.ItiOll Or tl-le motor drivell bell sound generating
systelll in accol~ llcc w,ith -tlle rour~h enlboLi:illlerlt o~` the
illverltioll will bc dcscl~ibed ~elo-~.
As tlle Ino tOI' is switclled on, tlle rota~ion shaft 312
is rotated togetller witll tlle worm gear 313 secured thereto.
'. The ro-tational movelllellt of tlle worm gear 313 is transferred
to the worll- wheel 314, w)lereby the arnl 316 secured to the
'`' worm wheel 3,L4 turlls, causillg -tlle llamlller 317 on the e~treme
end of the arlll 317 to strike agairlst tlle protrusion 321 on
the inl-ler walL of tlle bell g~,ng so as to generate the
;~ requirecl bell soullcl. One rotatiorl of tile worm wheel
'~ proc-luces one hamlllerirlg activity.
It will ~e reacli]y understood that by W.ly of adjus-ting
the gear reductioll r Lti(> of the WOI`III gear 313 arld worm wheel
314, tlle magnitu(le Or s-trilcing efrect by tlle llcallllller or the
heigl-l-t of the protrusioll 321 the qua:Lity and volulne of bell
sound:illg carl be e~as:ily controlled.
In the enlbo(lil;lellt .-s illus-trated in F,ig. 14 and 15,
resilielLt wire 111.1 terial, is used for the ~lallllller arm 316.
~lternatively tlle il.lllllllOL' aL'III 316 m.Ly be constIuctecl of a
coil spring instea~l of tlle solid wire nlcLtelial, as
_ J6 -
,
o
illustra~ l`ig. I(~ o i~refer-~d~le, bec;luso a
coil SpL`lllg ilils flo~ Lity ll,igilcr t~ -tllal; of a solid
wire, resultil]g ill loss ~)ossibilitv Or breah~-Lge Or tlle
han~ er arlll cal~se(l duo to nla~,eri.ll f.li,igue as well as in
pleasallt be:l,l soundill~,r ~-/Lvd~lc~d.
l`~e,~t, t,he Illoi,or (Ir,ivo~l l)eLl sourld gen~rati,rlg system
in accor,dallce wi.tll ~llo l`l~`tll elnboclimerlt of ~lle inventior
will be describccl Wit~l ref~rellce to I~ig. 17 and lS.
In tlle (lrawLIlgs l,lle ref`orence numeral 4il deno~es a
motor, of wl-licll rOi,.ll;iOI~ Sh<~rt 412 is provided with a worm
gear 413 secured ~lereto at the e.~rellle encl thereof. On
the ver-tical,ly e.~-tenclil~g s}laft Lil5 is arrange{l a worm wheel
414 iIl engagelllellt wi,tll said WOLIll gear ~il3. Said worm wheel
41L~ is proviclo(:l w,itll a clriving pin 416 on the upper surface
thereof, said drivillg pi,n L~l~ boillg i,ocatecl in eccentricity
frolll the~ ro-tatioll sliaft Ll15 ol' tl-le worlll wlleel 414. ~s
apparent fronl the dr.lwillgs, tlle driving pin 416 is in
el-lgagelllellt with tho hool; pO:rtiOIl 4,L9 of a swing arm ~17
within the slit 423 e.~tending -through said hoo~ portion
419, saicL swillg arm l~l7 being suppor-tod in a swingillg
nlanner ai~out -tl-le ver-~ical shaft ~17 located substantially
in tho center of the boll gOIlg 421. On the bo-th ends of
the arm ITIelnber ~lc ill tlle rOrnl O.r t~in arm aro provicled
hallllllers 420 securecl l,]lereto~ while on tllo inner wall of
2S the bell gong 4'-'1 are provided l~ro-trusioils 422 ~hicll e~-tend
inwards i.n tlle racl:ial diroct:ioll~ s.lid protrus:i.ons ~i22 bo:ing
loca~ocl at -tlle l~re(letoJ:~ illod d:istanco rronl tlle llal~lers 420,
Now oporation of tllo nlOtor drivell ~e.ll soullcl gerleratirlg
- 17 -
. .
- svste~ ccoldallcc ~ i tll t 11l: I`il`tl-l lnlbodilllent of t~ile
inventiOn wi,LL bc dcscril~c(.i l)elow,
As the IllOl~OI` ~ i.s sWit:.CIleCI Oll, the I`OtatiOrl sllaft
412 is ro Ga~(~(l toge tller wi. t;ll the worril gear 1~13 seeured to
5 -the end E)ortiOI~ tllereol`. Tlle rotatiollL1 In~ elllent of the
~;orm ge.l.r L113 :i s tr(nlsreI~:red co the worlll wlleel 1ll4, causing
tlle sa~ne to be ro ta ~ecl . 'l`llu s the driving pin 416 on the
worm wlleel 4lL~ is clisplilcecl ..long tlle eireu1ar tr.lclc7 of
wlliell radius is e(~ l to tlle eecentricity frolll the rotatio
shaf t 415 . ~s t;he (.Ir.i ving pill L~16 perl'orllls c:ircular move-
mellt , tlle arm nlelllber ~ i s sub jec ted to swingillg rnovelllent
about the suppo.rt sh.~f`-t ll17 via the hool~ portion 419, whereby
tlle hamlllers 420 0ll the botll encls of the arm member 418
strike ag.liIIs t tlle E)ro trusiolls 422 o.t` -the bel.l gong 421.
rllus tlle requi.recl bell SOUlld is proclueecl.
It will be rea(lily unders tood that by way of ad justing
tlle gear rccluetioll raLio Or -tlle worln gear and worrll wlleel
as well as tlle eceelltri.ei ty of the drivillg pin the quality
and volume of bell souncliIIg ec~n be e~sily eontrollecl.
2`0 Finally, tlle nlotor drivell bell sound generating system
iIl accordance w itll tlle si.Y tll embodilllerlt of the invention will
be described wi tl~ rel`erellce -to Fi~,r. 19 allcl 20.
In the drawillg,s the referellee nullleral 511 deno tes a
nlotor, of wllicll rotation shaf`t 512 is provicled with a worm
gear 513 secure(l tllereto at the e~{tren~e end por-tion therec)f.
0n the ver-tieally e.~tending shat`-t 515 clisposed on the base
board (not sllowll) is rc)t.ltab.Ly .arrail~,e(:l a worlll wlleel 51Li
in engagrerllellt wi tll sa:id WOI`IIl gear 5:13.
.
. ~ .
-
()11 tlu~ )(?.1` 51.1:1` ''~1(,~` o ~ 1(? WO:rlll Wlleel 514 is provided
a VCrt:iC.llly ~ t(?lldll~g eng~lgcllle~lt; pin 516 located in
eCC1311t``iCity frOIII tlle` L'Otat:iOil sl-~a~'t tllereor, saicl engaging
pin CO~ g in enga~.rclllcnt wi.t;ll the lever merllb(3r 519 within
the lollgl~r slil 5'~ tll~3.L~?o.f, wll:ich is adcpt~cl to swillg
abou~ the supl~orl; ~ha.L't 51~ vcrtic.Llly disposed in the
vicinity~ of tllc bcll goll~,r 5'7. On t~le opposite side to
said longer slit 520 :is provided a vertically e~tending
driving pin 52,~ icll C0111C5 in engagenlc3nt wi-th -the lever
10 mc?lllber 519 witll,ill the shor-tc.[ sli-t 521 thereof, said driving
pin 523 being fi~ccl to the llallullerillg rod 522 e,~ac-tly at
the center theleo.r,
Tlle hall~llering rod 522 is reciprocatively displaceable
in the both directions~ being supportecl by the support
; 15 plates 524 on the b~lse board (not shown), On the both
ends of tlle llal~ (3lillg rod 522 are arr.lnge{lllanlmers 526
secured thereto via co:il springs 525. The lengtil of the
hamlller 52~3 i~ dilllensioned so that the harlllTIer 526 is loca~ed
at the optilnulll distance fronl the inner wall of the bell
20 gong 526.
~ow operation of the 1110 tor driven bell sound generating
~ystcnl in accordarlce ~ith the si~th embodilllellt of the
invelltion ~il.l be describ(3d below.
~ the nloi;or 511 is switclled on, the rotation sllaft
25 512 is rota-tecl togcl.llcr wi-th tile worm gear 513 secured
thereto at the e.~trelll(3 ellcl thereo.f. Th(3 rota-tion of -the
~;ornl gear 513 is trallsrerrec~ to til(3 worm ~Il(3el 51l~, causing
said ~orm ~ c~?l 5:L4 to be~ rotate(,l, wllerel~y the engagelTIent
- 19 -
.
5~
~>ilL 5l() ~i('L`~ n:. (`.i.~'('l,ll,lL' 1110~ , alor~g t,l~e ~re~le1,errrlirlecl
track oL Jl~lcll rldills is e(lu.ll to ~;lle eCCerl~riCity thereof
from the su~-port sl~aLI; 515. ,~s t;l~( enf~a,~ell~cnt pin 51G
turns, tllr? levcr Irle~ )eL 5l~ s~villt,s a~out the supporl shaft
517, w}lel-el~ t,llc ~Irivil-l,, pin ,~'-'3 is reciproc.lti-vc?ly clisplaced,
WlliCh COIneS .Ln Cll,',a~.;('lllC`~It ~'itl~:ill thl:` sllOrter slit 521 of
said 1ev,er nlelllL)el 5l~,) Tl~us tlle h.~lllnerillg rod 522 is
operate~l by IIIC?<~IIS of ~he drivillg pin 523 so -t]ha~ the hamlners
5~6 stril;e aglir~st t,l~ ner ~al] ol t~lC? bell gOllg 527, ~s
~,~?- a result tl~e re~luirc~l bell sourld is g,erleratecl.
I~ ~ill bc rcacli1y understood that by acdjus-ting -the
gear recluction r-l;io of -the ~orm gear and ~vorm wheel as
we11 as tlle eccelltricity of -the both pins the quality and
vo1ume of bell soul-lcling carl be colltrolled in the same manner
as tlle prece~ing elllbodilllellts
~ s clescribecl a~ove, tlile nlotor drivell bell sound generating
system in accord~llce ~ith tlle presellt inverltion has an
a~vantageous le.lture ~llat it is simple in structure and
acljustable in generatillg -tlhe required bell sound ~loreover
it has the fol10~illg adclitiolla1 fcatures
~ a) It is possib1e to ad~just tlle nunlber of hamlnering
operatiolls per,unit tinle c.ausecl by striking activities of
t~le ha~ ner, as recluirccl, by ~ay oi acljusting the nulllber of
rotatioll of tlle nloi;or~ the gear recluction ratio of tlle 1110 tor
~5 or tlle eccentricit~ oL` the driving pin an-l/or engagement
pirl so that tlle nl~ er of`llallllrlering opercltiorls is ensured
for tlle Illa,';:illll,llll vol,l~ c ol` bel..L soulldirl~,r.
(b) I-t is l)ossible to ellsuIe tlle optilnullll)eriocl of tirne
- 20 -
i
. .
L~ cil)~ ~fr.~ lst tll~ b~.LL ~orlg
by wa) Ul` selec~;iv~ etcr~ ing tll~ spring constanc of
the coil aprlng ~ d/()l' IC~Il' sl~riJlg,
(c) It; :is possil~ r to lellfl;llerl -tlle worlcing stroke of'
S llamlllerillg O~e-~e;lt:i.oll by \~ay u~ a.ru-anf,irlt a leaf sprillf~ and/or
coil sp.l'illt,'. ~IOI'(`OVC:L' it ia possi~1e to subs-tarltia11y
1engthell.tlle wollc:irlg l.ife of tile beil sound generating
system o~ing to -t~le facl that the e~cessive ha~nJnering force
inlparted agaillst tlle IJel:l. gorlt- l)y tlle halnrrler can bc a~sorbed
by -tlle dulllpillfr l'l.~nct~oll of the spring n~earls.
(cl) I-t is possible to operate tlle be11 sound gerlerating
system in less e1ectrica.L po~er sulnption -tllan the conventional
e1ectromagrletic ~riverl bel1 souncl genera-ting system.
Tllc nlotoL~ iverl bell soui~d generating system has
been clescribe(l w.itll respect to tlle six prel'erred errlbodimerlts
ol tlle preseilt inve~ltioll, as described above, It shou1d be
~f course understoo(l t,~ t the presen-t invelltion isn~t 1imited
on1y to tllese prererrccl enlbo-l:irrlellts but i t may be modified
or cllallged ~ithout any depar~uIe rrolrl t~le s~irit of the
illV(~lltiOII.
