US1937134A - Alarm mechanism - Google Patents

Description

Nov. 28, 1933. s w STOU-r 1,937,134

" ALARM MECHANISM Filed oct. 8, 1952 Patented Nov. 28, 1933 ,1,937,134 ALARM MEOHANISM v Stanley W. Stout, Flint, Mich., assigner of onefourthto Josie McKay Gordon, Flint, Mich.

'Application oeteber s, i932.' serial Nt. 636,801

v s claimt.4 (o1. 11e-9.14)

usually being a window or Vdoor of a dwelling or` 5, the like-' It is the primary object of this invention to" provide a control mechanism for an alarm which is operated by a lcord'or the like secured tothe object, upon movement of Awhich detection isy de, sired, capable ofv sounding analarm upon cut-y ting or movement of the cord in either direction. vAnother object of this invention is to provide yan alarm in the form of-r a bell or gong which will not be mistaken for the usual alarm of theV telephone, door bell or alarm clock.

' .These and other lobjects and advantages will appear 4as the descriptioriv proceeds. It is to be clearly understood, however, that I do not desire to be restricted to the exact details shown and described, but intend to include as part' of myinvention, all such ychanges and modifications whichfwould roccur to thosel skilled in the art and fall within the scope 'of the appended'claims.

In the drawing wherein a preferred embodiment of my inventionl is shown, Y Fig. l is a plan view of the gong operating and control mechanism taken von line 1-1 of Fig. 2 with the bearing plate 4 removed.'V

Fig. 2 is a side elevational view of thergong operating. and control mechanism; .thev cover being shown removed along the longitudinalcenter line. n y

' Fig. 3 is a detailed view -1 of the control mechanism.,

Fig. 4 is a bottom view of the bell gong detached from itsmounting.

Fig. 5 is a detailed view of the hammer.

Fig. 6 is a detailed View of the bracket empioyed to retain the .spring case in position.

With reference tothe drawing, in Figs. 1 and 2 is shown a base member 1' of sufiicient weight to oder considerable resistance to movement in a horizontal direction. An inverted disk shape cover portion 2 is removably secured to the base 1 Yby vscrews 3 or the like. A bearing plate 4 is ijlxedly spaced from the .upper face of the base 1 by posts 5 threadedly secured in the base 1. A

shaft 6, having a square end 7` to receive a windy ing, key inserted through the ,opening 8 of the The usual spring motor (not shown) has one end attached to the shaft 6 and theother end attached f to the inside of the spring case 11 suspended from the plate Lland prevented from rotating by the .mer 24 is. adaptedto` Contact upon rotation.y

l37 supported. in the 'block 30 for longitudinal brackets 12. The large main gear '13 lisiorfisely mounted on the shaft 6 and vadapte-.ci te bedrive in one direction by pawl'and ratchet connectin (not shown)V jwiththe spring driven shaft 6.'f The gear l'maybe spaced from the base 1 by a wash-J .60( er 14 or thelike'. i j` The gear 13Zmeshes with a 'pinion v15 on 'al shaft 15l which in turn carries a gear V16.` Like wise, the gear"16 meshes with a pinion `17 on the shaft laand drives a gear .19"` meaning w'itrf a 65 i pinion 20 xedlyfsecured to the hollow shaft The shaft 21 is journaled upon a post 22 thread; edly secured in the base l1 andadapt'ed to sup port a bell or gong 23 screwedtothe upper end. f

A hammer member 24 preferably formed from -70 a helical coil, with a` solid tip'25, is anchored in a collar member 26 `which is clamped to the holev g low shaft 21. The gong orbell 23 is provided with a plurality of ns 27 with which theh'am-i 75 A circular plate 28is fixedly securedtothe lower end rof thev shaft 21 and'is adapted torotate therewith. vOne orrmore'stoplu'gs29 ,are provided upon the periphery' andfproj ectv into 'the path of a sutiable pin te eontro1theseundmgef 00` the alarmv as' will be hereir'iafterv described.

f VThe alarm control mechanism consists of a bearing block 30 secured to the base 1 byfany suitable means. The block 30 hasan overhanging shoulder 31 which acts as a'b'ea'ring for' the operating member 32 having a horizontal pora tion 33. y Acam 34 is aiixed to thelower end of member 32 .and hasv a flat face portion 35 whichk abuts ak sliding cam follower 36 securedto a pinmovement.V .As shown in Fig. 1 the outer end' of the'l pin 37 is in the path ef the lugs'zs and prevents the rotation of the shaft 21-tojsound the alarm.A In order tolock the pin 37 inthe position shown, a vertical shaft 38 is rotatably jour'- naled in the base 1 and the cover 2. A cam 39 is affixed to the lower end of the shaft 38 and contacts with the follower 36 to lock the pin 37 t in the-outward position as shown in Fig. 1,. -A handle 40 of any suitable constructionis prov vided atthe upper end ofthe shaft. 38 Vto selectively position the cam 39.v

A spring40 is secured atV oneendto a post' 41 and at therother end to the armI 33. As shown in Fig. 1, the spring 40 'is underV tension tending vto rotate the shaft 32 and cam 34 but is prevented from doing so byy the locking cam 39. A cord 42 or. the like is also secured to the other end of thev arm 33 and is adapted'to besecured to 1'10 4 Pix.:

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some object, the movement of which is to be detected. f Y

The'operation of the above described mechanism is as follows: With the locking cam 39 in the position shown in Fig. 1, energy is stored up inthe spring mechanism in the usual mariner.'v The `cord 42 is then secured to the object,

the movement of Vwhich is to bedetected, for

example. a door,4 window, etc., andthe entire alarm mechanism is moved longitudinaliy of the cord Yupona'supporting surface for the base Yl until the cord is taut, The handle 40 is then rotated to remove thecain 39 from theY follower 36, Under this condition, thejtensioned spring 40 is tending to rotate the arm133 and cam 34 but is prevented fromdoing soby the resistance ofthe cord 42; the weightofgthebase land supported mechanism being sufficient to overcome' sliding of the same upon the supporting surfacel under the stressl `of the spring Ii() upon'tne .post

411" With the alarm mechanism'in a'set conditionany movement 'of the cord in either direction ortho cutting ofthe cord will' result in the rotation of theshaft32 and camil'in one directionorl the other.` "Thusit will be apparentithat thecam'fl, in contact with the followerlSS, will moveth'e follower 36in' the directionv of the .cam to remove the Vpin 37 'from thepath vofthe 1ugj,29'.' With` the plate' 28 free Ato rotate, the shaft A2l and hammerZe willfbe rotated 1 at a highspeed to'sound a'high pitch alarm'unmistakably distinguishable from the usual telephone andclock alarm'. K Obviously, any otherj well known source of energy may be employed to rotate the shaft carrying the hammer 24. 1Ecr example, I, anticipate theerxployment of my alarm' control mechanism in j combination withan alarm clock. Likewise,

. ther movement of the pin'l could lbe employed to make or breakan 'electric circuit when the gong hammer is ^electrically driven'. Regardless. of the typeof hammernoperating mechanism, my

invention primarilyresides in a compact,'portae` blfalarm mechanism A'having an alarm control which will sound an Aalarm upon release or movement inf'either Vclirec'tion of the member transmittingthe movement ofV the object being detected. u i l as new and desire toprotect by Letters Patent is: 1. In analarm ofA thertype to be soundedupon movement of an object, the Acombination with a gong, of'a motor driven hammer for .said gong, means rendering the` alarm inoperative in one position, 'a control member operatively associated with said means, means urging saidjmember in one direction to render the alarm operative, a cord secured to said member to move the same inthe other direction to render the alarm operative and adapted'to be connected to the object, said cord underk determined tautness 'positioning Vsaid control with said first means in thefposi- Ation rendering said alarm means associated `with said first means locking said alarm lin `an inoperative position against inoperative, and

being rendered operative by said member by movement in either direction.

` 2..In an alarmof the type to be sounded upon movement of an object, the r, combination'with a f' gong, ofa motor drivenV hammer for said gong,

` vmeans rendering the alarm inoperative in one position vincluding V a camA follower', a control member having a cam, means urging said meme berY in one direction, ,a cord secured to said inember to movethe same in the other directfl and 'VI-layingv described-my invention .what I claimA adapted to be connected to the object, said cord under determined tautness positioning lsaid cam in an intermediate position, said cam being adapted to contact with said follower uponV movement in either direction from said int runediate position toV render the alarm operative.

, 3. In an alarm of the type to be sounded upon movement of van object, vthe combinationwith a gong, of a motor driven hammer for said gong, a pin for locking the hammer operating mechanism in an inoperative position a cam follower secured to said pin, a control member having a canna spring urging said member in onel direction, a cord secured tofsaid member to move the same in the other rdirection and adapted to be 'connected to the object, said cordlunder determined tautnessupositioning said cam in` an'intermediate position, said cam being adapted to Contact with said follower upon movement in yeither direction from said intermediate position Y to render the alarm operative. l

IV Il. In an alarm ofthe type toV be sounded upon movementof anv object, the combination with va gongfof a motordriven hammer for' said gong,

va rmember movable with said hammen-wa'pin supported for longitudinalmovement, coactingl with said member in oneposition to render the alarm inoperative a cam follower .secured'to said'r pin, a control member'having a cam, aixspring urging said member inY oneydirection, a cord ,se-f cured to said member to move the same inthe other direction and adaptedto be connected to the object, said cord" under determined ltaut-kness positioning said cam in an intermediateV position, said cam being adapted to contact'with' foo its

lit

said follower upon movement in either direction Y froml said intermediate positionV to render the d alarm operative.

5. In an alarm of the type to be sounded upon movementA of an objectfthe combinationwith a gong, of a motor driven hammer supported uponY a vertical shaft', a 4lug supported 'on said shaft,

afpin supported for longitudinal movement co'y contactwith said follower upon movement in' eithervdirectiony fromsaid intermediate position to render the alarm operative.

6. In an alarm of the type to be sounded upon ymovement of an object,V the combination with a gong, of .a motor driven hammer for said gong, means:v rendering the alarm inoperative in one position including a cam follower, a control member having agoam, ar spring urging said member in onedirection, a cord secured to said member to move the same in the other direction and adapted to be connected to the object', said cord under determined tautness positioning saidoam in an intermediate position, said cam being adapt- Ved to contact with said follower upon movement ineither direction "from saidfintermediate position to render the alarm operative, and aV selectively operatedfcam adapted to contactl with said follower to preventmovement of the same' to render the alarm operative. k K Y v 7. In ari alarm of the type describedgthe com,-

rit

iss

binaticn with a gong, of means for sounding said gong, means capable of rendering the alarm inoperative in one position, a control member having operative connections with said second means and capable of movement in `opposite directions,'

bination with a gong, of means for sounding said gong, means capable of rendering the alarm inoperative in one position, a control member hav- 'ing operative connectionswith said second means and capable of movement in opposite directions* said member only upon initial movement yin either direction moving said second means to an Y` ineffective position to sound the alarm, andmeans independent of said member solely capable ofV Y rendering said second means again effective.'

STANLEYH W. STOUT.

Y '85 fr

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