US1149199A - Tampering-preventing device for fire-alarm boxes. - Google Patents

Description

L-KAROLY.

TAMPERING PREVENTING DEVlCE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5- I915.

Patented Aug. 10,1915.

I a SHEETSSHEET 1.

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cohunmm PLANOGRAPH (IO-,WASHINOTON, I:v c.

J. KAROLY.

TAMPERING PREVENTING DEVICE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5. 1915.

1,149,199. Patented Aug. 10,1915.

3 SHEETS-SHEET 2.

d2 Karo g coLuMmA PLANOGRAPH C0., WASHINGTON, D. c.

J. KAROLY.

TAMPERING PREVENTING DEVICE FOR FIRE ALARM BOXES.

APPLICATION FILED APR. 5. 1915.

1,149,199. Patented Aug. 10, 1915;

3 SHEETS-SHEET 3'.

(LIE (Lima! COLUMBIA PLANODRAPH 60.,WA5HINOTON. D. c.

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3 JOHN KAROLY, OF CHICAGO, ILLINOIS.

TAMPERING-PREVENTING .DEVIGEFOB FIRE-ALARM BOXES.

Specification of Letters I atent. Patgntgdl Aug, it), 1915,

Application filed April 5, 1915. Serial No. 19,420..

To aZZ whom it may concern: I v

Be it known that I, JoI-IN KARonY, a sub]ec t of the King ofHungary, residing at Chlcago, in'the county of Cook and State of rive and'actuate the releasing mechanism.

The present invention is designed primarily to prevent tampering with fire alarm boxes and toprevent false alarms from being turned, the mechanism being arranged so as to hold the operator of the alarm system until a the department ofiicer arrives and the box being provided with such an attachment would render unfounded alarms impracticable. I p

A stillfurtherobject is to provide the fire alarm boxes of a city fire'department with looking meansen gaging the Wrist of a person who operates'the a'larmfbox, thus holdmg said person at'the box untll the fire department oiiicer arrives and aseertains the location of thefire, or in theevent that a false alarm has been turned in, an arrest is made of the person tampering with the alarm.

d/Viththese general objects in viewand others that wil l appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the appended claims. s s I 111 the drawings forming a' part or this application. and in which "like-designating characters refer to corresponding parts throughout the several views, Figurel is a vertical sectional viewtaken throughthe device upon line 1- 1 of Fig. 2 showing the elements in their normal set positions. Fig. 2 is a sectional view taken upon line Il.1r

of Fig. 1. Fig. 3 is a horizontal sectional view taken upon line III-III of Fig. 1, and Fig. 4 is an enlarged detail sectional view of one of the locking members in its sprung or arm-engaging position.

Referring more 111 detail to the drawings,

a hollow casing is provided for completely inelosmg the fire alarm box 11, the casing box belng mounted upon a permanent support wherever desired such as being secured to a post of a building. l he forward side 12 of the casing has a cylindrical sleeve 13 horizontally arranged therethrough, and being of suficientsize' to accommodate the arm of a man and to allow a person to insert his hand therethrough into'the casing 10 for the purpose of turning the key or switch 14: of the alarm box and thereby turning in the alarm. I

Arnrengaging feet 15 are provided upon the innerends or bars 16 which are longitudinally slidable within spaced brackets 17 and 18 within the casing 10, the said bars and feet being positioned throughoppositely arranged peripheral openings 19 in the col.- lar 13. A trip pin 20 is slidablyarranged within the bracket 18 and is normally pro: jected through an opening 21 in the bracket by means of a spring 22 carried by the bracket and so as to engage the adjacent face of thebar 16. When the bar l6is moved outwardly to the limit .of its movement, the foot 15 will fit within its respective opening 19, the edges of each foot and opening being inclined to correspond and thus providing an unbroken inner surface for the collar as shown in Figs. 1 and 2. When the bars are so positioned outwardly in their unlocked arrangement, the pins 20 will automatically enter the side notches '23 of the said bars, thus locking the bars in their normal posi-, tion. to each of the bars 15, and also to the adja cent brackets 17 as at 2-6 andwhereby as will be evident a releasing of the trip pin 20 from" the bar notch 23 allows its respective spring Bate force the bar feet 15-inwardly v totheirfloclring positions. p i

Each of thebrackets l7 are'provided with looking pins27 whichar e pressed inwardly by means of springs 28 and so as to engage A coil spring 24 is securedas at 25 I v the adjacent faeeof the-bars v16 with the teeth 29 thereof. The operation ofthe springs 24 thereby move the toothed portions of the bars 16 in a ratcheting move ment beneath the pins 27 which pins will prevent any unauthorized retraction of the bars and feet.

Each of the trip pins 20 are provided with cords which are attached'as at 31 to a pulley 32 mountediupon a turn shaft 38 extending through the casing 10 and having the end thereof opposite the said pulley pro vided with a ratchet wheel 3and a sprocket 7 wheel 35.

A dog 86 is carried by the box 11 for engaging the ratchet wheel 3a, while a sprocket chain 39 runs over the sprocket wheel 35 and a, further sprocket wheel 38 which is carried by the shank 89 of the operating key 14; of the box. I a I 7 From this detailed description of the invention, the complete operation thereof will be at once apparent The mechanism is normally'arranged as shown in Figs. 1 and 2 and a person desiring to turn me fire alarm projectshis hand and forearm through the collar 13 and turns the key 1 1 with his hand-thereby setting the alarm mechanism in operation. I Such action also turns the 41 thereof so that free accesswill be had vent the removal ofhis hand from the casing 10. The firedepartment being advisedby means of the system of the location of the alarm box, the proper oiiicer visits the box, and may releasethe person sendingin the alarm, The end doors of the casing 10 may then be opened by releasing thelocks tothe interior of the casing and the bars 16 may again be retracted for engagement by thetr'ip pins 41, and the entire device reset by the proper turning of the key 141.

While the form of the invention herein shown and described is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made without departing from the spirit and scope of the invention as set forth in the claims.

What I claim as new is 1. An alarm box, an operating ,key

mounted thereon, an inclosing casing for the said box, an arm receiving collar extending through one sldeof the sa1d box and having radlal openmgs therethrough,

' radially arranged slidably mounted locking bars carried by the said casing and extending through the said openings, resilient locking pins 1n engagement withthe said bars, trip'pins in looking engagement with (lopies of this patent may be obtained-for the said bars when the latter are in their normal positions, releasing cords between 7 the said trip pins and the said key, and projectionsprings in operative engagement with the saidbarsl I 2. A device of the class described comating key carried thereby, a sprocket wheel upon 'thesaid key, an inclosing casing for the said box, an arm receiving collar extending through one side of the said casing and provided withoppositely-arranged openings within said casing, a turn shaft extending through the sa1d. casing andadacent the sa1d box, a ratchet. wheel, a

sprocket wheel and a pulleyupon the said shaft, a sprocketchain in engagementwith the sa1d sprocket wheels, a dogcarrled by the said box in engagement with the said ratchet wheel, arm engaging means extendmg through the-sa1d collar openings, bar- [prising a fire alarm box, a revoluble operengaging trip pins, and trip cords connected between the saidr pulley andtrip pins.

.-3.--A device of, the class described comprising a fire alarm box, a revoluble operating key carried thereby, a sprocket wheel uponthe saidkey, an inclosing casing for the said box, an arm receiving collar ex-Q tending through one side of the casing and provided with oppositely-arranged openings within said caslng, aturn shaft ex tending through the said casing and adjacent the said box, a ratchet wheel, asprocket wheel; and a pulley upon the said shaft, a

'sprock-etchain inengagement with the said sprocket wheels, .a dog carriedby the said box in engagement with the said ratchet wheel, brackets arranged in pairs within said casing, radially slidable bars mounted within the said brackets having ratchet. teeth, and a stop notch in one side thereof.

and extending through the said collar openings, arm engaging feet upon the inner ends of the said bars, a reslhently mounted lockmg pm earned by one bracket of each pair in engagement with the said teeth, a pro-' jection spring for each of the said bars,

spring-pressed trip pins carried by the others of the said brackets in normal engagement' with the saidbar notches when the bars and feet are in'their normal set positions, and releasing cords operatively connected between the said trip pins and pulley.

' In testimony whereof I affix my signature in presence of two'witnesses. v V JOHN KAROLY. e Witnesses: PAUL V. AVER,

'BAURGAN.

five cents each, by addressing the Commissioner-of Patents,

'Washington, D. G. a

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