US1505721A - Burglar alarm - Google Patents

Description

Aug. 19 1924. 1,595,721

f .1. MANUEL BURGLAR ALARM Filed Dec. 23 i921 ATmR/VEY Patented nag. ie, reza.

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itesm ,man MANUEL, or BUFFALO, NEW YORK.

BUB'GLAR ALARM.

Application Viilpei lileeemliefr 2S, ,19:21h y,Serial No. 524,362.

To @ZZ whom it may conc-era.'

'le it known that l, lJOHN MANUEL, a

citizen of the United States, residing iii, Buffalo, in the county of lErie and State of New York, have invented newand useful Improvements in Burglar ifrlarmgpf which `the following is a specification. This invention relates to a burglar alarm and more particularly .toan alarin whichis adapted to be operated by r,elatively movable parts of a building, such as the v'sashfof a window which is moved relatively lto the fran'le and which is designed ,to give a ,combined explosive, ringing and lightingfalarin so that if one or the other'of'these alarms should fail to operate, the remaining "alarms will still operate to scare awaya burglar.

it is the object of this invention to provide an alarm of this character `which is comparatively simple and inexpensive in construction, which can be readily applied to various movable parts of a building so that the saine will be operated to give an alarm when'such part is moved andV which can be readily loaded for use, as well as ydisconnected and rendered inoperative when not required. A ln ,the accompanying drawings: h IFigure l isja fragmentaryH ,perspective View of my improved ,burglar yalarm applied to the sash and frame fofa windiw. i 'n Figure 2 is a top .plan viewcf the alarm showing the mannerof c"onneotiifig the sgiiie with asignal bell and signal lamps.

Figure 3 is a vertical longitndinal'seetion of the cartridge vtiring portion ofthe alarm Aand .associated parts Similar characters rof yreference Irefer to like parts throughout the severalfviews.

Although this nburglar alarm "may lbe lapplied to various parts of a building wliicl'l move relatively to each othe13"the same is;

shown in the present instance, applied to Ia window having a frame anda sash movable vertically in .this frame.

The )referred organization of in. im-L proved alarm comprises an enclosing casing 12 which may be secured tothe window framev in any suitable manner so that the same is stationary. At oneend of this casing the saine is provided with an upright barrel lf3, ythe upper end of which is constructed to form a perforated seat 11i while its lower end is opened. Into this seat a cartridge l5 is adapted to be passed downwardly so that the rim 16 of the cartridge ress on top ofthe seat. Upon firing this cartridge by striking ythe top of the same,

thecharge in the lOQCly` thereof will be de livereddownwardly through ythe barrel 13 and escape at the loweren-d thereof, thereby giving a ydetonating sound which will serve as 'an alarm to' arouse'the occupants of the building "and persons nearbyr that some unauthorized person is attempting to enter the building. The yfiring of `this cartridge is effected by means of ja hammer 18 which proje'ctsyupwardly throughl al slot 19 ingthe upper part of the ,casing and is pivoted'y with'its lower part within the casing by means of a r,pin 2O so that vthe hammer swings in a vertical plane. At its outer end the hamnie is ,provided with a firing' pin or needle 2l, which isadapted to hit the top of the cartridge and is `provided in rear of said tiring `place withja finger piece 22 wherebyythe llianfimer maybe drawn backwardly and cocked.` The hammer ishelfd in its cocl{ed ,position by means of a sear 23 which is pivoted en .the inner side of the casing and adapted to eng'agedfwith one or another of y.two knotches inthe lower part of the `hammer according toA whether you Wish `to tcock the hammer half-way or full. Tlhissear is yieldingly held in its operative positionby means Iof ya sear yspring 26 which is interposed between .the rear side ofthe trigger 27y ,projecting downwardly from the scar andan abutment 2,8 ywhich bears against abracketj29 and lthe adjacent part of the CaSngQthS spring being guided and held infitswoperative position by means of a rod 30 whichpasses through the spring 26 and through openings in the `bracket 29 andthe trigger 27 and' has the abutment secured thereto. 'llhesear is released from the hammer by .meansof a ypullline 31V .passing 'through fa slot 32 in the lower part of the casing and l,connected with ,the trigger `27. Upon' pullingk Ydownwardly on the line 31',

the sear is rreleased from the hammer and others who may be attempting to enter ther llO building by opening the window. The downward motion or pulling effect upon the trigger' for sounding the alarm is preferably transmitted to the same yfrom the window sash 11 by providing the free end of the pull line 31 with a link 35 which engages with a hook 36 on the window sash and passes the intermediate part ofthe pull line around a guide pulley or roller 37 on the adjacent part of the window frame.V By this construction an upward motion of the sashl 11 will cause a downward pull upon the trigger 27 and an explosion of the cartridge by the hammer.

ln order to confine the cartridge securely in place and prevent the same from becoming dislodged during the explosion, the keeper 38 is provided which engages over the top or upper end ofthe cartridge and is provided with a central opening 39 through which the firing pin or needle 21 can be passed in order to reach the upper end of the cartridge and lire the same. This keeper is movably mounted on the upper part of the barrel 13 so that the same can be moved into and out of its operative position, for which purpose the keeper is pivoted by means of a pin 40 onone side of its opening 39 on the top of the barrel 13. On one side j v adjacent part of the casing. This keeper is swung to one side of the cartridge seat when a cartridge is applied to a seat or'removed therefrom, but when this keeper is swung over the cartridge, which is arranged on this seat andA engages underneaththe retainer hook or lip 42, the cartridge will be securely held in place and prevented from rising. and instead will be compelled to discharge its coptents through the lower end of the barre ln addition to giving an explosion alarm, this cartridge discharging mechanism is preferably combined with an electrical device whereby an electrically operated lalarm may be given at the same time that the eX- plosion alarm is given, 1n the preferred organization this electrical alarm an elec-V tric bell 43 and one or moreelectric lamps 44 are utilized, which are connected parallel with a battery 45 and two terminalicontacts 46, 47 which are mounted on an insulated support 48 which forms the top of the enclosing casing 12, in such position that these contacts 47 are arranged at opposite sides of the hammer 18 and are adapted to be engaged by contact pins 49 projecting from opposite sides of the hammer. The latter, as well as the Contact pins 49, are made of metal so that when the hammer isreleased for discharging the cartridge the pins 49 will simultaneously engage with the contacts 46 and 47 and thus close the electric circuit containing the bell and the electric lights and thus not only lire the cartridge but also ring the bell and light up the vicinity of the premises wherever the lamps are located. The contacts 46 and 47 are preferably constructed of spring metal so that they are held Linder the downward pressure of the contact pins 49 and thus not interfere with the firing of the cartridge.

. By thus combining the cartridge exploding mechanism with the electrical signaling device greater certainty in scaring away thieves or burglars is assured, inasmuch as the electric warning signal and the explosion alarm are not likely to be inoperative at the same time and thus provide means for giving either an explosion alarm or an elec.- tric alarm and in most instances both of these alarms, when an unauthorized entrance into the building through the window is attempted.

This alarm is comparatively simple in construction and can be readily applied to any relatively movable members of building structure by persons without any particular skill, and when installed the lsame ensures giving either an` explosion alarm or an explosion alarm and an electrical alarm depending upon the manner in which the same is installed and operated.

I claim as my invention:

A burglar alarm adapted to be interposed between two relatively movable members of a building comprising a casing adapted to be mounted on one of said window members, a barrel arranged on said casing and having a seat adapted to receive a cartridge, ahammer pivoted on the casing and having a firing pin adapted to strike the cartridge, a spring adapted to move the hammer forwardly, a sear adapted to hold said hammer in its retract-ed or cocked position and provided with a trigger, a bracket mounted on the casing, a guide rod passing` through said bracket and trigger and having a collar or abutment engaging said bracket, a sprin` surrounding said guide rod and interposed between said abutment and trigger, and a connection between said trigger and the othery window member.

JOHN MANUEL.

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