US625867A - Door-locking burglar-alarm - Google Patents

Description

No. 625,867. Patented May 3o, |899.

A. M. BENSON.

noon Lncxma Bussum ALARM.

(Application filed May 23, 189B.)

(No Model.)

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NiTl-:D STATES! PATENT OFFICE.

ARZA M. BENSON, OF CLEVELAND, OHIO.

Doon-LOCKING BuR'eLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 625,867, dated May 30, `1899.

Application iiled'May 23, 1898. Serial No. 631,413; (No model.)` v

To '2r/ZZ whom t may concern:

i Be it known that I, ARZA M. BENSON, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Door-Lockin g Burglar-Alarms, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention has for its object a combined door or window lock and burglar-alarm.

The annexed drawings and the following description set forth in det-ail certain mechanism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings,Figure I is an elevational view of the alarm as secured to a doorcasing. Fig. II is a horizontal sectional View through a door and door-casin g, the alarm being shown in plan view.

Adoor-casingAis suitably cut away to permit the burglar-alarm B to be secured thereto by means of the usual screws, so as not to interferewith the opening of the door C.

The alarm consists of a base, in which is pivoted the bifurcated lever-support l?. Lever D is pivoted in the bifurcated portion of said support and is provided at its forward portion with the slotted endd, the rear portion of the lever extending, when in operative position, beyond the easing, so as to engage with the door C. A spring supporting portion e extends outwardly from the base of the alarm, and to this is movably secured the spring E, that pivots on the screw e', that holds it in place. Said spring is provided near its free extremity with a lug c2, and the free extremity of the spring is adapted to slip into the slot formed in the extremity of lever D. A cartridge-support F is formed integral with the base of the alarm and has an opening in i which cartridge f may be placed. Somewhat relnoved from the cartridge-opening is a wall f', which is adapted to receive any discharge from the cartridge.

By locating the spring between the cartridge-support and the base and the lever be'- ftween the spring and base a compact and neat arrangement of parts is secured.

The operation of the device is as followsi A cartridge is placed in the cartridge-opening, the lever D is swung around until its rear extremity crosses the path of the opening door, the free end of the spring is inserted in the slot of the lever, and the device is ready for use. If the door is forced open while the device is in operative position, the leverD is moved from the position shown in full lines in Fig. II to the position shown in dotted lines in Fig. II, and the spring is released from engagement in the slot, so that the lug e2 is brought in violent contact with the cartridge and the cartridge is exploded,

and permitting the door to be freely opened or closedwithout engaging with said lever. This is accomplished by turning the leversupport on its pivot and turning the spring on 4the screw e.

Other modes of applying the principle of my invention may be employed instead of the one explained, change' being made as regards the mechanism herein disclosed, provided the means covered by any one of the following claims be employed. y

I therefore particularly-point out and 'distinctly claim as my inventionl. The combination of a cartridge-support, a lever, a spring-support, a spring pivoted upon said spring-support, a lever pivoted upon a base, said spring-support secured to or integral with said base, said spring located between the cartridge-support and the base and said lever located between said spring and base, substantially as set forth.

- 2. The combination of a cartridge-support,

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a lever, a, spring-support, a spring pvoted gage the end of the springysubstantially as upon said spring-support, and aleverpivoted set forth. upon at base, said spring-support secured to Signed by me this 19thv day of May, 1898.

or in tegi'al with said base, said sprn g located A. M. BENSON. 5 between the cartridge-support and base, the Attest:

lever located between the spring and base and D. T. DAVIES,

formed with an end slot and adapted to en- J. C. TURNERA

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