US801105A - Burglar-alarm. - Google Patents

Description

No. 801,105. PATENTED OCT. 3, 1905. D. RBYAM.

BURGLAR ALARM.

APPLIGATION FILED NOV. 30, 1904.

ii l@ li d UNITED STATES PATENT OFFIQE.

BU RGLAR-ALARIVI.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed November 30, 1904. Serial No. 234,97.

To all whom it may 00711007 71..-

Be it known that 1, DAVID REYAM, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Burglar-Alarms, of which the following is a specification.

Hy invention consists of a relatively simple and inexpensive alarm so constructed as to be conveniently attached to a door or window and of such a nature that when properly set it will cause a suitably-placed cartridge to explode when such window or door is opened.

The invention further includes a burglar or other alarm involving such a combination of parts that when it is desired to use the door or window the device may be so adjusted as to remain inoperative until it is desired that it shall become operative, all as hereinafter claimed.

In the drawings herewith, Figure 1 is afront elevation of a portion of a door and its adjacent jamb, showing my invention as applied thereto and ready for use. Fig. 2 is a sectional plan View of the door and jamb shown in Fig. 1 and further illustrating the construc: tion of my improved burglar-alarm. Fig. 3 is aside elevation of the spring-arm to which is fixed the cartridge-holder, the cartridge being shown in position in said holder. Fig. 4c is a front elevation of a portion of a window and of the sill adjacent thereto, illustrating my invention in position ready for use thereon. Fig. 5 is a sectional elevation of the window and device shown in Fig. 4, and Fig. 6 is a modified form of my invention.

In the above drawings, A is a portion of the door, and B a portion of the jamb adjacent thereto, and to this latter I fasten by any convenient means-as, for example, a screw-eye ca supporting structure or plate 0, which is provided with a guideway 0, in which a spring-bar D may be made to slide longitudinally. This bar is usually of steel or springbrass, having its end d which projects beyond the door jamb curled or curved, as shown, to avoid scratching or other injury to the door A.

Fixed in any desired manner to the spring bar D is a cartridge-holder (Z, which in the relatively simple form shown in the figures preferably consists of a plate of thin metal having three of its edges bent or turned over so as to form a receptacle for a paper fulminate cap or cartridge of the well-known construction. This holder, while being rigidly attached to the spring-bar D, faces toward the supporting frame or plate 0.

When it is desired'to operate the door without operating the alarm, the spring-bar D is made to slide in its guideway 0, so that its end 6 will not be engaged by the door A. If, however, it is desired that the alarm shall operate when the door is opened, the spring-bar D is moved into the position shown in Fig. 2, a cartridge similar in shape to that shown at 6 having been previously inserted in the holder (Z. The opening of the door A then bends the spring-bar D out of its normal position into the position shown in dotted lines in the figures, until finally said bar slides off of the edge of the door and springs back to its normal position, thereby striking the cartridge in the holder cl violently against the plate C. Such a blow invariably explodes the cartridge, and thereby attracts attention to the fact that the door has been opened.

Applied to a window F the device may take the form shown in Figs. 4: and 5, the frame or plate for supporting the spring-bar D being removably or permanently screwed to the window-sill G, as shown. In addition I preferably provide a small angular piece of metal E, fastening this to the window-sash in such manner that a portion of it extends under the spring-bar D. As in the case of the door, the opening of the window bends the end of the spring-bar D out of its normal position, but

finally allows it to return thereto, the violence of the blow struck by said bar depending upon the elasticity of the material of which it is made and the distance through which it is moved from its normal position, in any case, however, causing the explosion of a cartridge in the holder (Z.

If desired, the cartridge-holder cl may be permanently fastened to the supporting structure O, as shown in Fig. 6, the cartridge being exploded when struck violently by the springbar D.

I claim as my invention 1. A burglar-alarm including a supportingframe, a spring-bar carried by said frame so as to be free to slide longitudinally therein and normally projecting beyond said frame, and a cartridge-holder carried by one of the said members, substantially as described.

2. A burglar-alarm including a supportingframe having a guideway, a bar movable lonattached to a support, said bar having a projecting portion formed as a guideway,a springpiece slid-ably mounted in said guideway, and a cartridge-holder carried on one of the members comprised by the bar and the springpiece, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

- DAVID REYAM. Witnesses:

' ILLIAM E. BRADLEY,

Jos. H. KLEIN.

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