US830038A - Burglar-alarm. - Google Patents

Description

No. 830,038. PATENTED SEPT. 4, 1906.' H. P. ALBURGER.

BURGLAR ALARM.

APPLICATION FILED 001s. 190s.

[NVENTOR izgxy 1/7 0i] lief/Q Z uryer A EINITED STATES PATENT o'rrron.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed October 3,1905. Serial No. 281,114.

To all whom, it may concern:

Be it known that I, I'TALLIE F. ALBURGER, a citizen of the United States, residing at Colwyn, county of Delaware, and State of Pennsylvania, have invented a certain new and useful Improvement in Burglar-Alarms, of which the following is a specification.

My invention relates to a new and useful improvement in burglar-alarms, and has for its object to provide a simple and effective device of this description which may be readily applied to a door or window in such a manner that when an attempt is made to open said door or window a cartridge will be exploded, thereby frightening the intruder and alarming the occupants of the building.

l/Vith these ends in view this invention con sists in the details of construction and com bination of elements hereinafter set forthand then specifically designated by the claim.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring by letter to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a perspective showing my improvement applied to a door, the spring being drawn back just prior to the explosion of the cartridge; Fig. 2, a section of a portion of a door and jamb, showing my improved burglar-alarm attached to said j amb, the operating parts being in the same position as shown in Fig. 1; Fig. 3, an elevation of a portionof a window, showing my improvement applied thereto; Fig. 4, a section at the line as a: of Fig. 3; Fig. 5, a plan view of the alarm, showing the spring-actuated catch forced backward to the position it will assume when the door or window is to be closed.

In carrying out my invention I provide a base A, which is preferably formed from a comparativelythin sheet of metal, and from this base are formedthe two guide-strips B, which are produced by partially cutting the stock from the base and bending the same outward, thus forming guides for the spring C, and the rear of this spring is first passed through these guides and then bent outward to form the stop D, which will prevent the spring from being withdrawn from the guides and also serve as a catch by which the device is put into operative position, as will be hereinafter explained. The inner end of the spring 0 is bent outward to form the lug E,

and a similar lug F is secured to the spring by riveting or otherwise.

G represents the catch, the nose of which passes through the lug E and is provided with the shoulder H, adapted to abut against the lug, so as to limit the outward movement of said catch. A shank I projects rearward from the catch and passes through the lug F, a spring J being interposed between said lug and the shoulder H, thereby normallyforcing the catch forward to the position shown in Figs. 1, 2, and 3.

K is a cartridge-holder, which consists of a strip of metal having its edges bent upward and inward, as indicated at L, and I prefer that this holder be riveted to the base, a c0nsiderable head M being left upon the rivet so as to assist in exploding the cartridge or cap.

In applying this alarm to a door the base is secured by screws N to the door-jamb in such manner that the catch G extends beyond the j amb into line with the door when the latter is being swung open, and a striker O, which consists of a thin sheet of metal bent at right angles, as clearly shown in Fig. 2, is secured to the edge of the door, lapping over upon the face thereof. l/Vhen the alarm is thus arranged, it is obvious that any attempt to open the door will bring the striker in contact with the catch,- forcing the latter outward, and with it the inner end of the spring C, until the catch slips off the striker, thereby freeing the spring, and the latter will fly inward, striking the cap or cartridge previously placed within the holder K and exploding the same, thus frightening the intruder and alarming the household. The alarm may be set before the door is closed, as the closing of the door will not affect said alarm, for as the door swings inward the striker will come into contact with the beveled edge of the catch G and force it backward against the action of the spring J after the manner of a door-latch without disturbing the remainder of the alarm. This has the advantage of permitting the alarm to be set and the occupants of the house passing out through the door and then closing the same and yet leaving the alarm ready for action should the door be tampered with. In the day and at other times when it is not desirable to have the alarm in action it is only necessary to slide the spring backward through the guides B until the catch is beyond the line of the striker, after which the door may be freely opened and closed without operating the IIO alarm. Any suitable cartridge or cap may be used so long as it is adapted to be held by the holder K, and the head M of the rivet will serve as an anvil against which the cap will be forced by the striking of the spring. This alarm is. equally adapted for use in connection with windows as just explained with a door, and when used in connection with a Window the base A is secured by the screws N to the window-sill, as shown in Fig. 3, and the striker O is secured to the side rail of the window-frame in such mannerthat the angle thereof projects outward in line with the catch G, and when the window is lowered the striker passes under the catch; but any attempt to raise the window will lift the catch and the spring upward, finally releasing the catch and permitting the spring to fly down and explode the cap or cartridge.

Having thus fully described my invention, what I claim as new and useful is A burglar-alarm consisting of a base,

guides formed from the base, a spring fitted to slide within the guides, the rear end of the spring being turned outward to form a stop adapted to abut against one of the guides, gigs E and F carried by the spring, a latch fitted to slide in one of these lugs, said latch having a shank adapted to slide in the other lug, a shoulder formed upon the catch, a spring interposed between said shoulder and the rear lug, whereby the latch is normally held in operative position, a right-angle striker adapted to be secured to the door or window and a cartridge-holder secured upon the base, as and for the purpose set forth.

In testimony whereof I hereunto aflix my signature in the presence of two subscribing witnesses.

HALLIE F. ALBURGER.

Witnesses:

MARY E. HAMER, S. S. WILLIAMSON.

Images