US315838A - Burglar-alarm - Google Patents

Description

UNITED STATES ATENT OFFICE.

WILLIAM H. REIFF, OF PHILADELPHIA, PENNSYLVANIA.

BURGLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 315,838, dated April 14; 1885.

Application filed July 8, 1884.

To all whom it may concern:

Be it known that I, WILLIAM H. REIFF, a citizen of the United States,'residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful .Improvements in Burglar- Alarms, of which the following is specification, reference being had therein to the accompanying drawings, wherein- Figurel is a sectional elevation showing the burglar-alarm in position in front of a door and set for operation. Fig. 2 is a broken elevation illustrating a two-part or adjustable trigger for the alarm. Fig. 3 is aperspective of the alarm. Fig. 4 is a longitudinal vertical section of same. Fig. 5 is a like view showing the trigger and locking-lever for the escapenient-wheel pallet; and Fig. 6 is aplan, partly sectional, of the alarm.

My invention has relation to burglaralarms of that form comprising a wedge-shaped box containing an alarm and trigger mechanism, and adapted to be placed upon the floor adjacent to a door, so that when it is opened it impinges against the trigger to sound the alarm and wedges itself against the alarm-box to prevent further opening; and it has for its object to provide a simple and inexpensive alarm which may be handled with safety and readily placed in position for protecting a door or other entrance to a room or building.

My invention accordingly consists of the combination, construction, and arrangement of parts, as hereinafter described and claimed.

In the drawings, A represents the wedgeshaped box, having a toe-piece, a, with downwardly-projecting pin or prong a, for fastening the box to the floor or other fixture, an

(Model.

frame-work c of the spring-motor, and resting upon the bottom of box A, is a verticallyarranged sliding plate, E, moving horizontally in the box, and having a horizontallyprojecting catch or toe-piece, e, and an end or tail piece, e1, which extends upwardly to near the top of the box, as more plainly shown in Fig. 5.

To the end a of sliding plate E is pivoteda lever or trigger, F, having its fulcrum f in the side a of box A. The trigger F projects through a recess, formed in the edge 9 of cap or cover G, and extends above the same, said recess g, in conjunction with the adjacent part of the box-side a, forming a guide for the trigger to move in. The toe-piece or lip e of plate E is in the plane of and is adjacent to the pallet d, and is cut out at e to form a curve side for fitting around one end of the pallet when closed against it, as shown in Fig. 6.

The lid G is provided at its front end or its under side with perforated lugs h, which are in line with the openings at in the sides of box A, and at its rear end with pins or studs h, which pass into the box-openings a in its rear wall, a to sustain one end of the lid or cap, its other end being fastened to the box by a pintle or rod, I, passing through the boxopenings a and perforated lugs h. Said rod I is removable fromjits bearings to provide for detaching the lid from the box whenever it is necessary to do so. In lid G is an open ing, for the passage of the winding-key L.- (See Fig. 4.)

The operation is as follows: The alarm be ing' suitably placed adjacent to the door or other fixture to be protected, or as illustrated in Fig. 1, the trigger F is then moved to the right, or toward the toe a of box A, so as to bring its end f as near to the door as possible. Such described movement slides the plate E in the direction indicated by arrow 1, Fig. 6, or backwardly, and causing its toepiece or lip e to close against and lock the pendulum d in a fixed position, as illustrated in said last-named figure, to prevent the unwinding of the spring of the motor. In such position of said parts the alarm is set and the door protected. A slight opening movement of the latter, or to the extent indicated by dotted line at, Fig. 1, moves the trigger F on its 'fulcrum f a sufficient distance to slide the plate E forward the extent required for releasing the toe-piece or lip e from engagement with pendulum d, as indicated by dotted lines in Fig. 6, whereupon the spring-power is free to act and the alarm is sounded. Further movement or opening of the door, or past the dotted line y, Fig. 1, causes the lower edge of the door to contact with and wedge itself upon the box to stop itsstill further movement, so that while the alarm is ringing, or after it ceases,the door cannot be opened to its fullest extent, or'to such extent that will enable a burglar or otherperson to pass in and out of the room.

To make the action or movement of the trigger F more sensitive, it may be provided with an adjustable extension piece or bar, m, (see Fig. 2,) so that the slightest movement of the door will set off the alarm.

In Fig. 3 the trigger is provided with a ring, a, and string or cord n,for attachment to a window-sash, whereby both the door and other entrances of a room or building are protected by one and the samealarm.

What I claim is 3. The combination of box A, having re-' movable lid G,with recess g, bell B, motor 0, 0

plate E,and trigger F, projecting through said recess, substantially as shown and described.

4. The combination of box A, having lid G, bell B, motor' 0, plate E, and trigger F,

with end piece, m, substantially as shown and described. v

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. REIFF. Witnesses:

S. J. VAN STAVOREN, CHAS. F. VAN HORN.

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