US88106A - Charles wiley - Google Patents

Description

C. WILEY.

Burglar Alarm.

Patented March 23, 1869.

Mifnes sea nitxl CHARLES WILEY, OF HANNIBAL CENTRE, NEW YORK. Letters PM No. 88,106, dated March 23, 1869.

' IMPROVEMENT m ALARM-BELLS.

The Schedule referred to in these Letters Patent and making part of the lame.

To all whom it may concern:

following is a full,-clear, and exact description thereof,

which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a front view of my invention, and

Figure 2 shows the same, with the hammers and face-' plate removed. 7

Figure 3 shows its application to a ,door.

Similar letters of reference indicate like parts.

This invention relates to a new and improved construction of burglar-alarm, whereby a cheap and efiicient apparatus is obtained, as hereinafter set forth.

In the, accompanying drawings,

A is the alarm-bell, and

B b is ametallic case, which holds the actuating-devices for operating the hammers G C.

These operating-devices consist in a central shaft, or pivot, 11, to which is fixed a ratchet-wheel, f, (fig. 2,)

and a main spring, E, one end of which is fixed to a stud, e, and the other end fastened to the shaft :1,- and in a detent lever, K, with spring Is, one end of said lever K being pivoted to the face, or shell b, and the other end connecting with a trigger, g, which is operated by acord, I.

The hammers O G are pivoted to arms 0 c, which project from the shaft 12, as shown in fig. 1.

Its operation is as follows:

The main spring E is wound up by placing a key on the shaft (1, fig. 1, and the key being turned-in direction of the arrows, the hammers fall by their own weight, so as to clear the bell in winding.

The device is then hung on a nail by the side of the door, as shown in fig. 3, and the trigger-cord I attached to the door, in such manner that the cord will release the detent K when the door is moved-to open it.

When the ratchet-wheel f isreleased, the spring E revolves the shaft (Z rapidly, and the hammers O O are thrown out by centrifugal force, so as to reach the bell and strike it with considerable force. And the ham mers, in this manner,-do notcome in contact with the bell in winding, but are thrown out so as to strike the bell when impelled by the main spring.

The case B b is made of malleable cast-iron usually, and japanned, and the device can be manufactured at a very moderate cost.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is

The burglar-alarm, composed of the bell A, case B, hammers O 0, spring E, shaft dj, and detentsK k g, as herein shown and for the purpose described.

The above specification of my invention, signed-by me, this 21st day of December, 1867.

CHARLES WILEY.

Witnesses:

' F. A. MORLEY, Z. OHAs. Foor.

Images