US287618A

US287618A - Circuit-closer for electric alarms

Info

Publication number: US287618A
Authority: US
Publication date: 1883-10-30
Anticipated expiration: 1900-10-30

Description

(No Model.)

L. A. BRIGEL.

CIRCUIT CLOSER FOR ELECTRIC ALARMS.

No. 287,618. Patented Oct. 30, 1883.

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UNITED STATES PATENT OFFICE.

LEO A. BRIGEL, OF CINCINNATI, OHIO.

CIRCUIT-CLOSER FOR ELECTRIC ALARMS.

SPECIFICATION forming part of Letters Patent No. 287,618, dated October 30, 1883,

Application filed August 24, 1883.

To aZZ whom it may concern.-

Be it known that I, LEO A. BRIGEL, of Oincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Circuit-Glosing Devices for Electric Alarms, of which the following is a specification.

My invention is an improvement in the class of circuit-closers for electric alarms in which a flexible board provided with intersecting wires that constitute the terminals of an electric alarm are held out of contact at their intersections by springs, so as to present an open or incomplete circuit which is closed or completed and the electric alarm sounded by the depression of one or more of the said springs by any person walking over or setting foot on the same.

In the accompanying drawings, Figure l is a perspective under side view, and Fig. 2 is a vertical section, of a eircuitrcloser embodying my invention. Fig. 3 is a vertical section of one of the intersections in its open condition. Fig. 4 is a vertical section of the same in the closed condition. Fig. 5 shows one of the springs detached.

A represents a sheet or board, preferably of the material known as tar-board, molded to the represented pan form, and slit and perforated, as at a and a.

P and N represent the terminal portions of two wires that form part of an open circuit communicating with an electric alarm of any suitable construction. These wires are interwoven in or otherwise attached to the board, so as to intersect one another, preferably at right angles, by engagement in the slits a and perforations a, as shown. Of these wires, one say wire P-is held aloof from the other wire at the places of intersection by means of metallic springs G of the represented curved form. Each spring is so attached at one of its ends, by means of clinched tin or copper tacks D, to the board as to straddle, in the manner shown, a part of the wire 1?, near an intersection, and each has an orifice, 0, preferably a little beyond its mid-length, as indicated, through which the same wire, I, is rove, and so on at each spring in succession. By this means contact of one wire with the other is made impossible, except by a considerable pressure exerted upon the board at or near one or more of the intersections-such, for example, as would be made by the foot of a person walking over or stepping upon the board.

(N0 model.)

its cheapness, durability, and its impermea- I bility to moisture, exemption from vermin, &c. The device is believed greatly superior to any for like purpose heretofore devised in the important respects of simplicity an d economy of manufacture, ei'iiciency, cheapness, and durability.

An important benefit incident to the described pan form which brings the edges close to the floor consists in the exclusion of dust, which in kindred devices often destroys the eiiiciency of the apparatus by either closing or preventing closure of the circuit. Another benefit consists in the relief of the springs from severe pressure against the floor in consequence of the downturned margin of the board upholding the intermediate portions well clear of the floor.

I claim as new and of my invention- 1. A circuit-closer for electric alarms, con sisting of the elements following, to wit: flexi- .ble board A, two wires, I N, that constitute the terminals of an open circuit of an electric alarm, and which are so attached to the board as to intersect one another at or near right angles, and of which one is held aloof from the other by curved springs C, attached to the board, and through orifices c, in which the said wire is rove, substantially as and for the purposes set forth.

2. In a circuit-closer for electric alarms, the combination of the described slit, perforated and pan-formed tar-board A, the attached perforated springs O, and the two electricalarm terminals 1 N, of which both are so rove through the slits and perforation of the said board, and one of them through the ori fices of the springs, as to intersect one another without contact, substantially as and for the purposes set forth.

In testimony of which invention I hereunto set my hand.

LEO A. BRIGEL.