US1059835A - Electric signaling device. - Google Patents

Description

v Patented Apr. 22, NH3

GILBERT CHRISTIAN, OF DETROIT, MICHIGAN, ASSIGNOB TO THE WILCKlElf- ARMSTRONG COMPANY, OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

ELECTRIC SIGNALING DEVICE.

`Speeilcacion of Letters Patent.

Patented Apr. 22, 191 3.

Application led `Tuly 8, v19152. Serial No. 708,089.

To all whom t'may concern.'

Be it known that I, GILBERT CHRISTIAN, a citizen of the United States, and a resident of Detroit, county of \Vayne, and State of Michigan, have invented a new and I mproved Electric Signaling Device, of whlch the following is a specification.

This invention relates to electrically operated means for striking gongs, bells or other resonant bodies for the purpose of producing sounds of a predetermined character, and its object is .to provide a slgnal operating device vwhich will freely operate under proper electric impulses, but cannot be caused to produce the predetermined sounds through the shaking, strikingv or other sudden movements of the case containing the signaling device.

This invention consists in combination with a resonant body and a support therefor, of an electro-magnet mounted ad]acent thereto, a hammer pivotally mounted intermediate its ends, a resiliently mounted armature for the magnet, and an arm connecting to the magnet armature and engaging the hammer in such a manner that the energizing of the magnet will cause the arm on the armature to swing the hammer against the resonant body. p

In the accompanying drawing Figure l 1s a plan of this improved mechanism with the resonant bodies removed. Fig. 2 is an elevation of the complete device. y Similar reference characters refer to like parts throughout the several views.

Electric signals for use in connection with telephone pay stations and similar purposes are often sounded by strikin the boxes in which the signaling mechanlsms are contained, and at times, by turning the boxes upside down. To revent such unauthorized operation of slgnals of this type,.the present construction is so designed that the striking mechanism is securely held from contacting with the sounding mechanism, except when properly actuated by its. electro-magnet. In the accompanying drawing, a duplex signal is shown, but it will be understood that. each side acts independent of the other, and each embodies the entire invention.

The supporting portion off this devicel comprises a plate 1, an upright 2 and a ver tical plate 3, on which support the ong 4 and bell 5 are mounted. Any other esired type of support or sounding devices may be employed. An electro-magnet 6 is mounted on each side'of a post 7, onto the top of which is secured a spring 8 which normally holds t-he armatures 9 out of contact with the cores 10, and liftsvthese armatures out of such contact after the magnets are deenergized. Posts 12 have their upper ends slotted andcarry pivots 13, on 'which the hammers 14 are mounted. These hammers are formed with jaws 15, between which the outer ends of the arms 16 extend, which arms are secured to the armatures, as shown in Fig. 2. The hammers have heels 171 to limit their downward movement. Wires 19 connect to their respective magnets, while the return wire 20 preferably connects to both magnets.

, 'It will be observed that when a magnet is energized sufficiently to attract an armature, that the arm presses down the jaws 15 and swings up the hammer 14 a ainst the gong or bell, as shown in dotte lines in Fig. 2, but that the spring 8 will resist such movement at all other times.

In the drawings a bar 22 of suitable material such as soft. iron or mild steel is mounted in the support with the cores 10 and the post 7 of similar material secured thereto, but it should be understood that the entire support may be of such material, and may be given any desired form.

By the construction of the post 7, the core 10, and aconnecting member, such as the bar 22, as well as,the armature of readily magnetizable and demagnetizable material, a powerful magnet-ic field is produced in the narrow air gap between the core of the magnet 6 and the armature 9 'when the electromagnet 1s energized. This permitsthe use of a single electro-magnet to actuate the armature where twoof thesame size are usually employed. It also permits thel use of'less material to complete the electro-magnetic circuits between they various parts. Thl's construction also permits the mounting of electro-magnets and bells in any desired number of lines radiating Jfrom the postr?.

The details and proportions of all these parts'may be modified or changed by skilled electricians without departing from the spirit of my invention as set forth in the claims.

I claim- 1. Inr an electric signaling device, the combination of a resonant body, an. electromagnet, a hammer provided with a pair of jaws, a pivot forsaid hammer, an armature for the magnet, a spring supporting the armature and 'normally holding it out `of engagement with the magnet, and an arm connected to the armature and extending be tween the jaws of the hammer so it may swing the hammer against the resonant body when the magnet is energized, the hammer being so ivoted that its weight is opposed by that o the armature. Y

2. In an electric signaling device, the combination of a support, a resonant body mounted thereon, an electro-magnet and a post mounted on the support, a hammer pivotally mo1nted on said post and having a projection to limit its movement in one direction and a pair of jaws extending toward lsaid electro-magnet, an armature for the electro-magnet, a spring to carry the same and to normally hold it away from the electro-magnet, a support for the spring, and an arm connected at one end to the armature and having its free end extending between the jaws of the 1hammer so'that an operative movement of the armature will swing' the hammer against the resonant body.

In testimony whereof I have signed this specification in the presence of` two subscribing witnesses.

4GILBERT CHRISTIAN.

Witnesses: EDWARD N. PAGELSEN,

HUGO W. KREINBRING.

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