US806018A - Electromagnetic relay or sounder. - Google Patents

Description

No. 806,018. PATENTED NOV. 28, 1905. T. M. ST. JOHN.

ELECTROMAGNETIC RELAY 0R SOUNDER. APPLICATION FILED APE.12,1905.

7 WM mace 3 $07 as g 7 THOMAS M. ST. JOHN, OF NEW YORK, N. Y.

ELECTROMAGNETIC RELAY OR SOUNDER.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed April 12, 1905. Serial No. 255,168-

To a whowt it may concern:

Be it known that I, THOMAS M. ST. JOHN, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Electromagnetic Relays or Sounders, of which the following is a specification.

The object of this invention is to provide a simple and cheap relay or sounder for toy or juvenile telegraphic outfits.

The details of construction are hereinafter set forth.

In the drawings, Figure 1 is a side elevation, partly in section; Fig. 2, a plan; Fig. 3, a view of the magnet-core; Fig. 4, a per spective view of the iron or steel plate that supports the core and afiords means of adjusting it. Fi 5 shows a bracket in an ap erture in whie the free end of the core vibrates, and Fig. 6 shows an adjustable bifurcated support in which the other end of the core is pivotally mounted.

The wood base or sounding board a rests on cross-strips b I), attached to its under sur face. The core a of the magnet is an ordinary soft-iron headed bolt upon which are driven flanged brass ferrules 0 0 between which the insulated wire (1 is wound. The headed end of core is pivotally seated in an eye formed by a folded strip of thin sheet metal 6, the ends of which pass through an aperture in the base-board and also through a slot in a washer 6, against the under face of which they are folded. This arrangement affords capacity for adjustment of the height at which the end of the core is mounted. The free end of the core plays in an elongated aperture in a bracket f, the upper wall of the a erture forming the upper or back stop for t e vibrating core. Immediately in rear of the flange 0 the core is supported in a seat or notch in the upturned end of a steel or iron plate secured near its other end to the baselate by a brass or non-magnetic eyelet h, in which is seated a steel plug a, constituting a stationary magnetic armature and the front or lower stop of the vibrating core, adjacent which the end 9 of the plate 9 is turned up into such proximity to the core that the latter will not come in contact with it when attracted against the armature and stop i. An adjusting-screw j, passing through the baselate, bears upon the iron plate 9 at a suita le distance from its securing-eyelet and aifords by reason of the resiliency of the plate a means of adjustment of the spring tension so applied to the vibrating core. a: y are the terminals of the winding. As shown, the terminal 00 is connected electrically to a metal hook 7t, eyeleted to the base, and 1 to a contact m, also eyeleted to the base and forming the bottom stop of a Morse key composed of a bent piece of sheet metal 11,, having at its free end a knob or handpiece 0, the other end being eyeleted to the base and the eyelet serving to secure also a metal hook p. The terminal wires of the battery employed are in the arrangement shown to be connected to the hooks k p.

I claim as my invention 1. The combination with a vibrating core, having an appropriate winding, pivotally supported at one end, and front and back stops between which its free end plays, of a resilient plate of magnetic material having an upturned end supporting the core adjacent its pivot, and means for raising or lowering such upturned end to adjust the spring tension applied to the core.

2. The combination of a vibrating core, having an appropriate winding, a resilient plate of magnetic metal having an upturned end supporting the core between its pivot and winding, means for adjusting such end of the plate to adjust the spring tension applied to the core, a stationary armature arranged opposite the core, constituting a front stop therefor and magneticallyinsulated fromv such plate and a back stop for the core.

3. The combination of a base-plate, a vibrating core, having a suitable winding and pivotally supported at one end upon the base-plate, a resilient plate of magnetic metal having upturned ends secured to the base plate beneath the free end of the core, one upturned end supporting the core suitably adjacent its pivot and the other arranged in proximity to the free end of the core but never contacting therewith, a stationary armature for the core constituting a front stop therefor and magnetically insulated from said resilient plate, a back stop for the core, and means for adjusting the core-supporting end of the resilient plate to adjust the spring tension applied to the vibrating core.

In testimony whereof I have hereunto subscribed my name.

THOMAS M. ST. JOHN. Witnesses EDWARD S. DAVIDSON, L. F. BROWNING.

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