US821251A - Switchboard. - Google Patents

Description

' PATENTED MAY 22, 1906.

A. .1. NEWMAN. SWITOHBOARD.

APPLICATION FILED JUNE 14. 1904.

2 SHEETS-SHEET 1.

No. 821,251. PATENTED MAY 22, 1906. A. T. NEWMAN.

SWITGHBOARD. APPLIOATIQN FILED mm: 14, 1904.

2 SHEETS-SHEET 2.

WITNESSES ALBERT T. NEWMAN, OF GREELEY, KANSAS.

SWITCHBOAR'D.

Specification of Letters Patent.

ratenteol May 22, 1906.

Application filed June l4: 1904. Serial No. 212,580.

To aZZ whom, it may concern:

Be it known that I, ALBERT T. NEWMAN, a citizen of the United States, residing at Greeley, in the county of Anderson and State of Kansas, have invented a new and useful Switchboard, of which the following is a specification.

This invention is an improved construction of switchboard to be used in connection with a series of telegraph-sounders, the object being to provide a simple and effic'ient construction of switchboard by means of which the circuit connected to any particular sounder can be closed, if desired, or all of the circuits can be simultaneously closed, if so desired.

With these objects in view the invention consists in the novel features of construction and combination hereinafter fully described, and pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is a perspective view of the switchboard constructed in accordance with my invention. Fig. 2 is a rear face view. Fig. 3 is a sectional view on the line 3 3 of Fig.- 2. Fig. 4. is a diagrammatic plan of the device, illustrating connections to sounders.

In carrying out my invention I employ a suitable case A, which may be arranged in an upright or horizontal position, as preferred, and connected to the exterior of said case are a number of binding-posts, said posts being arranged in pairs, (designated, respectively, B, B B and B and to which are connected the circuit-wires C, C C and 0*, leading to their respective sounders. (Not shown.) Upon the inner side of the case are arranged the spring contact-fingers D, D D and D which are connected, respectively, to the inner ends of the binding-posts B, B B and B and connected also to the said bindin -posts are the wires E, E E and E said wires being connected at their opposite ends to the contacts F, F F and F, said contacts being arranged at diamet rically opposite points of an imaginary circle, as shown in Fig. 1, said contacts projecting from the outer face of the case and are adapted to be engaged by the contact-lever G, pivoted at G and provided with a suitable operating-handle G This contact-lever is so constructed and arranged and so pivoted with reference to the contacts that it will engage the proper pair of contacts, and in Fig. 1 I have shown the said contact-lever as in engagement with the contacts F -When the contact-lever is in engagement with contacts F the circuit passes through the wires E binding-posts B and wires C to the sounder A, and it will of course be understood that by shifting the lever any particular' sounder can be thrown into the circuit. For the purpose of simultaneously closing all of the circuits and throwing all of the sounders into operation I employ a roller H, pivoted within the casing and having a series of contact-ribs H, H H and H respectively, and adapted to enga e the spring contact-fingers D, D D an D respectively, thereby closing the circuit, and these contact-ribs are brought into engagement with the contact-fingers by moving the lever G upwardly until it contacts with the arm I, attached to the roller H, projecting through a slot I, produced in the case, and the springkeeper K is employed for holding the lever G in such position. This spring-keeper is necessary to hold the lever in such position, and when the lever is thrown away from the arm I the roller H is returned to its normal position, throwing the contact-ribs out of engagement with the contact-fingers, and this 'movement of the roller is accomplished by means of a spring L, one end of which is fastened to the case and the other end adapted to engage an eye L, fastened to the roller, the tendency of said spring being to throw the roller back to its normal position.

(Shown in Fig. 3.)

It will thus be seen that I provide a switchboard adapted for use in connection with telegraphic sounders and one by means of which any particular sounder can be thrown into the circuit or all of the sounders simultaneously brought into operation, as preferred.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A device of the kind described comprising a casing, binding-posts thereon, a plurality of contacts arranged in pairs, a pivoted lever adapted to connect the plates of each pair, a spring-finger carried by each of the binding posts, conductors connecting the binding-posts with the contact-plates, electrical conductors connected to the binding-posts and leading to external circuits, a roller j ournaled in the casing, ribs formed on the roller adapted to simultaneously engage all of the spring-fingers, means for holding the ribs normally out of engagement with same, an arm projecting from said roller and a spring connected to the roller, and a springto keeper for holding the lever, substantially as described.

ALBERT T. NEWMAN. Witnesses A. J. RosNER, C. H. SUTTON.

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