US268746A - Acoustic telephone - Google Patents

Description

V (No Model.)

J. K. STEBBINS.

ACOUSTIC TELEPHONE.

No. 268,746. Patented Dec. 5, 1882.

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UNITED STATES PATENT OFFICE.

JAMES R. STEBBINS, OF ASHTABULA, OHIO.

ACOUSTIC TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 268,746, dated December 5, 1882.

Applicationiilcd August 2!, I382. (Yo model.)

To all whom it may concern Be it known that 1, JAMES K. STEBEINs, ot' Ashtabula, in the county of Ashtabula and State of Ohio, have invented certain new and useful Improvements in Acoustic Telephones; and I do hereby declare the following to be a lull, clear, and exact description oi the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to means for supporting the wires of acoustic telephones, the object being to provide a supporting device for the wires, whereby the sound current or vibrations are uninterrupted in turning corners or making bends of the line-wire.

A further object of the invention is to provide the wire-supporting devices with means for allowing of the expansion and contraction of the wire without injury to the line, and for reducing the noise caused by the wind.

In the drawings,Figure 1 represents my improved support and tension device. Fig. 2 is a modification.

A represents a rod provided centrally and at each end with a loop, a, and slightly bent at its center, as shown. To each of the loops to is secured a loop, b, which serve as holders or guides for the line-wire B of thetelephone. To each loop bis secured a guy-wire, O, the opposite ends of which are secured together to vibrate as a unit and terminate in a loop, 0, to which is secured one end of a cord, 1). The latter passes over a pulley, (l, suspended from any convenient point adjacent to the line, and is provided at its free end with a weight, E. By the construction of supporting-rod thus described, all sharp angles in the line-wire are avoided, and the latter approximates a curve at all turning-points, thus retaining the conducting property of the wire, since the sound will freely travel on a curve of the wire, but is much weakened by an angle of the latter.

The tension device described enables the tension of the wire to be regulated as desired, to produce the best results.

In Fig. 2 I dispense with the pulley and attach a weighted cord, F, directly to the wire between two of the poles or supports, which enables the tension of the wire to be regulated.

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

1. The combination, with the line-wire, of a bent supportingrod, loops for receiving the line-wire, guy-cords, and a weight, substantially as set forth.

2. The combination,with the supporting-rod and loops for receiving the line-wire, of guycords, a pulley, and weighted cord, substautially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JAMES K. STEBBINS.

Witnesses:

E. W. RICHARDS, J. O. HUBBARD.

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