US324728A

US324728A - Telephone transmitting apparatus

Info

Publication number: US324728A
Authority: US
Publication date: 1885-08-18
Anticipated expiration: 1902-08-18

Description

(No Model.) V 2 Sheets-Sheet 1.

T. J. PERRIN.

TELEPHONE TRANSMITTING APPARATUS.

180.324,?28. Patented Aug. 18, 1885.

WITNESSES INVENTOR Thom o J ferrz'n. 6%; I By 721:) .fllturney-S' Q4. 0. WW

(No Model.) 2 Sheets-Sheet 2.

T. J. PERRIN.

TELEPHONE TRANSMITTING APPARATUS.

No. 324,728. Patented Aug. 18, 1885 WITNESSES 1 iNVENTOR 2720772425 JPerrz'n.

N, PETERS. Phflfl'l-ilhogmpher, Washingiun. 04 c.

THOMAS J. PERRIN, OF NEW YORK, N. Y., ASSIGNOR TO THE NATIONAL IMPROVED TELEPHONE COMPANY, OF NEWV ORLEANS, LOUISIANA.

TELEPHONE TRANSMITTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 324,728, dated August 18, 1885. Application filed Marrh 23, ISFS. (No model.)

To aZZ whom it may concern.-

Be it known that I, THOMAS J. PERRIN, of New York city, State of New York, have in vented certain new and useful Improvements i n Telephonic Transmitting Apparatus, of which the following is a specification.

My invention relates to that class of instruments in which several transmitting diaphragms are employed either to transmit the same utterance into different circuits or to intensify the effect in a single circuit; and the invention consists in certain improvements in the apparatus for conveying the vibrations of the sound uttered to the several diaphragms.

In the accompanying drawings, Figure l is a plan view of my improved apparatus, and Fig. 2 a part elevation partly in section.

A sounding or resonating box, A, of suitable depth, breadth, and length, and preferably rectangular. in cross-section, is made of some resonant material, such as light, wellseasoned wood, and is provided with amouthpiece, A, which is screwed or otherwise secured centrally in its upper face. Short out- 2 5 ward] yprojecting tubes, B, are secured in apertures in the fiat sides of the resonatingchamber A, and the outer ends of these tubes are screw threaded, as shown. Each dia phragm is secured in a suitable case, 0, in the 0 upper face of which, and centrally over the diaphragm, a sound -conveying tube, D, is screwed or otherwise secured. The upper end of this tube is screw-threaded in a direction reverse to that of its corresponding tube, 3 5 B, and the tubes B and D are drawn together by a reversely internally-threaded sleeve or nut, E. I have illustrated in the presentinstance transmitters having horizontal diaphragms, as clearly shown at the lefthand 0 side of Fig. 2, and have therefore employed curved sound-conveying tubes D in connection with them, as shown. The diaphragm F is shown as carrying a downwardly-proiecting pin, f, on the lower end of which an electrode, G, is carried. The other electrode, H, rests loosely on top of the electrode G, and the pin f passes through it. The upper electrode, H, carries a light metal arm, I, which projects radially from opposite sides, and is turned down at its ends, so that its ends run transmitter which may be used in connection,

with my improved sound-distributing apparatus, and it forms the subjectmatter of another application, filed March 27, 1885, and numbered 160,314.

By employing a central resonating or sound- 6 ing chamber thence each to an independent diaphragm I am able to connect or disconnect a transmittingdiaphragm with any of the tubes, so that I may use as many as the sounding-chamber affords connection for; or I may disconnect some of them and plug up their tubes 13.

I prefer to make the sounding-chamber rectangular in cross-section and of resonant maand separable tubes leading from terial, so that it will take up and more effectually convey the sound-vibrations to the several diaphragms.

I claim as my inventionl. The combination of the independent central resonating-chamber, the j ointed separable 8o sound-conveying tubes radiating therefrom, and the transmitting diaphragms and electrodes.

2. The combination of the independent central resonating-chamber, a mouth-piece and sound-con veying tube connected therewith, the curved jointed or separable sound -conveying tubes leading to the several transmitters, and horizontal transmitting diaphragms and electrodes.

In testimony whereof I have hereunto sub scribed my name.

THOMAS J. PERRIN.

\Vitnesses:

JNo. R. J UDIJN, 19. O. DAVIDSON.