US312409A

US312409A - Henby e

Info

Publication number: US312409A
Authority: US
Publication date: 1885-02-17
Anticipated expiration: 1902-02-17

Description

H. E. WAITE.

TELEPHONE TRANSMITTER.

(No Model.)

Patented Feb. 17, 1885.

5 H m ulumu llllormry WITNESSES sure firarns HENRY E. VVAITE, OF NEW YORK, N. Y.

TELEPHONE-TRANSMITTER.

SPECIFICATION forming part of Letters Patent No. 312,409, dated February 17, 1885.

Application filed February 2, 1884. (N0 model.)

To all whom it may concern Be it known that I, HENRY E. \VAITE, of New York, county of New York, and State of New -York, have invented a new and useful Improvement in Telephone 'lransmitters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invent-ion relates to telephonetransmitters, and has for its object to improve and simplify their construction and render their operation and regulation more perfect and simple; and my invention consists in a telephone and parts thereof constructed and an ranged substantially as hereinafter specified.

In the accompanying drawings, forming part of this specification, Figure l is a vertical section through a transmitter embodying my improvements, with a diagram showing the arrangement of a circuit including a magnetoreceiver. Fig. 2 is a similar view showing a modification in some of the details of construction.

My improvements are shown as applied to what is known as a box transmitter, in which one side of the box has an opening forming the usual mouth-piece. and behind which opening the diaphragm is supported,

the current-varying devices being behind the diaphragm and protected by the other sides of the box.

In the drawings, A represents such a box having an opening. a, in its front wall or side. In-the drawings 1 have shown fitting behind this wall a plate, a, also having an opening concentric with the opening in the front wall, A, and the diaphragm B is supported in a recess or ledge formed around this opening. This plate may be dispensed with and the diaphragm supported in the front wall in a similar'manner. The diaphragm B is preferably made of a thin plate or disk, of wood, bone, ivory, or other similar non-conducting material, and may be supported in the recess or ledge upon a cushion or ring, I), of rubber or cork, interposed between the ledge and diaphragm, as shown in Fig. 2.

Some means must be provided to hold the diaphragm in position on the ledge, and this I accomplish by a spring, (3, rigidly secured to the plate A at one side of the opening, the other end of the bent spring preferably bearing upon the diaphragm at or near its center.

The spring thus ar *anged not only holds the k diaphragm in position, but acts as a damper to influence the vibrations of the diaphragm, and it may be further utilized to form a support for one of the electrodes Thus in the drawings the electrode 0. of carbon or similar material, is supported on the inner side of the free end of the spring C. The other electrode, d, which is of any desired material, as platinum or carbon, is supported upon a spring, D, one end of which is secured to the plate A outside of the diaphragm, and the spring being so formed as to tend to hold the electrodes out of contact. A screw, 6, is provided which passes through the spring and is secured to the plate or frame, and is used to adjust and regulate the initial contact between the electrodes 0 d.

The diagram shown in Fig. 1 represents one way of connecting up my improved transmitter with a battery-circuit and magneto-receiver.

Various ways of attaching the carbon buttons or electrodes have been used, but I have found the following to be a very effective and simple way, and that electrodes so I made and connected will wear a long time without deterioration and the electrical contact will be perfectly maintained.

The carbon button is first subjected to an electroplating bath and covered in whole or in part with a thin coating of copper or other similar material in a well-know way. If the entire button is plated, I remove the plating at the point of contact with the other electrode; or the plating may be applied to parts only of the button by stopping out such other parts, as is well known. The button is then secured to the supporting-spring by soldering, the electroplating forming a good connecting medium, both mechanically and electrically, 5

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in said recess, a spring-finger secured to said free end bearing upon and supporting and plate and holding the diaphragm in position damping the diaphragm, and the other face and bearing upon its free end one of the eleccarrying an electrode, substantially as detrodes, and an adjustable spring, also secured scribed.

5 to the plate and supporting the other elec- In testimonywhereoflhavehereunto set my I 5 trode in contact with the first, substantially hand this 31st day of January, A. D. 1884. as described. HENRY E. XVAITE.

2. The combination, with a recessed plate, Vitnesses: of a diaphragm in said recess and a spring- REX. M. SMITH, IO finger secured to said plate, one face of its GEO. K. RUNIDEL.