US1118230A - Telephonic instrument. - Google Patents

Description

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G. R. PREUSSE.

TELEPHONIG INSTRUMENT.

APPLICATION IILB'D 110v.1a,1912.

Patented Nov. 24. 1914.

2 SHEEISSHEET 1.

THE NORRQS PET'ERS C0,, PHOTO-(THO WASHINGTON. D. C

G. R. PREUSSE.

TBLEPHONIG INSTRUMENT.

APPLICATION FILED NOV. 18, 1912 1 1 1 8,230. Patented Nov. 24, 1914.

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G WITNESSES. I l/VVENTOR THE NORRIE #ETER: LU PHOIU-LITHO WASHING-FUN. D, C A

UNITED STATES PATENT OFFICE.

GUNTHER R. PREUSSE, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0 DETECTA PHONE COMPANY OF AMERICA, INCORPORATED, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

TELEPHONIC INSTRUMENT.

Specification of Letters Patent.

Patented Nov. 24, 1914.

Application filed November 18, 1912. Serial No. 732,183.

To all whom it may concern:

Be it known that I, GUNTHER R. Pnnussn, a subject of the Emperor of Germany, (having declared his intentions of becoming a citizen of the United States,) and residing at the borough of the Bronx, city of New York, State of New York, have invented a new and useful Improvement in Telephonic Instruments, of which the following is a specification.

The present invention relates generally to telephonic instruments, with the object, in the main, to provide in a single instrument for a relatively loud voiced annunciatioh or a relatively low toned or whispering annunciation at the choice or control of the person receiving the message.

In a practical embodiment of the invention, a suitable structure, say of box-like, rectangular or other form and adapted to rest on a desk, table or other support and in itself either portable or stationary as desired, contains and supports all of the in strumentalities required to obtain either a loud voiced or a low toned annunciation, and also preferably supports and carries the transmitter, which, however, may or may not form an integral part of the" instrument. It also, preferably, provides for the reception, at will, at the main receiver or station of conversation occurring Within transmission distance of the other or sub-station without the knowledge of the person or persons talking at the latter station.

The improvements embrace two receivers which when both are in circuit with the transmitter at the other station receive the message and announce it in a relatively loud tone and audible at some distance from the instrument. One of the receivers, however, is arranged to be portable so that it may be applied to the ear of the receiving person, in which case, by the act of removing the portable receiver, its companion receiver is out out of circuit and the message is announced only by the portable receiver in a low tone or whisper. The improvements also embrace a movable contact at the main receiver or station and proper electrical connections with the other or sub-station to apparently cut out the latter station yet leave the receiver or receivers at the main station still in circuit with the transmitter at the sub-station.

The transmitter may be connected to an extensible support so that the transmitted conversation may be either loud voiced or low toned according as the speaker may arrange the transmitter away from or close to his mouth. lVith this general understanding of the improvements, a detailed description thereof will follow in connection with the accompanying drawings which illustrate a practical embodiment thereof; in which drawlngs:

Figure 1, represents a plan view; Fig. 2, a front view; Fig. 3, a side view; Fig. 4, a detail view; Figs. 5 and 6, views of the electrical circuits.

Referring to said drawings, a suitable support, such as the box-like structure A, carries two telephonic receivers B, C, one of which, C, is removable and capable of being applied to the ear of the attendant. These telephonic receivers are of any suitable or ordinary structure capable when together in circuit with the transmitter at the other station of delivering the message in a comparatively loud tone, that is to say without the attendant needing to apply the same to his ears, yet when one of the receivers is applied to the ear, its companion receiver is cut out of circuit, and the message is received in a low tone.

The transmitter D, is carried by an extensible support E, which in this instance and in the preferred construction consists of a form of lazy-tongs connected at one end to a rod e, carried by the box-like structure A. and the other end connected to the rear of the transmitter. The lazv-tongs form is preferred because it lends itself to the convenient taking up and letting off of the electrical connections extending to the transmitter. This is accomplished by pro viding a. plurality of holders or buttons 7, at the top and bottom of alternate arms of the lazy-tongs, so that in anv position of the transmitter, whether in its folded condition or in its extended condition the electric connection automatically accommodates itself to the position of the transmitter.

The supporting end of the lazy-tongs is connected to an arm 9 loosely mounted on the rod 6 so that it may swing thereon, and rests on an adjustable collar h so that its height may be regulated.

The two receivers B, C, are mounted in the structure A, behind two flared openings 1', j, to properly deliver the sound. The re ('(ll'Ul it, is permanently mounted in the structure; while the removable receiver (l, is preferably pi-ovided with a stem or handle c, by which said receiver may be conveniently handled, that is to say, placed in position in and removed from the structure A, with out disturbing the attached .electrical connections. To properly hold this removable receiver G, the structure A is formed with a recess or pocket F, extending down from its top behind the flared opening j, and when in such recess presses and holds a suitable spring contact is in electrical contact with a terminal Z, in electrical connection with one of the terminals of the fixed or permanent receiver B. A spring m, in the recess F, may also be provided to bear against the back of the removable receiver C, to steady and hold it in 1proper position in the recess. The rear 0 the structure A, preferably carries a binding post n, through which the several electrical connectionspass.

The top of the structure A, supports a signaling button 0, for signaling the other instrument through suitable electric connections of common form and arrangement. Said structure is also provided with a suitable switch 79, arranged in connection with terminal buttons g, according to the number of instruments capable of being connected. While several buttons 9, are shown, only one is needed in the present example of the invention, 2'. 6., one button (,7, at the main receiver or stationr and one at the sub-station. Another button 9, the off button, is also provided at each station. The arrangement of circuits is such that when the erson at one of the instrumentsthe main station or sub-station,- desires to communicate with the other, the usual signaling button 0, is operated, where upon the switch p, will be moved from the off button 9', on to the button g, thereby placing the two instruments in electrical communication. The conversation may then proceed.

In order to enable the person at main receiver or station to overhear conversation that may take place at the other or substation, the switch p, at the main station, is arranged to close what may be termed a concealed circuit with the other or sub-station while said switch is on the off but ton g, at said main station and the switch at the sub-station is also on the oil button. Thus the lower end of the switch pivot r,

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carries another arm a, at a slightly different angular radius to. that of the switch 7.", which arm .9 has an end properly insulated from the switch which makes metallic connection between two contacts If, one contact electrically connected to one of the terminals of the receiver B, at the main station and the other with the oil button .9, at the sub-station; with the result that conversation at the sub-station will be conveyed. by its transmitter to the receivers B, C, at the other or main station.

The arrangement of electrical circuits is fully disclosed in the diagram shown in the drawings, two stat ons only being shown.

While I have shown a complete structure capable of practically carrying out the improvements, it is obvious that its parts are susceptible of modifications within theprovince of those skilled in the art.

What is claimed is:

1. In a telephonic instrument, a suitable holder having two recesses, a receiver permanently mounted in one recess and a removable receiver in the other recess, the two receivers being normally connected in pan allel and means whereby upon the removal of the removable receiver from its recess the other receiver is cut out of circuit.

2. In, a telephonic instrument, a suitable holder or box having two recesses therein and a flared opening from each recess, a receiver permanently mounted in one of the recesses, a portable receiver mounted in the other recess, the two receivers being normally connected in parallel and a switch between the two receivers whereby upon the removal of the portable receiver it only remains in circuit with the transmitter.

3. In a telephonic instrument, a suitable holder, two receivers supported thereby and. normally connected in parallel with a distant transmitter, means whereby upon the removal of one of the receivers from the holder the other receiver is cut out of circuit, a switch interposed in the circuit between the distant transmitter and said receivers for making and breaking said circuit, and another circuit made by said switch when the other circuit is broken, whereby conversation occurring at one station may be heard at the other.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

GUNTHER n. PREUSSE.

Witnesses.

Gno. H. GRAHAM, JACOB W. OGDEN.

Washington, 11.0.

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