US957852A - Transmitting system for space telephony. - Google Patents

Description

V. H. LAUGHTER. TRANSMITTING SYSTEM FOR SPAGE TELEPHONY.

APPLICATION FILED JU LY10,1909.

Patented May 10, 1910.

VICTOR HlmmHTE UNITED STATES PATENT OFFICE.

VICTOR I-I. LAUGHTER, 0F DETROIT, MICHIGAN.

TRANSMITTING SYSTEM FOR SPACE TELEPHONY.

Specification of Iietters Patent.

Patented May 10, 1910.

Application tiled July 10, 1909. Serial No. 506,954.

To all whom it may concern: v

Be it known that I, VIoToR H. LAUGHTER, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, tain new and useful Im rovements in Transmitting Systems for pace Telephony, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to space telephony,

and more especially to an arrangement thereof whereby a transmitter and receiver are automatically thrown in and out of action electrical are, or as singing tricallyor mechanically.

by the operators voice.

1. The general arrangement of the apparatus for transmitting a message may be the same as that described in my application for transmittmg system for space telephony Serial No. 492,763, filed April 28, 1909, and

must include an energizin clrcuit that has a condenser and means or producing an commonly known, a arc circuit in which advantage is taken 0 the influence a magnetic 'field has upon oscillations across separated electrodes" surrounded b adjustably secured behind each are. One

or both. of the electrodes of each arc may be rotated as by a motor 8 either elec- A condenser 9 and transformer 10 with transmitting. an-

. tenna l1 and ground connections 12 in shunt across the arcs complete the secondary portion' of the transmitting system. A transmitter13 of any preferred type in series with a condenser 14 is placed in shunt across the magnet solenoids 15, the respective lay ers of the 'latter'being tapped out, as in ihave invented cergap by-a magnet whose drawing, a suitable gen with sparkgaps 2 formed.

they. change from ;-in the primary clrcuit'ln position to cated, or arranged so that the number of turns in circuit may be varied to change the magnetic field if desired.

In the operation of this from the generator from burning out the telephone transmitter, while the sound waves of the voice on the transmitter vary its conductivity in the usual manner, and setup oscillations which are impressed upon the current passingthrough the arcs and over the blow-out magnetic fields, thus doubly influencing the main clrcuit and inducing in the secondary circuit like oscillations which pass from the antenna to the ether in the usual manner.

Ithas been found in practice that when the voltage and current supply exceed or fall below a certain point, the arcs no longer send out or cause oscillations which are impressed upon thesecondary or antenna circuit. The arcs when in this condition are known as inactive and the point at which active to inactive is known as the critical point. When the apparatus is adjusted so that the arcs closely approach this critical point 'from the inactive side, itis found that speaking'into the transmitter so changes conditions that the arcs become active as long as the sound waves are impressed u on the circuit,

and thus the antenna circuit is energized.

\Vhen thevoice waves cease, thearcs and circult are aga1n1nact1ve. This fact 15 taken advantage of by placing an electromagnet 16 attract a switch 17 which is in serlesbetween the secondary coil of the transformer 10 and the ground 12 and is adapted when so attracted by the magnet to connect the antenna directly to the ground 11. \Vhen the switch 17 is released by the magnet when the circuit and arc become happens when the voice waves do not affect the receiver 13, the switch brings the secondary coil of a transformerof a 'set of receiving instruments indicated at 18' with receiver19 into series with the antenna and ground or into operative relation to the antenna or aerial circuit. As a result, an operator may otherwise throws the receivingset part of the systerm the condenser 14 prevents the current inactive as hold direct conversation with another sta tion, the-receiving set being cut in and out.

automatically by the action of the operators voice upon the transmitter, Without fear of 1n u ry to the delicate instruments of the receiving set from the current of the transmission circuit.

/Vhile the apparatus indicated is preferable, it is to be understood that any form of transmitting apparatus may be used in which the means for-impressing oscillations upon a circuit by sound Waves may be brought or tuned to a point where it only becomes active when variations are set up in the exciting circuit, and the receiving set may be likewise of any suitable type. This arrangement obviates the necessity of throw-over or circuit-openin switches, with their attending diificulties 0- operation and consequent loss of time, the operator working as readily as with the ordinary conductor telephone system now in common use.

Obviously details of construction, form of apparatus used and the arrangement thereof may be altered without departing from the spirit of the invention, and I do not limit myself to any particular form or arrangement of parts.

close to the critical Having thus fully described my invention what I claim is: p

1. Space telephony apparatus comprising a transmitting set including in the circuit oscillation-inducing means adapted to be adjusted to a state of inactivity close to the critical point, and means adapted when influenced by sound waves to bring the oscillation-inducing means tothe critical operative point, a receiving set, and means in circuitwith the transmitting set adaptedt0 throw the receiving set into operative relation with the aerial limb of the transmitting set when the oscillation-inducing means is inactive and to cut out said receiving set when the inductor is rendered active. 2. Space telephony apparatus comprising a transmitting set including in the primary circuit an oscillation-inducing means adapted to be adjusted to a state of inactivity oint, and means adapted when impressed by sound waves to bring the oscillation-inductor to the critical point, and and ground connections, a receiving set using the said secondary circuit in common with the transmittingset, and means in the primary circuit adapted to throw the receiving set into operatiive relation with the secondary circuit when the oscillation inductor is inactive, and to cut it out when the" inductor is active. I

3. Space telephony apparatus comprising a transmitting set including in the primary circuit oscillation-inducing means adapted to be adjusted to a state of inactivity close:

to the critical point, an electro-magnet, and a transformer, a.transinitter in shunt to the primary circuitand antenna and ground and W1 .switch adapted to be a secondarycircuit including antenna in the secondary circuit an antenna, a ground connection and the secondary'coil of the transformer, a receiving set including in its primary circuit a receiver, the secondary coil of a transformer whose primary coil is in series with said antenna and ground, and a switch operated by the electro-magnet and adapted to 0 en the receivin primary circuit when t eoscillationin ucing means is active and to close it when the latter is inactive.

4. Space telephony apparatus comprising a transmitting set including in series in the primary circuit a generator, oscil1ation-indueing means adapted to be adjusted to a state of inactivity close to the critical point, an electromagnet, and the primary coil of a transformer, a transmitter in shunt to the primary circuit adapted to be actuated by sound waves to influence the oscillation indueing means, and in thesecondary circuit an antenna and ground connections in series with the secondary coil of the transformer, a receiving set including a transformer whose primary coil is in series with the loss secondary coil is in series with a receiver, and a switch operated by said electro-magnet and adapted to open the circuit of when the oscillation-inducing means is active.

5. Space telephony apparatus comprising a transmitting set including in the circuit a singing are adapted to be adjusted to a state of inactivity close to the critical. point, an electromagnet in series with the arc and having conventional antenna and ground, connections, and a receiving set operatively connected to the said antenna and ground connections, and provided with a cut out opened by the electromagnet when the singing are becomes active.

6. Space telephony apparatus comprising a transmitting set including a transmitter adapted to be influenced by sound Waves and an oscillation-inducing means that is active only when the transmitter is in operation, and an electro-magnet in series with the oscillation-inducing means,.a receiving set operatively'conneeted to the aerial limb of the transmitting set, and a cut out switch operated by the electro-magnetand adapted to open the receiving transmitter is in operation.

7. Space telephony apparatus comprising a transmitting set consisting of an energizing circuit containing an adjustable arc gap. surrounded by a sensitive gaseous meium, means for impressing electric oscillations on the medium means for maintaining ma net-ic stress on the medium, means contro led by sound waves adapted to vary the intensity of the oscillations and the magnetic stress, a secondary transmitting antenna circuit, a receiving set consisting of a receiver the receiving set i lot set circuit when the 1() operating.

5 electric oscillations on the medium, means 20 ed to vary the intensity of oscillations and 957,852 r I t a point whereby it becomes active only when the sound-controlled means is operating.

9-. Space telephony apparatus comprising an energizing circuit including in series a generator, arcs surrounded by a sensitive gaseous medium and magnets adapted to impose magnetic stress on the medium, means in shunt across the magnet actuated by sound waves and adapted to vary the intensity of oscillation in the energizing circuit, and a second transmitting antenna circuitresponsive to the energizing circuit, a receiving set consisting of a receiver operatively connected in conventional manner to the antenna circuit, an electro magnet in the energizing circuit adapted to be operative only when theme is operating, and a switch operated by the electro-magnet and adapted to cut out the receiver when the arc is active, the are being adapted to be adjusted to a point close to the critical point whereby it becomes active only when the sound-conoperatively connected to the antenna circuit, an electro-magnet in the energizing circuit adapted to be operative only when the arc is operating, and a switch operated by the 5 electro-magnet and adapted to cut out the receiver when the arc is active, the arc being adapted to be adjusted to a point close to the critical point where it becomes active only when the sound-controlled means is 8. Spacing telephony apparatus comprising a transmitting set consisting of an energizing circuit containing a receptacle inclos mg gaseous medium, means for impressing for maintaining magnetic stress on the medium, a secondary transmitting antenna circuit responsive to the energizing circuit,

, means controlled by the sound waves adaptthe magnetic stress, a receiving set consisting of a receiver operatively connected to the antenna circuit, an electro-magnet in the energizing circuit adapted to be opera- 25 tive only when the oscillation impressing means is operative, and a switch operated by the electro-magnet adapted to cut out the receiver when the oscillation impressingv means is active, the latter being adapted to 30 be adjusted to a point close to the critical oscillations in the energizin circuit.

in presence of two witnesses.

VIGTQR H. LAUGHTER.

WVitnesses: O. R. STIOKNEY, A. M. SHANNON.

trolled means is varying the intensity of the In testimony whereoi I aihx my signature

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