US1189070A - Wireless telegraphy. - Google Patents

Description

B. V- DEITZ.

WIRELESS TELEGRAPHY.

APPLICATION FILED MAY 6. I914.

1,189,070. Patented June 27,1916.

2 SHEETS-SHEET I.

Wrzzeg B. V. DEiTZ.

WIRELESS TELEGRAPHY. APPLICATION FILED MAY 6, 1914.

1 1 89,070, Patented June 27, 1916.

2 SHEETS-SHEET 2.

QEQ4 .Ziz v ezz Z02 Barr Z! Zea 5' WWW UNITED STATES PATENT OFFICE.

3m V. IIJIIJLIFJZ, OF SLIITGEBLANDS, NEW YORK.

wnmmss TELnemnY.

"citizen of the United State residing Slingerlands, in the county of Albany and State of New York, have invented new and useful Improvements in Wireless Telegraphy, of which the following is a specification.

My present invention relates to improvements in the art of wireless telegraphy or radio-transmission and has for its ob ect to provide a system whereby two or more messages or signals can be transmitted from one aerial system or apparatus wlth relatively high efficiency and without interference between the messages or signals A further object of the invention is to provide apparatus for accomplishing this result which is relatively simple and inexpensive in its construction and which is capable of operating with high efliciency.

To these and other ends, the invention consists in certain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly in the claims at the end of the specification.

In the accompanying drawings:-Figure 1 is a diagram of a multiplex wireless telegraph or radio-transmission system embodying the present invention; Fig. 2 is a front elevation of a rotary discharger and alternator adapted to be used in connection with the present invention; Fig. 3 is a top lan view of the rotary discharger and a ter nator.

Similar parts are designated by the same reference characters in the several views I have found from experience that while the discharges of a radio-transmitter occur as frequently as five-hundred times a second, each single discharge occupies So small a part of a second that the discharges in the aggregate consume only a small fraction of the time elapsing during transmission. According to the present invention, I utilize a part of the time heretofore lmused and existing in the intervals between discharges to transmit one or more additional dis- Speciflcation of Letters Patent.

PatentedJune 27, 1916.

tinguishable messages or signals by applying one or more additional transmitters which, according to the present invention, are used with the same aerial system, that is to say, a plurality of transmitters are employed in connection with a single or common aerial system.

I have shown in the accompanying drawings and will hereinafter describe a system embodying the present invention which comprises two transmitters operating with a single aerial system. It will be understood, however, that the invention is not restricted to the precise arrangement shown, as equivalent arrangements are contemplated, andalso it will be understood that the invention comprehends a multiplex sys tem which may employ two or more transtnitters operating with the same aerial sysm. In the system shown in Fig. 1, A represents an aerial system, B represents what I term a rotary alternator which serves to bring the different transmitters alternately or successively into operative relation with the system, C and C represent condensers for the respective transmitters, D represents a dynamo or source of power to operate the system, a multi-phase alternating current dynamo being shown. I and X represent inductance for one transmitter-and a con denser for the other transmitter respectively, O and 0' represent oscillation transformers for the respective transmitters, R represents a rotary discharger operative in synchronism with the alternator B and coiiperative with the pairs of spark plugs LL and MM, T and T represent the primary or step-up transformers, K and K represent the keys of the respective transm1tters,' G represents'i the ground for the system, and Urepresents a motor which, in the present instance, is used to operate the rotary discharger R and the rotary alter nator B. H and J designate stationary spark-plugs 'forthe rotary alternator.

The elements above described are connected with the necessary fuses and switches in the following way :The aerial A is connected to one side of the rotary alternator of the left-hand transmitter, this inductance being'preferably adjustable in order that it -may vary the wavelengths from this transmitter, and the stationary spark plug J of the rotar alternator is connected to a condenser for the right-hand transmitter to vary the wave lengths for the right-hand transmitter in order to enable the receiving operators to easily distinguish between the multiple transmission of messages or signals from the diiferent transmitters. The oscillation transformers O and O are connected by a wire 0 to ground G and the oscillation transformers are also connected to the inductance Iand condenser X respectively, as shown. The oscillation transformers are also connected to the condensers C and C and to the secondaries of the transformers T and T, the stationary spark,

plugs L-L of the rotary discharger being connected to the oscillation transformer O,

condenser C and transformer T, as shown, and the stationary plugs M--M of the rotary discharger being connected to theoscillationtransformer O, condenser C and transformer T, as shown. The primaries of the transformers T and T are connected to the multi-phase alternating current dynamo or source of kower by the wires T and T, and the keys and K are connecte ed to the multi-phase alternating current dynamo D by the wires T and T. While the ground leads from both transmitters are connected permanently to the ground, the aerial, according to the present invention, is rapidly brought into operative relation with one transmitter and rendered inoperative relatively to the other transmitter, and vice versa, whereby when a message is being sent from one transmitter, the circuit between the other transmitter and the aerial is broken. Therefore, the entire energy from each transmitter is alternately or successively sent from the aerial system without loss through a transmitter not at that moment in action. To this end, the spark plugs of the rotary alternator and the rotary discharger corresponding to the different transmitters are so related that, when the plugs MM on the rotary discharger corresponding to the left-hand transmitter are in discharging position, the spark. plug H of the rotary alternator corresponding to this same transmitteris also in discharging position, while at this same .moment the spark plu L-L of the rotary discharger correspon ing to the right-hand transmitter and the spark plug J of the rotary alternator corresponding to this same transmitter occupy positions between the projections on the dischaxger and alternator tively and are therefore .in non-discharge positions. The reverse action tnkes place on further rotation ncvl md alternator whereby the righttransmitter is brou the aerialeand the left-hand sydem is rendered inactive relative] to the aerial.

In the construction charger R and the rotary alternator B oomprise disks which are mounted on but inght into action relatively to sulated from a single shaft V of a motorbll,

the motor being preferabl interposed alternator and tween the discharger and the ,whole being mounted upon a suitable insulating base W. The rotary discharge: R embodies preferably a metallic disk which is rigidly fined on a rubber'or insulating bushmg P which occupies a lane perpendicular tpl th; akxiis1 of the shaft 2, the outer face of t e is aving plugs rojectmg therefrom c uidistantly and a in circumferential a ement, these plugs 0 I relatively long radially but of narrow circumferential length. The stationary l or electrodes L-L and M--M are pre the insulating base W at the outer side of the disk of the rotary dischu-ger and are positioned in immediate proximity to' the path of the plugs S on the whereby the plugs S pass and are alternately in disc relation with the per of monnry l LL and MM vel The fa es f the stationary plugs L L and I l-H. present surfaces which are relatively 1 rsdially and are narrow cimumferentizfi to tlie corsrespolilding' or similar surfaces 0; the p u on t e I rovidfii ark may fTorihr-y and revo ving plugs which will insure accurately timed and sharp discharges of the sparks between the pl 1 Iihe h otary miar to t e r it ahm etallic 81 grad rm ii temotor a an vingpugs mjecting from the outer face thereof, these plugs being relatively long radially but narrow circumferentially, and the stationary plugs H and J are mounted on the insulating base W and present similar-faces to the plugs B on the alternator disk.

The adjustment of the stationary plugs is such that, during rotation of the discharge!- disk, the plugs MM are opposite to a pair of plugs SS on the discharger disk, and the plug H will be opposite to a plug on the rotary alternator disk, while in two transmitters, as shown, the plugs L- are midway between the plugs on the rotary discharger disk and the pl J of the. rotary alternator will also be mi way between the plugs on the rotary alternator disk. Synchronism is thus obtained between the rotary discharger and the rotary alternator, and

own,therotarydislymountedon when a discharge takes place between one set of plugs, the other set of plugs is in nondischarge position.

The motor U, preferably an electric motor, is so arranged, by reason of the position of its armature relatively to the position of the rotary discharger and alternator disks, that, while the motor is running at its speed on one phase of the alternating current, the motor brings the plugs leading from the transmitting condenser, which is driven by the same phase current, to sparking position and discharges that condenser immediately after such condenser has become charged to capacity and the current has ceased to flow from the transformer which charged that condenser, each condenser being-discharged in a like manner. While the spark takes place in one transmitter only at a time, the speed of the motor and the rotary discharger and alternator is such that the discharges in any transmitter are sufliciently rapid and frequent to produce a musical note which is the audible result of the operation of one transmitter, and this musical note may be interrupted at will by action of the key of the respective transmitter to form signals or messages.

While, as stated, but two transmitters are shown, a third transmitter may be added by introducing two additional electrodes or spark plugs to the rotary discharger and one additional stationary spark plug to the alternator, rendering the discharger and alternator synchronous and timing the system so that no two transmitters act at one time, the time space or interval between the actions of the different transmitters being preferably equal, this being accomplished by suitably spacing the additional stationary spark plugs or electrodes for the rotary discharger and alternator. In a similar way, additional transmitters may be added to the system and, in any case, a multiplex system is produced which enables a plurality of signals or messages to be transmitted from the same aerial with efficiency and without interference between the signals or messages.

I claim as my invention:

1. A system of radio-telegraph) comprising a plurality of independent transmitters embodying oscillation transformers for producing trains of waves of different lengths respectively, a single aerial common to said transmitters, a rotary discharger common to said transmitters, a rotary alter nator, and means for continuously operating such alternator synchronously with said discharger, the alternator alternately rendering the transmitters operative relatively to said aerial and rendering the other transmitter or transmitters inoperative with respect thereto.

2. A system of radio-telegraphy comprising a plurality of independent transmitters embodying oscillation transformers operative to produce .natural sympathetic vibrations of different wavelengths respectively, a single aerial common to said transmitters, a rotary discharger common to said transmitters, a rotary alternator, and means for continuously operating such alternator synchronously with said discharger to alternately render the transmitters operative relatively to said aerial and to render the other transmitter or transmitters inoperative with respect thereto.

3. A system of radio-telegraphy comprising a plurality of independent transmitters embodying oscillation transformers va= riable independently to produce natural sympathetic vibrations of different perodicities, a single aerial common to said trans-- mitters, a rotary discharger common to said transmitters, a rotary alternator, and means for continuously operating said alternator synchronously with the discharger to alternately render the transmitters operative relatively to the aerial and to render the other transmitter or transmitters inoperative with respect thereto.

4. A system of radio-telegraphy comprising a plurality of independent transmitters embodying oscillation transformers for producing trains of waves of different lengths respectively, a single aerial common to said transmitters. a rotary discharger common to said transmitters, a rotary alternator interposed between the oscillation transformers and the aerial, and means for continuously operating said alternator synchronously with the discharger to alternately render izhe transmitters operative relatively to the aerial and to render the other transmitter or transmitters inoperative with respect thereto.

5. A system of radio-telegraphy comprising a plurality of independent transmitters embodying oscillation transformers operative to produce natural sympathetic vibrations of. different wave lengths respectively, a single aerial common to said transmitters, a rotary discharger common to said transmitters. a single rotary alternator interposed between the oscillation transformers and the aerial, and means for continuously operating such alternator synchronously with the discharger to alternately render the transmitters operative relatively to the aerial and to render the other transmitter or transmitters inoperative with respect thereto.

6. A system of radio-telegraphy comprising a plurality of independent transmitters embodying oscillation transformers variable independently to produce natural sympathetic vibrations of different wave lengths respectively, a single aerial common to and mitters, a rotary alternator, and means 'for In testimony whereof I have hereunto set continuously operating the alternator synmy hand in presence of two subscribing witchronously with, the disoharger to alternesses.

nately render the transmitters operative rel- BURR V. DEI'I Z. atively to the aerial and to render the other Witnesses:

transmitter or transmitters inoperative with C. A. BATEMAN, respect thereto. CHAS. S. Hm.

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