US1279850A - Wireless apparatus and method therefor. - Google Patents

Description

. W. DUBILIER. WIRELESS APPARATUS AND METHOD THEREFOR. APPLICATION mz'o IIAY 6. 1913.

1,279,850. A V Patentedsept. 24,1918,

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WLDUBILIER. WIRELESS APRA-BATUS MD METHOD THEREFOR. APPLICATION mm In a. 1913., I 1,279,850. v PatenoedSept. 24 1918.

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v tor adapted to. be used in WILLIAM DUB'ILIER, or NEW YORK, N. Y.

WIRELESS APPARATUS AND METHOD THEREFOR.

To all whom it may concern.

Be itknown that I, WILLIAM DUBILIER, a citizen-of the United States, residing at New York, in the county of New York, State of New York, have invented a new and useful Wireless Apparatus and Method Therefor,,of which the following is a specification. Y

The object of myinvention is to provide a sending apparatus which will produce efficiently electrical oscillations suitable for use in wireless telegraphy, and a method of producing such oscillations.

Further specific objects and advantages of my invention will be in part obvious and in part specifically mentioned hereinafter.

For purposes of illustration I have shown several forms of my invention, which forms are to be considered merely as typical examples of the principle thereof.

In the drawings, Figure 1. hows an electromagnetic vibraproducing oscillations; v Fig. 2 shows a system for carrying out'this invention, in which the vibrator shown in Fig. 1- is adapted to be used. V

Fig. 3 shows, diagrammatically, another arrangement for carrying out this inven' tion; and V Fig, 4 shows, diagrammatically, a still further arrangement when used for wireless 'telegraphy, with an aerial and ground.

Figs. 1 to 4 illustrate the application of a vibrator or oscillator to a wireless sending device. In Fig.1 I have shown a simple form .of electromagneticvibrator consisting of a coil a wound upon acore a", a sprin finger 0 being mounted adjacent the end of the core, and carrying a movable contact (1 A fixed contact d is opposed to contact (l and a spring holds the movable contact 11 against fixed contact d except When-an armature 73 attached to spring finger Q, is attracted by the core a".- i

As shownin Fig. 2, such an interrupter 0! may be used in a primary circuit containing any suitable alternating or direct our- 7 rent source of. energy, an inductance a and the primary of a transformer 0, An OSClllating circuit is provided ,bymeans of a condenser e which is in parallel with the interrupter and transformer primary :0.

In the operation of the apparatus shown in 'Fig. 2 current passing from the source of energy, through inductance a, interrupt-er Specification'of Letters Patent. Patented Sept. 24, 1918- Application filed May 6,1913. Sierial No. 765,835.

d, transformer primary 0, breaks the primary circuit at contacts (1 and al and is charged by the action of the arc across said gap. Inductance a prevents surges from traveling back through the generator circuit, and also assists incharging the condenser due to the self inductive effect obtained when circuit is broken at d d Theoscillations are then extinguished by the gap at d and 03 The apparatus operates most efficiently when the period of vibration of spring 0 of the vibrator, is in a selected ratio tothe natural frequency of the oscillating circuit c-d-c, that is to say, when such period of vibration is either equal to,

or a harmonic of, the natural frequency of the oscillating circuit. Figs. 3 and t-illustrate modifications of the circuit arrangement used in ,Fig. 2, a

capacity f, and an inductance 9 being placed in parallel with interrupter d in Fig. 3, and a condenser 12 being placed across .the primary c in Fig. 4c.

An apparatus of thetype shown in Figs. 1 to 4 is verylight in weight, owing to the fact that a simple electromagnetic vibrator The co'ndenser e is in parallel with the gap at d -d is used to produce oscillations, and the cost i 'of manufacture is correspondingly lessened.

As a closed circuit condition obtains in starting the oscillations, a high primary potential is not necessary, but a direct current source of energy of low voltage is suflicient to operate the apparatus efficiently, the high potential of the oscillating circuit being effected through gap il -wi and inductance ('1. Because of the features of low cost, lightg ness in weight, simplicity and possibility of operation with low voltage, the apparatus is specially suited'for portable sets, and for use in connection with moving bodies, such as aeroplanes, boats etc.

WhatI claim and ters Patent is 1. A wireless apparatus comprising a desire to secure by Let-' primary circuit consisting of an inductance,

the primary of a transformer, and an electromagnetic vibrator having its movable contact biased to close such circuit, and an oscillating circuit comprising a condenser,

said vibrator and-said transformer primary,

whereby, on the opening of the primary circuit, oscillations from said condenser are' produced in said oscillating circuit and extinguished by the vibrator gap.

2. A wireless apparatus comprisingv a circuit and extinguished by the vibratorprimary circuit consisting of an inductance,

the primary of a transformer, and an electromagnetic vibrator having a low frequency period of vibration and having its movable contact biased to close such circuit, and an oscillating circuit comprising .a condenser, said vibrator and said transformer primary, whereby, on the opening of the primary circuit, oscillations from sald condenser are produced in said oscillat ng of said vibrator being in a .selected ratio with respect to the frequency of the oscillating circuit.

4. A wireless apparatus having a primary circuit, comprising an inductance, an electromagnetic vlbrator having alowfrequency period of vibration and the primary of a transformer, and an oscillating circuit of radio frequency comprising a condenser, said vibrator and said primary.

' 5. A Wireless apparatus having. a primary circuit consisting of an inductance, an electromagnetic vibrator and the primary of a transformer, and an oscillating circuit comprising a condenser, said vibrator and said primary.

6. A wireless apparatus having a primary circuit consisting of an'inductance, an electromagnetic vibrator and tha primary ofa transformer, and an, oscillatlng circu-it of radio frequency comprising a condenser, said vibrator and said primary,'the period of vibration of the vibrator being in a selected ratio with respect to the frequency of the oscillating circuit.

7. A wireless apparatus havin a primary circuit containing a condenser c ar ng device com rising an electromagnetica ly actu ated osci lator, and an oscillatory circuit of radio frequency including a condenser and said oscillator, the period of vibration of the oscillator being in a selected ratio with, i

naraaeo vice comprising an oscillator, and an oscillatory circuit of radio frgequency including a condenser and said oscillator.

10. In an apparatus for producing electric oscillations an oscillating circuit, a vibrating electrode, and a fixed electrode in said circuit, and means whereby the period of vibration thereof may be of the same fre- 5 quency as the natural frequency of the oscillating circuit.

11. In apparatus for the roduction of electric oscillations the combination of an oscillator, of means associated therewith for producing oscillations having the characteristic of an undamped nature for a certam period, and a damped or quenched v nature for a further period, said means including an oscillatory circuit the inductance of which has a condenser shunted across it.

12. In an apparatus, the combination of a current supply,-an oscillator, an oscillating circuit containing an inductance and capacity, said inductance having a condenser shunted across it the natural frequency of the oscillating circuit being in a selected patio to the working frequency of the oscilator.

13. A wireless apparatus having a primary circuit containing a condenser chargng device com rising an oscillator, and an in uctance, an an oscillatory circuit including a condenser; said oscillator and the primary of a transformer.

14. A wireless apparatus having a pnmary circuit containing a condenser charging device comprising the winding and contacts of an electromagnetically actuated vibrator, and an oscillatory circuit comprlsing acondenser, said oscillator contacts, and

the primary of a transformer.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM DUBILIER. Witnesses: i

MITTIE Dow S'ro'r'r,

RoBnn'r' MILTON SPEARPOINT.

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