US1280705A - Apparatus for signaling. - Google Patents

Description

F. GARDNER.

APPARATUS FOR SIGNALING.

APPLICATION FILED JUNE 22.1917.

Patented Oct. 8, 1918.

FULTON GA RDNER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T E. GARDNER, OF PITTSBURGH, PENNSYLVANIA, AND ONE-FOURTH TO SEYMOUR STEDMAN, or CHICAGO, ILLINoIs.

APPARATUS Fen SIGNALING.

To all whom it may concern:

Be it known that I, FULTON GARDNER, a citizen of the United States, residing in Chicage, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Apparatus for Signaling, of

which thefollowing is a specification.

My invention relates to apparatus for operating'all kinds of electromagnetic signaling systems requiring any measure of electric current, said apparatus being ,.-responsive to'the impact of sound waves;

To this end my invention consistsin the novel devices and novel combination of parts or devices. herein shown and described and more particularly pointed out inthe claims.

In the accompanying drawings, which form a part of this specification Figure 1 is a vertical section of a device embodying my invention.

Fig. 2 is a plansection on line 2', of Fig. 1. The diagramshownin connection with Fig. 1, is one formof elec tromagnetic signal system operative with mylinvention.

ike numerals in both figures refer to identical parts.

3, in Flg. 1 and Fig; 2 the porcelain base and insulating part of an ordinary standard receptacle, such as used in electric light installations.- 4, in the same figure is the screw threaded metal part of the receptacle; 20 and 21, in both figures, are metal electric conductor parts with wire terminal screws insertedl 5, is a screw threaded metal part adapted to screwinto thepart 4. 7

part 5; 9,, is the wire spool'of an, electro-' wit 6, 1s a metal cap directly connected to' part 5, and supporting binding posts 13; 7, in- Figs. 1 and 2, is a porcelain part with an interior chamber and threaded upon its exterior adapted to screw into the metal et,and 10, is the core of the magnet the lower endextending through'an opening in the porcelain cup part 7 and it is shown in contact with the central electrode part2l of the receptacle. .11, is the upper end of the core 10', bored out through which to thread the lead wires from the magnet 9,- to the binding posts 13; 12, is a tube of insulating material surroundin the core part 11. 8, is a circular metal p ate in contact with part 5, and forming a cover for the cup 7. 8 ,'is a diaphragm andfifi are metal Specification of Letters Patent.

Patented Oct. s, 1918.

Application filed June 22, 1917. Serial No. 176,623.

points attached to the diaphragm 8. 14,15 finely divided. metal, suchas iron filings Within a recess, formed by the magnet core and the upper part of the electrode 20, thus completing the circuit through the parts 4, 5, 8, 8, l4, l0 and 21.

25, is a condenser bridged across the independent signal circuit, the purpose of which is obvious to persons skilled in the art.

In appearance,'the part of myinvention,

described in detail, is that of an ordinary lamp socket or standard receptacle, with a fuse plug, screwed thereinzuponwhich is a mounted two binding posts.

i The magnet 9, coherer'14, and diaphragm 8, withinthe chamber of the insulating part 7 are-movable. The plug part 6, 1 when screwed into the receptacle 4, the core 10,

will be in" contact with the electrode part 21; The proper ad ustment of the coherer granules 14, the diaphragm 8 and magnet 9, is obtained b regulating the compression by the screw 'tireaded plug into the correr f spondingly'threaded receptacle. 7

In operation my invention, assuming itis V properly installed, [at or near. a bank vault or safe, which it is intended to protect,the

sound caused by the blo of a hammer, other instruments, or explosion, would -vi-. ,brate the diaphragm of the microphone, the impulse ofincreased current would beam-. plified by the induction coil, the secondary; 1

winding of which is directly-connectedto the magnet. This in turn will energize the magn duction, causing the divided metal to cohere,

' thereby practically closing-the independentl 105'.

signal circuit and-causin the signal devices j to respond simultaneous y with the impact of the sound waves upon the diaphragm of the microphone. 1

et and-the metal filings in contact with the magnet will become magnetized by in-' i The diaphragm part 8 mounted above the magnet will act. as an armature of the magnet, the points 8 carried by this arma: ture extend down into the cohering metal.

When the electromagnet is demagnetize d, the diaphragm-armature will return to Its.

normal position, and the metal points carried by the armature will likewise react and disturb. the metal particles causing decoherence, and thereby open the independent signal circuit. It is a ell known fact that metal finelydivided is an electric conductor of-enormous resistance, but when caused to cohere b electromagnetic induction the retively low potential. The. function ofthe coherer as used in my invention is similar to that of a switch to make and break a relayed independent circuit and energize and actuate signaling devices, such as electric lamps, bells, gongs, spark coils, telegraph Sounders, etc. marine signaling.

It should be understood that the struc ture described by this specification is illustrative only and for the purpose of making myinvent1on more clear, and that Ido not regard the invention as limited to any of the particularities of construction chosen for purposes of illustration, except in .so far 'as I-have included such limitations within the. terms of the following claims.

What I claim is: 1. relay of the class described ce' sistance 1s greatly decreased, and will admit the passage of electric current Of compara- It is also my purpose to use it in sub-.

ing a receptacle and a plug in electric contact-one with the other a magnet within said plug, the winding of .said magnet in circuit with a microphone and a source of potential, means within said plug operable pendent electric current for the purpose specified and substantially as described.

I 2. In a relay of the class described a screw threaded plug adapted to fit a screw threaded socket, an insulating cup within the'screw :40 by said magnet to relay and control an indethreaded part of said plug an electromagnet within s aid c'up and an elongated core of tending'th'rough an opening in the bottom of said cup, and means to adjust said magnet in relation to its armature;- said armature formin a cover of said cup, and in contact with t e threaded part-of said plug, for the purpose intended and substantially as described. 3. A relay comprising a screw threaded insulating part and a screw threaded .metallic part by which said insulating part :and said metallic part are held together and acap piece covering both of said parts with binding posts mounted thereon through which electric current is transmitted to the winding of the relay magnet within said insulating part, and means to conduct a relayed electriccurrent through the core of said magnet.-

. FULTON GARDNER. Witnesses: MARGARET S. MACCARTHI,

EDYTHE PRUNK.

said magnet comprising an electrode ex-

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