US1275902A - Electric signaling apparatus. - Google Patents

Description

J. J. GHEGAN.

' ELECTRIC SIGNALING APPARATUS.

APPLICATION FILED DEC. 20,1916- RENEWED JULY 3.1918.

1,275,902. Patented Aug. 13, 1918.

LL E 3 man 14km *onT STATES PATENT. OFFICE,

JOHN J. GHEGAN, or EAST ORANGE, NEW JERSEY;

ELECTRIC SIGNALING APPARATUS.

Specification of Ietters Patent. Patented Aug.- 13,1918.

Application filed December 20,111 916, Serial no. 137,934 Renewed my s, 1918. Serial No. 243,250.

To all whom it may concern: 7

Be it known that I, JOHN J. 'GHEGAN, a citizen of the UnitedStates, and resident of East Orange, Essexj'county, New Jersey, have 'made'certain new anduseful Improvements in Electric Signaling Apparatus, of

fwhich the following is a specification.

This invention relates to electro-magnets for use in a signaling circuit, as at a station on a telegraphline, and the 'objectis to, substitute the alternating current from a main supply circuit for the local batteries heretofore employed. These 'batteries,'as is well known, have long been in use, and con sistoftwo or three cells, usually of zinc and copper elements, in an exciting solution;

they require cleaning and renewal,fan d the price of zinc and copper has so far advanced that a substitute is in demand. I I

The invention applies the improvement in a relay, a sounder or" recorder, or any electro-magnetic device} of similar character, and preferably employs a solenoid coil and tubular core; the reciprocating and preferably pivoted bar is capable of to-and-fro movement between stops, witha retracting device, like an adjustable helical spring. This bar has independent movement and is controlled by an actuator having' independent'movement. The actuator moves with the tubular cores of the solenoid, and when at rest and circuit is closed, this actuator is entirely out of contact with the bar and free to vibrate under the influence of the alternating current, to a degreeslight and almost imperceptible, but as the actuator is practically free and clear from the bar, these vibrations of the actuatorare immaterial. When current isbroken or cut oii in ,any Way, the actuator, under the influence ofits retractor, moves upward and'impacts with thebar and the bar strikes its upper fixed limit stop; "when circuit is closed again,-the actuator is drawn down against the influence of the spring, and the bar, assisted by "a compression spring 1 acting against the force exerted by the first-named spring, strikesits lower limit stop, while the actuator, continuing its downward movement, leaves the bar and takes up an independent, separated position, where any such chattering resulting from current alternations, is ineffective.

A sounder is referred to in the foregoing actuator may be secured.

invention.

In Fig". 1, the

description, but a relay or repeating sounder is adapted to the same construction. 7

M The ad ustable contact carried by the 'bar bar is used to limit and establish the extent of space through whichthe' actuator is free to vibrate without impartingits vibrations to the bargwhereby the best position of the The accompanyingdrawings illustrate the bar, the adjustment'for said spring, the adjustable stop carried by the bar and the sliding pin passing through the bar. Fig.

3 shows a public supply alternating current circuit with step-down transformer, supplying lamps and local'battery current at a telegraph station, and a local circuit containing a sounder operated by arelay on a telegraph circuit; 4 V

Morse sounder, s, has two solenoid coils, 9 and 10, fixed onfa metal base, '11; thebar, a, has'trunnion bearings at 12mm 13'; there is a metal pillar, 14, fixed, on base 11," and binding posts, 15, 16,

for coil terminals on wooden base, 17. The

support, 18, for the two bearings 12, 13, is also supported on metal base 11. The'actuator, "20, is of thin'metal, and the magnet is made as free from hysteresisas possible; there are two soft iron tubular cores, 0, which reciprocate in the solenoids. to the extent substantially as shown. There is a pin, p, firmly fixed to actuator 20;,this pin 19 passes through a perforation in adjustlng screw 21 and has a retracting spring, 22, supporteclby adjusting screw,'23 screw 23 is supported on bracket, 24, and bracket 24 is fixed to support, 18. .The bar a is depressed by adjustable compression spring, 25.

is adapted to vary the point in the upward movement of the actuator where the actuator'inakes' impactwith the bar, or, in other "words, the adjustable stop carried by the When relay 7 is on its front contact transformer, and actuator 20 is drawn down out of engagement with adjustable stop 21,

carried on bar a, actuator 20 vibrates or chatters slightly, and almost imperceptibly, but to an immaterial extent, and spring 25 holds barj'a on, itsdown-contact, 32; contact stop 32 engages post 14, while pin 79, sliding through stop 21, permits'the described movement. When relay r is on its back contact, local circuit 30 is open, spring 22 retractsactuator 20, and, with an impact, actuator 20 strikesscrew stop 21 on'bar a, and bar a strikes its upper limit or back stop' 33. dashes of the Morse alphabet are transmitted by key 70,- the bar a strikes stops 32 and 38 alternately in exact conformity with key movements, and the sound resulting vsharplydefines'dots and dashes as transmitted. Y i

' VVhat'I claim is 1 In an electromagnetic signaling device the combination of an electromagnet, a pivoted, rigid contact bar, a retractor therefor, a rigid, resonant back stop for said bar, an actuator for said bar, means whereby said actuator, under closed circuit conditions, moves 1 with said bar and a fixed contact stop in position to arrest said bar and pei mit said actuator to disengage itself.

2. In a; Morse code signal receiving device the combination of'anelectromagnet, a reciprocating member, an. actuator therefor controlled bysaid magnet andlocated be tween said member and magnet, a spring re tractor for said member, a spring retractor for said actuator, means whereby when circuit is closed, said member and said actuator move in engagement, and'a fixed contact stop, in position to arrest said member at an intermediate point in said movement. a 3. The combination Of'iLIl electromagnet, a pivoted, reciprocating bar, fixed, rigid, front and back stops therefor, an actuator reciprocating intermediate said bar and magnet, a. retractor common to, both bar and actuator, an alternating current circuit for said magnet, a circuit breaker in said circuit and means whereby said actuator and bar move in engagement in one direction and move in engagement and then separate at an intermediate point, on the opposite movement. 1 a v 4. The combination of an electromagnet, a pivoted, reciprocating I bar, 'fixed front andback stops therefor, an actuator reciprocating intermediate said bar and magnet, a retractor common togboth bar' and actuator, an alternating current circuit for said magnet, a circuit breaker in said circuit and means whereby said actuator and bar move in engagement under open circuit condi- Copies of this patent may be obtained for It results that when dots and tions, and move in engagement and separate when the bar reaches a fixed contact stop, under closed circuit conditions.

5. The combination with an alternating current circuit and means for making and breaking said circuit, of an electromagnet,

a pivoted, reciprocating, resonant bar, a reciprocating actuator for said bar, and means whereby actuator and bar move together under open" circuit -coiiditions and move together and separate when said bar engages a fixed contact stop, underclosed circuit conditions.

6'. In a code telegraph receiving magnet the combination with an alt rnating current circuit and acircuit breaker therefor of an electromagnet in said circuit, a reciprocating member; fixed, up and downfcon tacts therefor; an actuatorto control said memher in response toboth open and closed circuit conditions, and means whereby actuator and bar, move in engagement on open circuitand move together 'and then separate on closed circuit, V

7. In a code telegraph receiving magnet the combination with an alternating current circuit and a circuit breaker therefor o'f-an electromagnet in said circuit, a reclprocatiiigbar, a reciprocatingactuator, two opposite stops therefor, and'j'means wherebysaid bar and actuatormove together to engage one sto p when circuit is open, and move together but separate when said bar engages itsopposite stop and circuit is closed.

8. The combination'in an electromagnetic signal deviceof analternating' current circuit, and acircuit breaker therefor of an electromagnet, a pivoted reciprocating, rigid bar, a separate actuatortherefor, aretractor common to both',;a retractor adapted to oppose said retractor incontrolling said bar, aniup contact stop forsaid bar' and actuator, a down contact stop for said bar, and means wherebyfsaid actuator is at; tracted to said magnet, moves with said bar, and leaves said bar when it engages the fixed down contact,

9. In a receiving magnet for a code telegraph the combination with an alternating current circuit and a circuit breaker therefor of an electromagnet insaid circuit,a re'- ciprocati'ng, pivoted rigid member, a reciprocating actuator, front and back limit stops for said member and means whereby said actuator, "under closed circuit conditions, takes'a' position out of engagement with said bar. i

In witness whereof ,I have signed my JOHN J ennean.

five eents each, by addressing the Commissioner of Iatents, Washington, I). C. I i

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