US1915518A - Synchronizing system - Google Patents

Description

June 27, 1933. CONNERY 1,915,518

SYNCHRONIZING SYSTEM Filed Dec. 23, 1931 INVENTOR ALDER E CONNERY ATTORNEY Patented June 27, 1933 STATES PATENT nnnnn r. oonnnny, or nn-ooKLYn, NEW YORK, ASSIGNOR TO INTERNATIONAL COIVL MUNICA'IIONS LABORATORIES, INC., on NEWABK, nnw JnnsnY, a conronarron on NEW roan SYNCHRONIZING SYSTEM My inventionrelates to telegraph systems, and more particularly to a typeof corrector system foruse with synchronoustelegraphy.

Telegraph systems of this type usually comprise two or more commutators or distributor's with means for maintaining the brushes of said distributors in synchronism witheach other.

As is well known in the .art, when the brushes'at the receiving end of asynchronous telegraph system are out of phase with those at the transmitting end, it is necessary to providemeans for stepping the brushes back into phase at frequent intervals.

The object of my invention is to provide a simple correcting system which will function to step the brushes back at frequent intervals by utilizing the si nalling impulses, thereby eliminating the loss of transmission time. v In order to accomplish the correcting reemploy a differentially wound looking relay which is controlled in part by the line relay responsive to the transmitted impulses, and in part'by the co-operation of certain mechanical partsjassooiated'with the distributors 1 I Various features of my invention will be pointed out-in the description to follow.

The single figure in the drawingshows the preferred embodiment of my invention.

Referringto the drawing: A drive shaft do for the distributor, driven by means not shown, carries a fly wheel 50 and a freely rotating brush carrier 47. The

a brush carrier has a gear wheel lSformed integral therewith, which meshes with a. pinion 39 secured to a short shaft which is journalled in a control disc ll operatively secured to shaft by any suitable means such as pin l2. The other end of the shaft-4O has a star wheel 46' secured. thereto which is prevented from rotating by a spring actuateddetent roller 49 carried by control disc 4.1. The magnet 15 is provided with an armature 17 which, when operated, bringsthe pin lSintothe path of star wheel 46. l

The arm 13 is controlled by a projection 44 on the disc ll for controlling the circuit of magnet 15.

Apolarized line relayis shown. 1, the

tongue of which is connected to the winding of polarized relay 2. The tongue of relay 2 follows the received line signals. When the tongue of relay 2 is resting against its spaclng contact S, the condenser 3 will be discharged through resistanceel. W hen a marking signal is received, the tongue of relay 2 will move over to the marking contact M and the condenser 3 will be charged from battery 5. The charging current for condenser 3 will always flow through the windings of locking relay 6, If the brush 7 is inproper phase relation with the received signals, then brush 7 will be on the B segments at the instant the tongue of relay 2 arrives at its marking contact, and the charging circuit of condenser 3 will be as follows: from battery 5, through condenser 3, marking contact M, windings 8 and 9 of relay 6',seigment B, brush 7, and thence through solid ring 10 toground. It

should be noted that the charging impulse goes through windings 8 and 9 in series and that these windings are connected in opposition. Since windings 8 and 9 have an equal number of turns, it will be apparent that the armature 11 of relay 6 will not be operated.

The resistance of windings 8 and 9, however,

limits the charging current of condenser 3 and thereby prevents damage to the contacts of relay :2 or the distributor segments and brushes. .vVhen the brush 7 is out of phase with the received signal, the brush will be on the A segment at the instantthat the tongue of relay 2 arrives at itsmarking contact.

The path of the charging impulse of condenser 3 will be as follows: from battery 5,

through condenser 3, contact M, winding 8 of relay 6, segment A, brush 7, solid ring 10, and thence to ground. Since the charging current, in this case, passes through only one winding of locking relay 6, the armature 11 will beattracted and the relay will lock up through the following circuit: ground, battery 12, contacts 13 and la, winding of corrector magnet 15, tongue 11, winding 16, and thence to ground. The energization of magnet 15 will attract armature '17 which will cause the pin 18 to be placed in the path of star Wheel 46. At a certain point in the revolution of the distributor the pin 18 will engage the star wheel 46 and cause the brushes to be'stepped back a small amount, which will tend to put the brushes into the proper phase relation with the received signals. Immediately after the pin 18 has engaged with star wheel 46, contacts 13 and 14Ywill separate momentarily, thereby-unlocking relay '6. and die-energizing C-Ol'lOClJOl magnet 15. It

should bementioned at (this time that the cam which operates the unlocking contacts is not shown in the proper position with relation tostar wheel 46, but is merely shown in this position for convenience. It should be kept in mind that the brushes of the distributor are normally running a trifle fast and it isnecessary that the brushes be'stepped back at occasional intervals.

What'is claimed is:

'1. In a telegraph system, the combination ofa line relay for receiving impulses of different characteristics, a condenser, a distributor normally rotating, a circuit arrangement whereby said condenser is charged by; a change of impulses received by said line relay, a corrector relay provided with. two windings, and circuit arrangements whereby said condenser charges through bothof said windings when js'aiddistributor is rotating normally and charges through but one'of said windings when said dlSliIlbllt-Ol is rotating abnormally.

2. In a telegraph system, the combination of a rotating distributor, acorrector relay provided with two windings, a source of charging current, means for causing said charging current to fl ow through both wind,

ings of'said 'corrector relay when said'distributor is normally rotating and for causing charging current to flow through but one of said windings when said distributor is rotatingabnormally,

3. In a telegraph system, thecombination "of a rotating distributor, a differentially wound'correctorrelay, a condenser -and a sourceof' charging current therefore asso ciated with said relay, means for causing charging current to flow through the windingsof saidrelay in series opposition when distributor is correctly phased, means for causing charging 'c'urrentto flowthrough only one of said windings when said distributor is incorrectly phased, and. mechanical means under cont'rol'of'said difierential relay to correct said distributor phasing when a single winding only of said diiferential relay is energized. I g y 4. In a synchronizing system for telegraph apparatus, adistributor comprising a rotatng contactor and fixed Corrector contacts operatively associated therewith, a driving member for said contactor, mechanical means for angularly displacing said rotating contactor in respect to said driving means, a differential relay having, its windings con nected in series opposition when said rotating contactor connects certain of said fixed corrector contacts and having a single winding in circuit when said contactor connects other of said contacts, and means for operating said mechanical means when said difierential relay is operated, said operation resulting from a current flow through one winding only of said relay.

5. In a synchronizing system, a distributor' comprising rotatable brushes, solid and segmented contact rings associated therewith, and a driving means for said brushes, and means for adjusting the position of said brushes in respect to said driving means, said last-mentioned means comprising a differentially wound relay controlled by the position of said brushes on said contact rings, said relay having a current flow therethrough at all times at which adjustment of said brushes is possible, said current flow being I ineffective to operate said relay when adjustment is unnecessary. v i

, 6. A synchronizing system for telegraph apparatus, comprising a signal receiving relay, a polarized relay connected thereto and operated thereby, a distributor comprising solid and segmented contact rings, rotating brushes and driving means therefor, a'diff-erentially wound relay having its difierential windings connected in series with multiplied odd segments of said segmented rings and a singleone of said difierential windingsconnected to multiplied even segments of said segmented rings, mechanical means adaptedto adjust the angular position of said brush with respect to said driving means said differential relay and associated mechanical means being: unoperated" thereby.

' 7 .In a system for maintaining synchronism between twoelectrically remotely located rotatingbodies, driving means for said bodies one of said driving meansnormally rotating more rapidly than the other, a line,

means for transmitting signals over said line at a speedregulated by said slower rotating body, areceiving relay operated by said signalsfapolarized relay operated by said receiving relay, a differential relay operatedby current flow through a single winding thereof when said rotating bodies are electrically angularly-displaced with respect to 'each other and said polarized relay armature is lying on one of its contacts, said dif- "at afix'ed point in the cycle of the latter, a I

said solid ring and one of said odd segments,

ferential relay being unoperated by a current flowing through both its windings when said rotating bodies are in phase, and mechanical means controlled by said differential relay for altering the angular displacement of said faster rotating body in respect to its driving means to phase the slower and faster rotating bodies.

8. A synchronizing system for telegraph apparatus, comprising a polarized relay operable in accordance with received signals, a distributor comprising Corrector contacts and a contact brush, driving means for said brush, means for angularly displacing said brush with respect to said driving means, a difierentially wound relay in circuit with said po larized relay and said corrector contacts, said differential wound relay having its windings connected in series opposition when correction is not needed and having a single winding in circuit when correction is needed, and a corrector magnet cont-rolled by said dilierentially wound relay and operated only when said differentially wound relay has current flowing through but a single winding.

In witness whereof, I hereunto subscribe my name this 22nd day of December 1931'.

ALDER F. CONNERY.

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