Патент USA US2117820код для вставки
May 17, 1938. 2,117,820 B. E. O’HAGAN ELECTRICAL RELAY Filed NOV. 8, 1935 1 a], c % m Mmmwa B2 FA'I.ATE M R :25: a 5 0 A. 5,2» M W a.” Ms”.- \ J~ f41v\/1Q2TS + 2R5: 0ir k1 w £29 vcA f _ B 4 4.1 D>8L[P9,MY§J‘8 ,wM %m@ Jw :5;ZR w m 5 M F; w! .m lab b1u5%,1b? .wa X‘L b\p w aQ15 u1 I1.0/1 )71 W D 5 3 5 m T . Tw 11a F @ 5 p. Cr g c ,5 T CHETm 0 b a INVEN’TOR Bépnapd E. 0H0 an . BY HIS ATTORNEY 2,117,820 Patented May 17, 1938 UNITED- STATES PATENT OFFICE 2,1 17,820 ELECTRICAL RELAY Bernard E. O’Hagan, Swissvale, Pa., assignor to The Union Switch & Signal Company, Swiss vale, Pa., a corporation of Pennsylvania Application November 8, 1935, Serial No. 48,884 1 Claim. (Cl. 171-419) My invention relates to electrical relays, and particularly to relays of the type known as de coding relays for use in apparatus for controlling wayside and cab signals by means of coded track S circuit current. One feature of my invention is the provision of a novel and improved decoding relay which has no moving parts. ' Other features of my invention will become 5 apparent as the description proceeds. I will describe one form of relay embodying my invention, and will then point out the novel features thereof in the claim. The accompanying drawing is a diagrammatic F View showing a railway signaling system includ ing a relay embodying my invention. Referring to the drawing, the reference char acters l and In designate the track rails of a stretch of railway track over which tra?ic nor mally moves in the direction indicated by the arrow. These track rails are divided, by means CT-IBII is constantly supplied with current from a suitable source the terminals of which are indi cated by the reference characters B and C, and this coding device constantly opens and closes its contact l5 at the rate of 180 times per minute. Cl The coding device CT-TS is likewise constantly supplied with current from the terminals B and C, and constantly opens and closes its contact H5 at the rate of 75 times per minute. It will be seen, therefore, that when the relay H of a sec 10 tion is picked up so that its front contact l'l-—l‘|a is closed, the rails of the section next in rear will be- supplied with alternating current which is periodically interrupted or coded at the rate of 180 times per minute, but that, when the relay H of a section is released, so that its back con tact l l-l'lb is closed, the rails of the section next in rear will then be supplied with alternating cur rent which is periodically interrupted or coded at the rate of '75 times per minute. The I80 code is used to provide a proceed indication and the 15 of insulated joints 2, into a plurality of similar ‘ code is used to provide the caution indication, track sections, only one of which, 3—4,' is shown in a manner which will be made clear as the complete in the drawing. Tra?ic entering each description proceeds. Each relay H is controlled track section is controlled by a signal designated by traf?c conditions in the associated section in 25 a manner which will also be made clear as the by the reference character S with a distinguish ing exponent corresponding to the location. These signals may be of any suitable type but, in the form here shown, these signals are of the color light type, and each comprises a red lamp R, a yellow lamp Y, and a green lamp G, which lamps,_ when illuminated indicate “stop”, “cau description proceeds. Each track section is provided at the entering end of the section with what I shall term a de— coding relay of the saturation type, designated by the reference character DR, only the relay DR associated with section 3-4 being shown in the drawing. This relay embodies my present inven tion, and in the form here illustrated comprises a main core 6 of the three-legged shell type, and 35 are means for supplying to the rails of the asso ciated section coded alternating current, the code an auxiliary C-shaped core 1 which is separated from the one outside leg 6% of the core _6 by a frequency of which is controlled by tra?ic condi tions in advance. These means form no part~ pair of air gaps 8. The main core 6 is provided of my present invention and in the well-known with a primary winding 9 consisting of a single 40 form here shown comprise a track transformer coil disposed on the leg 6“; with an input or satu designated by the reference character T1‘, with a ration winding l0 consisting of two coils Ill‘1 and distinguishing exponent, the secondary of which lob disposed on the two legs 6b and 6°, respec tively, and connected in series in such manner is constantly connected with the rails of the asso elated section in series with the usual current that current flowing in these two coils will cause 45 limiting impedance 5, and the primary of which a ?ux to circulate around the closed path formed is connected with the terminals BX and CK of a by the associated legs but not in the path includ suitable source of current, not shown in the draw; ing the leg 6“; and with a secondary or output ing, over the contact I 5 of a coding device CT-IBII, winding ll consisting of two coils H8 and llh disposed on the two legs 6*’ and 6°, respectively, or the contact 16 of a coding device CT-15, ac and connected in series in such manner that the 50 50 cording as the front contact I'I—|'|“, or the back contact l‘|-—l‘lb of a relay H which is associated voltages induced in these two coils due to ?ux with the section next in advance is closed, only from the primary winding 9 are additive. The the coding devices CT-‘i5 and CT-l80 and the auxiliary core ‘I is provided with a secondary or relay H3 which is associated with the section 34 output winding I2 consisting as here shown of a tion”, and “proceed”, respectively. _ Located at the leaving end of each track section being shown in the drawing. The coding device single coil. 55 2 2,117,820 The primary winding 9 of relay DR. is con— stantly connected with terminals BX and CK or seen, therefore, that when coded current is be ing supplied to the decoding relay DR, both por the alternating current source, and it will be tions l38L and l3b of the primary of the decoding apparent that“ with the two coils Ill8 and Illb transformer DT will be supplied with direct cur of the input winding l0 arranged in the manner rent, which current will flow through these por just described. the flux due to the current ?ow tions in opposite directions, but that, during the ing in the primary winding will normally not “on” period of the code, the current which ?ows induce any net voltage in the winding ill since in the portion I3‘) will be considerably larger the voltages induced in the two coils of this wind than that which flows in the portion [3* where 10 ing will be equal and opposite. The input wind as, during the “off" period of the code, the cur ing I0 is energized from the associated track rent which flows in the portion i3m will be con section 3—4 through the medium of a relay siderably larger than that which ?ows in the transformer RT which insulates the winding It portion I3". It follows, therefore, that whenever from the track rails, and a recti?er RI which coded current is being supplied to the decoding 15 converts the coded alternating current received relay, an alternating current will be induced in from the rails into pulses of unidirectional cur the decoding transformer DT in substantially the rent in winding ill. The parts are so propor same manner as has been accomplished hereto tioned that during the “on” period of the code. fore by a decoding relay having a moving con the recti?ed current in winding ill will saturate ’ tact, and that this alternating current will have 20 the portion of the main core on which the sec a frequency which depends upon the code fre ondary winding Ii is wound, so that this por tion of the core'will have a ,high reluctance for the primary flux. The primary ?ux will then have a path of lower reluctance through the air 25 gaps 8 and the auxiliary core ‘I, and the voltage induced in the secondary winding 12 will there fore be relatively high while that induced in the quency. secondary winding II will be r/élativeiy low. During the “off” period of the code, however, the 30 input winding I0 receives no current, and under these conditions, the portion of the core on which the secondary winding II is wound will form a 40 lower reluctance path for the ?ux from the pri mary winding than the path through the air gaps 8 and the auxiliary core ‘I, thus causing the voltage induced in the secondary winding Ii to be relatively high, and the voltage induced in the secondary winding I! to be relatively low. In order to reduce the power which is required to saturate the relay core 6, the two legs 6” and 6c of this core may be'provided with portions 20 of reduced cross sectio" between the input or saturating winding l0 and the secondary winding H in themanner shown. With the core 45 constructed in this manner, the current which must be supplied by the track circuit need only be large enough to saturate these portions of reduced cross section of the core, and need not be large enough to saturate the complete mag 50 netic circuit. When the portions of reduced cross section of the core are saturated, these portions of the magnetic circuit are. in effect, two large air gaps which have a greater reluctance than the reluctance of the physical air gaps 8 between‘ in i;l the auxiliary core and the main core. With the ordinary three-leggedtype of saturation relay, it is necessary to saturate a complete magnetic cir cult, which must be large in order to provide high is not saturated. \ The decoding transformer DT supplies energy to the relay H3 for section 3-4 through the me dium of a secondary winding l4 and a recti?er R4. Relay H3 is a direct current. relay and is so 25 designed that it ‘will remain energized whenever transformer DT is receiving energy from either the 75 or the I80 code. The decoding trans former DT for section 3-4 also supplies energy to a direct current decoding relay. J3 which is 30 connected with a portion of the winding of the decoding transformer through a decoding unit DU-IBO. The detaim of construction of the de coding unit DU-l?ii are not shown in the draw ing, but this unit usually comprises a recti?er - and a reactor condenser tuning ‘unit for tuning relay J3, whereby this relay will be energized when and only when the I80 code is being sup plied to the decoding relay. When relays H3 and J3'are both energized, a 40 circuit is completed for lamp G of signal S3, which circuit passes from terminal BX of the source through front contact Iii-l8“ of relay H3, front contact I 9-H“ of'relay J3 and the ?l- _ ament of lamp G to terminal CX. When thisv circuit is closed, lamp G is lighted and under these conditions signal S3 indicates ' proceed. When relay H3 is energized and relay J3 is de energized, lamp Y of signals3 then becomes lighted by virtue of a circuit which passes from 50 terminal BX through front contact Iii-l8It of relay H3, back contact l9---i9b of relay J3 and the ?lament of lamp Y to terminal X, and under these conditions, signal S3 indicates caution. When, however, relay H3 is deenergized, lamp R of signal S3 becomes lighted by virtue of a circuit which passes from terminal BX of the source through back contact |8--|8b of relay Hg and the ?lament of lamp R of signal S3 to terminal impedance to alternating current when the core 60 20 p _ X. thus causing this signal to indicate stop. The current which is induced in the secondary The operation of the apparatus as a whole is winding ll of the decoding relay DR is recti?ed as follows: Section 3-4 will be supplied with the by an associated recti?er RF, and is impressed -' i8. code or the-‘l5 code according as'the section across a portion l3“ of the primary winding of next in advance is unoccupied or occupied. When 65 an associated decoding transformer DT in such section H is supplied'with I" code and no train 65 manner that this current will ?ow through the ' occupies this section, all parts will occupy the po [portion l3“ from left to right, as indicated by ‘the arrow. The current induced in the sec ondary winding l2 of the decoding relay DR is likewise rectified by an associated recti?er R3, and is impressed across another portion l3!’ oi.’ the primary‘winding of the associated decoding transformer ‘DT in such manner that this cur rent will ?ow through. the portion l3b from right 75 w left, as indicated by the arrow. It will sitions in which they are shown in the drawing. That is to say, relays H3 and J3 will both be ener gized, the circuit for the proceed lamp G of signal 83 including contact lS-l ll of relay H3 and con w tact l9-—l8l of relay J3 will be closed, thus caus ing this lamp to be lighted so that the signal will indicate proceed, and the circuit for the primary of transformer '1‘? including front contact I'l--i'la of relay H3 and contact ii of coding de- 75 3 9,1 17,880 vice CT-‘Jll will be closed. so that the section next in rear 01' section 3-4 will also be supplied wan is] code. _ When section 3-4 is supplied with the ‘II code and no train- occupies this section, relay H‘ will remain picked up but relay JJ will become re leased, thus causing signal S3 to indicate caution. The rails oi’ the section next in rear of section 1-4, however, will continue to be supplied with ill code in the same manner as when section 3-4 is supplied with the l" code and no train occupies this section.v ' When a train enters section 3-4, the train will shunt away'coded current from the coding 16 apparatus, and relays H3 and J3 will then both become released, thus causing signal S1 to indi cate stop, Furthermore, with relay Ha released, the circuit for the primary 0! transformer '1'!“ including back contact i'I----l‘_lh of relay H3 and 20 contact it of coding device CT-fli will now be closed, thus causing the rails oi’ the section next in rear of section 3-4 to be supplied with the only one form of decoding relays embodying my invention, it is understood that various changes and modi?cations may be made therein within the scope of the appended claim without depart ing from the spirit and scope of my invention. Having thus described my invention; what I claim is: A relay oi the saturation type comprising a main three-legged‘closed core of the shell type and an auxiliary C-shaped core which is sepa rated from one leg of said main core by an air gap, a primary winding disposed on said one leg of said main core and normally supplied with alternating current, a saturation winding com prising two coils disposed respectively on the two remaining legs oi’ said main core and connected in series in such manner that any voltages in duced therein‘due to ?ux from the primary wind ing will oppose each other, a ?rst secondary wind ing comprising two coils disposed respectively on said two remaining legs of said main core and connected in series in such manner that any voltages induced therein due to ?ux from the . It should be particularly pointed out that while primary winding will be additive, said two re in describing a relay embodying my ‘invention, I maining legs at said main core being provided have shown it applied to apparatus for control— , with portions of reduced crow section between the ling wayside and cab signals by means of coded two coils of said saturation winding and the two track circuit current because of its particular coils of said ?rst secondary winding to reduce the adaptability for this purpose, my invention is of ' current which must be supplied‘ to said saturation general application and may be used wherever a winding to saturate said two remaining legs of ‘II code. relay which functions in the manner described said core, and a second secondary winding dis is needed. posed on said auxiliary core. ' ‘Although I have herein shown and described BERNARD E. O’HAGAN.