USRE14326E - Absolute permissive automatic block-signal system - Google Patents

Description

w. W. SALMON & F. L; DODGSON. ABSOLUTE PERMISSIVEAUTQMATIC BLOCK SIGNAL SYSTEM.

APPLICATION FI'LED DEC: 12. I916.

Reissued July 10, 1917.

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ABSOLUTE PERMISSIVE AUTOMATIC BLOCK SIGNAL SYSTEM. APPLICATION FILED DEC. I2. 1916.

Reissued July 10, 1917. I v 14,326.

3 SHEETSSHEET 2- WILMEB w.- satloll' inn mm UNITED Q P TEN OFFICE f.

L. nonoeon.lor-nocnns'rnn, NEW YORK, ASSIGNOBS r GENERAL mILwaY SIGNAL comrm; or earns, new YORK, A CORPORATION 0! NEW YORK. a

ABS LUTE Original No. 1,174,939,

" To all whom it may concern? Be it known that we,

and FRANK L. Doooson, citizens of the United States, and residents of the city of Rochester, in the county of Monroe" and State of New York, have invented certain new and useful-Improvements in Absolute The object of the ti n,

Permissive Automatic Block-Signal Systems, of which the following is a full, clear,

by the ordinary closed track circuits commonly systems and adapted to secure head-on protection from' passing siding to passing siding, with blocks for following train moves as short as track conditions require. I SO far as known to us prior to our invena greater part, if not all of thesingle I trackrailroads in use have employed the has the same protection for following trains" as for head-on trains.

site direction; but it" will ordinary automatic block signal system in which a train entering the block from either direction gives the same indication and thus been made to attain the results attained by our invention, but, so far as known to us,- none of the systems proposed were adapted to be operated by the ordinary closed. track circuits in common use on railways and all of them involved using additional andcomplicated apparatus or circuits, and making the operation of the signals for following movements more or less dependent u on the operation of signals gover'ninghea -on movements.

Primarily, the invention may be termed a unit system in that our means are adapted to be located at and operated by any track circuit controllin a signal governin'g traflic in one direction without regardto signals governing thetraflic in the o pobe underst WmmnWl Salmon used in automatic block signaling Many attempts have unm'ssm atr'ron mc' nLocx-sIenAL srs'rnn.

7 Specification of Beissueil Letters Patent. Rei ssued July 10, 1917. dated larch '7, im m Io. emcee, and February 7,1911. application for reissue filedheeeinber 12, nc. swarm. 136,572, 1

' course, that in the' practical embodiment of-our invention'the usual signals govern ing head-on protection are employed. I

In carrying out our invention, we preferably employ be Opened by sections of a block and a cuit adapted to be closed only by'a train which enters the block from one direction, bothof these circuits beingl operated by the ordinary closed track circuit sections in common use on railroads.

This invention will be more fully described hereinafter with referenoe to the a signalcircuit adapted to v a train onthe track circuit further signal cirforms thereof herein illustrated and which v we have selected as examples for the purpose of explaining the principles involved,

it being understood that the invention maybe embodied in variousforms and arrangements of apparatus.

In the accompanying drawings-like ref-' erenoe characters denote corresponding parts throughout the several views, n

which: v

Figure 1, illustrates diagrammatically the circuits and apparatus of one form 0 our invention applied to a railway. 'Figs. 2 and '3 illustrate diagrammatically' modified forms of our invention.

0mtmwtz'on.Referring to'Fig. 1, 1,2, and 3 designate track circuit sections, separated by means of insulating joints 4; 1', 2'

and 3' designate track batteries for creating a difierence of potential between the two rails of the track; 1, 2 and 3 designate relay coils normally energized by current flowin'g therethrough due to the difl'erence of potential created by the track batteries; 1 designates a relay armature held normally in the upper position as shown by reason of the currentflowing in relay, coil 1'; 2'

mally in the upper position shown by reason of current in relay coil 2 3 likewise dosi nates the armature of relay coil 3' normal y held in the upper position; 5 designates a semaphore as does likewise 6; 5' and 6' designate the electric motors for movin semaphores 5 and 6 respectively; 5' and 6 designate the bold clear devices for holding t e semaphores 5 and 6 respectively in their moved position; 5' designate 'and 2 likewise designate armatures nor metallic arms moved in unison with s'emaphore and designed to at times make contact With-metallic strips 5 and 5", the arm 5 making contact with metallic strip 5 at 5 the 45 position of the semaphore and for a few degrees on either side of such 45 position, the arm 5 making contact with metallic strip 55 at the zero or danger position of the semaphore and during the whole movement of the semaphore except the last few degrees; 6, 6* and 6 designate metallic arms moved in unison with semaphore 6, the arm 6 designed to make contact with metallic strip, 6 at the 45 position of the semaphore and for a few degrees on either side of said 45 osition, 6* making contact with 3 metallic strip 67 at the zero or danger position of the semaphore and during the whole movement of the semaphore except the last few degrees, 6 not makin contact at the zero or danger position 0 the semaphore with metallic strip 6 but making contact therewith as soon as the semaphore has moved a few de rees and. remaining in contact therewith uring the whole of the remainder of the movement of the semaphore;

8 designates a relay coil which when current passes thcrethrough causes armature 8' to be held in its upper position; ,7 designates a relay coil whlch when a current of sufficient value passes therethrough will .draw armature 7' to the upper limit of its movement; 9 designates a resistance which is of such value that it will allow suflic'ient SB'c'urrent to pass thercthrou'gh to sufficiently I energize coil 7 so that it will hold armature 7 in its upper position if already there but "will not allow suflicient current to pass therethrough to sufficiently energize coil 7 so that it will move armature 7 to its upper position, if it is in its lower position.

In the arrangement shown in Fig. 2',-only one semaphore 11 is employed having three positions; 11 designates the motor for movdug the semaphore to its different positions;

11 designates the hold clear device for holding it in each of its moved positions;

11, 11, 11 and 11 designate metallic arms adapted to contact at times with metallic strips 11", 11, 11, 11 11, 11 11 con-.

' tacts with 11 from zero or danger position almost tothe 45 or caution position; 11 contacts with 11 fromze'ro or danger position almost to the 45 or caution position and with 11 from just below the 45 position almost to the full clear or 90 position; 11 contacts with 11" at and for a few degrees on each side of the full clear or 90 position and with 11 at and for a few de{ grees each side of the 45 position; 11 contacts with 11" from the 90 position almost but not quite to the 45 position.

The only additional elements of construe tion shown in Fig. 3, not operably connected in Fig. 1, are the relay armature 2* acarmature 8' is normally held in its upper position.

If a train moving in the direction of the arrow a in Fig. 1, comes upon section 1, itwill shunt the relay ,1, thereby dropping the armature 1 so that it makes connection with its back contact, thereby establishing the following circuit: positive terminal of battery 10, wires 26 and 27, armature 8', wires 28 and 29, metallic strip 6, arm 6f, wire 30, motor 6, wires 31, 32 and 33, relay armature 1 wires 34 and 24 to the negative terminal of battery 10. The current flowing in such path will cause the motor to operate to move the semaphore to the 45. or clear position, causing the arm 6 to move over metallic strip 6 until the semaphore almost reaches the 45 position when arm 6, will break contact with strip 6 thus stopping the motor, but'at the 45 position of the semaphore the arm 6 will make contact with metallic strip 6 so that the current v which formerly flowed through the motor will now flow through the hold clear device from the wire 28-by the following path: wire 28, wire 35, strip 6, arm 6 wire 36, holding coil 6 wire 37 to wire 33 and so by the before traced path to the negative terminal of the battery. The current flowing in such lasttraced path will cause the semaphore to be held in its 45 or clear position. As soon however as the train which entered section 1,.enters section 2, the relay coil 2? will be shunted. the armature 2 Will 116 break contact with wire 20 and therefore the current through relay coil 8 will cease causing armature 8 to fall stopping the flow of current through the" holding coil, which consequently permits the semaphore 6 to fall to the zero or danger position to protect the train. Thesemaphore 6' will remain at danger and cannot be moved to the 45 position so long as a train is on section I 2 or 3 for under such conditions the energiz- 12o ing circuit for relay coil 8 is brokeneither by the dropping or armature 2 or armature 3 depending on whether a train is on section 2 or 3. As soon, however, as the train which passed signal 6 passes the end. of tragk-section 3, the relay 8 will again become. energized, relay-armature 8 will .be

lifted and the system would then bein condition to be again operated as before.

When a train enters section 2 traveling lso relay coil 1 and cause armature 1 to drop,

in the direction of the arrow (2 the semaphore 6 is, at that instant, in the 45 or and 38, arm 6 strip 6 wire 39, armature 2-", wires 40 and 41, relay coil 7, wires 42, 23 and 24 to the negative terminal of battery 10. The current flowing in the abovementioned circuit sufficiently energizes coil 7 so that it lifts armature 7', thereby rendering efi'ective another circuit as follows: positive terminal of battery 10, wires 26 and27, armature 8, wire 43, resistance 9, wire 41, relay coil 7 wires 42, 23 and 24: to the negative terminal of the battery. The current flowing in this last traced circuit it will be observed does not depend uponthe position ofsemaphore 6 for its continuity, but due.

to the resistance 9 the current flowing. is

only suflicient to holdthe armature 7' in its upper position, but is not suflicient to raise the armature if it is down, it being necessary to have a circuit made through'arm 6 and strip 6? to cause suiiicient current to flow through relay coil 7 to raise'armature -7', so that after 7' has once been raised by the entrance of a train upon section 2 traveling in the direction of the arrow (1, it will remain in its upper position during the time the said train is on either section 2 or 3, but will fall to its lower position as soon as the train leaves section3, as the relay coil 8 will then lift armature 8 and break the circuit through coil 7. I

If a second trainvshould approach travcling in the" direction of the arrow a'before the first train had left sections 2 or 3 so that armature 7' was still in its upper position, upon entering section 1, it would shunt thus closing the following circuit: positive terminal of battery 10, wires 26, 44 and t5, armature 7', wire a6, strip 5, arm, 5 wire 47, motor 5, ' Wires 48, 49, 50, 32 and 33, armature 1 wires 34 and 24 to the negative terminal of battery 10. The current in said circuit would operate the motor 5 to move the semaphore 5 to the 45 position at which point arin 5 would break contact with strip 5, thus cutting off the current from the motor, but at the same time the current which was flowing through the motor would be directed through the hold clear device 5 flowing from wire 46 to wire 51, strip 5,

arm 5 wire 52, holding coil 5 wire 53 to.

wire 50 and to the negative terminal of the battery as before, thus holding the semaphore in its 45 position. It is to be observed that the said second train would not be able to clear semaphore 6 if a train were in either section 2 or 3 for the very presence .gize it sufiicieritly to lift armature 7 of a train on eitherof said sections deenergizes relay 8, thus causing armature 8 to be in its lower position, thus breaking the operating circuit for semaphore 6.

When the second train passes semaphore 5, it goes to the zero or danger position due to the fact that armature 1 is drawn to its upper position, but all'other' parts of the system remain as before so that a third train approaching in the direction of arrow (1 would be able to operate semaphore 5 to its 45 position and so enter section 2. It will be thus seen that sections 2 and 3 could be filled with trains all going in one direction without danger of collision, and a train approaching section 2 in the direction otarrow a could not operate semaphore 6 until the last train hadv left section 3, for just so long as there is a train on 2 section 2 or 3 relay armature .8 would be down, thus preventing the operation of semaphore 6. It is also to be observed that as soon as the last train left section 3, the

ing closed by the entrance of a train on section '1. I

Ifa-train should enter section 3 traveling in the direction of arrow 6, it would prevent all operation of the signals 5 and 6 by the subsequent entrance of a train on section 1 moving in the direction of arrow a, for the'first said train would shunt relay 3 thus causing armature 3 to dropand break the energizing circuit of relay 8, which would cause armature S to fall and pre-' vent the clearing of semaphore 6 when the said subsequent train entered section 1. The dropping of relay armature 8 would not however cause relay ,7 to be energized by the circuit jheretofore described for resistance 9jwouldnot fallow suflicient current'toflow through relay coil 7 to enerconsequently the "operating circuit of semaphore 5 =would be broken; which condition would exist"as long-"as the first said train remainedon section 2 bit 3. v Those-skilled in thefart oflra-ilway signaling and especially single track auto-' matic block signaling can readily understand that the system above described accompiishes a result not before attained but long sought, for by itsuse all of the advantages of a signal system employing track circuits are preserved, the advantages of an automaticsystem are preserved and at the same time the added result of being 'ahleto govern semaphores 5 and 6 in accordance with the presence and direction of 7 was made through arm 11 and strip 11 movement of a train on. a track circuit section is attained.

The modification oft-he device as shown in Fig. 2 is governed by the track: circuits and relay coils 7 and S exactly as in the device as shown in Fig. 1, but"instead of having two semaphores .the 3'indications are given by three positions of one semaphore, the full clear or 90 position of the semaphore being obtained when a train is on clearing section 1 and no train on sections 2 and 3, under which conditions -armature 8"wonld be in its upper position so-that a circuit would be formed as fol lows: positive terminal of battery 10, wires 26 and 27, armature 8, wires 28, 54 and 55, strip 11", arm 11 wires 56 and 57, motor 11, wires 58 and 33, armature 1 wires 34 and 24 to the negative terminal of battery 10. The current in the above traced circuit operates the motor and moves the semaphore to the 45 position, at which time arm 11 breaks contact with strip 11 so that current through the above traced path is cut ofl? from the motor, but at the same time arm 11* makes contact with strip 11 so that a circuit is made from wire 54, through strip 11 and arm 11 to wire 57 and the wire 58, the current in which circuit causes the-motor to further operate to move the semaphore to the full clear or 90- position, at which time 11 breaks contact with strip 11 cutting ofl? current from the motor, but at the same time arm 11 makes contact with strip 11 so that a circuit is made from wire 28 through wire 59, strip 11 arm 11, wire 60, holding coil 11 and wire 61 to wire 33, and the current flowing in said circuit holds the signal in the full clear or 90 position. in which position it remains until the train enters on section 2 at which time the semaphore returns to the danger or zero degree position because the holding circuit is *broken by the shunting of relay 2 the deenergization of relay 8 and the consequent dropping of relay armature 8'.

When semaphore 11. was in the full clear positiomthe pick-up circuit for armature just as it was made as shown intFig. 1 and after such circuit-was made the holding circuit through relay 7 acted to hold the armature 7' in its upper position.

If a train traveling in the direction of arrow a enters section 1 before a preceding train has cleared sections 2 01-3, the shunting of relay coil 1 and the consequent drop- I ping of armature 1 would complete the fol lowing circuit: positive terminal of battery '10, wires 26, 44 and 45, armature 7,'w1res 62 and 63, strip 119, arm 11, wire 57 motor 11'. wires 58 and 33, armature 1 wires 34 and 24 to the negative terminal of battery 11 to the full clear position.

10, and the current flowing in'said circuit would operate motor 11" to move the semaphore to the 45 position, at which point arm-11* would break contact with strip 11 semaphore 11, would move semaphore 11 to the 45 position until all trains had left sections 2 and 3, afterwhich the next train approaching signal 11 traveling in the di-v rection of arrow a would move semaphore A train entering section 3 traveling in the direction of arrow 1) would not pick up armature 7'-for the pick up circuit would be broken at arm 11 therefore a subsequent train entering section 1 traveling in the direction of arrow a could not move semaphore 11 to either of its operated positions. 1

It is to be observed that whereas the aspects under different conditions of semaphore 11 are different from those of semaphores 5 and 6, that the indications given by one semaphore 11 are exactly the same as given by two semaphores 5 and 6. a In Fig. 3 is shown a modification of Fig. 1, wherein semaphore 5 is caused to have difl'erent aspects according to whether a train whichhas passed semaphore 5 going in the direction ofarrow a is in section 2 or section 3. This is accomplished by giving to semaphore 5 one more position than it had in the form illustrated by Fig. 1. so

5 could be moved tothe 45 position, but when the train is on section 3 it could be moved to the 90 position.

Atrain approaching semaphores 5 and 6 from the direction of the arrow a will first enter upon section 1, and as in the form shown by Fig. 1, if no train is on section 2 or 3 semaphore'fi will be moved to the 45 osition, allowing the train to proceed at full speed past the signal and, as was the case in the form shown by Fig. 1, if a train was on either section 2 or 3 and had entered' upon section 2 or 3 from the direction of the arrow 5, the train approaching from the direction of the arrowra would receive no proceed signal at all. If. however, a train approached in the direction of arrow a while a preceding train was on section 2, the semaphore arm 6, as was the case in Fig. 1, would not be moved but the semaphore arm'5, as was the case in the form shown in Fig. 1, would move to the 45 position. In the form shown by Fig. 3,

that when a train is on section 2, semaphore ment when relay armature 7 is in its upper position due to the passing of a train in the direction of arrow (1 beyond the semaphores 5 and 6,being asfollows: positive side of battery 10, wires 26, 44, 45, armature 7, wires 46, 71, armature 2, wires 74 and 75, metallic strip 5*, arm 5, wire l7, motor 5', wires 48, 49, 50, 32, 33, armature 1 Wires 34 and 24 to the negative terminal of the battery 10. The current flowing in the above traced path would cause the motor to operate and move the semaphore 5 to its 90 position, it, of course, being moved previously by the same circuit as described in Fig. 1, to the position and after it has been-moved by current in this last traced path to the 90 position, the current would then pass by Wire 76 to metallic strip 5, arm 5 and wire 52 to the hold clear coil 5 and thence to the negative terminal of the battery by wire 53 as in the case when the motor was being operated.

It will thus be understood that in the form of the invention illustrated by Fig. 3, a train approaching semaphores 5 and 6 in the direction of the arrow a will be given a distinctive aspect to the presence of a train on either sections 2 or 3.

Although applicants have selected the well-known normal danger system of operating signals in connection with the embodiment of their invention which they have selected to illustrate the principle of their invention, it is to be distinctly understood that it is immaterial whether the so-called normal danger system of signaling is employed in connection with this invention or whether the so-called normal clear system is employed for, to transpose from the normal danger system to the normal clear sys tem would simply mean the absence of the preliminary clearing section 1, shown in each of the figures, and in place thereof the substitution of the conductor shown by ,dotted line 77 in each of the figures. It is furthermore to be observedthat the aspects of the signals would either with the nor- 1 mal danger or the normal clear systems be identical and that under the same conditions as regards the presence of a train.

which has passed the semaphores 5 and (3, the aspects of the signal displayed to an approaching train would in the two systems be identical.

In practice all of the systems shown would be duplicated for single track, the opposing semaphore corresponding to semaphores 5 and 6 and 11 being in the well-known manner interlocked electrically, that is, 5 and 6 and 11 at one end of the block with 5 and 6 and 11 at the other end, and all would be controlled by the same track circuit sections, so that a train approaching a semaphore in either direction would, if semaphore 6 or 11 moved to the clear position, enter the block controlled thereby at full speed. If the arm 5 moved to the 45 position, or in case 11 was used it moved to the 45 position, the train would enter the block under control. If neither semaphore assumed the 45 position, the approaching train would not enter the block.

Althou h we have herein shown and described t e relay 7 as governing a semaphore 5 or a position of a semaphore 11, it is to be understood that such are only single instances of an exhibition of its functions. In its broadest aspect the principle of relay 7 may be employed in controlling one or more aspects of any semaphore, located at any point, having a plurality of aspects, when such semaphore should have some one or more of its aspects controlled by the presence and direction of movement of a train on the track circuit sections controlling relay 7, and it isimmaterial whether or not such semaphore is also jointly controlled in its aspects by other means, and therefore we desire it to be understood that such applications being well within the skill of those learned in the art of railway signaling would embody the principle of the idea of means herein set forth.

It will be understood, of course. in practising our invention, the detailswill be moditied to meet individual cases. The signals may be of any suitable type and the indications caused to occur in any well known manner and in locations according to conditions.

Having particularly described the construction and operation of physical embodiments of our invention and explained the operation and principle thereof, what we claim as new and desire to protect by Letters Patent is:

1. In a railway signal system; a signal having a biased aspect and a plurality of operated aspects; a closed track circuit; a relay controlled by said closed track circuit;

a normally closed circuit containing a secrelay and includin a limiting resistance adapted to be clos when the track circuit is shunted and adapted to maintain the armature of said third relay in the raised position after it has been moved thereto-by the closing of the first mentioned normally open circuit after said circuit controller is opened; a normally open circuit including said signal controlled bythe armature of said third relay; and means to furnish electrical energy to each of said circuits.

2. In a railway signal system; a block; a

signal governing the entrance to one end of said block and adapted to have a normal bias aspect and a plurality of operated as pects; a closed circuited track circuit of which the rails of said block form a part; a source of ener in said circuit anda translating mechanism in said circuit; means controlled by the'translating mechanism adapted for causing an operated aspect of said signal; a second translating mechanism, including a normally lowered armature means controlled by the first-mentioned translating mechanism and the aspect of the signal.

adapted for energizing the second mentioned translating mechanism sufiiciently for raising its normally lowered armature; means I controlled by the first-mentioned translating device operative to retain the said armature in its raised position after being raised thereto while said first-mentioned translating mechanism is deenergized; means gov erned by the armature of said second translating mechanism adapted to cause another operated aspect of said signal,

3. In a railway signal system; a signal having a biased aspect and an operated aspect; a closed track circuit; a translating device controlled by the closed track'c'ir cuit; a normally closed circuit containing a second translating device controlled by the first-mentioned translating device; a circuit for controlling the operated aspect of the signal controlled by the second-mentioned translating device; a normally open circuit controlled by the first-mentioned translating device including a third translating device and a circuit controller adapted to be closed in the operated aspect of the signal; the third-mentioned translating device including a normally lowered armature; the third-mentioned translating device adapted to be sufiiciently energized by the shunting of the track circuit when the circuit controller is closed for raising the normally lowered armature; a second normally open circuit controlled by the secondmentioned translating'ldevice and including the third-mentioned translating device and a limiting resistance adapted to be closed when the track circuit is shunted and adapted to maintain the armature of said third-mentioned translating device in the raised position after being moved thereto by the closing of the, first-mentioned normally open circuit after said'first-mentioned circuit controller is opened; a normally open circuit for signaling controlled by the armature of said third -mentioned translating device; and means to furnish electrical energy to each of said circuits.

- 4. In a railway signal system; a signal having a biased aspect and an operated aspect; a closed track circuit; another closed track circuit; a translating device controlled by the first-mentioned track circuit; a translating device controlled by the second-mentioned track circuit;a' normally open cir-j cuit controlled by both of the translating devices, said normally open circuit adapted to govern the signal; a second normally open circuit controlled by the second-mentioned translating device including a third translating device and a circuit controller controlled by the aspect of the signal; said third -mentioned translating device including a normally lowered armature; said third-mentioned translating device adapted to be sufliciently energized by the shunting of the second-mentioned translating device when the circuitcontroller is closed to raise the normally lowered armature; a third normally open circuit including the third-mentioned translating device and a limiting re sistance adapted to be closed when the second-mentioned translating device is shunted and adapted to maintain the third-mentioned translating device sufliciently energized to retain its armature in its raised position after being raised thereto after the said circuit controller is opened; a fourth normally open circuit for signaling controlledby the armature of the third-mentioned. translating device and the first-mentioned translating device; and means to furnish electrical energy to each of said circuits.-

5. In a railway signal system; a closed track circuit; a second closed track circuit; a s1gnal circuit; means controlled by the said track circuits for governing said signal circuit; a normally open energizing circuit including a relay; means for closing said normally open energizing circuit controlled by the signal clrcuit and by a track circuit; a normall open holding circuit includ ng the said relay; said normally open holding circuit controlled by said firstnamed means; and means co trolled by said relay for signaling.

6. In a railway signal system: a signal &' translating device; a second translating device; a third translating device; a circuit for said signal governedby the first two ment oned translating devices; an energizmg clrcuit for said third a holding circuit for said third translating device; means controlled by the first two mentioned translating devices to complete translating device the energizing circuit and the holding circuit for the third-mentioned translating device; means controlled by the third-mentioned translating device for governing the terminals, each of said terminals connected to one of the track rails of the section at a distance from the connections of the source of electricity, a second section of the track rails separated by insulating joints from the rest of the trackway, a source of electricity having two terminals, each of said terminals connected to one of the track rails of the second section, another translating device having two terminals, each'ofsaid terminals connected to one of the track rails of the second section at a distance from the connections of the source of electricity, a normally closed circuit, means controlled by the said normally closed circuit for signaling, means controlled by said' translating devices for governing said normally closed circuit, a normally open circuit, means for closing said normally open circuit controlled by said normally closed circuit, means to maintain closed said normally open circuit controlled by the normally closed circuit, and means controlled by the said normally open circuit for signaling.

8.-In a railway signaling system, a closed track circuit, a second closed track circuit, each of said circuits including .a translating device, a normally closed circuit governQd by the translating devices, means controlled by the said normally closed circuit for signaling, a normally open circuit, means for closing said normally open circuit controlled by said normally closed circuit, and the translating device of the first-mentioned track circuit, means to maintain closed said normally open circuit controlled by the normally closed circuit, and means controlled by the said normally open circuit for signalin a g In a railway signal system, a signal including moving and holding means, and adapted for a plurality of aspects, a block including closed circuited track circuit sections, the entrance to which in'one direction is governed by said signal, means governed by said track circuit sections including a normally energized controlling device adapted for causing one of said aspects, a circuit controller governed by said one aspect of the signal, means controlled by said circuit controller adapted to be energized by the entrance of a train in one direction only upon said block, a circuit controller controlled thereby adapted to determine another aspect of said signal.

10. In a railway signaling system, a closedtrack circuit, a second closed track circuit, a normally closed circuit, means controlled by the said normally closed circuit for signaling, means controlled 'by said track circuits for governing said normally closed circuit, a normally open circuit, means for closing said normally open circuit controlled by said normally closed circuit, means to maintain closed said normally open circuit, and means controlled by the said normally open circuit for signaling.

11. In a railway signaling system, a trackway composed of two lines of electrically conductive rails, a section of the track rails separated by insulating joints from the rest of the track way, a source of electricity having two terminals, each of said terminals connected to one of the track rails of the section, a translating device having two terminals, each of said terminals connected to one of the track rails of the section at a distance from the connections of the course of electricity, a second section of the track rails separated by insulating joints from the rest of the trackway, a source of electricity having two terminals, each of said terminals connected to one of the track rails of the second section, another translating device having two terminals, each of said terminals connected to one of the track rails of the second section at a distance from the connections of the source of electricity, a normally open circuit, means to complete said normally open circuit controlled by both the translating devices, means controlled by said normally open circuit for signaling, a second normally open circuit, means for completing said second-mentioned normally open circuit controlled by said second-mentioned translating device and said first-mentioned normally open circuit, a third-normally open circuit controlled by said firstmentioned translating device and the second-mentioned normally open circuit, means rendered operative by said second-mentioned normally open circuit to maintain said thirdmentioned normally open circuit partially closed, and means controlled by the thirdmentioned normally open circuit for signal. ing. I

12. In a railway signaling system, a closed track circuit, a second closed track circuit,

a normally open circuit, means to complete said normally open circuit'controlled by both the track circuits, means controlled by said normally open circuit for signaling a second normally open circuit. means for completing said second-mentioned normally open circuit controlled by said second-mentioned track circuit and said first-mentioned normally open circuit. a third normally open circuit controlled by said first-mentioned track circuit and the second-mentioned normally open circuit, means rendered operative by said second-mentioned normally open circuit to maintain said third-mentioned normally open circuit partially closed, and means controlled by the third-mentioned normally open circuit. for signaling.

13. In arailway signaling system, a semaphore controlling mechanism, a closed track circuit, a relay controlled by said closed track circuit, a normally closed circuit containing a second relay controlled by the first relay, a circuit including said semaphore controlling mechanism controlled by said second relay, a normally open circuit controlled by said first relay including a third relay and a circuit breaker adapted to be closed by the semaphore controlling mechanism, said third relay adapted to be energized by the shunting of the track circuit when said circuit breaker is closed, a second normally open circuit including said third relay adapted to be closed when the track circuit is shunted and adapted to maintain said third relay energized after said circuit breaker is opened While said track circuit is shunted, and a third normally open circuit controlled by said third relay, a semaphore controlling mechanism controlled by the said last-named normally open circuit, and means to furnish electrical energy to each of said circuits.

14. In a railway signaling system, a block, a signal governing the entrance to one end of said block and adapted to have a biased aspect and a plurality of operated aspects, a closed circuited track circuit of which the rails of said block 'form a part, a source of energy in said circuit and a translating mechanism in said circuit, means controlled by the translating mechanism adapted for governing an operated aspect of said signal, another translating mechanism, means controlled by the first-named translating mechanism and the aspect of the signal adapted for energizing said other translating mechanism, and means governed by said last-named translating mechanism adapted to govern another operated aspect of said signal, means rendered operative by the energization of said last-named translating mechanism to control said last-named,

rails of said block form a part, a source of energy in said circuit and a translating mechanism in said circuit, means controlled -by the translating mechanism adapted for governing the semaphore controlling mechanism, another translating mechanism, means controlled by the first-named translating mechanism and the semaphore controlling mechanism adapted for energizing said other translating mechanism, a semaphore controlling mechanism, means governed by said last-mentioned translating device to govern said last-named semaphore controlling mechanism, and means rendered operative by the energizationv of said lastmentioned translating device to control said last-named means.

16. A normally energized translating device, another normally energized translating device, a normally closed circuit including a source of electricity, means controlled by the translating devices to break the normally closed circuit, means governed by the normally closed circuit for signaling, a normally open circuit, a circuit controller controlled by the normally closed circuit, means controlled by the first-mentioned translating device and said circuit controller to complete said normally open circuit, means governed by the translating devices, to maintain said normally open circuit closed, and means governed by the normally open circuit for signaling.

17. A normally energized translating device, another normally energized translating device, a normally closed circuit, means controlled by the translating devices to break the normally closed circuit, means controlled by the normally closed circuit for signaling, a normally open circuit, means controlled jointly by the normally closed circuit and the first-mentioned translating device to close said normally open circuit, means governed similarly and solely by either of said translating devices to maintain said I normally open circuit closed, and means controlled by the normally open circuit for signaling.

18. A normally energized translating device, another normally energized translating device, a normally closed circuit, means controlled by the translating devices to break the normally closed. circuit, means controlled by the normally closed circuit for signaling, a normally open circuit, means controlled jointly by the normally closed circuit and the first-mentioned translating.

device to close said normally open circuit, means governed by each of said translating devices separately and independently to re tain said normally open' circuit closed, and means controlled by the normally open circuit for signaling.

, 19. In a railway signaling system, a closed track circuit, a second closed track circuit, a normally closed circuit, means for breaking said normally closed circuit controlledby both of said track circuits, means for signaling controlled by said normally closed circuit, a normally open circuit, means for completing said normally open circuit controlled by said first-mentioned track circuit and said normally closed circuit, asecond not allow suflicient current to flow in the second normallyiopen circuit to close said first-mentioned normally open circuit, but will allow suflicient current to flow through the second-mentioned normally open circuit to maintain the first-mentioned normally open circuit closed after being closed, and means for signaling controlled by said firstmentioned normally open circuit.

20. In a. railway signaling system a semaphore having an operated position and a biased position, means for causing said semaphore to move from a biased position and be held in an operated position, a normally open circuit including a source of energy for controlling said means, a normally closed circuit, means including trackcircuits for governing said normally closed circuit, means for signaling controlled by said normally closed circuit, and means for closing said normally'open circuit controlled by said normally closed circuit and one of the track circuits.

21. In a railway signaling system, a semaphorehaving an'operated position and a biased position, a motor for causing said semaphore to move from the biased position to the operated position, a normally open circuit including said motor and a source of energy, a normally closed. circuit, means including track circuits for governing said normally closed circuit, means for signaling controlled by said'normally closed circuit, means for closing said normally open circuit controlled by said normally closed circuit, and means to maintain closed said normally open circuit controlled by said track circuits. v

22. In a railway signaling system: a plurality of translating devices, a circuit including means for controlling its own continuity, the said means for controlling the continuity of the circuit being controlled by the translating devices, a normally open circuit including another translating device and including means for completing its own continuity, said last-mentioned means being controlled by the first-mentioned circuit and by one of the translating devices, means controlling the other translating device to maintain the last-mentioned translating device energized after being energized, said means being controlled by a translatmg device, means controlled by the first-mentioned circuits and by the normally open circuit for signaling, and a source of current for each of said circuits.

23. In a railway signaling system 111 combination, a semaphore, a second semaphore, a normally closed circuit for governing the first semaphore, a normally open circuit for governing the second semaphore, a trackway over which both said semaphores govern movements in the same direction, means dividing said trackway into a series of track circuit sections, means including a track circuit section for governing said first-mentioned circuit, and means governed by the operation of the track circu1t sections in one sequence only including a circuit controller governed by the normally closed circuit for closing the first normally open circuit.

24. In a railway signaling system, in com bination: a circuit controller having an open and a closed position and remainin temporarily in its then positionafter a c ange in its governing circuit, a governing circuit for said circuit controller, a circuit including said circuit controller, means having cooperating contacts in series with said circuit controller for closing said last-mentioned circuit only before said circuit controller moves from its temporary position after a change in its governing circuit; and means for signaling controlled jointly by said last-mentioned circuit and said governing circuit.

25. In a railway signaling system, in combination: a circuit controller, a governing circuit for said circuit controller, said circuit controller having an open and a closed position and being in closed position only when said governing circuit is closed and remaining in closed position temporarily after said governing circuit is opened, another circuit including said circuit controller, means having cooperating contacts in series with said circuit controller for closing said lastmentioned circuit, a normally open circuit, means for controlling said normally open circuit governed jointly by said another circuit and said governing circuit only before said circuit controller moves from its temporary closed position after the opening of its governing circuit, and means for signaling controlled by said normally open circuit.

26. In a railway signaling system, in combination: a signal having an operated position and a biased position, a governing circuit for said signal, a circuit controller controlled by said signal and'having an open and a closed position. said circuit controller temporarily remaining in its then position after a change in said governing circuit, another circuir including said circuit controller, circuit controlling means included in said another circuit in series with said circuit controller for closing said another circuit. a signaling circuit, means for controlling the signal circuit controlled jointly by said another circuit and the governin circuit for said signal only before sald circuit for si controller moves from its temporary position after a change in the governing circuit of said signal, and means for signaling controlled by said signaling circuit.

27. In a railway signaling system, in combination: a. signal having an operatedposition and a biased position, a governing circuit for said signal, a circuit controller.con

' trolled by said signal and being in closed po sition when said signal is in operated position, said circuit controller temporarily 'remaining in closed position after the opening of said'governing circuit, another circuit including said circuit controller, means for closing said last-mentioned circuit when said circuit controller is in its closed position, and means for signaling controlled jointly by said another circuit and said governing circuit before the said circuit controller moves from its temporary position after the opening of said governing circuit.

28. In a railway signaling system, in combination: a track circuited trackway, a circuitcontroller controlled by a track circuit of the trackway and remaining momentarily in closed position after the shunting of said track circuit, a circuit having therein only two points of possible break, one point being controlled by said circuit controller,.means for closing said circuit at the other point, and means for signaling controlled jointly by said circuit and a track circuit of said trackway after the same has been shunted and during the time the circuit controller is momentarily in closed position.

29. In a railway signaling system, in com bination: a track circuited trackway, a circuit controller controlled by a track circuit of the trackway and remaining momentarily in closed, position afterthe shunting of said track circuit, a circuit including said circuit controller, circuit controlling means included in said circuit in series with said first circuit controller, and means for signaling controlled jointly by said circuit and said track circuit after the same has been shunted and during the time the circuit controller is momentarily in closed position.

30. In a railway signaling system, in combination: a track circuited trackway, a circuit controller having an open and a closed position and controlled by a plurality of track circuits of the trackway and momeni tarily in closed position after the shunting of one of said track circuits, a circuit ineluding said circuit controller, means having cooperating contacts in series with said circuit controller for closing said circuit, means controlled jointly by said circuit and the said one track circuit after it is shunted and during the time the circuit controller is momentarily in closed position, and means aling controlled by said means.

31. n a railway signaling system, in combinationpa track circuited trackway, a normally open circuit, a circuit controller hav-, ing an open and a closed'position controlled by a plurality of track circuits of the trackway and momentarily in closed position after the shunting of one of said track circuits, means controlled jointly by the circuit controller and the said one track circuit temporary position after the said one track circuit is shunted for closing said normally open circuit, and means controlled by'said normally open circuit for signaling.

32. In a railway signaling system, in conibination: a normally closed signaling-circuit, a circuit controller governed by said signaling circuit, a track circuited track- Way, means controlled by said track circuited trackway for governing said norgizing circuit closed after the first-men tioned normally closed circuit is opened until the said maintaining circuit is closed, means controlled by said track circuited trackway for closing said maintaining circuit while the normally closed signaling circuit is open, and means for signaling controlled by s'aid relay. 3

33. In a railway signaling system, in combination: a signal having a stop indication position and a proceed indication position; a track circuited trackway, a normally closed signaling circuit controlled by a portion of said track circuited trackway for governing said signal indication positions, a relay included in two normally open-circuits, one of said circuits being an energizing circuit and the other being a maintainsaid signal and closed when said portion of the track'circuited trackway is not shunted and the signal is in proceed. indication position and remaining closed after said portion of the track circuited trackway is shunted for a sufficient length of time for said maintaining circuit to be closed, meansfor closing said energizing circuit including said circuit controller, means controlled by said portion of the track circuited trackway for closing said maintaining circuit, and means for signaling controlled by said relay.

34. In a railway signaling system, in combination: a signal having an operated position and a biased position, a track 'circuited trackway, translating devices controlled thereby, means controlled by he translating devices for governing said g nal, a relay included in a normally open circuit, means for completing said normally open circuit and preliminarily energizing before thecircuit controller moves from its biased. position, and means governed by said relay for signaling.

35. In a railway signaling system, in combination: a signal having a stop indication position and a proceed indication position, a track circuited trackway, means controlled by a portion of said track circuited trackway protected by said signal for governing said signal indication positions, a circuit controller governed by said signal and closed only when the signal is in proceed indication position, a relay, means dependent on the circuit controller being in its closed position and upon a track circuit of said trackway being shunted for preliminarily energizing said relay; means for keeping said relay energized after it has been preliminarily energized While said portion of the track circuited trackway is shunted, and means for signaling controlled by said rela d6; In a railway signaling system, in combination: a track circuited trackway including track relays, a relay included in a normally open energizing circuit and a normally open holding circuit, a circuit controller controlled by a track circuit of the trackway and open when-the track relay connected to said track circuit is shunted, said circuit controller remaining momentarily in closed position after the deenerg'ization of the track relay connected to 'said trackcircuit, means for closing said nor-' 'nal controlled by said local circuit, and

means for continuing the indication of said ermissive signal when once caused until oth track sections are unoccupied.

38. Two track circuits, a-circuit controller governed thereby, a signal, a controlling circuit for said signal, means for governing said last named circuit, said means being controlled jointlyby one of said track circuits and said circuit controller before the circuit controller is moved to a determined degree from its then position by the operation of the track circuit.

39. A track circuit, a circuit controller governed thereby, a signal controlling circuit, means for governing said last-named circuit, a circuit for governing said means which is controlled jointly by the track circuit and the circuit controller before the circuit controller is moved to a determined degree from its then position by the operation of the track circuit, a' second track circuit, and means governed thereby for governing the circuit controller.

40. A track circuited trackway, a circuit controller governed by a track circuit of said trackway, a signal, a circuit governing said signal, means for temporarlly maintaining said last-named circuit between. the operation of said track circuit and the movement of said controller to a determined position, a holding circuit adapted to maintain said signal, and means for establishing said for maintaining the same during a predetel-mined condition of the trackway.

etl. A track circuited trackway, a circuit controller governed by two or more track circuits of said trackway, a signal, a circuit governing said signal, means for temporarily maintaining said last-named circuit between the operation of one of said track circuits and the movement of said controller to a determined position, a holding circuit and means for establishing said holding circuit upon the operation of said track circuit and during the temporary maintenance of said signal governing circuit and for maintaining the same during a predeter mined condition of the trackway.

42. A track circuited trackway, a signal governing trafiic in one direction and controlled by one or more track circuits of said trackway, another signal controlling traflic in the same direction, a normally open circuit adapted to control said another signal governing traffic in the same direction,

means for temporarily maintaining said circuit durin a predetermined position of said first slgnal when one of the track circuits governing said signal is occupied, and means for continuing said circuit during the occupancy by a train of one or more determined track sections.

.43. A track circuited trackway, a signal controlled by a track circuit of said trackway, a circuit controllingasignal indication, means for rendering the same operatiy e only durin the time between the operation of said rst-named' track circuit and the movement of the signal to a determined position, and means controlled by another track circuit for rendering said circuit inoperative at all times' 44. A track circuited trackway, a signal controlled by a track circuit of said trackl or of said trackway and controlling a signal indication, means for renderin the same operative only during the time Eetween the operation of the track circuit controlling said circuit and themovement of the signal to a determined position, means controlled by another track circuit for rendering said circuit inoperative at all times, and means for continuing the operation of the signaling circuit when once established during the occupancy of a predetermined section of said track circuited trackway.

45. In a signaling system for railways, in combination: a circuit controller having an open and a closed position and remaining temporarily in its closed position after a change in its governing circuit, a governing circuit for said circuit controller, a circuit including said circuit controller, means for closing said circuit while said circuit controller is in its closed position, and means for signaling initially controlled by said last-mentioned circuit, said means after its response to a change 'in said last-mentioned circuit. being also controlled by said governing circuit.

46. In a railway signaling system, in combination; a normally closed circuit controller, a governing circuit for said circuit controller, said circuit controller remaining closed temporarily after a change in its governing circuit, a normally open cir- 1 cuit including said circuit controller, and means for signaling initially controlled jointly by said last-mentioned circuit and said governing circuit and controlled solely by said governing circuit after responding to said joint control.

' 47. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a signal governing traflic in one direction over said stretch and having a biased stop position and an operated'proceed position, a governing circuit for said signal, a device adapted to be governed electrically, circuits for rendering said device effective, one of said circuits being closed-temporarily while said signal is assuming its biased stop position and while a track circuit section adjacent to said signal is occupied, the other of said circuits being efiective to maintain said device effective only when said device itself is effective at the time this other'circuit is closed, means fqr closing the other of said circuits subsequent to the occupation of said adjacent track circuit section but prior to the interruption of said first circuit, said means also maintaining said second circuit closed so long as said signal remains in its biased position, and another signal controlled by said device. a

48. In a signaling system for railways," in combination: a track circuit section, a

circuit controller governed by said track circuit section and open when that track circuit section is occupied, another circuit controller governed by said track circuit seotionand closed when said track circuit section is occupied, said first circuit controller remaining closed temporarily subsequent to the occupation of said track cir cuit section, a device adapted to be gov erned electrically, a circuit'for rendering said device effective and including said device and said first circuit controller, means for closing said circuitvbefore said first circuit controller is opened by the presence of a train on said track circuit section, another circuit for maintaining said device effective which is controlled by said second circuit controller and which is initially effective only if the device itself is efl'ective at the time this other circuit is closed, and means for signaling governed by said device. I

49. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a signal for governing traflic over said stretch, a circuit controller responsive to the presence of a train on a track circuit section protected by said signal and remaining temporarily closed subsequent to the occupation of said section by a train, a device adapted to be controlled electrically, means for signaling controlled by said device, an

energizing circuit for said device governed jointly by said circuit controller and a track circuit section ad acent to sald signal, and a maintaining circuit for said devlce con trolled by said track circuit section protected by said signal, said maintaining circuit being initially effective only if the device itself is efi'ective at the time said maintaining circuit is closed.

50. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a circuit controller having an open position and a closed position and remaining temporarily closed after a change in its governing circuit, a

. governing circuit for said circuit controller,

a signal, and means for governing said signal, said means being controlled jointly by said circuit controller and a track circuit section of said stretch of trackway, and be ing also controlled by said governing circuit alone after said means has responded to the controlling influence of said circuit controller and said track circuit section.

.51. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a first semaphore and a second semaphore, each having a proceed aspect and a stop aspect, a controlling circuit for the first semaphore, means for governing the second semaphore,

said'means being controlled jointly by said.

controlling circuit for said first semaphore and a track circuit section adjacent to said first semaphore, and being rendered effective when said first semaphoreindicates proceed, and when said adjacent track circuit section is occupied, and means for maintaining ,the first-mentioned means efiective so long as the first semaphore indicates stop, said last-mentioned means being initially effective only when said first-mentioned means is efiective.

52. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a semaphore for governing traflic in one direction over said stretch and having a proceed aspect and a,stop aspect, a circuit controller subjected tothe same controlling influence as said semaphore and closed when said semaphore indicates proceed, another circuit controller governed by a track circuit section adjacent to said semaphore and closed when that track circuit section is oc-.

' said circuit controllers, a second semaphore for governing traflic in the same direction as said first semaphdre, means for governing said second semaphore whlch 1s rendered effective when said circuit is closed, and

means controlled by a track circuited portion of the trackway protected by said first semaphore for maintaining said firstmentioned means eflective so long as this portion of the 'trackway"- is occupied by a train, said last mentioned means being initially efi'ective only when said first-mentioned means is efi'ective.

53. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a semaphore for governing traffic in one direction over said 46 sections protected by said first semaphore are occupied, means for modifying said prestretch, a governing circuit for said semaphore, a second semaphore having a predetermined aspect when the track circuit determined aspect of said second semaphore, said means being controlled jointly by said governing circuit for said first semaphore and a track circuit section adjacent to said first semaphore, and means for maintaining said first-mentioned means effective so long as the first semaphore indicates stop, said last-mentioned means being initially dependent upon said first-mentioned means being concurrentl effective.

54.,In a signaling system or railways,

in combination: a stretch of trackway divided into track circuit sections, a sema-' phore for governing traflic in one direction over said stretch, a governing c1rcu1t for said semaphore, a second semaphore having a predetermined aspect when .the

portion of the trackway protected by said first semaphore is occupied, means for modifying said predetermined aspect of said second semaphore, an energizing circuit for said means controlled jointly by said governing circuit for said first semaphore and a track circuit section adjacent to said first semaphore, and a maintaining circuit for said means controlled by said governing circuit of said first semaphore and initially effective only when said energizing circuit is concurrently established.

55. In a signaling system for railways, in combination: two adjacent track circuit sections, a circuit controller governed by one of said track circuit sections and closed when that section is occupied, another circuit controller governed by the other track circuit section and open When that section is occupied, a device adapted to be governed electrically, a circuit including in se-. riessaid device and both of said circuit controllers, said device being rendered effective when said circuit is closed, means controlled by saidsecond-mentioned track circuit section for maintaining said device in its effective condition, said last-mentioned means being initially effective only when said device is concurrently efi'ective, and means for signaling governed by said device.

56. In a signaling system for railways, in

combination: a stretch of trackway divided has been rendered effective by the closing of said circuit, and means for signaling governed by said device.

57. In a signaling system for railways, in combination: a stretch of trackway divided into track circuit sections, a signal, a circuit conti'oller subjected to the same controlling influence as said signal and closed when said signal indicates proceed, another circuit controller governed by a track circuit section of the trackway, said another circuit controller being closed when said track circuit section is occupied, a device adapted to be governed electrically, a circuit for rendering said device effective when closed and including-in series both-of said circuit controllers, another circuit for maintaining said device efiective which is normally open and'which is ineffective device is effective, means governed {by the track I section. adjacent to and protected. gby saidin combination: two

\ circuit" before-said first circuit is and means. for, signalin g9 g -sa1d device.

signal for: establishing-said las ,Q itione teri- 19 58; In a signaling a signal for governing naling governed by said circuit. L3,:

59. In combination a plurality offdtrack circuit sections each havin a trackrelay; a line circuit controlled by t e track relays of I some of said track circuit 'sections.;-a"s1gnal circuit a normally open circuit controller 5 includedin said slgnal circuit means con- "line circuit prior to occupying sai trolled 'j ointlfby said line circuitand the I track relay of" a particular track circuit .sec-j tion for? closing, said circuit controller when a train" travels in one direction; and occupies! Saidi arti ular-track circuit section prior to! I occupyin another track circuit section-in l advance vt ereof which controls saidline cir-V "cuit; said'meane also preventing the closure "of said circuit controller when 5a train travels in the other direction andelpc cir uit;sections; a. circuit controlled by e o ,s ditrw clie se n a e il" circu1it; 'nor1 nally open circuit controller included in "said signal ,cu'cuit means con fcircuit' said means j also preventing the ,clo-

I circuiti's openedprior to'theioccu army of particular trackcircuit section, said means, after being coiiperatively controlled by said particular track circuit section-and,

troller, continuing the closure of circuit controller so long asjsaid llne circuit ISYOPBH.

61-. In combination! atrack relay; a nortrack circuit-sections, trailic in on "d ces; tion over said track circuit section s cuit'" controller governed, by a-track circuit section adjacent to said *slgnal" and -closedg-y when that track circuit section "is occu' ied, 1 another circuit controller governed-by; oth ofsaid trackcirjcuit sections and open..wlhen either of said track circuit sections is econpied, :a circuit includingin series: both; dig

i. said circuit controllers, and mean open circuit controller included .nal" c rcu t; a. hne .clrcu t." controlled by somerof' said track clrcuit sections; means s for Sig? governed-Qby a particular track circuit y forfsaid line relay irlsaid track circuit sections; an auxiliary recyr-a 60... In comb t1 0n: .a plurality of track the pickup train travels, in one direction. and ;for

movenient" I-a track circuit v section near 65 -wliich,-- an tr the foregoing applet-fie is cited andgwith'fwhichgsaid track relayis opratively associated; a signal circui'tp -including -sa d circuit controller; anotlier track 1 circuitsection and aytrack' relay therefor; 8 line circuit f controlled; by ,at least said last-mentioned track relay; said means,

fi fibfiin' coiiperativel controlledfby said t n ent onedtrack relay and said line reayvto' close said circuit.controllerycontinu- 111g the closure" of said circuitcontroller' solong as said line circuit "isopen.

62,.In comb'natiomai plurality oftrack circuit sections;-,a signal'circuit; a normally section; an electrically o erable device for closing said-circuit' contro ler when changed 5 from its normal condition; said device bc-. ing subjected to the joint" action of said line j circuit and said means and being changed fromis' normal condition; when atrainoccupiessaid particular trackv circuit section prior to occupying another track'circuit section in advance thereof which controls said linecircuit"; said device being maintained the action yofthe line circuit alone in'its b. clianged condition so long as saidline cir- "cult is o en'after such change has been initially e ected. v y

63. In combination:- a plurality of track circuit sections; a line 1relay; a l-ine.cir.cuit

controlled by 'solneqof P. circuit and a holdin i i 1 7 mg the holding circuit effective only when circuit is preliminarily effective; 1.

rnea'ns controlled by" said line relay and a A, d particular track circuit. section for control: trolled. jointly by said line. circuit and a 51 particular track circuit section for: closing said-circnit controller when a trainoccupies said i particular track circuit section: :prior to occupying anothertrack circuit'isection in Q "advance thereof which controls said line '50. Sure, {said-circuit controllerlwhen said line lng said circuits to cause the pickug cir-l cult to beqpreliminarily efi'ective w en a venting, said pickup circuit 'from becoming preliminarily efi'ective when a traintravels Q in the opposite, direction; said'means con- 'tinuing theeifectiveaction of the, holding T clifcult after such actionha's been initiated so long asthelinecircuitiso en, r

n 64.1 In combination! {a p urality of track circuit sections; ailine circin't controlled by some of said'track circuit sections; anauxihary relay; a normally open circuit, controller governed by said auxiliary relay'and I closed 1 when i said auxiliary relay is changed from its normal cond1tion; controlling means'forsaid auxiliary relay; including a quick acting. circuit controller andra slow acting circuit controller acting in coo eration ;Yone-of said. circuit controllers ing controlled. by and line circuit; means for in Said sig- 80' for sai, aux1l1ary relay; means. for renderprei :40 quential. controlling circuits when a train travelsinfone, direction and for, preventing, such closure when a train travels in thejopby said me circuit for maintaining said auxiliary relay has been initiallyfefiected;

also a'ctiug to maintain that changed condition so long as the line circuit is open; and

a circuit for signaling controlled by normally open circuit controller.

65. In, combination; a plurality of track.- circuit sections; a signal circuit a normally".

' deenergized auxiliary relay for. controlling adj acent to which. said auxiliary 'relay an its controlling circuits arelocated; alin'e' said signal circuit; sequential controlling circuitsfor said auxiliary relaygimeans controlled jointly by two of said track circuit sections for establishing one of the controlling circuits upon a'moyement ofthe train in one direction over those track circuit sections; a line circuit controlled by a plurality of said track circuit sections including at least one of said two track circuit sections; a \means controlledby, said li'ne circuit for- {closing a break in the other of the control- 4 as'the line circuit is open; and means for signaling controlled by said signal circuit. 66.111 combination: a plurality of .t'rackfi circuit sections; an auxiliary'relay; two seling circuits for the auxiliary relay so'long J relay; .alinelcir'cuit including said line relay ifitrolledjointly by that particular track cir- ,cuit {section and said line relay .for causing and controlled by-a plurality of said track circuitj sections means also ad acent a particular, track circuit sectiom and consimultaneous effective closure of said se- PQSite direction.

In comb circuit andaholding cii'cultv for said auxi asecond circuit controller included in the pickup circuit and opened when another predetermined track circuit section is occupied;

a third circuit controller included in'the holding circuit and closed when said second- I mentionedpredetermined track circuit sec- I l v trolled bjSfild normally closed circuit and a t back contact of one of said track relays,

tion [isoccupied; said Ecircuit controllers causing temporarily-a substantially simul-f taneousefiective closure of said pickup cir'-" cuit-andfsaidv holding circuit when a train. travels in one direction and preventing such closure when a' train'travels in the opposite relation; track'cu' cuitsor the'stretch in;

direction,

quential controllingcircuits for said auxila. tinuing energization when a train -'iary-relay; a particulartra'ck circuit section r 70. In combination; a plurality of track circuit sections; a line circuit controlled by 7 some of said track circuit sections; an auxiliarf relay; a pickup circuit for said auxilline c rcuit for I ation': a plurality of track r circuit section's; an auxiliary relay; a picku 68. In combination? asplurality of track circuit sections; two circuit controllers governed by said track circuit sections and being opened and closed respectively when said track circuit sections are occupied; one of said circuit controllers being adapted to act quicker than the other; an auxiliary relay; two' sequential controlling-circuits for said auxiliary relay each controlled by one of said two circuit controllers independently .of the other circuit controller.v

69. In combination: a plurality of track circuit sections;;a'line circuit controlled by some of said track circuit sections; an auxiliary. relay; a pickup circuit and a holding circuit for. said auxiliary relay; a circuit controller in the pickup circuit; a second circuit controller in the holding circuit; said said linecircuit and being opened and closed respectively when said line circuit is opened;

a thirdcircuit controller in the pickup circuit controlled by a track circuit section; said plckup circuit and said holding circuit said line circult is open-when a train travels circuit controllers being'both controlled by infone'gdirection and to prevent such conthe opposite direction;

iary relay;1n'eans controlled by a track cirsaid pickup circuit; means including said rinitting the complete closure of'said pickup circuit. when a train travels in one direction and for preventing such complete closure when a train travels in the op osite direction; means controlled auxiliary relay effectively energized after it track; a normally closed circuit; track cirtravels in cuits for the stretch including track relays certain of which control said'normally closed circuit; a signal; a normally open circuit for the. control of said signal; means includ ing an auxiliary relay for closing said normally open circult; a pick-up circuit for said auxiliary relay including acoiitact conand "a' circuit for said auxiliary fi i ination: a stretch ofrailway track; a g a g o ernin' 'trafli'c in one d1 eluding track relays; a normally open. sig-'- In witness whereof, we subscribe our signaling circuit; and means for closing sald natures in the presence of two witnesses.

normally open circuit comprising a. contact l WILMER W. SALMON. operated bysaid signal, and a back contact v FRANK L. DODGSON. .5 of the first track relay opened by a'tr'ain- Witnesses:

passing. through the stretch in the direction GEORGE T. WHITNEY, governed by said signal. SOPHIE LEVIN.

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