US1236705A - Power-actuated system of switch and signal control. - Google Patents

Description

I G.B.GRAY. POWER ACTUATED SYSTEM OF SWITCH AND SIGNAL CONTROL.

APPLICATION FILED JULY 3|. 1914. 1,236,705. Patented Aug. 14, 1917.

. 3'SHEE'TS'SHEET WITNESSES zmg w INVENTOR 5W5. 6

M614, ATTORNEY- G. B. GRAY. POWER ACTUATED SYSTEM OF swncn AND SIGNIAL CONTROL.

APPUCATION LED JULY 31,1914- 1336305. Patented Aug. 14,1917.

3 SHEETS-SHEET 2.

lA/I/EA/TOR 6MB. 6' 39 WW A TTOR/VEK W'TNESSES .G. B. GRAY. POWER ACTUATED SYSTEM OF SWITCH AND SIGNAL CONTROL.

' I 7 APPLICATION man JULY 31. '1914. 1,236,705..

Patented Aug. 14, 1917.

3 SHEETSSHEET 3.

WITNESSES INVENTOI? GARDNER B. 'GRAY, 0F PITTSBURGH, PENNSYLVANIA.

POWER-ACTUATED SYSTEM OF SWITCH AND SIGNAL CONTROL.

negates.

Original application filed April 18, 1914, Serial No. 832,722.

Specification of Letters Patent.

Patented Aug. 14, 1917. Divided and this application filed July 31,

1914. Serial No. 854,242.

To all whom it may concern.

Be it known that I, GARDNER B. GRAY, a citizen of the United States and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Power-Actuated Systems of Switch and Sig nal Control, of which the following is a specification.

The present invention relates to power actuated switch and signal systems used at railroad terminals or the like, the nature of the power used being immaterial, and has for its main object increased safety and certainty of operation. This application is a division of one filed April 18, 1914, Serial No. 832,722, renewed January 11, 1915, Serial No. 1,713, renewed July 29, 1915, Serial No. 42,647, renewed Feb. 12, 1916, Serial No. 78,068.

It is customary in connection with switches to provide a suitable signal or semaphore along the line of way to govern the passage of trains over the switch. The main feature of the invention is to include the signal circuit in the controllers of the switch machine so that as long as power is supplied to the operating means for the switch, whether properly or improperly supplied, the signal circuit is ruptured. And it is only when the switch has been moved to its proper position, locked up, and all power tending to operate the same has ceased to flow that the signal circuit can be completed to give a safe signal for the passage of traflic.

Other features of construction, combination of parts and arrangement of elements will appear as the specification proceeds.

In the accompanying drawings the invention is embodied in a concrete and preferred form but changes may be made within the scope of the appended claims, without departing from the legitimate and intended scope of the invention.

In the said drawings:

Figure 1 is a diagrammatic view of a preferred form of power actuated system of switch and signal control, embodying the invention.

Fig. 2 is a perspective view of the interlocking means which may be used between the lock and switch levers of the tower machine.

Fig. 3 is a. perspective view of the interlocking means which may be used between the lock and signal levers of the tower machine.

Fig. 4 is a detail view of one of the levers in the tower machine.

Fig. 5 is a detail View of its locking member.

Fig. 6 is a detail view of the throw rod and its actuating member.

Fig. 7 is a plan view of the switch and switch machine.

Similar characters of reference indicate corresponding parts in the different views.

1 indicates the switch or switch points. 2 is the lock-rod and 3 the throw-rod, both of said rods being suitably connected to said switch in a well-known manner. The numeral 4 represents a non-reversible motor and at 5 is shown a diagrammatic representation of mechanism for controlling the direction in which the driven shaft 6 shall be rotated by the motor 4. The particular mechanism employed for controlling the direction of rotation of the driven shaft 6 forms the subject-matter for and is fully set forth in Patent No. 1,209,146, December 19, 1916 and therefore is not disclosed in detail in the present case. The driven shaft has a crank 7 which engages in a suitable notch 8 in the throw-rod 3. 10 is a controller actuated by means of the cam 11 on the shaft 6 so as to move in accordance with the movement imparted to the throw-rod. 12 is the controller which is actuated by the locking member 13 of the lock-rod. 14 is the actuating means for the locking member, here shown as a double solenoid. 15 is the auxiliary locking device for the locking member of the lock-rod and 16 is the auxiliary looking device for the throw-rod. 18 is a signal post along the line of way, 18 and 18 the semaphores thereof, and 19 and 19 are the motors therefor. 21 is a lock lever. 22 is a switch lever, and 20 is a signal lever controlling the semaphores. 2-3 is a controlling means actuated by the lock lever. 24 is a controlling means actuated by the switch the lock rod and lever and 24 is a controlling means actuated by the signal lever. 25 is the source of power for operating the switch and signals.

The movement of the contact 26 of the controlling means 23 from engagement with the springs 27 and 28 into engagement with the springs 29 and 30, establishes a circuit as follows: from battery 25, to bus bar 31, through conductor 32, conductor 33, spring 29, contact 26, spring 30, conductor 34, to spring 35, contact 36, spring 37, conductor 38, to auxiliary lock solenoid 16 and common return 39, to battery 25. This energizes the lock solenoid 16, drawing the core 40 thereof upward and causes the locking dog 41, pivoted at 42, to move downward at its outer end so as to engage the locking collar 43von the driven shaft 6, and at the same time moves thecontact 44 from engagement with the springs 45 and 46 into engagement with the springs 47 and 48 and the contact 49 into engagement with the springs 50 and 51. This establishes a circuit as follows: from conductor 38, conductor 52, 47, conductor 53, to the coil 54 of lock solenoid 14, conductor 55, spring 51, contact 49-, spring 50 and common return 39. The energization of the coil 54 of the lock solenoid 14 moves the locking member 13 tov the left, thereby drawing the projection 56 out of notch 600 in the lockrod 2, thus releasing the same or unlocking the switch At the same time the contact 36 is moved out of engagement with the springs 35 and 37 and the contact 57 connectsup the springs 58 and 59. This cuts off power between the controlling means 23 and the actuating means or look solenoid 14, and auxiliary locking device or solenoid 16, thereby deenergizing 54 and 16 and causing the core 40 to move downward and the locking dog 41 to free itself from engagement with the locking collar 43.

It will further be noted that when the auxiliary locking device 16 was energized it ruptured the signal circuit 60 by moving the contact 44 out of engagement with the springs 45 and 46 and that the locking member 13 by moving to the left also ruptured the signal circuit 60 by moving the contact 61 out of engagement with the springs 62 and 63. l/Vhile the signal circuit 60 therefore is restored by the deenergization of the auxiliary locking device 16 at that point, it remains ruptured at the point where it passes through the controller of the lockingmember 13.

Connected to the controller 12 is a link 13 pivoted at 13 and provided with a member 13 rigidly connected to said link and having the end stops 13 and the intermediate stops 1.3 Carried by the core 13 is a projection 13.

When the parts are in the position shown spring 48, Contact 44, spring in Fig. 7 and the coil 54 is energized the projection 13 will engage one of the intermediate stops 13 and will thereby move the link 13 until it occupies a central or midposition permitting the projection 13 to continue its movement without imparting further motion to the link 13 The effect of this is to move the controller 12 sufliciently to cause the contact 57 to engage the springs 58 and 59 without causing the contact 36 to pass out of contact with the springs 35 and 37, so that the controller in this position connects up two paths for the power. This movement also breaks the engagement of contact 61 with springs 62 and 63, thus rupturing the signal circuit. The continued movement of the projection 13 will then eventually bring it against the left hand stop 13 causing the link 13 to tilt to the left imparting a second move ment to controller 12 which brings the contact 36 out of engagement with the springs 35 and 37.

Let us assume that, with the parts in the position shown in Fig. 7 current has been improperly supplied by a cross, or otherwise on line conductor 34. Then current would flow along this conductor from the point of cross through spring 35., contact 36, spring 37, conductor 38, coil of auxiliary locking device 16 and to common return conductor 39. After 16 is energized and shaft 6 held against rotation current would flow to the coil 54 of solenoid 14, thus causing the locking member 13 to move to the left (Fig. 1 and to the right Fig. 7 This would immediately establish a circuit through the coil 105 as contact 57 will at once be moved to the left (Fig. 1) to bridge the springs 58 and 59. The circuit established would be as follows: from battery 25, bus bar 31, conductor 32, spring 27, contact 26, spring 28, conductor 103, spring 58, contact 57, spring 59, conductor 104, coil 105, and common return 39, back to battery 25. This would immediately hold the locking member 13 in a mid position for the reason that contact 57 makes contact with springs 58-59 before contact 36 breaks contact with springs 3537, so that both coils 54 and of the solenoid 14 are simultaneously energized thereby neutral izing each other and destroying the pull of locking coil 54 on the member 13 before the movement of the locking member has been completed. In this mid position of the member 13 the switch is still locked, while at the same time shaft 6 is also held locked and these conditions will continue so long as current flows. Again assume that current has been improperly supplied within the switch machine apparatus to the conductor 38 by a cross or otherwise, with the parts in the positions shown in Fig. 1. In this condition the auxiliary locking do the springs 84 and 85,

vice 16 will first lock the shaft 6 and then energize coil 54 so as to move the locking member 13 to the left (Fig. 1), and, as before, it will be held in mid position. Furthermore the signal circuit will also remain ruptured in both of these cases at the point where it passes through the controller of the auxiliary locking device 16.

The first stage of operations having been completed, the operator moves the lever 22 to the left, thereby moving the contact 64 out of engagement with the springs 65 and 66 of the controlling means 24 and placing contact 64: between the springs 67 and 68.

he movement of the contact 64 into the position designated will establish a circuit as follows: from battery 25, bus bar 31, con ductor 69, conductor 70, spring 67, contact 64, spring 68, conductor 71, spring 72, contact 7 3, spring 74 of the controller 10, conductor 75, reverse magnet 76, conductor 77 toauxiliary locking device 15, and thence to common return 39 and battery 25. The reverse magnet 7 6 forms a part of the selective means 5 between the motor and the driven shaft 6 and when energized operates the reverse transmission device 79, which thereupon connects the motor 4 to drive the shaft 6 in a certain direction. The energization of the auxiliary locking device 15 causes the core 80 thereof to be moved upward, thereby moving the contact 81 away from the springs 82 and 83 so as to break the continuity of the signal circuit 60 at that point and move said contact into engagement with and at the same time causes the contact 86 to bridge the space be tween the springs 87 and 88. This establishes a circuit as follows: from the conductor 7 7, to conductor 89, spring 84, contact 81, spring 85, conductor 90, motor 1, motor field 91, conductor 92, spring 88, contact 86, spring 87 and common return 39, back to bat tery 25. This causes current to flow through the motor 1 which by its rotation and by means of the reverse magnet 76 and the differential transmission mechanism, causes the shaft 6 to be driven in a certain direction whereby the crank 7 engaging with the notch 8 of the throw-rod 3 moves the latter and throws the switch to reverse position. The rotation of the shaft 6 causes the cam 11 to actuate the controller 10, whereby the contact 73 is moved to the right, Fig. 1, and isout of engagement with the springs 72 and 7 1, thereby cutting off all power between the source 25 and the controlling means 2% and reverse magnet 76 and auxiliary locking device 15, whereby 76 and 15 are both deenergized. device 7 9 inoperative and destroys the circuit through the motor, restores the signal circuit 60 at the point where it passes through the auXiliary locking device 15 and causes the branch 60 of the signal circuit 60 to be This renders the transmissionruptured by the movement of the contact 93 away from the springs 94 and 95 in the controller 10, and closes the branch 60 of the signal circuit 60 where it passes through the controller 10 by causing the contact 93 to engage the springs 96 and 97. The movement of the switch further places the normal magnet 108 ready to be energized by moving the contact 99 into engagement with the springs 100 and 101 in the controller 10. It will be observed that the signal circuit 60 is still ruptured where it passes through the controller of the locking member 13. The cam 11 is constructed with a dwell so as to give a two part movement to the controller 10 in the same manner as the member 13 imparts a two part movement to controller 12.

This completes the second stage of operation.

It will be observed that had current been supplied to the motor 4: before the locking dog 56 had released the lock-rod 2, the encrgization of the auxiliary locking device 16 would have caused the lower end of the core 80 to have engaged in the notch 102 of the locking member 13 so that, while the motor 4 would have rotated, the lock-rod and the locking member therefor would both have been locked and the signal circuit would have been ruptured at the point where it passes through the controller of the auxiliary locking device 15.

The operator now moves the lever 21 back to the right, thereby causing the contact 26 to bridge the space between the springs 27 and 28. This establishes the following 011'- cuit: from the battery 25 to bus bar 31, conductor 32, spring 27, contact 26, spring 28, conductor 103, spring 58, contact 57, spring 59, conductor 104, to coil 105 of locking solenoid l4, and thence to common return 39 and back to battery 25. This energizes the said coil 105, drawing the lockin member 13 to the right, thereby causing the dog 56 to engage in notch 601 of the lock-rod 2, thus locking the switch. At the same time the contact 61 bridges the space between the springs 62 and 63 and completes the signal circuit 60 at that point, thereby permitting the clearing of signal 18 for the passage of traffic by moving the lever 20 to cause the contact 20 to engage springs 20 and 20 in controller 2 1 thereby supplying power to motor 19*. This completes the third stage of operations and also one complete cycle of movement of the switch.

When it is desired to move the switch from the reverse position to the normal position the lever 21 is moved to the left and the first stage of operations, as previously described, repeated. The operator now moves the switch lever 22 to the right and breaks the contact 64- between the springs 67 and 68, and causes it to bridge springs 65 and 66, thereby establishing the following circuit: from battery- 25 to bus bar 31, conductor 69, spring 65, contact 64, spring 66, conductor 106, spring 101, contact 99, spring 100, conductor 107, to normal magnet 108, conductor 7 7, to auxiliary locking device 15, and thence to common return 39, back to battery 25. This energizes. the said normal magnet 108, operating the normal transmission device 110, and further causes the energization of the auxiliary locking device 15 and an upward movement of the. core 80. This establishes the following circuit: from conductor 77, to conductor 89, spring 84, contact 81, spring 85, conductor 90, to motor 4, motor field 91, conductor 92, spring 88, contact 86, spring 87, and common return 39. This rotates the motor 4 which by means of the differential transmission mechanism 5 and the normal magnet 108 causes the driven shaft 6 to rotate in a directionopposite to that from which it rotated on the reverse movement, thereby causing the crank 7 to engage in the notch 8 of the throw-rod 3 and move the switch back to. normal position. The movement of the shaft 6 further causes the cam 11 to move the controller 10 to the left, Fig. 1, thereby moving the contact 99 out of engagement with the springs 100 and 101 and thus cutting off power between the controlling means 24 and the nor- Vmali magnet 108 and the auxiliary locking device 15, as well as the motor 4. The movement of the controller 10 further moves the contact 93 from engagement between the springs 96 and 97 into engagement with, the springs 94 and 95, thus breaking signal circuit 60 and closing signal circuit 60 at that point. This completes the second stage of operations of the normal movement of the switch. The lock lever 21 is now moved to the right to lock the switch in the same manner as described-in connection with the reverse movement of the switch so that the switch is now locked and the third stage of operation completed, and the complete cycle of movement of the switch to normal is finished. The signal 18 may now be cleared by supplying power to the motor 19 by means of the lever 20 It is obvious that the same safe-guards that were pointed out in connection with the unlocking, moving and locking of the switch on the reverse movement obtain on the normal movement.

When the switch is in either of its positions and locked up, it is cut off. from all power and is, as described, capable of nullifying the effect of any improperly supplied current, in that the application of such current to. the switch, machine only serves to lock it additionally. Should it. now be attempted to forcibly move the locking mem-v ber 13, by a maliciousperson or otherwise, so as to cause the lock-rod 2 tobe unlocked, it is evident that such movement will cause the contact member 57 to engage between the springs 58 and 59. This will immediately establish a circuit from battery to bus bar 31, conductor 32, spring 27', contact 26, spring 28, conductor 103., spring 58, contact 57, spring 59, conductor 104, coil 105 of locking solenoid 14, common return 39, back to battery 25. The efiect of this circuit, as previously pointed out, will be to cause the locking member 13 to be moved to the right, thereby locking the lock-rod 2 again. Thus the very act of unlocking the switch supplies power to the switch, whereby it will lock itself again automatically.

v Again, should it be attempted to move the throw-rod: 3, say after sawing through or otherwise breaking the lock-rod 2, then the very act of moving the said throw-rod will cause a movement of the controller 10. If the switch were in normal position and is moved to the reverse position, the contact 99 will bridge the springs 100 and 101 and a circuit will be established from battery 25, bus bar 31, conductor 69, spring 65, contact 64, spring 66, conductor 106, spring 101, contact 99, spring 100, conductor 107, normal magnet 108, conductor 77 auxiliary locking device 15 tocommon return 39, back to battery 25. This circuit would in turn, by reason of the energiza-tion of the auxiliary locking device 15, cause a circuit to be established through the motor as follows: conductor 77 conductor 89, spring 84, contact 81, spring 85, conductor 90, motor 4, motor field 91, conductor 92, spring 88, contact 86,. spring 87 and common return 39. The effect of thistcircuit would be to cause amovement of the switch back to its normal position. Similarly if the switch is in the reverse position and it should be attempted to move it to the normal position by a physical displacement of the throw-rod 3', a circuit would be established as follows: from battery 25, to bus bar 31, conductor 69, conductor 70, spring 67, contact 64, spring 68, conductor 71, spring 72, contact 73, spring 74,, conductor 7 5,. reverse magnet 76, conductor 77, auxiliary locking device 15, to common return 39, back to battery 25. The energization of the auxiliary locking device 15 would, as before, establish the circuit through the motor 4 and thus cause the switch to be moved to reverse position. It will further be noted that, if the lock rod 3 or the locking member 13 should be maliciously moved in the manner above described, the signal circuit 60 through these various controllers would be ruptured and prevent the giving of a signal for the passage of traffic. I i

It will, of course be understood that the parts comprising the switch machine are properly inclosed or housed, further that the controlling means 23, 24, 24 and levers 21, 22, 20 and interlocking therefor are housed in a suitable tower machine, and finally that the conductors leading from the tower machine to the switch machine are properly trunked or inclosed to protect the same from injury and exposure.

The controlling means situated in the tower machine may be of any suitable form, but preferably they are constructed as follows:

Since the levers 21, the present instance, of the same construction, only one will be described.

The lever 21 is pivotally supported at 550 and carries a latch 551 by means of which the latch die 552 can be raised or lowered. 553 is a stationary segment drawn on an arc of a circle whose center is the pivot 550. 554 is a movable segment having a segmental slot 555 drawn on an arc of a circle Whose center is the pivot 550 when the movable segment 554 is in its mid-position, and pivoted centrally at 556 directly above the pivot 550. One end of 554 is pivotally connected to the controlling rod 557 while the other end is connected to the shaft 125 by means of the bifurcated arm 127 and link 126 in such a manner that the rocking movement of 554 is imparted to the shaft 125. The latch die 552 is slidingly movable in the slot 555 and on the stationary segment 553. It will be evident that such movement will not cause the movable segment 554 to rock.

At each end of the stationary segment 553 is a notch 558 into and out of which the latch die 552 can be moved by manipulation of the latch 551, thereby causing the movable segment 554 to rock and impart movement to the controlling rod 557 and to the shaft 125.

22 and 20 are, in

The interlocking between the lock lever 21 and the switch lever 22 is preferably as follows, (Fig. 2):

The shaft 125 carries fixed to it a segmental gear 505 meshing with a rack 506 attached to the slidable bar 500. This bar 500 slides transversely in a notch in the frame bar 507. To the bar 500 is riveted the locking dog 501, the face of which is beveled. The frame bar 507 is provided longitudinally with guiding lugs which support a cross locking dog 502, the ends of which are beveled. Mounted in the frame bar 507 adjacent to the bar 500 is another slidable bar 504 carrying riveted to it a locking dog 508 having a beveled face. The beveled faces of the locking dogs 501 and 503 coiiperate with the beveled ends of the cross locking dog 502. The bar 504 is connected to the shaft 125 of the switch lever 22 by a rack and segmental gear in the same way as the shaft 125 of lever 21 is connected to the bar 500. v i i In the operation, the rocking of the shaft 1125 by the movement of the latch 551 of the lock lever 21, as described, moves the bar 500 (to the right in Fig. 2) and the locking dog 501 shifts the cross locking dog 502 to the right and engages it in front of the locking dog 503 and holds the bar 504 against movement. This prevents the movement of the shaft 125 of lever 22 and restrains the latter against movement.

The movement of the latch 551 when lock lever 21 is in normal position raises the latch die 552 out of the notch 558 thereby rocking the segment 554 and moving the controlling rod 557 sufficiently to bring the contact member 26 out of engagement with the springs 27 and 28 but not sufficiently to bring the contact member 26 into engagement with the springs 29 and 30. The rocking of the segment 554 also moves the interlocking between the levers 21 and 22 by turning the shaft 125 as described but not far enough to cause dog 501 to release cross locking bar 502; therefore switch lever 22 cannot yet be moved.

The lever 21 is now moved, the latch die 552 traveling through segment 554 with out rocking the same and over the surface of the segment 553; the controlling rod 557 remaining in its midway position above described so that the circuits are fully open. When the latch die 552 reaches the other end of the segment 553 the latch 551 is again manipulated, thereby lowering the latch die 552 into the other notch 558, rocking the segment 554, causing the contact member 26 to engage springs 29 and 30 and releasing the interlocking by turning the shaft 125 into the position for moving the bar 500 to the left in Fig. 2, whereupon the locking dog 501 releases the cross locking dog 502 so that switch lever 22 can now be moved.

The interlocking between the lock lever 21 andthe signal lever 20 is preferably as follows (Fig. 3)

7 When the lock lever 21 is placed in locked position, bar 500 will be moved to the right, see Fig. 3, thereby also carrying locking dog 510 also to the right. Bar 511 is driven by shaft 125 of signal lever 20 and has riveted to it a dog 512. As shown in Fig. 3 locking dog 510 prevents cross locking dog 513 from being moved and signal lever 20" cannot be reversed. But if lever 21 has been moved into locked position (see Fig. 1) dog 510 will no longer obstruct 513 and locking dog 512 can be moved to the left (Fig. 3). That is signal lever 20 can be reversed. It is also evident that with the signal lever 20 reversed to clear the signal, lock lever 21 cannot be moved to unlock the switch.

What is claimed, is:

1. A combined switch and signal control system comprising: a switch, operating means for unlocking, moving and locking the switch normally cut off from power,

means for supplying power to the operating means, a slgnal and circult therefor normally complete, and means for rupturing said signal circuit simultaneously with the supply of power to the operating means and before the operating means has begun to act.

2. A combined switch and signal control system comprising: a switch, operating means for unlocking, moving and locking the switch, controlling means for supplying power to the operating means, auxiliary locking means for locking the switch when power is improperly supplied to the operating. means, a signal and circuit therefor normally complete, and means controlled by the auxiliary lockin means for rupturing the circuit when said auxiliary means is in its locking position.

3. A combined switch and signal control system comprising: a switch, means for moving said switch, a lock-rod, a locking member for the lock-rod, a locking member for the switch, moving means, a signal and circuit therefor normally complete, and means connected to the lock-rod member for rupturing the signal circuit when the lock rod locking member is in its unlocking position or the locking member for the switch mov ing means is in its locked position.

4. A combined switch and signal control system comprising: a switch, a lock-rod, a: locking member for the lock-rod, means for moving said locking member into and out of its locking position, a signal and circuit therefor normally complete, means connected to the locking member for rupturing the signal circuit when the locking member is in its unlocking position, an auxiliary locking device for the locking member, and means controlled by said auxiliary locking member for rupturing the signal circuit when said auxiliary member is in its looking position.

5. A combined switch and signal control system comprising: a switch, means for locking said switch, means for moving said switch back and forth, a signal and a circuit therefor normally complete when the switch is in either position, and means, separate from said switch and the means for moving and locking said switch, for rupturing the signal circuit when the switch is moving from either position to the other position.

A combined switch .and signal control system comprising: a switch, a locking device for said switch, means for moving said switch back and forth, a signal and a circuit therefor normally complete when the switch is in either position, means for rupturing the signal circuit when the switch is moving from either position to the other position, an auxiliary locking device for the switch, and means controlled by aux? iliary locking device for rupturing the signal circuit when the said auxiliary device is in its locking position.

7. A combined switch and signal control system comprising: a switch, a throw-rod therefor, actuating means for said throwrod, a signal and a circuit therefor normally complete when the switch has been moved by the throw-rod int-o either position, and means for simultaneously locking the throw rod actuating means against movement and for rupturing the signal circuit.

8. A combined switch and signal control system comprising: a switch, a throw-rod therefor, actuating means for said throwrod, a locking device for said switch, a signal and a circuit therefor normally complete when the switch has been moved by the throw-rod into either position, means moving with the throw-rod for rupturing the signal circuit while the throw-rod is moving the switch in either direction, an auxiliary locking device for the switch, and means controlled by said auxiliary locking device for rupturing the signal circuit when the said auxiliary device is in tion.

9. A combined switch and signal control system comprising: a. switch, operating means for unlocking, ioving and locking the switch, a signal, and means actingto directly engage said switch locking means to prevent the operation of said locking means while the switch moving means is operating, said switch moving means, said switch locking means and said preventing means being adapted to control the operation of said signal.

10. A combined switch and signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means acting to directly engage said locking means or said moving means for preventing the operation of one of said means while the otherof said means: is operating, and means under the control of said locking means, said moving means and said preventing means for controlling the operation of said signal.

11. A combined switch and signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means for prevent ing the operation of either of said means while the other of said means is operating, and means under the control of saidpreventing means for controlling the operation of said signal. h

12. A combined switchand signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means for preventing the operation of said switch moving means while said locking and unlocking means is operat ng; a means under the C nt l f its locking posisaid preventing means for controlling the operation of said signal.

13. A combined switch and signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means for preventing the operation of said switch locking and unlocking means while said switch moving means is operating, and means under the control of said preventing means for controlling the operation of said signal.

14:. A combined switch and signal control system comprising: a switch, power actuated operating means for unlocking, moving and locking the switch normally cut off from power, a signal, a circuit for energizing said signal to clear the same, means sepa rate from said switch and said switch operating means for rupturing said circuit when power is applied to the operating means, and means for supplying power to the operating means.

15. A combined switch and signal control system comprising: a switch, means for locking and unlocking the switch, a circuit controller operated by said locking and unlocking means, means for moving the switch, a circuit controller operated. by said switch moving means, means for preventing the operation of one of said means while the other of said means is operating, a circuit controller operated by said preventing means, a signal, and a circuit including said signal and said circuit controllers, whereby each of said circuit controllers controls the operation of said signal.

16. A combined switch and signal control system comprising: a switch, means for locking and unlocking the switch, means for moving the switch, means for preventing the operation of either of said means while the other of said means is operating, a circuit controller operated by said preventing means, a signal, and a circuit including said signal and said circuit controller whereby said circuit controller controls the operation of said signal.

17. A combined switch and signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means for preventing the operation of said switch moving means while said locking and unlocking means is operating, a circuit controller operated by said preventing means, a signal, and a circuit including said signal and said circuit controller whereby said circuit controller controls the operation of said signal.

18. A combined switch and signal control system comprising: a switch, a signal, means for locking and unlocking the switch, means for moving the switch, means for preventing the operation of said switch locking and unlocking means while said switch moving means is operating, a circuit controller operated by said preventing means, a signal, and a circuit including said signal and said circuit controller whereby said circuit controller controls the operation of said signal.

19. In a power actuated system of switch and signal control, a switch, a signal, operating means for unlocking, moving and locking the switch, operating means for the signal, controlling means for supplying power to the signal operating means, auxiliary locking means for the switch which when in its locking position supplies power to the switch operating means and cuts off power from the signal operating means, and controlling means for supplying power to the auxiliary locking means.

20. In a power actuated system of switch and signal control, a switch, a signal, operating means for unlocking, moving and locking the switch, operating means for thesignal, controlling means for supplying power to the signal operating means, auXiliary locking means for the switch which when in its locking position supplies power to the switch operating means and cuts off power from the signal operating means, controlling means for supplying power to the auxiliary locking means, and controller means actuated by the switch operating means for cutting off power from the auxiliary locking device and for preventing power from reaching the signal operating means.

21. A combined switch and signal control system comprising: a switch, a signal, operating means for unlocking and locking the switch, means for moving the switch, means acting to directly engage the switch moving means to prevent the operation of said switch while the switch locking and unlocking means is operating, said switch moving means, said switch locking means and said preventing means being adapted to control the operation of said signal.

Signed at Pittsburgh, in the county of Allegheny and State of Pennsylvania, this 25th day of July, A. D. 1914.

GARDNER B. GRAY.

Witnesses:

MAX H. SROLOVITZ, GUY P. THURBER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. G.

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