US895575A - Electric car-recording block-signal. - Google Patents

Description

"1101295575. PATENTED AUG. 11, 1908.

. W. J. MURRAY.

ELECTRIC GAR RECORDING BLOCK SIGNAL.

APPLIOATION FILED APE. 16,1907.

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PATENTED AUG. 11, 1908.

W. J. MURRAY. ELECTRIC CAR RECORDING BL OCK SIGNAL.

APPLICATION FILED APR. 16,1907.

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6 90. H. A .WWAWAWNANW 5 A 'No. 895,575. PATENTBD AUG. 11, 1908. W. J. MURRAY.

ELECTRIC OAR RECORDING BLOCK SIGNAL.

APPLICATION FILED APR. 16,1907.

3 SHEETSSHEET 3.

5 E] I W 67 ll] 76 t 26 6 l g 43 k 2.9 v q a 6 G v k I 27/2 5 5 39 ea cjmw/m W UNITED STATES PA TENT oFFreE.

WILLIAM J. MURRAY, OF LEAVENWORTH, KANSAS, ASSIGNOR OF ONE-HALF TO HERBERT W. WOLCOTT', OF LEAVENWORTH, KANSAS.

ELE C'IRIC CAR-RE CORD ING B LOCK-SIGNAL.

in connection with electric street and interurban car lines, and my object is to produce means whereby the entrance of a car into a block shall result in the operation of the signal to notify those in charge of cars approaching the opposite end of the block that the block is occupied and shall also afiect the signal mechanism so that a car subsequently entering the block from the same end as the car therein, shall not affect the signal unless the preceding car has first passed out of the block and restored the signal to normal condition.

A further object is to produce means whereby a car entering the occupied block from the opposite end from that entered by the car therein, shall not affect the signal mechanism and that the latter shall likewise be unaffected if said second car backs out of the block onto the same track or siding from which it entered.

A still further object is to produce a signal mechanism which will permit of the entrance of a predetermined number of carsseven in this instance-traveling in the same direction, into the block Without any of them affecting the signal except the first, but which in the event that another car traveling in the same direction enters the block, will reverse the si nal, that is will show clear at the end of the block toward which said cars are traveling and danger at the end at which said oars entered.

A still further object is to produce a signal mechanism which in the event of the entrance of a car into the block from the opposite end while the block is occupied by such eight cars and when therefore the signal is safety will result in reversing the signal in front of said entering car from safety to danger in order to Warn those in charge of the car to back out of the block until the cars therein have all passed out and have by suc- Specification of Letters Patent.

Application filed April 16, 1907.

Patented Aug. 11, 1908.

Serial No. 368,587.

cessively influencing the mechanism, eventually restored the signal to normal or clear condition.

To these ends the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawings, in which- Figure 1, is a plan view of the main relays and the circuit making and breaking mechanism actuated thereby. Fig. 2, is a side view of the same with a part broken away. Fig. 3, is a section on the line IIIIII of Fig. 2. Fig. 4, is an enlarged section on the line IV Fig. 1. Fig. 5, is a section on line VV of Fig. 1. Fig. 6, is a central longitudinal section of one of the conductors in circuit with the trolley wires at the opposite end of the block. Fig. 7 is a section 011 the line VIIVII of Fig. 6. Fig. 8, is a central vertical longitudinal section of the preferred type of construction of the device shown in Fig. 6. Fig. 9, is an end view of the same. Fig. 10, is a diagrammatic view of a block and the signal mechanism therefor. Figs. 11 and 12, are diagrammatic views of modified forms.

Referring first to the main relay construction, 1 indicates a bed of wood or its equivalent, and 2 and 3 similar electro-magnets or relays mounted thereon.

4 and 5 indicate res ectively the armatures for such relays and 6 evers carrying said armatures and mounted upon suitable brackets 7, the armatures being normally held yieldingly away from the relays by springs S mounted on rods 9 secured in any suitable manner to the bed 1 and extending through the levers as guides therefor, nuts 10 being secured to the upper ends of said rods 9 to prevent the springs moving the armatures too far from the relays.

11. and 12 indicate pawls depending ivotally from the ends of the levers of re ays 2 and 3 respectively, the lower ends of said pawls fitting and having play in substantially tubular guide arms "13 projecting from the caps 14 which in conjunction with blocks 15 form bearings for the transverse shaft 16, said shaft being equipped with a toothed wheel 17 engaged by a detent or resilient brake 18 for the purpose of preventing the shaft from being turned accidentally or from being turned more than a predetermined distance.

19 and 20 indicate ratchet wheels secured rigidly upon opposite ends of shaft 16 and having their teeth disposed in opposite directions, said ratchet wheels being arranged vertically below pawls 11 and 12 respectively, in order that the energization of one of said magnets shall result in causing the pawls actuated thereby to engage its respective ratchet wheel and rotate shaft 16 one step, the direction of rotation being according to which relay is energized.

21 and 22 indicate cams secured rigidly on shaft 16, said cams being approximately semicircular in form and so disposed that when in normal osition,that is when the block is unoccup1edthey present, When viewed from the side, a V-shapedopening as shown by Fig. 5, such opening being occupied by l the anti-friction rollers 23 carried by the switches 24 and 25 hinged as at 26 to a standard 27 mounted on the bed, switches 24 and 25 being arranged respectively in the vertical planes of the cams 21 and 22.

The outer ends of the switches are preferably provided with cups 28 carrying carbons or other good contacts 29 for engagement with other good contacts 30 fitting slidingly in sleeves 31 and held yieldingly depressed therein by springs 32 hearing at their upper ends against spring cotters 33 carried by the sleeves, the conductors 30 having their lower ends reduced to provide shoulders 34 to rest upon the inwardly flanged lower ends 35 of the sleeves when such contacts are not engaged by their respective contacts 29. The sleeves are carried by contact plates 36 and 37 mounted upon an insulating standard 38, and secured in any suitable manner to the bed contiguous to standard 38 is a support 39 for switches 24 and 25 when occupying their depressed or inoperative positions.

40.and 41 indicate trolley wires at opposite ends of the block for cars traveling toward the latter, and 42 the trolley wire of the block connecting trolley wires 40 and 41, said trolley wire 42 being also connected to the trolley wires 43 and 44 at op osite ends of the block for cars leaving the atter.

Conducting appliances for each of the wires 40, 41, 43 and 44 are preferably constructed as follows :45 indicates a wood or other insulating bar of suitable length provided in its upper side with a longitudinal groove 46 opening at each end in a bifurcation in the end of the bar. 47 and 48 inclicate parallel angle plates secured to the underside of bar 45 at opposite sides of its bifurcations, the inner arms of said angle plates terminating in upwardly and outwardly flared ends 49 for a purpose hereinafter explained. The bars 45 are fitted against the underside of the trolley wires at the proper points so that the latter shall extend through grooves 46. Wedges 50 are then driven into the ends of the bifurcations above the wires to produce the arch in the wire shown by Fig. 8, the wedges having upwardly disposed shoulders 51 to bear against the underside of bar 45, and longitudinal grooves 52 in their tapered undersides to re ceive the wires and guard against lateral movement thereof as shown in Fig. 9. After the wires are thus secured to the bars as explained, the latter are secured to the overlying cap boards 53 supported in any suitable manner above the normal plane' of the trolley wire, said capboards being preferably provided with longitudinal grooves 54 which mate with grooves 46 and form passages for the trolley wires. 55 are conductors connecting the trolley wires with conductors 56, which conductors in turn are connected b conductors 57 to the angle plates 47. It will thus be seen that the trolley wires are always electrically connected to angle plates 47 and are adapted at times to be electrically connected by the trolley wheels 48 as hereinafter explained, to the angle plates 48 of the conducting appliances. The trolley wire 40 is connected by conductor 58 to a contact post 59, which post when the block is unoccupied is electrically connected by a spring-actuated bar 60 to a second contact post 61. connected by conductor 62 to relay 2. The angle plate 48 of the conducting appliance of trolley wire 41 is connected by conductor 63 to contact post 64, which when the block is not occupied by a car is connected by a spring actuated bar 65 with a contact post 66 con nected by conductor 67 with relay 3, the re lays 2 and 3 being grounded by conductor 68,

and in order to avoid danger of burning out said relays, lamps 69 or other resistance devices are connected up in series with the relays. 70 indicates a conductor leading from trolley wire 43 to the switches 24 and 25. 71 is a conductor electrically connecting plate 36 with the ground wire 72, and arranged on said conductor 71 near one end of the block is a danger signal either of the audible or visual type or both, that shown, being a series of red lamps 73. An electro magnet 74 is also in circuit with said wire and adapted when energized to attract its armaturebar 65 and break the circuit between contacts 64 and 66 as shown in Fig. 10. Also located on said conductor 71 at or near the opposite end of the block is a safety signal which like the other may be of any desired type or plurality oftypes, the signal shown preresenting a series of white lamps 7 76 indicates a conductor electrically connecting plate 37 with the groundpreferably through ground conductor 7 2, and in circuit with said conductor 76 at the same end of the block as the danger signal 73 is a safety signal, shown as white lamps 77. Also in circuit with conductor 76 is an electro-mag net 78 which is adapted when energized to attract its armature bar 60 and thus break the circuit between contact posts 59 and 61. Also in circuit with said conductor 76 and at the same end of the block as the safety signal 75 is a danger signal, preferably in the form of a plurality of red lamps 79. 80 is a conductor connecting the angle plate 48 of trolley wire 43 with relay 3 and 8,1 is a conductor connecting the angle plate 48 of trolley wire 44 with relay 2, it being noticed that the drawing shows conductors 80 and 81 connecting conductors 67 and 62 respectively.

In Figs. 6 and 7 which represent a modification of the conducting appliance detailed in Figs. 8 and 9, 82 indicates a board equipped at its underside with parallel angle plates 47 and 48 and with a longitudinal rib 83 which increases in thickness toward its ends and is provided with a longitudinal groove 84 in its lower edge to receive the trolley wire as shown, the trolley wire being arched to correspond with the lower edge of the rib. The trolley wire is also connected by conductors 55, 56 and 57 with angle plate 47 as shown by Figs. 8 and 9.

In practice, as a trolley wheel passes under one of the conducting appliances, the wheel W comes into engagement with angle plates 47 and 48 and by reason of the arch in the contiguous portion of the wire rides wholly on said angle plates for part of their length so as to insure a positive connection therewith, the circuit through the motor or motors of the car being undisturbed because the trolley wire is electrically connected to the contact plate 47 upon which the trolley wheel rolls.

WVhen the block is unoccupied, the signal device, or lamps is turned off and consequently contacts 60 and 65 are respectively engaged with contact posts 59, 61, 64 and 66, thelamps being turned off because the antifriction rollers 23 are engaging the inoperative faces of the cams 21 and 22, at which times switches 24 and 25 are out of engagement with contacts 30. Now as the trolley wheel of a car traveling in the direction indicated by the arrow, Fig. 10, comes into engagement with angle plate 48 of the conducting appliance of trolley wire 40, a current passes from said angle plate through 58, 59, 60, 61, 62 and 2, to the ground through conductor 68 and the resistance device 69. The completion of this circuit results in the energization of relay 2 and the attraction of its armature and consequently through the medium of its lever 6 and pawl 11, effects the retation of shaft 16 to the extent of one step in the direction indicated by the arrow, Fig. 2, the result being cam 21 raises switch 24 until its contact 29 engages its companion contact 30 and thus completes a circuit as follows from trolley wire 43, through conductor 7 (1,

switch 24, plate 36, and conductors 71 and 72 to the ground, the completion of this circuit turning lamps 73 and on so as to display the danger signal at the remote end and the safety signal at the contiguous end of the block. Such current also energizes magnet 74 and attracts its armature 65 and breaks the circuit between contact post 64 and 66. As a result of the breaking of this circuit a car entering the block from the opposite end fails to energize relay 3 and therefore does not affect signal 73 or 75 nor operate signals 77 and 79, it being obvious in this event that the duty of the person in control of the car is to back it out of the block and wait until the latter is clear.

As a seco'ndcar enters the block from the end where the safety signal is displayed it likewise fails to affect the signals but completes a circuit through trolley wire 40 conductor 58, 59, 60, 61, and 62, relay 2, lamp 69, conductor 68 to ground, the energization of relay 2 turning shaft 16 one step in the same direction as before, cam 21 revolving a second step without affecting the position of switch 24 and therefore without breaking the circuit through signals 73 and 75. As the parts are thus arranged six additional carseight in allmay enter the block from the same end, the eighth car entering causing cam 21 to make the eighth step. As this eighth step is made, the roller 23 of switch 24 drops off the opposite end of cam 21 and breaks the circuit through signals 73 and 75 and at the same time the end of the companion cam, in alinement with the end of cam 2 1 off which the roller of switch 24 drops, comes into engagement with the roller 23 of switch 25 and raises the latter until its contact 29 engages contact 30 in circuit with plate 37. As a result of the breaking of the circuit throughsignals 73 and 75 magnet 74 is demagnetized and armature 65 is retracted and makes contact with posts 64 and 66. The raising of switch 25 completes a circuit through trolley wire 43, conductor 70, switch 25, and conductor 76 to ground conductor 72, the current of course passing through the safety signal lamps 77, electro-magnet 78, and danger signal lamps 79 so that said signals 77 and 79 are operated the instant signals 73 and 75 cease to operate, the danger signal 79 warning any additional cars from entering the block from the same end as those already therein, energization of magnet 78 attracting armature 60 and breaking the circuit through post 59 and 61 so that an additional car entering from said end would do so in the face of the warning and would not affect the signal because of the break in the circuit between posts 59 and 61. On the other hand should a car enter the block from the opposite end while the block is thus occupied by the eight cars referred to it will reverse the signal ahead of it and thus receive warning to back out of the block onto its own track. It reverses the signal because armature makes connection between posts 64 and 66 so that the circuit is as follows: trolley wire 41 throughthe conducting appliance, conductor 63, post 64, conductor 65, post 66, conductor 67, through the relay 3, lamps 69 and conductor 68 to the ground, this circuit energizing relay 3, which attracts its armature 5 and thereby operates the lever 6 connected thereto and pawl 12, which pawl engages ratchet wheel 20 and rotates shaft 16 one step oppositely to the direction in which it was rotated by the energization of magnet or relay 2. The rotation through pawl 12 therefore causes cam 21 to relevate switch 24 and cam 22 to permit switch 25 to drop back to its original position, the completion of the circuit through switch 24 of course operating the danger signal in front of the car entering or about to enter the block, it being understood of course that the signals are so arranged that the motorman of the car may see them before the car actually reaches the single track for the purpose of avoiding the possibility of such car coming into collision with oppositely traveling cars on the single track, it being likewise understood that, as in this instance, the last of nine cars traveling in the same direction, will also see the danger signal at his end of the block before he actually reaches the single track.

It will thus be seen that with fifteen teeth on the ratchet wheels, eight cars traveling in the same direction can occupy the block at the same time, the first one entering operating the safety signal at the end of the block, entered, and danger signal at the opposite end, the last one of the other seven cars reversing the signals in the same manner that they would be reversed by a car entering the block from the opposite end. If only one car occupies the block, it restores the signals to normal condition as it passes out of the block, the circuit, in the event of the car traveling in the direction indicated by the arrow, being completed from the trolley wire 43, through conductor 80, relay 3, lamps 69 and conductor 68 to ground, the energization of relay 3 rocking shaft 16 back the step which it was advanced when the car entered the block, it being understood that when the signals are normal or dead both switches are down so that the circuits through the signals are broken. A car leaving the block from the opposite end will complete a circuit from the trolley wire 44, 81, 62, relay 2, lamps 69 and conductor 68 to ground and thus cause shaft 16 to be rotated backward the same distance it was rotated forward when the car entered the block from the opposite end.

In Fig. 11, 85 indicates the trackway of 65 the block and at the entrance thereof are short plates or equivalent devices 86, 87, and at the exit ends similar conductors 88 and 89. The conductors are connected respectively to wires 58, 63, 80 and 81 and each car, not shown, has its trolley electrically connected in any suitable manner, indicated at 90, to the brush 91 to engage the proper contact plate as the car passes and thus complete the circuit through the connected relay as described, the drawing showing the connection at the lower left hand corner of Fig. 11 with the car traveling in the direction indicated by the contiguous arrow.

In Fig. 12 a third rail system is shown, the third rails being numbered 92 and 93. On both the tracks by preference are plates 94 and 95 at the entrance ends of the block and 96 and 97 at the exit ends of the block, and said plates are respectively connected to conductors 58, 63, 80 and 81, and each car is adapted to be electrically connected as for instance at 98, with the third rail, and is provided with a brush 99 to engage the plate in its path as the car passes the latter and thus establish an electric connection between the third rail and the wire 58, 63, 80 or 81, as the case may be, as and for the purpose hereinbefore explained. It will thus be seen that this block signal can be adapted for use in connection with a trolley system in which the cars are provided with brushes to engage the plates 86, 87, 88 or 89 or with a third rail system.

From the above description it will be apparent that I have produced an electric block signal system possessing the features of advantage enumerated and Iwish it to be understood that I do not desire to be restricted to the exact details of construction shown and described as obvious modifications will sug gest themselves to one skilled in the art.

Having thus described the invention what I claim as new and desire to secure by Letters-Patent, is

1. In an electric block signal system, a pair of contacts, a pair of switches therefor normally out of engagement with their respective contacts, and means to operate with a step by step movement and advance one of the switches into engagement with its contact with the first step and on a subsequent step effect the simultaneous withdrawal of the advanced switch and the advance of the other switch into engagement with its respective contact.

2. In an electric block signal system, a pair of contacts, a pair of segmental cams, a pair of switches engaging the cams and adapted when the latter occupy their normal positions to be out of engagement with the contacts, and means to operate said cams simultaneously with a step by step motion to cause one of them on its first step to move its respective switch into engagement with one of the contacts, and on a subsequent step to effect the simultaneous withdrawal of such switch and the movement of the other switch into engagement with the other contact.

8. In an electric block signal system, a pair of contacts, a pair of segmental cams, a pair of switches engaging the cams and adapted when the latter occupy their normal positions to be out of engagement with the contacts, a relay, means to energize the same at intervals, and means caused by each energization of said relay, to operate said cams simultaneously with a step by step motion to cause one of them on its first step to move its respective switch into engagement with one of the contacts and on a subsequent step to effect the simultaneous withdrawal of such switch and the movement of the other switch into engagement with the other contact.

4. In an electric block signal system, a pair of contacts, a pair of segmental cams, a pair of switches engaging the cams and adapted when the latter occupy their normal positions to be out of engagement with the contacts, a pair of relays, means whereby the energization of one of them shall impart rotary movement to the cams to cause one of them to advance its respective switch into engagement with one of the contacts, and means whereby the energization of the other relay shall reverse such operation of the cams and effect the withdrawal of the advanced switch and upon a second energization shall advance the companion switch into engagement with its respective contact.

5. In an electric block signal system, a pair of contacts, a pair of segmental cams, a pair of switches engaging the cams and adapted when the latter occupy their normal positions to be out of engagement with the contacts, a pair of relays, means whereby the first energization of either of said relays shall rotate said cams and advance the switch engaged with one of them in engagement with its respective contact and its last energization shall effect the withdrawal of said switch and the simultaneous advance of the companion switch into engagement with its respective contact, and means whereby the first energization of the other relay shall effect the withdrawal of the second switch from its contact and the rengagement of the first switch with its respective contact and the last energization of said relay the withdrawal of the first-named switch from engagement with its respective contact.

6. In an electric block signal system, a pair of contacts, a pair of switches therefor normally out of engagement with their respective contacts, means actuated by a car to advance one of the switches into engage- ,ment with its respective contact and adapted to be actuated by a subsequent car traveling in the same direction to effect the withdrawal of said switch and the simultaneous advance of the other switch into engagement with its respective contact.

7. In an electric block signal system, a shaft suitably journaled, a segmental cam rigidly mounted thereon, a contact, a switch engaging the cam, a circuit including a live conductor, danger and safety signals at opposite ends of the block and said switch and contact, a second circuit including said liveconductor, a conducting appliance, and a relay, a third circuit including said live conductor, a conducting appliance and a relay, means carried by a car for successively completing the second and third circuits as it enters and leaves the block respectively, by establishing electric connection between the live conductor and said conducting appliances, instrumentalities actuated by the energized relay of the second circuit to rotate said shaft in one direction and cause the cam to operate the switch and complete the first circuit through said signals, and instrumentalities actuated by the energized relay of the third circuit to reverse the operation of said shaft and effect the withdrawal of said switch and the breaking of the circuit through the said signals.

8. In an electric block signal system, a shaft suitably journaled, a segmental cam rigidly mounted thereon, a contact, a switch engaging the cam; a circuit including a live conductor, danger and safety signals at opposite ends of the block, an electro-magnet and said switch and contact; a second circuit including said live conductor, a conducting appliance, a yieldiugly-retracted armature for said magnet, and a relay; a third circuit including said live conductor, a conducting appliance and a relay; means carried by a car entering the block for establishing electric connection between the live conductor and the conducting appliance of the second circuit, instrumentalities actuated by the energization of the relay of said circuit to rotate said shaft a predetermined distance to cause its cam to operate the switch and complete the circuit through the signals and its energized magnet and break the second circuit by the attraction of said armature, instrumentalities actuated through the completion of the third circuit by the car and the consequent energization of the relay of said third circuit to reverse the operation of the shaft to cause said cam to effect the withdrawal of said switch to break the circuit through the signals and said magnet.

9. In an electric block signal system, a shaft suitably journaled, a pair of segmental cams rigidly mounted thereon with one end in transverse alinement and the opposite end at opposite sides of a plane extending from their transversely alined ends through the axis of said shaft, a pair of contacts, a pair of switches having portions adapted at times to project into the paths of said cams at the opposite side of the shaft from the alined ends of the cams; a circuit including a live conductor, danger and safety signals at opposite ends of the block, one of said switches and one of said contacts; a second circuit including said live conductor, a conducting appliance, and a relay; a third circuit including said live conductor, a conducting appliance and a relay; means carried by a car for successively completing the second and third circuits as it enters and leaves the block respectively, by establishing electric connection between the live conductor and said conducting appliances; instrumentalities actuated by the energized relay of the second circuit to rotate said shaft in one direction and cause one of said cams to operate its switch and complete the first circuit through said signals, instrumentaliti'es actuated by the energized relay of the third circuit to reverse the operation of said shaft and efiect the withdrawal of said switch and the breaking of the circuit through said signals; danger and safety signals connected to the ground and to the other of said pair of contacts and located at opposite ends of the block, the danger signal being disposed at the same end as the safety signal of the first-named signals, and a fourth circuit including the live conductor, the relay of the third circuit and a conducting appliance at the same end of the block as the conducting appliance of the third circuit; said fourth circuit being adapted to be completed by the entrance of a car into the block traveling in the opposite direction to the first-named car and thus effect a second reverse step of the second cam and the operation of the second set of signals.

10. In an electric block signal system, a shaft suitably journaled, a pair of segmental cams rigidly mounted thereon with one end in transverse alinement and the opposite end at opposite sides of a plane extending from their transversely alined ends through the axis of said shaft, a pair of contacts, a pair of switches having portions adapted at times to project into the paths of said cams at the opposite side of the shaft from the alined ends of the cams, a circuit including a live conductor, danger and safety signals at opposite ends of the block, one of said switches and one of said contacts; a second circuit including said live conductor, a conducting appliance, and a relay; a third circuit including said live conductor, a conducting appliance and a relay; means carried by a car for successively completing the second and third circuits as it enters and leaves the block respectively, by establishing electric connection between the live conductor and the conducting appliances; instrumentalities actuated by the energized relay of the second circuit to rotate said shaft in one direction and cause one of said cams to operate the switch and complete the first circuit through said signals, instrumentalities actuated by the energized relay of the third circuit to reverse the operation of said shaft and effect the withdrawal of said switch and the breaking of the circuit through said signals; danger and safety signals connected to the ground and to the other of said pair of contacts and located at opposite ends of the block, the danger signal being disposed at the same end as the safety signal of the firstnamed signals; a fourth circuit including the live conductor, the relay of the third circuit and a conducting appliance at the same end of the block as the conducting appliance of the third circuit; said fourth circuit being adapted to be completed by the entrance of a car into the block traveling in the opposite direction to the first-named car and thus effect a second reverse step of the second cam and the operation of the second set of signals; and a fifth circuit including the live conductor, the relay of the second circuit and a conducting appliance and adapted as the last-named car passes out of the block to establish connection between said live conductor and the last-named conducting appliance to cause the relay of the second circuit to operate the shaft one .step in the same direction as the first step and thus break the circuit through the second set of signals.

In testimony whereof I affiX my signature, in the presence of two witnesses.

WILLIAM J. MURRAY.

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