US688964A - Quadruple-relay crossing-signal. - Google Patents

Description

Patented Dec. 17. l90l.

B. N. PARBISH; (IUADBUPLE RELAY CROSSING SIGNAL.

(Application filed Aug. 1, 1900.)

(Ho Mndel.)

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I UNTTED STATES PATENT @rrrca BERT N. PARRISH, OF JACKSON, MICHIGAN.

QUADRUPLE-RELAY CROSSING SIGNAL.

SPECIFICATION forming part of Letters Patent No. 688,964, dated December 17, 1901.

Application filed August 1, 1900. Serial No. 25,546. (No model.)

To all whom it may concern.-

Be it known that I, BERT N. PARRISH, a citizen of the United States, and a resident of Jackson, in the county of Jackson, State of Michigan, have invented a new and useful Quadruple-Relay Crossing-Signal, of which the following is a specification.

The object of this invention is to employ in a signaling system a signal, either a bell or a semaphore, and two sets of relays located in endwise reverse order to each other at the crossing, each set consisting of a signal-circuit-reversing relay with normally open circuit and a track-circuit relay with a normally closed circuit, whereby in case trains were running close together and an incoming train or car should approach the crossing within the signaling radius before the outgoing train or car had advanced beyond the signaling radius said incoming car or train would give the warning-signal the same as the first incoming car (now outgoing) gave said signal.

In the drawings forming a part of this specification, Figure l is a diagrammatical view showing the system; Fig. 2, a side elevation of relays 4 and 5 in Fig. 1 with their arms 14 and 15, and Fig. 3 shows broken details of the signaling maker and breaker in Fig. 2 and below described.

Referring to the parts of the drawings pointed out by numerals, 4 represents the electromagnets of the track-circuit relays, and 5 the electromagnets of the signal-circuit relays. I term them sets of double relays. One set is for all purposes of effect and description considered as being on one side of the crossing and the other set on the other side of said crossing.

At 7 is the bell, or if a semaphore were used it would be located here or somewhere near the crossing. The regular line of rails of the main track are shown broken at 8. In the line of the track-rails 8 are two short blocksections 13 and an intermediate shorter blocksection 12 at the crossing. In the rail opposite is a long block-section at the crossing and extending out each way, as do also the block-sections 13, from the crossing a sufiicient distance.

The signal maker and breaker in Fig. 2 consists of the horizontal armature-arm 15 and relay 5 and the upright armature-arm 14, with its contact-plate 17 and its insulating-cap 16. The end of the arm 15 is bent down at 18 in position to contact with the contact-plate 17 and the insulating-cap 16 when the armaturearm 14: operates, as explained farther on.

The block-sections 10 and 13 are connected at both sides of the crossing by batteries 22 and wires 20 and 21. I

The circuits are traced in connection with a description of the operation.

The right and left hancl track-circuits are traced, beginning with batteries 22, over wires 21, block-sections 10, wires 26, relays 4, wires 25, block-sections 13, and wires 20. These circuits energize the magnets 4, normally holding their armature-arms 14: in an upright position, as in Fig. 2, and in contact with the magnets, thus closing the track-circuits. Shunting-circuits are established by the presence of the wheels of a car on the block-sections 10 and 13 and are traced from batteries 22 over wires 20, block-sections 13, wheels and aXle of car, block-section 10, and wires 21. Then a car is in this position at one side of the crossing, the track-circuit at said side is short circuited by robbing said trackcircuit of electric power from a battery 22, thus denergizing magnet t at said side.

The open signal-circuits are traced from battery 24:, wire 28, signal 7, Wires 31 27, contact-plate 17, armature-arms l5, and wires and When the magnets of the relays a are deenergized as and by the cause above stated, the armature-arms 14 swing over, as shown by dotted lines in Fig. 2, bringing the contact-plates 17 against the ends 18 of the armature-arms 15, making the signal-circuit and giving the signal, warning the people at the crossing of an approaching car.

The local cut-off circuits are traced from the battery 23, wires 35 33, relays 5, wires 3st 26, block-section 10, wheels and axle of car, and wire 35. Then an incoming car arrives at the crossing, with its front wheels on the block-sections 10 and 12, the signal stops, because the relays 5 become energized, raising arm 15 to the dotted position in Fig. 2 and disconnecting the end 18 of armature-arm 15 from the contact-plate 17 of arm 14. Wherf an incoming car has left the block-section 13 in its rear, the relay at in its rear becomes again energized, bringing its armature-arm 14: up to its normal position again. When the forward wheels of an outgoing car make the block-sections 10 and 13, the circuit be- Y tween the block-sections 10 and 12 being still closed by the rear wheels and axle of the car, the power of the battery 22 forward of the caris shunted, deenergizing the magnets of the relay 4 forward of the car, allowing the armature-arm 14 of said relay to fall back under the end 18 of armature-arm 15, and when the outgoing car has passed entirely otf from block-section 12 the relays 5 are deenergized, allowing the armature-arm 15 in front of the car to rest on the insulating-cap 16, as in Fig. 3, and thus provision is made for the outgoing car not to give the signal. At the same time the armature-arm 15 in the rear of the car is lowered to its normal position. The construction and operation set forth just above permit the signal being given by an incoming car from the same direction in which the now outgoing car came, while said outgoing car is still on section 13, thus avoidingtlanger' in cases where one train or car closely follows another. When the outgoing car has cleared the block sections 10 and 13, the armature-arms 14 and 15 immediately in its rear will he set again to their normal position.

The operation of the sets of relays and the circuits are of course the same, matters not from which way the ear approaches or which way it goes out.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

open relay signal-circuits common to the signal and common to both sets of the double relays, each adapted to be closed by contact of the armature having theinsulation-cap with the end of the other armature when the presence of an incoming car in proper section short-circuits the normally closed trackcircuit and adapted to be opened again when the car closes the circuit of the said second electromagnet raising both of their armatures, the construction and arrangement being such that when the outgoing car has passed intermediate block-section the armatures of the double relay in the rear of the car are set to their normal position, while the armatu res of the other double relay are prevented by the interposition of the aforesaid insulating cap from contacting to close the signal-circuit and are only reset when the outgoing car has passed all the block-sections substantially as set forth.

In testimony of the foregoing I have hereunto set my hand in the presence of two witnesses.

BERT N. PARRISII.

WVitnesses:

J. CLINTON BEARDSLEY, A. J. BROWN.

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