US1221538A - Signal apparatus. - Google Patents

Description

1,2QL538o WITNESSES G. JACKSON, JR.

SIGNAL APPARATUS.

APPLICATION FILED FEB. 26, 1915.

Patented Apr. 3, 1 917.

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G. JACKSON, JR.

SIGNAL APPARATUS.

APPLICATION FILED FEB. 26. 1915.

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SIGNAL APPARATUS.

Application filed February 26, 1915.

To all whom it may concern:

Be it known that 1, GEORGE JACKSON, Jr., a citizen of the United States, residing at Hchokus, in the county of Bergen and State of New Jersey, have invented certain new and useful llmprovements in Signal Apparatus, of which the followingis a specification.

My present invention is an improvement upon the railway signal apparatus disclosed by my Letters Patent No. 11002 13, and it has for its objects, first, so] to construct the apparatus as to prevent the disturbance of the signal circuit under certain conditions to be hereinafter pointed out; and, secondly, to render the apparatus more sensitive and responsive to the contemplated actuating influence. In general, the object of the present invention is to increase the efficiency and reliability of the apparatus.

'Eeferringto the accompanying drawings,

Figure 1 is an isometric view showing my invention applied to a single-track railway system; and v Fig. 2 is a diagram of the apparatus.

The railway track and intersecting street, road or the like to be protected are respectively indicated by the characters a and b. The source of current for operating the apparatus in the. present instance consists of conductors including the feeder 0 and trolley wire d, supported by poles 6. Y

1, 2 and 3 designate a set of contacts arranged at each side of the intersection of the track and street, and 4 is another contact arranged at or near said intersection, such contacts being disposed in such proximity to the wire cl that the intervening space between any of them and the wire will be electrically bridged by the trolley wheel y of a vehicle passing over the railway.

The foregoing elements are or may be all substantially the same as in my patent aforesaid.

As in my said patent also, so in the present case, with certain exceptions to be noted, the conductor h extending from the feeder c and including the switch A for closing the circuit via this conductor and one (h) of its branches h 72, to ground, said branches respectively including the cores and windings of magnets B B, normally closed switches C C, and the signal 7 g and a fuse and snap switch or, the branches 2" i of a conductor 2', said branches extending from Specification of Letters Patent.

Patented Apr. 3, 1917. Serial No. 10,697. 3 i y I the contacts 2 2 and said conductor 2' including the magnet D and being grounded by being connected with it between C and m,- the branches j 7" of a conductor j, said branches extending from the contacts 1 l and said conductor j including the magnet D and being connected with branch it between switch G and w, the branches la is of a conductor is, said branches extending from the contacts 3 3 and said conductor 76 including the magnet E which has the switch C for its armature and being connected with conductor 7' between D and h; the conductor Z extending from the contact 1- and including the magnet E and being connected with conductor 2' between D and 'h; and the resistances R in the conductors h and j, one between m and the point where c joins h and the other in 7' between where j joins h and 7c joins j, are or may be all substantially the same as in my aforesaid patent.

In the present case, however, there is included in the branch it the auxiliary switch A, which, like switch A, is pivotally connected with conductor h and forms part of its branch 7t. Each of the wires 2' and 7' has a break therein whose terminals w w and to to afford rests which normally support the switches A A in the positions shown in Fig. 2, plates at a on said switches A A (and insulated therefrom) bearing against said rests or terminals and closing the circuits through 2' and 7'.

When a passing vehicle has set the signal 7 g by closing the circuit 2' 2' at, say, the lefthand contact 2, so that switch A is held by magnet B in the position to close circuit h h and leave circuit 9' open at w w, then closes the circuit 3' at the left hand contact 1, magnet D, instead of being energized, is completely uninfiuenced to attract switch A, because circuit y' is open at w to; when, however, the circuit Z is closed at 1 and C" is attracted by E and the signal circuit h h is thereby broken and, magnet B being deenergized, switch A closes the circuit j, and when the circuit j is next closed by the vehicle at the right hand contact 1, said circuit bein now closed at w 'w by plate u, magnet is energized and attracts A, closing the circuit h h at A B so that B continues to maintain circuit 2' open at 'w in while the vehicle passes right hand contact 2, thereby preventing the signal from being set. It will be understood that on the vehicle now passing right hand contact 3 circuit 70 will be closed and E being energized G" will breakthe circuit h h, and B being thereby denergized A will assume its normal position, leaving the sev-.

eral parts in statu quo. r r

I My present arrangement, it will thus be apparent, avoids completely any possibility of disturbance of the signal circuit by the closing at the relatively first contact 1 of the circuit of the means torender inactive the signal actuating means, because the latter circuit at that time is broken at another point, i. 6., w w M. It involves the further important advantage that both the switch A and the switch A may normally be made to rest relatively close to the cores of the attracting magnets D and D, respectively, which condition was necessarily absent in my patentedsystem where the single switch A had to have appreciable movement from magnets D B to magnets D B so that the power of D, for instance, would not prevail over B when the relatively first contact 1 was passed by the vehicle and so prematurely cause the signal to be suppressed.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent is 1'. In combination, a railway, a vehicle movable thereover and having a circuit closer, a source ofcurrent having a conductor extending along the railway, a signal,

a conductor l2, leading from the source conductor and having grounded branches h h, said branches respectively having normally open circuit-closing switches A A both connected with conductor 71. and branch h con- ".taining said signal, means to control the closing and opening movements of switch A including a grounded magnet-including conductor 71 having contacts 22 spaced from each other lengthwise of and arranged in circuit-closer-bridging relation to the sourceductor, and another magnet-including conductor j controlling switch A and having contacts 1 1 between contacts 2 2 and each side of contact 4 and in circuit-closer-bridg ing proximity to said source-conductor, conductors 2' and j having breaks normally closed by switches A and A, respectively.

2. In combination, a railway, a vehicle movable thereover and having a circuit closer, a source of current having a conductor extending along the railway, a signal, a conductor h leading from the source-conductor and having grounded branches h h, said branches respectively having normally open circuit-closing switches A A both connected with conductor h and branch h containing said signal, said branches further having normally closed breaks 0 c therein, respectively, means to cause closing movement of switch A including a grounded magnet-including conductor 2' having contacts 2 2 spaced from each other lengthwise of and arranged in circuit-closer-bridging relation to the source-conductor, means to break branch h at 0 including a grounded conductor Z having a contact 1 between contacts 2 2 and in circuit-closer-bridging relation to said source-conductor, means to cause closing movement of switch A including a grounded magnet-including conductor j having contacts 1 1 arranged each side of contact 4 and between contacts 2 2 and in circuit-closer bridging relation to the sourceconductor, branches 71. it having electromagnetic means to hold switches A A in closed position, and means to break branch h at 0 including a grounded conductor 7:: having contacts 3 3 arranged one at each side of the other contacts and in circuit-closerbridging relation to said source-conductor,-

conductors i and j having breaks normally closed by switches A and A, respectively.

copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents. Washington, D. G.

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