US1152448A - Railway signaling. - Google Patents

Description

T, S. STEVENS.

RAILWAY SIGNALI'NG, AP PLzcAnmq FILED XUNE 7. 1912.

Patenmd Sept, 7; 1915 3 SHEETS-SHEEI a.

' 'INVENTOR. 1

' AT NEi WHMSSES m {mi/hm T. S. STEVENS.

RAILWAY SIGNALING. APPLICATION HLED JUNE 1. 1912.

Patented Sept. 7, 1915.

3 SHEETSSHEET 2.

v ATTORNEY.

INVENTOR. a?

aim/m a GE WITNESSES WV T. S. STEVENS,

RAILWAY SIGNALING.

mu) JUNE ifmz.

APPLICATlGN 1,15%.Ms,

Pntenfedfiept. 7, 1915.

-3 SHEETS-SHEET 3.

.. m UE WITNESSES g/fl/ Y MMA is: 7a:

ersirssrxrnnr oFFroE.

H'TG'PEKA, KANSAS, ASSIGNOR TO THE UNION SWITCH & SIGNAL EVA-I 1:3, PENNSYLVANIA, A CORPORATIGN OF PENNSYLVANIA.

RAILWAY SIGNALING.

e. P535) s Specification of Letters Pctent.

implication filed June 7, 1912. Serial No. 702,209.

' T may concern at I, Tnosms S. STnrnN's,

n of one united States, residing, at

in. the county of Shawnee and State invented certain new and in Railway Signaling,

. lowing a. specification.

' on relates to the uutonm-tic con- .ipply of energy to certain dcmay he regulated.

cularly my invention relates to control of lamps or other energy in a railway sige control being such that u, current is supplied to s .ioes in advance of the our invention is applied tom and specili l of the current iloyed in such dong the rail- 1 of a portion of a rail- .-lii.--:l thereto a cling v invention. Figs. 2 s but illustrating 1nodiring; my invention. cc chirccters designnte f the figures.

' invention I provide 'ucl *cuit which truck circuit 'ie supply of device such nice of the no of my insi nuling i; iished, and the nducted only when .W l that signal, and n economy in the operation of obtained. The same he ohsuined with other rings, in each designate three a railway track,

consumption of energy proceeds along the railwaywhich sections are protected respectively by railway signals S. S and S Each of these signals as here shown comprises a semaphore for daylight indications and an electric lump L, Lhor L for night indicutions; The block sections are provided with track circuits; as here shown one track circuit is provided for each block section although it is understood that I do not limit myself to this particular number. As usual, each track circuit comprises a source of signaling current, the track rails of the block section or portions of them, and a track relay. As here shown the sources of signaling current are transformers T, T T etc, the secondary windings 10, 11 and 12 of which are connected with the track rails of the block sections. The primary windings of these transformers T, T T etc, are connected with transmission conductors 13 which are supplied with an alternating current from any suitable source, which source is not shown in the drawings.

ll, R and R are track relays which may he oi. any desired type operable by an alternating signaling current. They are of the induction motor type each comprising a winding connected with the track rails, and a short-circuited member which actuutes contacts for the control of the signal for the corresponding. block section. For example. the contacts operated by relay R control the circuit for signal S the source of current for which circuit is another secondary winding 14 of transformer T The circuits for signals S and S? are similarly controlled by track relays R and R respectively.

Included in each track circuit between the source of current and the track rails are means for the control of the supply of current to the signal lamp for the next succeeding block section. I will now describe three forms of means for such control, refer-ring separately to each of the views.

Referring to Fig. 1,.the means here shown is in'the form of a re1sy,'17, 18, 19, designate circuit which includes a source of current and a contact or contactswhich are opened and closed by the armature of the relay device for the preceding track circuit. For example, "the circuit for lamp L includes a secondary winding 20 of transformer T and a contact or contacts 21 which are controlled ttythe relay 18. Each relay, 17, 18, 19, etc, is so adjusted that when the rails of the track circuit are not occupied by a car or train, the current which flows in the winding of the relay is not sufiicient to have it attract its armature to close the contact 21; but when the rails of the track circuit are bridged by a car or train, thereby shunt ing out the resistance of the track winding of relayR, the increased current drawn from the source 10,11 or 12 flowing through the winding of the relay is suflicient to have the relay attract its armature to close the contact 21. Hence when block section A is occupied by a car or train as indicated by the wheels and axle IV, lamp L of signal S v becomes illuminated Lamps L and L are controlled respectively by relays 17 and 19 in a similar manner.,

Referring now to Fig. 2, a lampcontrolling means is here shown comprising a trans-v former 22, 23 or 24, whose-primary winding 15 lncluded in atrack circuit and whose secondary wlndmg is connected Wlllll a relay 25, 26 or 27. Each relay 25, 26 and 27 controls a contact or contacts included in the lamp circuit like that illustrated in Fig. 1.

The adjustment of the parts is such that when the block section A is unoccupied, the

current in the, primary of transformer, 23'

is insufficient to cause relay 26 tobe energ zed, but that when block section A is occu:

pied by a car; or train indicated by the wheels and axle W, the increased current in the primary of transformer 23 causes relay 26 to be energized so that its armature closes the circuit for lamp L The control of signal lamps L and L by transformers and 24 and relays 25 and 27 is similar to that just explained for lamp L Referring now to Fig. 3, the lamp controlling means hereshown is similar to that shown in 'Fig. '2, except that the signal lamps are energized directly from the secondaries of transformers 22, 23, and 24 respectively, instead of through a relay device. For examplelamp L is connected directly in circuit with the secondary of transformer 23. The parts are so adjusted that when block section A is unoccupied, the current. in the primary of transformer 23 is insuflicient to illuminate lamp L or is at the most sufiicient to illuminate the lamp only faintly. but that when block section A is occupied by acar or train as indicated by the wheels and axle \V. the currentdrawn from the source 11 is then sutlicient to cause the full illumination of lamp L Although-I have herein shown and de-v scribed onl three forms of apparatus and circuits embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is a .1. In combination, a plurality of succe sive sections of a railway track; track circuits for the sections each including a source of energy and a track relay connected with the rails of a section; signals for the sections controlled by said track relays, lamps for the signals for giving signal indications at night, a second relay for each section receiving energy from the connection between the source of energy and a rail of the section, and a circuit for a lamp of each signal, said lamp circuit being controlled by said second relay for the section in the rear. 2. In combination, a plurality of successive sections of a railway track; track circuits for the sections each including a source of alternating current and a track relay connected with the rails of a section; signals for the sections controlled by said track relays, lamps for the signals for givin signal indications at night, a transformer or each section whose primary receives current from the connection between the source of current and one rail of the section and a circuit for .a lamp of each signal, said lamp circuit being controlled by the secondary of the transformer for the section in the rear.

3. In combination, a railway track divided into a plurality of successive sections, track circuits for the sections each comprising a source of current connected with the rails and a track relay'also connected with the rails, signals for the sections controlled by said'rela-ys, -lamps for the signals for giving signal indications at night, and means for each section receiving current from the connection of' the source of current with a rail of the section for controllingthe lamp of the signal. for the section next in advance.

4. In combination, a plurality of successive sections of a railway track, means for each section for supplying signaling ourrent to the rails of the section, a relay for trical devicebein'g arranged to be short-circnited when a train enters the block section illuminated.

including the circuit containing said electrical device, and thereby causing an increased flow of current from the source of W1tnesses:

current contained in saidlcirc uit a signal device for each of the sand block sections,

and electrical-means whereby upon said in- In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS s. STEVENS.

Bum T. ANDERSON, RALPH C. SHAY.

Images