US943809A - Railway electric switch. - Google Patents

Description

R. B. BRYANT.

RAILWAY ELECTRIC SWITCH.

-APPLICATION FILED FEB.11, 1908.

Patented Dec. 21, 1909.

2 SHEETSSHEET 1.

WITNESSES) INVENTOR R .15 .BI /aLnt.

IZMY L BY Ma W/LLZZ TTORNEY R. B. BRYANT.

RAILWAY ELECTRIC SWITGH.

APPLICATION FILED IBBJI, 1908.

943,809. Patented Dec. 21, 1909.

2 SHBETS-SHEET 2.

Fig. 6

WlTNESSES: I ROY B. BRYANTJNVENTDR fdwd; WZ Y L v f aaaux fikfw m ATTORNEY ."BRYANT, F NASHVILLE, ARKANSAS.

RAILWAY ELECTRIC SWITCH.

Specification of Letters Patent.

Patented Dec. 21, 1909.

Application filed February 11, 1908. Serial No. 415,454.

close a railway switch, without leaving his car.

The special objects of the invention are to dispense with all relays, circuit changers, and other auxiliary apparatus usually employed in electric a utomatic railway switches of this class.

Without describing the various Scopes of 1 invention, which are attended to in the cl aims, the practical form o l my conception comprises a railway switch, a solenoid plunger for operating said switch, a low resistance solenoid for operating the plunger in one direction; a high resistance solenoid for operating the plunger in the opposite direction; a trolley wheel, contacts or being electrically connected by said wheel; a car motor and motormans electric controller in series circuit between the ground and said trolley wheel; a trolley wire, the low resistance solenoid being connected between said trolley wire and one of said contacts, and the hi h rcsislantn solenoid being; connected be t l the grount'l and the other contact.

Figure l is a mere diagram ol the circuits with a conventional representation of parts of the electrical apparatus included. The contacts which are to be electrically connected by the trolley wheel are represented as relatively displaced, as it only desired, in this figure to indicate in what manner the wheel may act a circuit. closer. Fig. 2 is a vertical section of the railway switch and the solenoid 'and plunger for operating the same. Fig. ll is a side elevation of the trolley pan to indicate the true relative positions of the ccntacts named above. Fig. 4 is across section of Fig. 3 with tie wires added. Figs. 5, Sand 7, are views of a modification.

The swinging railway switch is shown at I. A solenoid core or plunger 2, is con nectcd to said $\\'ll',Cll by a rod 3, and adjust ing nuts l. The plunger 2 is common to two solenoids, the high resistance one 5, wooed with many coils 6, and the .,being wound with 1 contact 10, connected to the fewer coils-8. A protecting casing C is provided for the solenoids.

At the trolley pan are the trolley wire W and contacts 9 and 10 attached to opposite sides of the insulating support 11, which may be steadied by the wires 12. Both contacts 9 and 10 are in the path of the trollay wheel 13, which may therefore act as a circuit closer to the contacts 9 and 10.

The car motor ll and motormans electric controller 15, are represented as connected in series circuit between the ground 16 and the trolley wheel 13.

The coils (5 are in circuit between the ground 17 and the contact 9. The coil 8 is in circuit between the trolley wire NV and the contact 10.

The modus 0])(3IYL7HZ7: is as follows: As the coil 0 should be wound with very small Wire, conveniently, N0. 2:2, to 24-, it has sufficient resistance to obtain the desired current from the line. It operates on about one ampere, in practice, usually. As the coil 8 is of comparatively low resistance, say constructed of No. 12 or 10. it operates on about or amperes. The current that passes through the coil 6, is much limited by the high resistance thereof, while the current that passes through the coil 8, is limited only by the amount of current that the car takes. It is evident therefore that the coil 8 can predominate over the coil 6, if the car is taking sullicicnt current. The strip 19 coming into contact with the trolley wheel first, gives the coil 8, a chance to operate before the coil (3 is energized; so that in case the car motor is taking current, the switch is actually thrown betorc the coil (3 has a chance to interfere. After the switch is thrown, the coil 8 prevents the coil 6 from drawing the plunger 2 back. The action enables the switch to operate on 12 or 15 amperes, or one or two points on the controller 15. If

the strips 9 and 10 were of the same'length,

the coil 8 would simply have to overcome the coil 6, which of course would requiremore current.

Of course, the coil 8 is always energized when the trolley wheel is under the an, but not enough to ellect the switch, un ess the motor is taking current, as it is evident that the coil 8 is but slightly affected by the current that operates the coil 6.

My invention may be modified without departing from thespirit thereof; thus the .-.co,il 8 may be i longer than the contact 9, as indicated in Fig. 3 at 10 Therefore, if the motor 14 is taking current,'the coil 8 will act before the coil 6 is magnetized.

My invention may be modified without departing from the spirit thereof. 1 will set forth how the means for connecting the plunger to the railway switch may be altered for the better, as the working parts are all inclosed water tight, and thus freezing of the parts to ice prevented. In Figs. 5, 6, and 7, the stem 3 of the plunger 2 is connected to a link, which in turn is pivoted ti) a crank arm 20, radiating from an arbor, which arbor carries another crank arm 21, therarbor being numbered 22. Finally the crank \21 is connected to the railway switch 1 by a link 23. By taking oil this link at any time, the

whole mechanism may be removed from the switch 1. p

The casing 0 containing the solenoids 6 and 8', are in a water tight box 28 which is in two divisions, one of which contains the solenoids 6 and 8, and the other the various parts as already numbered 19, 20, 22. The wires for. .the solenoids may be led in through hole 24 to the solenoids, in a water-tight manner. The two divisions named above are. numbered 25 and 26.

Packing 27 around the arbor 22 seals the division 26 from the outside.

- I claim as my invention 1. The combination of a railway switch, electro magnetic means, a first coil of said means for operating the switch in onedirection; a second coil of said means for operating said switch in the opposite direction, the first coil being of few turns, and the second coil being of more turns, and the first coil being in circuit with the car motor, and the second coil being in circuit with the first coil, a trolley wire and a trolley wheel and motormanscontroller for opening and closing 'said circuits between the ground and said trolley wire, and through said coils.

2. The combination ofa railway switch, a trolley wheel, a motormans controller and two coils, whose energizing currents are applied differentially to said solenoids by the action of said controller and trolleywheel,

said coils being in series circuit with each other, and a device for permitting a current to pass through one coil before the other.

3. The combination of a railway switch, a link 23 connected theret0,a solenoid plunger.2, a stem 3 for the plunger, an arbor 22, two cranks 20 and 21 for saidarbor, a

link 19 'joining'said stem 3Ito the crank 20,

and the other crank 21 being connected to the link 23, and a water tight box, having two divisions, oneot' which contains the plunger, and the other, the link l9,'cranl 20, and part hi the stem 22; and solenoids 6 and 8, in the waterti ht bgat tor actuating I said plunger *2.

season 4. In an electric switch, the combination of a magnet for throwing the switch tongue in one direction, a magnet for throwing-the switch tongue in the opposite direction, one

ranged in series with the first named magnet and adapted to develop a stronger field than the first named magnet with the same amount of current, and connections whereby the current through the second named magn'et may be relatively decreased.

6. In an electric switch, the combination of a magnet for throwing the switch tongue in one direction, a magnet tor throwing. the

switch tongue-in. the opposite direction ar-'-" ranged in series with the first named magnet and adapted-to develop a' stronger: field 0 than the first named magnet with the same amount of current, and-a circuit arranged in parallel with the second named magnet whereby the current through the second named magnet may be relatively decreased. 7. The combination-with electrically operated mechanism, of an electric switchhav ing two magnets arranged in series relation with each other, one of the magnets being" adapted to develop .astronger field thanthe other and to be placed in parallel with said mechanism.

8. The combinatioh with electrically operated mechanism, and a circuit controller,

of an electricswitcn having, two magnets arranged in series relation with each other, one of the magnets being adapted to develop a stronger field than the other, and said circuit controller being adapted to place said electrically operated mechanism and said one of the magnetsin parallel.

9.,The combination with electrically operated mechanism having a terminal memvber to receive the power, and a circuit controller having two contact members which said-terminal member is ada'ptedto bridge,

of an electric switch having two magnets tone of which is adapted to develop a stronger field than-the other, said magnets being arranged in serieserelation with-each other and with said two contact members, and the said'one of the two magnet s bcin in parallel with the electrically operate mechanism when the contact members are bridged by the terminal'member and power is delivered to the electrically operated mechanism.

" 10. The combination-with electrically op erated mechanism having a terminal member to receive the power, and'a circuitcon troller having two contact members which said ter- 1,30

- minai member is adapted to bridge,

- electrlo swltch having two magnets one of magnets and a return connection from said in one direction, a magnet having a finer winding for throwing the switch tongue in the opposite direction, and means to reduce which is adapted to develop *a stronger field than the other, a connection from a source of l electric power to the other of the magnets, the current in the-magnet havlng the finer a connection from said other magnet to one winding, relatively to that in the other of the contact members, a connection from magnet. the other contact member to sald one of the R B BRYANT [1h 8.]

Witnesses: I

. T. P. REQUA,

CHAS. E. Hnom.

one of the magnets back tothe source of ower.

11. In an electric switch, the combination of an ofa magnet for throwing the switch tongue

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