US745285A

US745285A - Electric railroad-brake.

Info

Publication number: US745285A
Application number: US15360503A
Authority: US
Inventors: John S Lockwood
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-04-21
Filing date: 1903-04-21
Publication date: 1903-11-24
Anticipated expiration: 1920-11-24

Description

No. 745,285. PATENTED NOV. 24, 1903. J. S. LOGKWOOD.

ELECTRIC RAILROAD BRAKE.

' APPLICATION FILED APR. 21, 1903. N0 MODEL.

-WITNE5EE5: 4 Immmun No. 745,285 PATENTED 'NOV.24 ,1903.5

J. s. LOGKWOOD. ELECTRIC RAILROAD BRAKE.

APPLICATION FILED APR. 21, 1903.

2 SHEETSSHEEVT z. 1

N0 MODEL.

WITNESSES 4o Y of a modified form of my invention in which UNITED STATES Patented November 24, 1903.

JOHN S. LOOKWOOD, OF KANSAS CITY, MISSOURI.

ELECTRIC RAILROAD-BRAKE.

SPECIFICATION forming part of Letters Patent No. 745,285, dated November 24, 1903.

Application filed April 21 1903. Serial No. 153 ,605. (No model.)

To all whom it may concern.-

Be it known that I, JOHN S. LOCKWOOD, a citizen of the United States of'America, residing in Kansas City, in the county of Jackson and State of Missouri, have invented a new and useful Improvement in Electric Railroad-Brakes, of which the following is a specification, reference being had therein to the accompanying drawings, forming a part thereof.

My invention relates to electric railroadbrakes. I

The object of my invention is to provide an electric brake in which the rail and wheel shoes are simultaneously actuated by the same electromagnetic force.

My invention provides, further, an electric brake in which a single helix controls the actuating of the rail and wheel shoes.-

My invention provides, further, a rail-shoe magnetizable by a helix, a magnetizable core movable by said helix, and means by which movement of the core applies the wheel-shoe to the wheel.

My invention provides, further, means by.

which excessive braking pressure of the wheel-shoes on the wheel is prevented.

My invention provides, further, aconstrnction of electric brakes which is powerful in action, simple in construction, and having great strength.

Other novel features are hereinafter fully described and claimed;

In the accompanying drawings, which illustrate my invention, Figure 1 is a View, partly in vertical section and partly in side elevation, of one form of my invention in which a plurality of helices are employed. Fig. 2 is a cross-section taken on the dotted line a b of Fig. 1. Fig. 3 is a side elevation View a single helix is utilized for actuating the brake-shoes. Fig. 4 is a view of another form of my invention shown partly in side elevation and partly in section. In this form of my invention another form of rail-shoesupporting means is shown. Fig. 5 is a horizontal section taken on the dotted line 0 cl of Fig. 4, some of the parts being broken away.

Similar characters of reference indicate similar parts. I

1 indicates the rail; 2, the car-wheels; 3,

ward andffrom the rail 1.

. truck-frame between the car-wheels.

Referring particularly to Figs. 1 and 2, 7 indicates a U-shaped rail-shoe of a magnetizablematerial, the vertical stems 8 of which are movable in the. supportingframe 6 to- Two helices 9 encircle the two stems 8, respectively. Ahelix 1O encircles the horizontal portion of the rail-shoe. The helix 10 is connected in series with the helices 9, and the helices are so wound as to magnetize the stems of the railshoe oppositely. At each end of the rail-shoe is provide'd'a projection 11, from the upper side of which extends a vertical rod '12, verti cally movable in a hole provided in the frame 6. The upper end of each of the rods 12 is screw-threaded and has mounted thereon a nut 13. Encircling each of the rods 12 is a coilspring 14:, the lower end of which rests upon the frame 6 and the upper end bearing against the nut 13. The tension of the springs 14 is such that the rail-shoe will be normally raised above the rail. Any suitable means may be employed for energizing the

helices

9 and 10. The upper ends of the stems 8 are tubular, and in each of said stems is vertically movable a magnetizable core 15. The two cores are connected with each other by a horizontal yoke 16, having its ends pivotally connected to the two cores. In each arm 5 is provided a transverse hole in which is longitudinally movable a bolt 17, screw-threaded at one end and having mounted thereon and bearing against the arms 5 a nut 18. Theother end of the bolt 17 is provided with an eye 19, to which is connected one end of a coil-spring 20, the other end of which is connected to one end of a cord or chain 21, which passes over a pulley 22, supported from the under side of the truck-frame 3"above one of thecores 15, T

and is connected at the other end to the said core. The strength of the spring 20 and the loo of the hole in the stem. This predetermined pressure is such that the wheel-shoes will not be applied with force enough to lock the wheels and cause them to slide. By adjustment of the nuts 18 the tension of springs 20 may be varied. In operating this form of my invention when it is desired to apply the brakes current is applied to the

helices

9 and 10, which will then energize the stems 8 of the rail-shoe 7, thus causing the rail-shoe to be attracted toward the rail against the pressure of the springs 14. At the same time the cores 15 will be drawn downward lengthwise in the helices 9, thus swinging the Wheelshoes 4 against the wheels 2 through the intervention of the chain or rope 21, springs 20, and arms 5. The tension of the springs 20 is such that the cores 15 will strike the bottoms of the holes in the stems 8 before pressure enough is applied to the shoes to cause the wheels to be locked. As soon as the currentis out off the

helices

9 and 10 the springs 14 will raise the rail-shoe from the rail and magnetic suction of the cores 15 will cease.

i In the form of my invention shown in Fig. 3 a single helix 9 is mounted on the frame 6. The shoe (indicated by 23) is provided with two vertical rods 12 and nuts 13 and coil springs 14, as in the form shown in Fig. 1. The single core .15 is mounted as described with reference to the cores in the form shown in Fig. 1. The core 15 is connected to the two chains or ropes 21, which are connected to the brake-arms, as already described.

In the form of my invention shown in Figs. 4 and 5 the rail-shoe is formed similarly to the one 23 shown in Fig. 3. In this form of my invention the brake-shoe 23 has pivotally connected to it at its respective ends the lower ends of two links 24, the upper ends of which are respectively pivoted to the lower endsof two links 25, theupper ends of which are pivotally secured to the frame 6. '26 indicates two springs, the lower, ends of which are respectively secured to the upper end of the links 24, the upper ends of the springs being secured to the frame 6. The tension of the springs 26 is such that the

links

24 and 25 are forced into the position shown in solid lines in Fig. 4, thus normally retaining the rail-shoe 23 above the rail. The core 15, vertically movable in the tubular upper end of the stem 8, has secured to it the lower end of a coil-spring 27, the upper end of which is secured to a transverse bar 28, pivotally secured at its respective ends to the lower ends of two vertical bars 29, the upper ends of which are pivotally connected with the inner ends of two downwardly and outwardly inclined arms 30, the outer ends of which are pivoted, respectively, one to each wheel-shoe 4. The inner ends of the arms 30 are arouate in form and hear one upon the other. The

strength and tension of the spring 27 are such that the core 15 will come to rest before the brake-shoes have been applied to the wheels with sulhcient force to lock the wheels. In operating this form of my invention when the electric current is sent through the helix 9 the shoe 23 will become magnetized and drawn by magnetic attraction against the rail 1, throwing the

links

24 and 25 into the position indicated in dotted lines in Fig. 4. At the same time the core 15 will be drawn downward, thus swinging downward the inner ends of the arms 30, which in turn will force the brake-shoes 4 against the car-wheels 2. As soon-as the current is cutoff from the helix 9 the rail-shoe 23, being demagnetized, will be raised from the rail by the coil-springs 26.

My invention may be variously modified without departing from its spirit.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. In electric brakes of the kind described, the combination with a magnetic rail-shoe, of a helix for magnetizing the rail-shoe, the wheel-shoe, a magnetizable body magnetizahle by and movable toward and from the said helix, and means by which the wheel-shoe is applied to the wheel when the said magnetizable body is properly moved.

2. In electric brakes, the combination with a magnetic rail-shoe, of a helix for magnetizing the railshoe, the wheel-shoe, a body magnetizable by and movable toward and from the said helix, means for normally retaining the rail-shoe clear of the rail when the railshoe is demagnetized, and means by which the wheel-shoe is applied to the wheel when the said magnetizable body is properly moved.

3. In electric brakes, the combination with a magnetic rail-shoe, of a helix for magnetizing the same, the wheel-shoe, means by which the said helix applies the wheel-shoe to the 'wheel, and means by which excessive pressure of the Wheel-shoe on the wheel is prevented.

4. In electric brakes, the combination with a magnetic rail-shoe, of a helix for magnetizing the same, means for clearing the rail-shoe from the rail when the shoe is demagnetized, the wheel-shoe, means by which the wheelshoe is applied to the wheel when the helix is charged, and means for regulating the pressure applied by the wheel-shoe to the Wheel.

5. In electric brakes, the combination with the rail-shoe, of a helix for magnetizing the same, a magnetizable core movable lengthwise in said helix, the wheel-shoe, and means for applying the wheel-shoe to the wheel when the core is magnetized by the helix.

6. In electric brakes, the combination with the rail-shoe, of the helix for magnetizing the same,a magnetizable core movable lengthwise in said helix, the wheelshoe, means for applying the wheel-shoe to the wheel when the core is magnetized, and means for limiting the pressure applied by the wheel-shoe to the wheel.

7. In electric brakes, the combination with the rail-shoe, of a helix for magnetizing the same,a magnetizable core movable lengthwise in said helix, the wheel-shoe, means for applying the wheel-shoe to the wheel when the core is magnetized, and adjustable means for varying the degree of pressure of the wheelshoe.

8. In electric brakes, the combination with therail-shoe movable toward and from the rail, of the helix for magnetizing the railshoe, a magnetizable core movable lengthwise in said helix, the wheel-shoe, means for applying the wheel-shoe to the wheel when the core is magnetized, and adjustable means for varying the degree of pressure of the wheelshoe.

9. In electric brakes, the combination with the rail-shoe provided with a magnetizable stem, of a helix encircling said stem, a magnetizable core adapted to enter said helix when the helix is energized, the wheel-shoe, and means by which movement of the core applies the wheel-shoe to the wheel.

10. In electric brakes, the combination with a magnetizable rail-shoe provided with a magnetizable stem, of a helix encircling said stem, a magnetizable core adapted to be moved lengthwise in said helix, the wheel shoe, means by which the wheel-shoe is applied to the wheel when the core is magnetized by the helix, and means for limiting the degree of pressure of the wheel-shoe on the wheel.

11. In electric brakes, the combination with the magnetizable rail-shoe provided with a magnetizable stem, of a helix encircling the said stem, a magnetizable core movable lengthwise in said helix, the wheel shoe, means by which the wheel-shoe is applied to the wheel when the core is magnetized by the helix, and means for withdrawing the railshoe from the rail when the rail-shoe is demagnetized.

12. In electric brakes, the combination with the magnetizable rail-shoe provided with a magnetizable stem, of a helix encircling said stem, a magnetizable core movable lengthwise in said helix, a wheel-shoe, a spring connected to said wheel-shoe and to said core, and means by which the tension of said spring may be varied.

13. In electric brakes, the combination with a magnetizable rail-shoe movable toward and from the rail, of a spring for withdrawing the rail-shoe from the rail, a helix for magnetizing the rail-shoe, a magnetizable core movable by said helix, a wheel-shoe and means by which the wheel-shoe is applied to the wheel when the said core is magnetized by the helix.

14. In electric-car brakes, the combination with amagnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable body movable toward and from the said helix, a pivotally-mounted wheel-shoe, and means for swinging the said wheel shoe against the wheel when the said magnetizable body is moved toward the said helix.

15. In electric brakes, the combination with a magnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable body movable toward and from the said helix, a pivotally-mounted wheel-shoe, a spring connected therewith and to the said magnetizable body.

16. In electric brakes, the combination with a magnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable core movable lengthwise in said helix, a pivotallymounted wheel-shoe, a spring connected to the wheel-shoe and to the said core.

17. In electric brakes, the combination with a magnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable body movable toward and from the said helix, means for limiting the movement of the said body toward the said helix, a wheel-shoe, and a spring connected to said shoe and to the said magnetizable body.

18. In electric brakes, the combination with a magnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable core movable lengthwise in said helix, means for limiting the movement of the said core into said helix, a wheel-shoe, and a spring connected with said wheel-shoe and the said core.

19. In electric brakes, the combination with a helix,of a magn etizable core movable lengthwise therein, a wheel-shoe movable toward and-from the wheel, a spring and means by which movement of the said core isimparted to the wheel-shoe through said spring.

20. In electric brakes, the combination with a helix,of a magnetizable core movable lengthwise therein, a wheel-shoe movable toward and from the wheel, a spring, means by which movement of the said core is imparted to the wheel-shoe through said spring, and means for varying the tension of said spring.

21. In electric brakes, the combination with a helix, of a magnetizable body movable toward and from the said helix, a wheel-shoe movable toward and from the wheel, a spring, means by which movement of the said magnetizable body is imparted to the wheel-shoe through said spring, and means for limiting the movement of the said magnetizable body toward said helix.

22. In electric brakes, the combination with a helix, of a magnetizable body movable toward and from the said helix, a wheel-shoe movable toward and from the wheel, a spring, means by which movement of the said magnetizable body is imparted to the wheel-shoe through said spring, means for limiting the movement of the said magnetizable body toward said helix, and means for varying the tension of said spring.

23. In electric brakes, the combination with a magnetizable body movable toward and from the said helix, and means for actuating the said wheel-shoes when the said magnetizable body is properlymoved.

24. In electric brakes, the combination with a a magnetizable rail-shoe, of a helix for magnetizing the same, a magnetizable core mov- ICO IIO

able lengthwise in said helix, a plurality of wheel-shoes, and means for actuating the same when the core is properly moved.

25. In electric brakes, the combination with a magnetic rail-shoe, of a helix for magnetizing the same, a magnetizable core movable lengthwisein said helix, a plurality of wheelshoes, and adjustable means for actuating the wheel-shoes when the said core is properly moved.

26. In electric brakes, the combination with a magnetic rail-shoe, of a helix for magnetizing the same, a magnetizable core movable lengthwise in said helix, a plurality of wheelshoes, means by which the wheel-shoes are actuated when the said core is moved inwardly in said helix, the said wheel-shoe-actuating means being provided with means for limiting the pressure applied by said wheelshoes.

27. In electric brakes, the combination with a magnetizable rail-shoe, of a plurality of helices, a magnetizable device actuated by and movable toward and from the said helices, a plurality of wheel-shoes, and means for actuating the said wheel-shoes when the said magnetizable device is magnetized by the said helices.

28. In electric brakes, the combination with a magnetizable rail-shoe, of a plurality of helices for magnetizing the same, a plurality of magnetizable cores movable length wise one in each of said helices, a plurality of wheel-shoes and means for actuating the same, when the said cores are magnetized.

29. In electric brakes, the combination with a magnetizable rail-shoe, of a plurality of helices for magnetizing the same, a plurality of magnetizable cores movable lengthwise one in each of said helices,a plurality of wheel-shoes, adjustable means for actuating the said Wheelshoes when the said magnetizable cores are moved inwardly in said helices, the said adjustable means being provided with means by which excessive pressure of the wheel-shoes is prevented.

30. In electric brakes, the combination with a magnetizable rail-shoe, of two helices for magnetizing the same,two magnetizable cores movable lengthwise one in each of said helices, two wheel-shoes, and two springs connected respectively to the said cores and the said wheel-shoes.

31. In electric brakes, the combination with a magnetizable rail-shoe, of two helices for magnetizing the same, two cores movable lengthwise one in each of said helices, and magnetizable thereby, a magnetizable yoke connecting the two said cores, a plurality of wheel-shoes, andmeans by which the wheelshoes are actuated when the cores are moved in the said helices.

32. In electric brakes, the combination with a magnetizable rail-shoe, provided with two magnetizable stems, of a support in which the said stems are movable toward and from the rail, two helices encircling one each the said "stems,two magnetizable cores movable lengthwise one in each of said helices, a plurality of wheel-shoes and means by which the said wheel-shoes are actuated when the cores are properly moved.

33. In electric brakes, the combination with a magnetizable rail-shoe, ofa plurality of helices for magnetizing the same, two magnetizable cores movable lengthwise in two of said helices, a magnetizable yoke connecting the two said cores, a plurality of wheel-shoes, and means for actuating the same when the cores are properly moved.

34. The combination with a magnetizable rail-shoe, of a plurality of helices for magnetizing the same, two cores movable lengthwise in and magnetizable by two of said helices respectively, a magnetizable yoke connecting the two said cores, a plurality of wheelshoes, and means by which'the wheelshoes are applied to the Wheels with a predetermined degree of force when the cores are properly moved.

In testimony whereof I have signed my name to this specification in presence of two subscribing witnesses.

JOHN S. LOOKWOOD.

Witnesses:

WARREN D. I-IoUsE,

HENRY F. Ross.