US1309003A - Planograph co - Google Patents

Description

G. L. WALKER.

ACTUATING DEVICE FOR SWING RAIL SWITCHES.

APPLICATION FILED OCT. 5. I9I7- RENEWED MAY 7. I919.

1 ,309,003. Patented July 8, 1919.

3 SHEETS-SHEET l.

INVNTOR G. L. WALKER.

ACT UATING DEVICEFOR SWING RAIL SWITCHES. APPLICATION FILED OCT. 5, NHL RENEWED MAY 7,1919. 1

1,309,003. Patented July 8, 1919.

INVENTOR wamwmw.

THE coLuMulA PLANODRAPH cm. WASHIN aaaaaa c.

G. L. WALKER.

ACTIIA'IING DEVICE FOR SWING RAIL SWITCHES.

APPLIIIATION FILED OCT. 6. I917. RENEWED MAY 7. 1919.

1 ,309,00 3. Patented July 8, 1919;

3 SHEETSSHEET 3.

E W SJEJIENTOR 2 6 ATTORNEY THE COLUMBIA PMNQGRAPH co.. WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

GEORGE LESLIE WALKER, OF KANSAS CITY, MISSOURI, ASSIGNOR TO THE WALLS FROGLESS SWITCH & MANUFACTURING A. CORPORATION OF COLORADO.

COMPANY, OF KANSAS CITY, MISSOURI,

ACTUATING- DEVICE FOR SWING-RAIL SWITCHES.

Specification of Letters Patent.

Patented July 8, 1919.

Application filed October 6, 1917, Serial No. 195,119. Renewed May 7, 1919. Serial No. 295,452.

To all who-m it may concern:

Be it known that I, Gnoncn L. VVALKER, a citizen of the United States, and a resident of Kansas City, in the county of Jackson and State of Missouri, have invented a certain new and useful Improvement in Actuating Devices for Swing-Rail Switches, of which the following is a full, clear, and exact description.

My invention relates to actuating mechanism for devices which involve in sequence the operations of unlocking, swinging and locking again in the new position. It is particularly adapted for use in connection with railway switches of the swing-rail type (as opposed to the frog type) and it is in that embodiment that I have chosen to illustrate it. The principal object of my invention is the provision of a mechanism of the character described adapted to be normally operated by power, of either rotary or reciprocatory type as preferred, and which shall, nevertheless, be capable of being worked by hand if for any reason the power actuating mechanism shall failand this without the necessity of skilled attention to disconnect or remove any parts. Further and more particular objects and advantages of my invention will later appear from this specification.

In the three sheets of drawings accompanying this application and forming a part hereof Figure 1 is a perspective view of the actuating mechanism, both power and hand operated, which is employed in my device;

Fig. 2 is a perspective view of the main guide casting Y, and some of its associated p Fig. 3 is a perspective of a movable member X which fits in'the main casting shown in Fig. 2 and serves to control the operations of retracting the locks, swinging the rail. and relocking the parts;

Fig. 4 is a perspective view of the motor, its controlling means and the means which transmit motion to the member shown in Fig. 3;

Fig. 5 is a perspective view of a swingrail railway switch with my invention applied thereto;

Fig. 6 is a detail in perspective showing the rail locking mechanism and the actuating means therefor;

Fig. 7 is a central, transverse, vertical section of the swinging rail section T, the central lock actuating mechanism being omitted, the rail proper being shown in end plevation, and the base plate 65 in dotted mes;

Fig. 8 is a partial bottom plan view of the parts shown in Fig. 7, the base plate being omitted; and Fig. 9 is a side view of thepart shown 1n Fig. 3 assembled with relation to its actuating parts of Fig. 4, the split nut appearlng in opened position.

It will be understood that in the application of my invention, the parts shown in Fig. 1 are mounted in a pit or cellar at the side of the track, from whence the connecting rod-s 3 1, 35, and lead to the parts they are to actuate. Thisarrangement is particularly advantageous in that such a pit may be closed and sealed, thus protecting the parts from being tampered with and also necessitating that, if the power actuating means shall fail for any cause and it becomes necessary to operate the railway switch by hand a seal must first be broken and the trainman who breaks such a seal may be required to report. There will thus be made at once a record of any part of the electrically operated system which is out of order.

In describing my invention I will first refer to Fig. 5 where are shown the parts to be operated upon. In a swing-rail switch there is employed a short rail section T, pivoted at its center above a base plate 65 into line with either the main line rail M or the switch rail S and locked securely tions. In the preferred form illustrated in the drawings the section T is composed of a length of ordinary rail 58 inclosed between a pair of cast plates 53 which are bolted to the rail section. These plates 53 do not meet below the rail but leave a space therebetween (clearly shown in Figs. 6, 7, and 8) and within this space there work the locking arms 51 which end in forked, upwardly bent, cross heads carrying locking pins 52. These cross heads are inclosed in housings H molded as swells on thecastings 53 and the pins 52 are adapted to enter sockets provided therefor in castings 59 and 60 which and adapted to be swung in either of these posiare bolted to the rails M and S as illusone such socket and I prefer to provide only one in the casting 59, this single hole hemg adapted to receive one pin in either locking position. It will thusbe clearthat the actuating mechanism to be provided. must account for a motion of unlocking, then a motion of swinging the rail, and finally a motion of locking-each being complete before the next one can start.

Referring now to theactuating mechanism proper, as shown detached in Figs. 2, 3 and 4, it will be seen that the reciprocatlng member X carries an upwardly projecting boss 1 and is formed with a top cam groove having longitudinal portions 2, 3 joined by inclined portions and a short longitudinal portion. This casting is provided on its sides with guides 4 adapted to run in guide ways 32 in the main casting Y and has a central, lower cut out portion 5 and a reduced section 6 for purposes later to be described. A bore 7 traversing the length of this casting accommodates the rotating power shaft which aetuates the device. This reciprocating member X also carries a pair of parallel, laterally projecting arms 8 within which is journaled a pin 9 and it has in its upper surface a pin hole 10.

The parts shown in Fig. 3 are assembled with relation to those shown in Fig. 4 so that the electric switch operating arm 11 is received in the pin hole 10, the yoke 13 of the cage is in front of the movable casting, (see Fig. 9) the cage arms 15- are below the guides 4 its wings 16 project up beside the reduced portion 6, the nut 17 is in its out out portion 5 and the shaft 18 passes through the bore 7 This shaft 18 has a threaded central portion as shown and is mounted in a thrust bearing 19 and a standard 20 against which a collar 49 on the shaft bears to take up longitudinal thrust.

The shaft 18 is connected at 21 to the shaft of a motor 26, which motor is controlled by a reversing electric switch 22 of which 23 is the actuating arm. This arm 23 is in the path of a pair of actuating lugs 24 adjustably mounted by means of set screws 25 on the operating arm 11.

In Fig. 2 there is shown the main casting Y which is adapted to be mounted, together with the motor 26 and the shaft bearings 19 and 20, on a foundation 66. the main casting being secured to the foundation by nuts 33 on bolts which pass through bolt holes 33. This casting Y carries a vertical arm L in which there is journaled a hollow shaft K which carries rigidly attached thereto a rocking lever 28 and a double armed actuating lever 31. \Vithin this hollow shaft there is mounted a solid shaft on which are rigidly mounted the rocking lever 29 and another double armed lever 30. The free end of the lever 28 carries an anti-friction roller 27 and the free end of 29 is formedintotwo boss.

engaging lugs E and F, separated by a notch 29 At its opposite ends the lever 31 is connected to the ends of a pair of rods 34, while the lever 30 is connected to a similar pair of rods 35 by means ofadjustable boxes 36 slidably mounted within 30 and adjusted therein by means of the screw threaded shafts 37 which are threaded into the boxes 36 and which may be turned to adjust the same by a wrench applied to their squared ends 38.

On a standard consisting of legs 46, 47 and 48, bolted to and rising from the main casting Y there are pivoted at 39 a pair of levers 39, 40, the lever 39 being of a bent shape as shown and connected by a link 12 with an car 14 on the yoke 13. A spring 40 tends always to hold the lever 39 away from the lever 40 but permits it to be swung toward said lever 40 when both are grasped with a pinching grip. At its lower end the lever 40 is connected to the reciprocating casting X by means of the pin 9 in the lateral arms 8. A T-shaped lever 41 is pivoted on a lateral arm 42 which projects from the main casting Y, a bolt 43 serving the double purpose of securing the standard 47 and journaling this lever 41. The shank of 41 is notched at 44 (see Fig. 2) to straddle the pin 9 and to extend between the plates 8 and the arms of the lever 41 are connected to a pair of rods 45 which serve to actuate the railway switch points and railway switch position indicator, neither of which is shown as they are of the usual type and form no part of my invention.

The connections of the pairs of rods 34 and 35 to the parts which they control also comprise an outer hollow shaft and a solid shaft within this hollow shaft; but the rods 34 which are connected in Fig. 2 to the lever on the hollow shaft are here connected to one on the solid shaft and vice versa for the rods 35. Referring to Figs. 6 and 7 it will be seen that the side plates 53 are provided adjacent their middle points with downwardly projectin slightly less than semicylindrical projections 54 which constitute a hollow shaft on the lower end of which is mounted the double ended lever 55 to the extremities of which the rods 35- are connected. A similar double end lever 56, mounted on the lower end of a solid shaft 57 which passes through the hollow shaft 54, is provided for the rods 34. At the upper end of the shaft 57 there is a disk shaped he'ad 50 to points on which are pinned the locking arms 51 previously mentioned.

In Fig. 5 I have shown a housing 61 around the rail locking and actuating parts just described which serves to protect these parts from moisture or clogging with earth and tubing or the like 62, 63 may be connected with this housing for surrounding and protecting the rods 34, 351

Depending on the angle made by the railway switch with the main line and on other variable factors, it becomes necessary to provide means for adjusting the throw of of the electric switch 22, the-control switch in the towerand the wirin there between is such that when the electric switch22 has been operated to cut off the current to the motor (by the movement of the operating parts to one -or the other extreme position) the throwing of the control switch in the signal tower to the opposite position will serve to energize "the motor again and in the reverse direction.

7 7 Operation.

When the motor 26 is energized, as by 1 throwing the proper control switch in the signal tower, it will rotatev the threaded.

shaft 18. The position of the split nut 17 for normal power operating of the device being closed as indicated in Fig. 4, the rotation of the shaft 18 will serve to move the nut in a direction depending on the direction of rotation of the shaft. Since the nut 17 fills all the space between the ends of the recess 5in the movable casting X it will carry said movable I casting Iwith' it..

Suppose, for purposes of description, that the movable casting of Fig. 3 had been at the left hand end of its travel in the stationary casting Y. In this position the antifriction roller 27 stands substantially at the point in its cam groove marked A and the boss 1 is beside the lug F of the lever 29-and therefore in inoperative position. As the movable casting passes to the right the roller 27 traverses the inclined portion of the groove A to B, turns the lever 28, the hollow shaft K, the double ended lever 31, and works the rods 34 so that one pulls and the other pushes. These .rods swing the lever 56, turn the shaft 57 and rotate the head 50 in a clockwise direction, thus retracting the cross heads and the locking pins 52 carried thereby. WVhen this movement is complete and the rail is free the roller 27 has passed the point B and is in position to traverse the parallel slot from B to C and be inactive. At this time the boss 1 begins to engage the lug F on lever 29, thus turning the solid shaft which is within the hollow shaft K and as a. consequence operating the double ended lever 30 to pull one rod 35 and push the other. These rods swing the double ended lever 55,- and the hollow shaft 54 which is, as previously described, formed as an axial, integral extension of the side plates 53. Thus the rail section Tisswung to its alternate position (as from connecting the switch rail sections S in Fig. 5 to connecting the main rail sections M). After this movement is com pletethe roller 27 passes the point C and,

r in traversing the inclined groove portion from C to D it operates the parts in the reverse'direction to relock the rail section in its new position. After relocking is complete the lug 24 whichis at the left of Fig. 1 has traveled to such a point as to engage the actuating arm 23 of the electric switch 22 and throw it into reverse position where the current will be cut off and the operation ofthe mechanism stopped. It will be clear,

also, that the movements just described will somove the pin 9 as to throw the lever 41 to an extent sufficient, through the rods 45, to move the railway switch points to proper position with reference to the switch setting accomplished and also to throw the switch stand or the like to show the proper switch signal.

If it is found that for some reason the power actuated mechanism refuses to work, the device is at once ready for hand working. If the lever 39 be pushed down against the lever 40-against the action of the spring 40 it will swing on its pivot 39 Through the link 12, the yoke'13 and its connected parts will thus be thrown toward the motor end of the device and independently of the remainder of the mechanism. The wings 16 0f the cage will thus be moved to the left in Fig. 9 from a position with their rear edges at V to the full line position indicated in that figure where the rear edges of these wings stand at W. During this movement the inclined ribs 17 on the inner sides of the wings 16, by traveling in inclined slots in the halves ofthe split nut 17, spread the sections of said nut so that the threads of the shaft 18 are no longer en- .gaged. Now the lever 40 may be operated fact that the electric switch operating rod 11 is actuated during hand operation will insure a proper relative position of electric switch 22 so that power operation may be resumed without adjustment of parts.

It will be obvious that instead of employing pairs of rods 34, 34, 35, 35, and 45, 45 I could have utilized a single rod designed to both pull and push; but I prefer the use of two rods as avoiding tendency to springing out of line which is liable to occur if a light rod is placed under any considerable compression. Also that reciprocatory power could be substituted for the rotary employed by utilizing it as solenoids applied to working the rods 45 for instance, or that compressed air or other sources of power could be substituted for the electrical power illustrated. I do not, therefore, desire to be considered as limited to the precise structure or combinations shown beyond what is indicated in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a device of the character described, a stationary member, a pair of rocking le- 'vers mounted thereon, a reciprocatory member adapted to travel in said stationary member and to engage said rocking levers to actuate the one of said levers first, to permit said first mentioned lever to remain stationary while actuating the second of said levers, and then to return said first mentioned lever to its original position while said second mentioned lever is held stationary, power means for imparting movement to said reciprocatory member, and hand operable means for said reciprocatory member normally traveling free therewith but adapted to be employed to operate the parts independently of said power means.

In a device of the character described, a stationary member and a pair of rocking levers mounted thereon, a reciprocatory member adapted to travel in said stationary member and to engage said rocking levers to actuate the one of said levers first, to permit said first mentioned lever to remain stationary while actuating the second of said levers, and then to return said first mentioned lever to its original position while the second mentioned lever is held stationary, power means for imparting movement to said reciprocatory member, hand operable means for said reciprocatory member normally traveling free therewith, and means for disconnecting the power operating means.

3. In a device of the character described, a stationary member, a pair of rocking levers mounted thereon, a reciprocatory member adapted to travel in said stationary member and to engage said rocking levers to actuate the one of said levers first, to permit said first mentioned lever to remain stationary while actuating the second of said levers, and then to return said first mentioned lever to its original position while said second mentioned lever is held stationary, hand operable meansfor said reciprocatory mem ber normally traveling free therewith, power means for imparting movement to said reciprocatory member including a threaded shaft and a split actuating nut thereon, and.

means for separating the halves of said nut to free the shaft. 7

4. In a device of the character described, a reciprocatory member to actuate the Working parts, a hand lever connected to said member adapted to travel therewith or to actuate the same, a driven threaded shaft, a split nut on said shaft, said nut having in clined grooves in its halves, a cage surrounding said nut and provided with the plurality of inclined rib-s adapted to cooperate with said inclined grooves, said cage also surrounding said reciprocatory member and being adapted to normally travel therewith, a link connected to said cage, a lever connected with said link, and a spring normally holding said last mentioned lever in suchposition that the halves of said nut are in juxtaposition but permitting said lever to be thrown, whereby said cage may be moved independently of the remaining portions of the device to separate the halves of said nut and free said shaft.

5. In a device of the character described, a reciprocatory member adapted to actuate the working parts, a hand lever connected to said member and adapted to travel freely therewith or to actuate the same, a driven threaded shaft, a split nut on said shaft, said nut having inclined grooves in its halves, a cage surrounding said nut and provided with a plurality of inclined ribs adapted to cooperate with said inclined grooves, said cage also surrounding said reciprocatory member and being adapted to normally travel therewith, and means for imparting travel to said cage independently of the remaining portions of the device whereby the halves of said nut may be separated to free said shaft.

6. The combination with a railway switch member, of a reciprocable member for actuating the same, an'operating lever pivotally connected to said reciprocable member for manually operating the switch member, power operable means, means including a split nut for operatively connecting said reciprocable member and power operable means, and means for operating said split nut todisconnect the power operable means, when the latter fails, and thereby to permit the operation of said operating lever.

7 In a device of the character described, a railway switch, a double ended switch throwing lever, a pair of boxes slidably mounted in the arms of said lever, meansfor adjusting the distance of said boxes from the aXis of said lever, and a switch throwing rod connected to each box.

8. In a device of the character described, a reciprocatory member adapted to actuate the working parts of the device, a motor, a threaded shaft driven thereby, a nut on said threaded shaft, said nut being received in a recess in said; reciprocatory member, an elec trio switch operating rod connected to and movable with said reciprocatory member, a reversing electric switch for said motor, and a plurahty of stops on said switch actuating rod adapted to throw said electric switch and reverse the motor connections at each limit of travel of the reciprocatory memher.

9. In a device of the character described,

a reciprocatory member adapted to actuate the working parts of the device, a. motor, a threaded shaft driven thereby, a nut on said threaded shaft, said nut being received in a recess in said reciprocatory member, an electric switch operating rod connected to and movable with said reciprocatory member, a reversing electric switch [for said motor and a plurality of adjustable stops on said switch actuating rod adapted to throw said electric switch and reverse the motor connections at each limit of travel of the reciprocatory member.

10. A. railway track switch operating mechanism comprising an actuating member adapted to be connected to a railway switch element, power means for operating said actuating member to throw the railway switch into either of two positions, and hand operable means for disconnecting said power means, when the same fails, and for manually operating said member.

11. In a device of the character described, a stationary member, a hollow shaft journaled in said member, a rocking lever connected to said shaft, an actuating lever alsoconnected to said hollow shaft, a solid shaft within said hollow shaft, a rocking lever on said solid shaft, an actuating lever on said solid shaft, a second hollow shaft, a-

member to be swung mounted on said hollow shaft, an actuating lever on said second hollow shaft, a second solid shaft within said second hollow shaft, an actuating lever on said second solid shaft, locking means adapted to be actuated by said second solid shaft, a connecting rod between the actuatin lever on said first mounted hollow sha and the actuating lever on said second solid shaft, and a connecting rod between the actuating lever on said first solid shaft and the actuating lever on said second hollow shaft.

12. In a device of the character described,

a stationary member, three rocking levers mounted thereon, a reciprocatory member adapted to travel in said stationary memher, a pin connection between said reciprocatory member and one of said rocking levers, a roller and cam connection between said reciprocatory member and another of said rocking levers, and a lug and boss connection between said reciprocatory member and the third of said levers, whereby the first mentioned lever is actuated whenever said reciprocatory member is moved, the second of said rocking levers has a preliminary movement, a stationary period, and a movement of return to original position, and the third of said levers is being rocked during the intermediate stationary period of Said second mentioned lever.

18. In combination with a swinging member and means for locking said member in two different positions, a motor, a screw shaft driven thereby, a split nut having an inclined groove in each side of each section and adapted to engage the threads of said shaft when in closed position, a cage inclosing said nut and having inclined ribs cooperating with said grooves, a reciprocatory member having a recess adapted to receive said nut, a boss, and a cam groove in its upper surface, a stationary member in which said reciprocatory member is mounted, a lever mounted on said base and having a plurality of lugs in the path of said boss, a lever mounted on said base'and having a roller traveling in said cam groove, connections from saidfirst mentioned lever to said swinging member to throw the same, connections from said second mentioned lever to said locking meansra pair of hand levers mounted adjacent said stationary member, a connection from one of said levers to said reciprocatory member, and a connection from the other of said levers to said cage whereby the cage may be moved independently to the remaining portions of the device to open said split nut.

14. A railway track switch operating means comprising an actuating member adapted to be operatively connected to a railway switch element, selectively operable devices for operating said member and a member for operatively disconnecting one of saiddevices before the other is operated.

15. A railway track switch operating means comprising an actuating member adapted to be operatively connected to a railway switch element, means for moving said member, said means including power operable means and manually operable means, said power and manually operable means being selectively operable, and means for operatlvely disconnecting said power means before the operation of said manually operable means.

16. A railway switch comprising the combination with a switch member associated with a railway track, of an actuating means. therefor, power operable means'for operating said actuating means, a lever for manually operating said actuating means, comprising another lever associated with the first-mentioned lever for disconnecting the power operable means, when the latter fails, to permit the manual operation of the switch independently of the power operable means. 7 V

17. A railway track switch operating means comprising the combination of a reciprocable actuating member, power operable reciprocating means and manually operable reciprocating means, the said reciprocating means being selectively operable to move said actuating member, and means for operatively disconnecting the power operable means when said actuating member is to be manually operated.

18. The combination with a swing-rail switch member, of means for swinging the same comprising a reversible power operable actuating means, means whereby the switch member may be actuated independently of said power means in case the latter is inoperable and a lever for operatively disconnecting the power operable means when the actuating means is to be operated independently thereof.

19. The combination with a swing-rail switch member, means for normally retaining the same in a given position, means for releasing said rail and swinging it about an axis intermediate its ends into another position, power means for actuating said last mentioned means, and manually operable means comprising pivoted levers whereby said last mentioned means may be actuated independently of the power means when said power means fails.

20. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot, means for locking said rail section in its operative positions comprising locking members movable with and in opposite directions longitudinally of said rail section, and means for operating such locking means and such swinging means.

21. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot, locking members movable with said rail section and arranged to be projected beyond the opposite ends of said rail section to lock said section, means for projecting and retracting said locking members, and means for operating such swinging means.

22. In a swing-rail switch, in combination, a base plate arranged to have the ends of main and switch rails secured thereto, a rail sectionpivoted intermediate its ends on said base plate, means for swinging said rail section on its pivot, locking members movable with said rail section and also movable longitudinally of said rail section and adapted to be projected beyond the opposite ends thereof to engage the ends of said main rails or-switch rails to lock said rail section in operative position, and means for operating such locking members and for operating such swinging means.

23. In a swing-rail switch mechanism, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot, means for locking said rail section in its operative positions, comprising a rockable operating member pivoted in the pivotal aXis of said rail section and means for operating such swinging means and locking means comprising power operable means and manually operable means.

24. In a swing-rail switch mechanism, in combination, a rail section pivoted inter mediate its ends, means for swinging said rail section on its pivot, means for locking said rail section in its operative positions, and means for operating such swinging means and locking means comprising power operable means, controlling means therefor, manually operable means for manually operating said locking means and swinging means when said power operable means fails to operate, and means whereby the operation of said manual means also operates said controlling means.

25. In a swing-rail switch mechanism, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot comprising a lever operatively connected to said rail section, means for locking said rail section in its 0perative position, means for actuating such locking means comprising a lever operatively connected thereto and pivoted in the pivotal axis of said rail section, and means for operating said levers to first unlock the rail section, then to swing it and thereafter to lock it.

26. In a swing-rail switch mechanism, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot comprising a lever rigidly connected to said rail section, a second lever mounted at a distance from said first lever, and means for operatively connecting said levers, locking members for locking said rail section in its operative positions, a third lever operatively connected to said locking members, a fourth lever associated with said second lever, means for operatively connecting said third and fourth levers, and operating means arranged to first operate said fourth lever to unlock said rail section, then to operate said second lever to swing said rail section, and thereafter to again operate said fourth lever to lock said rail section.

27. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot, means for locking said rail section in its operative positions comprising locking members associated with said rail section and having parts adapted to project beyond theopposite ends of said rail section and to engage in sockets adjacent the ends of the. main rails or switch rails with which said rail section cooperates, and means for operating such locln'ng means.

28. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for locking said rail section in either of its operative positions comprising locking members movable with said rail section and having parts arranged to engage in sockets adjacent the ends of the main rails or switch rails with which said rail section cooperates, and means for operating said locking members comprising means rockable about the pivotal axis of said rail section.

29. In a swing rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot, locking members movable with said rail section and adapted to be projected beyond the opposite ends of said rail section to lock the same in its operative positions, means for actuating switch points and switch position indicating means, and means for operating such actuating means, such rail swinging means and said locking members.

30. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot comprising a double ended lever, and rods connected to the arms of said lever, locking members movable with said rail section and adapted to be projected beyond the ends thereof to lock said rail section inv swing the rail section, and then to again operate said locking members to lock the rail section.

31. In a swing-rail switch, in combination, a rail section pivoted intermediate its ends, means for swinging said rail section on its pivot comprising a hollow shaft depending therefrom, and actuating means connected to said hollow shaft, means for locking said rail section in its operative positions comprising locking members movable with said rail section, a second shaft within said hollow shaft operatively connected to said locking members, means for actuating said second shaft to project and withdraw said locking members into and out of locking position, and means for operating such actuating means to operate said locking members and to swing said rail section.

In testimony whereof I have hereunto affixed my signature.

GEORGE LESLIE WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. 0.

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