US1307326A

US1307326A - John heuky thomas

Info

Publication number: US1307326A
Authority: US
Publication date: 1919-06-17
Anticipated expiration: 1936-06-17

Description

J. H. THOMAS. BOGIE FOR RAILWAY AND TRAMWAY VEHICLES. APPLICATION men ocr. 21. I918.

- 1 07,326. Patented June 17, 1919.

2 SHEETS-SHEET I :Iu 1;, rant-.112:

INVEN TOR John Henry Thomas A T TOHNE Y5 J. H. .THOMAS.

BOGIE FOR RAILWAY AND TRAMWAY VEHICLES. APPLICATION FILED OCT. 21, 1918.

1,30%326. Patented June 17, 1919.

2 SHEETS-SHEET 2.

2824,25 FIGB. 5 a

1N mv TOR John Henry Thomas ATTURNE Y5 A TFE.

JOHN HENRY THOMAS, 0F MEDINDIE, SOUTH AUSTRALIA, AUSTRALIA.

BOGIE FOR RAILWAY AND TRAMWAY VEHICLES.

rsoasec'.

Application filed October 21, 1918.

To all whom it may concern:

Be it known that I, J OHN HENRY THOMAS, a subject of the King of Great Britain and Ireland, residing at No. 30 Hawkers road, Medindie, State of South Australia, Gommonwealth of Australia, have invented certain new and useful Improvements in Bogies for Railway and Tramway Vehicles, of which the following is a specification.

It is well known that with these bogies as heretofore constructed and connected to the body main frame whether of a lllf'EtIIllCilI',

railway carriage or truck or of a locomotive, that is with a king pin at the center or near the center of a rigid or one piece bogie frame, there is excessive wear of the rails and of the wheel flanges when the bogie is passing around any curve. This is due to the fact that the two axles are maintained at all times in position parallel one to the other and cannot take positions truly radial to the curve, and consequently the wheel flanges cannot take positions truly tangential to the rails, but tend to ride upon the rails to their mutual destruction.

According to my invention the frame of "the bogie is made in two parts each carrying ward from the link and passes through eyes in the two parts of the bogie and serves as the said king pin and the other pin projects upward and passes through a hole in the center ofthe somewhat V shaped beam into a hole in the center of a beam rigidly secured to the frame of the vehicle body. The two pins on the somewhat V shaped beam project downwardlytherefrom one at each end and engage slidable blocks slidable upon inclined horn plates secured upon the opposing faces of the two parts of the bogie frame and governing the before mentioned relative movement of the same.

The sidewise movement of the bogie relatively to the vehicle frame as the bogie enters a curve carries it over relatively to the frame of the vehicle body and therefore relatively to the somewhat V shaped beam, the two depending governor pins and the slid- Specification of Letters Patent.

Patented June 17, 919.

Serial No. 258,982.

able blocks so that when passing around a curve of any radius the two parts of the bogie are moved automatically into such position that the two axles take up positions truly radial tothe rails and consequently the wheel flanges take up positions truly tangential thereto.

The weight of the tramcar or vehicle is supported by the bogie by means of bearing blocks fastened to the underside of the car body frame and slidable upon bed plates upon the bogie, the frame of the bogie being supported by springs suspended between the frame of the bogie and the axle boxes.

In order that my invention may be clearly understood I will describe the same with reference to the accompanying drawings in which only the essential features are shown, details of the design and fastening together of the several parts being left to be filled in according to the make ofcar or vehicle to which the invention is to be applied.

Figure 1 is a plan view partly in sect-ion, showing a bogie constructed according to my invention as running upon a length of straight track, and Fig. 2 is a similar view, but with no section, showing the bogie as running upon a length of curved track. The sectional portion of Fig. 1 shows the top flanges of one of the H beams removed to more clearly show the inclined horn plates 1%. In these two figures I have shown and shaded with vertical lines the bearing blocks 28 secured to the frame of the car body. I have also indicated by dotted lines the position of the side beams of the vehicle body frame and by an arrow the direction of movement of the vehicle.

Fig. 3 is a side view, partly in section, showing the bogie as in Fig. 1 together with portion of the frame of the car body but with the near side channel iron of that frame removed, and showing the bearing blocks "28 in section; the sectional part being upon the line a Z) of Fig. 1 to show more clearly the kin in 5 and connections for o aerating the a p ing the car body frame to the bogie, and the side springs, but the front half of the bogie is removed to show said connection more closely.

According to my invention the frame of the bogie is made in two parts, front and rear, each part having at one end an axle with a pair of wheels, and at the other end an eye, the eyes of the two parts being marked 3 and 4 respectively, in which eyes is fitted a king pin 5 whereby the two parts are held together and about which they may make a relative swinging movement in a horizontal plane. The eyes 3 and a are formed preferably by steel castings fitting one another concentrically and bolted or riveted to the H beams of the bogie frame.

At each side of the king pin 5 are formed two opposing inclined faces, that is to say the rear face 8 of the forward part of the bogie and the forward face 9 of the rear part of the bogie at each side of the king pin are specially shaped or inclined in a horizontal plane being widest apart at the end next to the king pin and closer together at the outer end, and between them they carry slidable blocks 10 arranged in pairs, each pair of blocks forming between them a socket for one of the governor pins 12 which project from the somewhat V shaped beam 11 and being so proportioned and inclined that when the bogie is running upon a straight length of track the governor pins 12 with the blocks 10 are at about the center of the inclined faces 8 and 9. The slidable blocks 10 must be made in parts or pairs so that they may adjust themselves upon the governor pins 12 as they cause the angle between the opposing faces 8 and 9 to vary. This it does however to a very slight extent only.

Preferably the frame of each half of the bogie is constructed of two flanged end plates 1, 1 of cast steel connected together by four

beams

2, 2 of H or of channel section, two below and two above, and the before-mentioned opposing faces are formed by means of blocks 1% either of cast or wrought metal forming as it were horn plates which are securely fastened to the lower of such beams as indicated more particularly in Figs. 1 and 4.

The link 16 with two oppositely projecting pins is positioned so that the pin 5 upon its one end projects downward and serves as the king pin to hold together the two parts of the bogie while the pin 17 upon its front end projects upward and serves as a coupling pin which passes through the somewhat V shaped beam 11 and into a hole in a beam 19 secured to the main frame 18 of the vehicle body and so couples the bogie to the main frame, and in the case of a tramcar driven by motors on the bogie carries the body forward with the bogie or in the case tioned slidable governor blocks 10 and each of which has a collar and pin below the slidable block.

The amount of incline upon the faces 8 and 9 of the horn plates 14: in a tramcar or railway vehicle other than a locomotive depends upon the distance the rear corner of the rear part of the bogie is behind the upwardly projecting pin 17 of the link 16, that is behind the point of attachment of the bogie to the main frame.

In the case of an electric tramcar in which one or both of the axles is fitted with an electric motor, should more strength be re quired to assist the king pin 5 to cause the motors 0n the bogie to push the car, a light turntable may be placed on the pivot point 30 of the rear half of the bogie with concentric rings or other suitable connection.

To assist in returning the two parts of the bogie to central or normal position after displacement in rounding a curve and to assist in maintaining them in central position when running on the straight I provide upon each side a strong spring 20 carried by and projecting from a bracket 21 secured to the side beam of the frame 18 of the vehicle body and adapted to engage by means of a flanged head the slidable blocks 10 of the bogie. These springs 20 are so controlled by a central bolt 23 that when the blocks 10 are in their central or normal position their heads just touch but do not exert any further pressure upon the blocks. hen rounding a curve the spring upon the outside of the curve is compressed by the outward movement of the corresponding slidable block but the spring upon the inside cannot follow its block. The result is that the full power of the outside spring is available to assist in returning the outside block to normal position.

The weight of the vehicle is supported by the bogie by means of flanged bed plates 25 secured to the top of the bogie frame and by bearing blocks 28 secured to the underside of the frame of the car body. The bearing blocks 28 have curved outer ends, and the flanges 26 of the bed plates 25 are curved also but to a slightly greater radius. Between the curved outer ends of the blocks 28 and the flanges 26 of the plates upon the rear part of the bogie provision is made for a slight freedom or sidewise movement, but between the ends of the blocks 28 and the flanges 26 of the plates upon the front-part of the bogie provision is'made for considerable movement, sufficient to permit the bogie to move over sidewise when rounding the sharpest curve on the track before the block contacts with the flange.

' The bogies are always placed beneath the vehicle body with the beam 11 toward the end of the car so that when the bogie is at the front of the car the beam is toward the front and when at the rear it is toward the rear, and the several parts operate correctly when passing around a curve whether the bogie is at the leading or the trailing end of the car, so that the reversing of the direction of the car makes no difference to its operation.

I will now describe the movement of a bogie constructed and attached as above described.

\Vhen running upon a straight road the governor pins 12 are maintained in position at an equal distance from the center of the bogie, and the two axles are parallel to one another as shown more particularly in Fig. 1. I

hen the vehicle enters a curve however the front wheels and axle of the bogie move over with the curve while the front of the body frame of the vehicle carrying with it the governor pins 12 is held by the blocks 28 and the flanges 26 of the beds 25 over toward the outside of the curve. So soon as this movement commences the block 28 of the main frame comes against the flange 26 of the rear bed plate 25 of the bogiewhich then acts as a fulcrum, and the connection to the main frame through the upwardly projecting pin 17 of the link 16 carries the V shaped beam 11 and consequently the two governor pins 12 toward the outer side of the curve. This sidewise movement of the pins 12 through the blocks 10 operates upon the opposing inclined faces 8 and 9 of the frame of the bogie and causes the two parts of such frame to swing somewhat about the king pin 5, the inclined faces of the horn plates upon the outer side of the curve being forced farther apart and those toward the inner side moving closer together. This movement of the two parts of the bogie throws the two axles more or less out of parallel according to the radius of the curve and causes each to take up a position radial to the curve, and the flanges of the wheels to take up positions tangential to the rails so that they move around them freely without destructive wear.

I have shown and described a practical application of my invention, but since there are numerous types of bogie vehicles to which it is applicable it will be evident that to apply it to such vehicles many modifications will be required which however will present no difficulty to a competent workman. In particular for a locomotive consideration of the size and position of the cylinders, the width of ga e and frame, and the height of the frame wi l render SUbSiZZLU' tial modifications necessary.

What I claim as my invention is- 1. A bogie for a railway or tramway vehicle made in two parts, each part carrying one of the axles and the two parts being held together by a vertical king pin passing through an eye in each of the two parts, such king pin being on one end of a link which has onits other end a second vertical pin that engages a beam rigidly secured to the frame of the vehicle body and holds there to a somewhat V-shaped beam upon the ends of which are two governor pins that engage and operate slidable governor blocks positioned and slidable between the opposed inclined faces of horn plates secured to the two parts of the bogie.

2. In a bogie for a railway or tramway vehicle made in two parts each part having at one end an axle with a pair of wheels and at the other end an eye which takes the king pin whereby the two parts are held together; two slidable blocks one on each side of the king pin positioned between oppositely inclined faces or horn plates with connections to the vehicle body so that as the vehicle passes on to a curve the blocks are moved to one side or the other and alter the distance between the oppositely inclined faces or horn plates and so cause the two parts of the bogie to swing somewhat about the king pin throwing the two axles more or less out of parallel according to the radius of the curve and causing them to take positlons radial to the curve.

3. In a bogie for a railway or tramway vehicle made in two parts each part having at one end an axle with a pair of wheels and at the other end an eye and having upon each side of the eye an inclined horn plate; a link having at its one end a downwardly projecting pin passing through the said eyes and holding the two parts together and having at its other end an upwardly projecting pin engaging a beam secured to the frame of the vehicle body; and a somewhat V-shaped beam mounted at its center upon the said upwardly projecting pin and having at each end a downwardly projecting pin engaging and operating slidable blocks slidable upon said inclined horn plates.

4. In a bogie for a railway or tramway vehicle made in two parts each part having at one end an axle with a pair of wheels and at the other endan eye and having upon each side of the eye an inclined horn plate; a link having at its one end a downwardly projecting pin passing through the said eyes and holding the two parts of the bogie together and having at its other end an up- D wardly projecting pin engaging a beam secured to the frame of the vehicle body; a somewhat V-shaped beam mounted at its center upon the said upwardly projecting pin and having at each end a pin engaging and.

5. In a bogie for a railway ortramw ayv vehicle made in two parts each part having at one end an axle with a pair of wheels and at the other end an eye andhaving upon each side of the eye an inclined horn plate; a link having at its one end a down: wardly projecting pin passing through the said eyes and holding the two parts of the bogie together and having at its other end an upwardly projecting pin engaging a beam secured to the frame of the vehicle body; a somewhat V-shaped beam mounted at its center upon the said upwardly projecting pin and having at each end a pin engaging and operating slidable blocks slid.- able uponsaid inclined horn plates; and springs carried by and projecting from brackets secured to the frame of the'vehicle body adapted to engage the said slidable blocks when in normal position or when pushed outward but not when pushed inward.

6. In a bogie for a railway or tramway vehicle made in two parts each part having at one end an axle with a pair of wheels and at the other end an eye and having upon eaehsidv f the eye an inclined horn plate; a link having at its one end a downwardly projecting pin passing through the said eyes and holding the two parts of the bogie to gether and having at its other end an upwardly projecting pin engaging a beam secured to the frame of the vehicle body; a somewhatV-shaped beam mounted at its center upon the said upwardly projecting pin and having at each end a pin engaging and operating slidable blocks made in two parts and slidable upon said inclined horn plates; springs carried by and projecting from brackets secured to the frame of the e e body a apted o eng g he s id slidable blocks when in normal position or when pushed Outward, but not when pushed inward; and bearer blocks secured upon the underside of the frame of the vehicle body resting and slidable upon flanged bed plates secured upon the tops of the two parts of the bogie.

In testimony that I claim the foregoing as my invention I have signed my name in the presence of two subscribing witnesses this nineteenth day of September, 1918.

JOHN HENRY THOMAS.

Witnesses:

ARTHUR Gone Oo rso KATHL MARI CoLmsoN.

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

Washington, D. G.