US499034A - Driving-gear for locomotives - Google Patents

Description

(N0 Modeli) D. S. PATTERSON. DRIVING GEAR FOR LOCOMOTIVES.

Patented June 6, 1893.

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DAVID S. PATTERSON, OF NORTH PLATTE, NEBRASKA.

DRIVING-GEAR FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 499,034, dated June 6, 1893.

Application filed January 7, 1893.

To all whom it may concern:

Be it known that 1, DAVID S. PATTERSON, a subject of the Queen of Great Britain, at present residing in North Platte, in the county of Lincoln and State of Nebraska, haveinvented a new and Improved Driving-Gear for Locomotive-Engines, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved driving gear for locomotive engines, which is simple and durable in construction, and arranged to prevent horizontal straining of the axle journals, and pounding of the wheels on the rails whether caused by the centrifugal force of a single main connecting rod, a single parallel rod, or a single crank pin, or by the angular thrust of the main connecting rod.

The invention consists of a front and a rear cylinder arranged on opposite sides of the driving wheel, and connected by their pitmen with crank pins located on opposite sides of the center of the driving wheel.

The invention also consists of certain parts and details, and combinations of the same, as will be hereinafter described,and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation of the improvement as applied on a locomotive having double driving wheels. Fig. 2 is a plan view of the same. Fig. 3 is' a like view of the improvement as applied on alocomotive having single driving wheels; and Fig. 4 is an enlarged sectional plan view of the driving wheel on the line 4-4 of Fig. 5; and Fig. 5 is a sectional rear view of the same on the line 5-5 of Fig. 4.

The improved driving gear is provided with the two engine cylinders A and B, provided with the usual pistons and cross heads connected by their pitmen or connecting rods C and D, respectively with wrist pins E and F, respectively, arranged at opposite sides of the center of the driving wheel G, as plainly shown in the drawings. Each of these cylinders will only be about half the usual size.

The wrist pin E is preferably formed at its outer end with a crank arm II, extending di- Serial No. 457,648. (No model.)

ametrically on the face of the drive wheel G and carrying at its outer end the outwardlyextending wrist pin F connected with the other pitman D, as above mentioned. As shown in Figs. 4: and 5, the wrist pin E is formed or secured at its inner end on ablock E preferably made triangular in shape and fitted into a correspondingly shaped aperture formed in the web of the driving wheel G. Set screws I screwing half into the web of the wheel G'and half into the block E, serve to hold the latter in the proper position in the wheel.

In case the locomotive is provided with a second pair of driving wheels J, then the wrist pin E is made sufficiently long to permit a pitman K to engage the said wrist pin in addition to the pitman O, as plainly illustrated in Figs. 1 and 2. This pitman K is connected pith a wrist pinL on the second driving wheel J, and the other wrist pin F of the first drive Wheel G is connected by a pitman N with a wrist pin 0 held on a crank arm P attached to the outer end of the wrist pin L. This double wrist pin 0, L, and crank arm P are similar to the double wrist pin F, E, and crank arm H on the first driving wheel G.

It will be seen that when the motive agent is admitted to the cylinders A and B simultaneously, their pistons travel in opposite directions, so that one of the pitmen C or D pushes rearward on its respective wrist pin while the other pushes forward and vice versa during the lower or upper half of the stroke. By this arrangement all horizontal strain on the journals or the axles of the drive wheels G and J is prevented, and pounding of the drive wheel on the rails is obviated on account of the pressure on the two crank pins E and F, being simultaneously on the upper and lower halves of the stroke, for each revolution of the wheel.

It is understood that the block E may be of any other desired form than triangular, as stated and shown in the drawings.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent' 1. A driving gear for locomotive engines, comprising a front cylinder, a rear cylinder, the cylinders being located on opposite sides of the drive wheel, and wrist pins located on opposite sides of the center of the drive wheel, and connected with the pitmen of the said engine cylinders, substantially as shown and described.

2. In a driving gear for locomotive engines, the combination with a drive wheel having in its web a transverse aperture, of a block secured in the said transverse aperture,awrist pin formed or secured on the said block, a;

crank arm attached to the outer end of the wrist pin and extending diametrically of the drive wheel, a second wrist pin projecting from the free end of the said crank arm, and pitmen connected with the said wrist pins and forming part of the engine cylinders arranged on oppositexsides of the said drive: wheel, substantially as shown and described.

3. .A driving gear for locomotive engines comprising a front cylinder, a rear cylinder, the said cylinders being located on opposite sides of the drive wheels, wrist pins located on opposite sides of the center of each drive Wheel, a crank arm for connecting the two wrist pins of onedrive wheel with each other, cylinder pitlnen connected with the wrist pins of one drive wheel, and parallel pitmen connecting the wrist pins of one drive wheel with the wrist pins of the other drive wheel, substantially as shown and described.

hi DAVID s. x PATTERSON.

mark

Witnesses:

JOHN W. LEMAsrERs, ISAAC A. :SABIN;

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