US767877A - Crank disk and pin for steam-engines. - Google Patents

Description

N0 MOD N o. 767,877. PATENTED AUG. 16, 1904.

' Wk Rn EMING. I CRANK DISK AND PIN FOR STEAM ENGINES.

I I ABPLIGAT'IOH FILED SEPTQIB, 1903.

UNITED STATES PatentedAugust 16, 1904.

PATENT OFFICE.

WILLIAM R. FLEMING, OF HARRISBURG, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 767,877, ated August 16, 1904.

Application filed September 19, 1903. Serial No. 173,82. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM R. FLEMING. of Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Crank Disks and Pins for Steam-Engines; and I do hereby declarethe following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in crank disks and pins for steam-engines, the same being particularly designed for use in connection with the sidecrank style of engine.

The invention has for its object the production of a crank disk and pin made of one integral piece of metal. A further object is to so construct the parts as to secure a maximum strength attheir point of union. A further object is to provide simple and efficient means whereby the crank and its disk may receive effective lubrication.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front face View illustrating my improved crank disk and pin. Fig. 2 is a rear view. Fig. 3 is an edge View. Fig. 4 is a section on line 4 4, Fig. 1.

Referring to the drawings, 10 designates the disk, having a central opening 11 to receive the engine-shaft 12, which is keyed thereto in any preferred manner, strengthening webs or collars 13 14 being formed on each face of the disk adjacent said opening 11. The crank-pin 15 is made integral with the disk 10 and provided with the usual flange 16, as shown. Leading in from the rear face of disk 10 and centrally located with relation to the pin 15 is a bore 17, preferably formed by using a core in casting. Said bore or chamber extends longitudinally through a portion of said pin, the open end thereof being closed by a threaded plug 18, whereby a chamber or reservoir is formed, as shown. In the inner face of disk 10 is formed a groove 19, eccentrically arranged with the opening 11, and communication between the same and bore 17 is established by means of a channel 20. A second channel 12 extends transversely of the pin 15, leading from chamber 17 to the circumference of said pin. The disk 10 is provided with the usual counterweighted portion 22.

In practice my improved crank pin and disk are preferably cast in one integral piece, the bore 17 being obtained by employinga core for the purpose. Ithus secure acrank pin and disk which is far more simple and inexpensive than the forms now in general use, and which at the same time is stronger and more durable. By employing a core in the pin in casting I am enabled to secure a perfect homogeneous casting devoid of blow-holes, particularly at the point where the crank pin joins the disk, the point which receives the greatest strain. By this means I also secure a reservoir for oil whereby sure and automatic lubrication of the crank-pin is secured and the task of securing an oil-channel leading to the surface of the disk is minimized. It will thus be observed that my improved crank disk and pin possesses many advantages, all of which will be apparent to those skilled in the art to which it appertains. By making the disk and crank in one'piece I am enabled to provide a larger pm than is practicable under the present methods of making them of separate parts, this being of particular advantage in short- 7 stroke engines.

I claim as my invention 1. A cast crank-disk having a laterally-extended integral pin, the inner portion of said pin being provided in casting with a central longitudinally cored opening crossing the plane of the adjacent face of said disk, whereby a homogeneous casting is secured at the junction of the pin with said adjacent face of the disk, said opening also forming an oil-reservoir.

2. A cast crank-disk having a laterally-extended integral pin, said-disk being provided in casting with a cored opening extending transversely therethrough from its inner face and continued longitudinally into the inner portion of said pin, whereby a homogeneous casting is secured at the junction of the pin with the adjacent face of the disk,said opening also forming an oil-reservoir.

3. A cast 0 'ank-disk having a laterally-extended integral pin, said disk being provided in casting with a cored opening extending transversely therethrough from its inner face and continued longitudinally into the inner portion of said pin, whereby a homogeneous casting is secured at the junction of the pin with the adjacent face of the disk,said opening also forming an oil-reservoir, and a removable closure working in the disk end of said opening, said disk and pin being provided with channels leading from said opening.

4:. A cast crank-disk having a laterally-extended integral pin, said disk being provided in casting with a transverse cored opening extending longitudinally into the inner portion of said pin, whereby a homogeneous casting is

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