US524074A - Engine cross-head - Google Patents

Description

"-(NoMoaem- A f ApTfSNODGRASS ENGINE CROSJHLMJ.l

Patented Aug. '7, 1894.

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UNITED STATESY ARTHUR T. SN ODGRASS, OF DO'IHEN, ALABAMA ENGINE CROSS-HEAD.

SPECIFICATION forming part of Letters Patent N o. 524,074, dated August '7, 1894.

Application filed April 13, 1894. Serial No. V507,433. (No model.)

T all whom it may concern:

Be it known that I, ARTHUR T. SNoDGRAss, a citizen of the United States, residing at Dothen, in the county of Henry and State of labama, haveinvented a new and useful Engine Cross-Head, of which the following is a specification.

The object of this invention is to produce a more eective and generally desirable lubricator for engine cross-heads,- and this end I attain by forming an oil-chamber in each slide or guide, and so varranging it that the oil will be continually fed to the crosshead as it reciprocates in operation, all of which will be more fully described hereinafter and inally embodied in the claims.

In the accompanying drawings: Figure 1 represents a perspective view of a cross-head slide embodying the essential features of my lnvention; Fig. 2, a plan View thereof, showing the top guide-plates removed; Fig. 3, a

`cross-section taken on the line -x of Fig. 2; Fig. 4, a longitudinal section on the line t y of Fig. 2; Fig. 5, a plan view of one of the guide-grooves; Fig. 6, a detail perspective of the cross-head.

The reference numeral 1 indicates the frame ofthe engine to which I have shown my improvements applied; 2 the piston-rod and 3 the cross-head, to which the rod 2 is rigidly secured as usual. The cross-headV 3 consists of a metallic block provided with the recess 4, across which the stout spindle or rod 5, eX- tends; By this means the pitman 6 is pivotally connected to the cross-head. Formed on the upper face of the cross-head 3, and in vertical alignment with rod 2, is the stud or projection 7, While the under surface of the block is formed with the longitudinal and parallel grooves 8 therein. These grooves 8 are two v in number, and are provided to form the ribs 9, which are also two in number and adapted to fit Within the longitudinal guide-grooves 10, of the frame l. Thus the cross-head is mounted. The grooves 10 are one for each of the ribs 9 and are formed one in each of the longitudinal beams 11, of the frame. These beams 11 may be rigidly secured to or formed integral with the frame, and the grooves are angular in vcross-section, so that they will snugly receive the ribs 9. The beams 1l have longitudinal passages 12 formed theredle thereof. The

in, and these extend from a point near the inner ends thereof entirely through the beams and out at the outer ends of the beams; a cock 13 being provided for the opening of each passage, whereby it may be closed.

Communicating with the passages 12, and

' extending vertically from the grooves 10, are

the openings or auxiliary passages 14, three for each groove, which are arranged one at n each end of each groove and one aty the midopenings 14, which are arranged at the ends of the grooves 10, are provided at their upper ends with the transversely-extending slots l5. These slots eX- tendthe entire width of the grooves 10, and serveto catch and retain the grit which may fall into the grooves, as will be better described hereinafter. Formed in the ends of the lbeams 1l are the vertical passages 16, which are screw threaded and adapted for the reception` of the bolts 17.

The bolts 17 are one for each passage 16, and are provided to hold the upper or guidebeams 18 in place, a sleeve 19 being placed on each bolt, and upon which the beams 18 rest, whereby they are held incapable 0f downward movement, upward movement being rendered impossible by the heads of the bolts. The beamslS are, as will be readily seen, two in number and are adapted to lie above the cross-head and one on each side of the stud 7 of such device. By these means the cross-head is securely held in place and allowed the free and unrestrained reciprocal movement necessary for such devices.

In operation, the passages 12 are filled with a suitable lubricant, valves or cocks 13 having been first closed, and the lubricant allowed to rise so as to just cover the bottom of grooves l0. As the cross-head3 reciprocates it pushes before it the lubricant lying' ahead of its line of movement, thereby causing the lubricant tol rise in front of the cross-head, which operation will be attended by a pressure in passages l2, anda consequent rise of the lubricant through the opening 14 to the rear of the head, onlyT to be raised and forced outy again by the head when it returns, in this Way an eectual lubrication is effected.

By means of the transversely extending Slots 15, the' grit and dust which may fall into the grooves 10 are quickly disposed of, since it IOO will be pushed to either end of the grooves 10 hy means of the reciprocating cross-head, and into the slots 15, from whence it proceeds down passages 111 and into the slots 12. Cocks 13 are provided to draw off the contents of the passages 12 and 14, when it is desired or necessary to clean them. This,however, will be necessary but very seldom in a well-kept engine, probably not more frequently than once in four years.

If so desired, a cap or shield may be placed on each side of the beams 18, to prevent the splashing of oil from the grooves. It is also possible and expedient to arrange an ordinary oil-box upon the beams 18.

Having described my invention, claim isv 1. The combination of a piston-rod, a crosshead connected thereto, a pitman connected to the cross-head, and a iongitudnal'guide for the cross-head, said guide having formed and extending longitudinally therein a passage, and openings or auxiliary passages formed in each end ofthe guide and commiiiiicatin g with the longitudinally extending passage, said passage being adapted for the reception of a lubricant, substantially as described.

2. The combination of a piston-rod, a crosshead connected thereto, a pitman connected to the cross-head, and two parallel guides in which the cross-head recprocates, each of said guides being formed with an interior longiwhat I tudinal passage, and with a second or auxiliary passage at each end of the longitudinal passage andicommunicatin g with the bearing face ot the guide, said passages being adapted for the reception of a lubricant,substantially as described.-

3. The combination of a piston-rod, a crosshead connected thereto, a pitman connected to the cross-head, and a guide for the crosshead, said guide having a longitudinal groove in which the cross'head reciprocates, and an interior passage the ends ot which communicate respectively with the ends of the said groove, said passage being adapted for the reception ot a lubricant, substantially as described.

4. A longitudinal guide provided in its face with a groove and having a longitudinal passage communicating at each end with the coi'- responding end of thc groove, said passage being adapted to contain alubricant, and a crosshead having a rib to tit in said groove in the face of the guide, in combination with a piston-rod, and a pitinan connected to the crosshead, substantially as specified.

1n testimony that I claim the foregoing as my own l have hereto afxed my signature in the presence of two witnesses.

ARTHUR T. SNODGRASS.

XVitnesses:

Jon BAKER, Jr.,

W. J. JENKINS.

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