US893909A - Pumping-jack. - Google Patents

Description

@www JULY 21, 1903.

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clamp which is adapted to be secured around the casing by the bolts c and f. The bolt e also acting to hold together the standards 3- f1 in the position shown in Fig. 6. Said clamps form means for rigidly connecting the frame of the jack at the position desired. The upper ends of the standards 3 and i are secured together by the bolt g, which bolt also connects thereto the forward ends of the braces 5 and 9. I

The numeral 13 denotes the rack-bar, having its rear face provided with cogs, or gearteeth, with its forward edge expanded forming a head to t in the T-shaped slot formed by the union of the L-shaped (in cross'section) standards 3 and 4- as shown in Fig. 6. Near the upper end of the rack-bar is permanently secured a rigid collar having a forwardly extending brace 14, and above which the rack-bar is formed round in cross section to form a pivot.

The numeral 15 designates the connecting arm which is adapted to rotate horizontally 'on the said pivot formed on the upper end oi the rack-bar and to contact with the upper edge of the collar and the brace 14 as shown. The horizontal projecting portion of the connecting arm 15 is forked to receive therein the polish-rod at that pointv as shown. Oppositely disposed screws h. and 7c extend' through the forks of the connecting arm to .provide means for attachinfr the connecting arm to the polish-rod as indicated.

Extending transversely of the face of the rack-bar 13 and formed thereintov aretwo channels which are located some distance apart. These channels do not extend entirely across said face as is indicated in Fig. 6, but there is an abutment left at each side forming bearings. Extending longitudinally through said channels and secured in said abutments are the respective axles a and l), on which is revolubly mounf'ed the respective rollers c and d, the forr being shown in Fig. 2 and the latter in lf 6, said axles and rollers and also the channels therefor are identical with each ether. adapted to conf..:;t with the inner face or base of the bifurcated channel formed by the front standards 3 and 4, as indicated in Fig. 6, the object being to provide roller bearing for the rack-bar, substantially as indicated.

The numeral 16 relates to the hub (Fig. 4) for the segment-gearl?. Said hub is pivoted to rotate between the u per portions of the standards 1 and 2. Radiating out from the periphery of lthe hub are fourpairs of ears, 16, 1Gb, 16", and 16d, in which are secured by bolts onel end eachof the radial arms 18, 19, 20 and 21, respectively.. Extending back from the rear face of the segmental gear 17 are three pairs of ears'17a, 17 b and 17c in which are secured by bolts the forward ends of the res ective arms 18, 19. and 20, respectively. e arm 2.1 projects Said rollers are upward, when the rack bar is raised to its limit approximately, at right-angles to the arm 19, and it is designated as the operatingarm. The upper end of said operating arm should be coupled to the upper end of the segment-gear by the interposed rod or the like designated by the numeral 22. The arms 18, 19 and 20 are of a length such as' to connect the segment gear 17 in operative engagement with the gear of the rack-bar l13, while the braces of said frame eventuate to retain the segment-gear from'lateral displacement in relation thereto.

The numeral 2B designates a rope or cable attached at one end to the upper portion of the arm l21, the other end leading to power by which it is operatable reciprocably.

of course, will cause the segmental-gear 17,

turning on its hub 16, to carry vertically upward therewith. the rack-bar 13, andthe latter in turn will lift the poli sli-rod to its upward limit. These two operations, the upward and the downward strokes of the polish-rod, continuing as long asdesired, thereby accomplishing the predominant object of the invention: the pumping of the well. lt is also notably apparent that my invention is very easily attached in operative position, and when so attached it will of necessity have a maximum of rigidity that the device may be easily' disconnected from the well; that the adjustment of the connection of the olishrod may be easily and quickly change that while being positive and secure the adjustment is quite flexible; and that the entire device may be dissembled 'and packed in a comparatively small space.

Claims v 1. A pumping-jack having a pair of front standards containing a '1T-shaped channel formed longitudinally thereof, a rack-bar having a head longitudinahythereof adapted to operate in said channel and corresponding therewith in cross-section, a segment-gear meshing withthe rack-bar, a hub -for said segment-gear pivoted between the l rear standards of the frame, arms connecting said hub and the segment-gear, an operating arm extending up from said hub, a connecting-- arm mounted on the upper end of the rackbar, means for attaching said connectingarm to a polish-rod, and means for securing 4said frame to a welicasing, all substantially as set forth 2. A pumping-jack characterized by a pair of front standards containing aT-shaped channel formed therebetween and longitudinally thereof, a rack-bar having a head formed longitudinally thereof and operable in and fitting said channel, a segment-gear meshing with the rack-bar, a hub for said segment-gear, a pair of-rear standards between Which said hub ispivoted, arms connecting the hub and the 4segment-gear, braces connecting the front and the rear standardsI an operating-arm extending up from said hub7 a horizontally rotatable connecting-arm mounted on the u per end of the rack-bar, meansfor attaching 't e connecting- 15 arm toa polish-rod7 and means-for securing the frame in position with relation to the In testimony `vsf'her'eof I have hereunto subscribed my y CALVIN' J. ENGLE,l 1

Witnesses: i

P. M. HEARN, l

CHARLES SRODMAN.

g name to this specification in 20 the presence of two witnesses. l

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