US729341A - Power appliance. - Google Patents

Description

- UNITED STATES PATENT Patented May 26, 1903.

OFFICE.

POWER APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 729,341, dated May 26, 1903. Application filed February 26, 1903- Serial No. 145,292. (No model.)

To all whom it may concern.-

Be it known that I, LANCELOT B. HOLLIDAY, a citizen of the United States, residing at Maybeury, in the county of McDowell and State of \Vest Virginia, have invented certain new .and useful Improvements in-Power Appliuses; and it consists of the features of construction and combination of parts hereinafter more fully described and claimed.

The object of the invention is to provide a power appliance of the lever pawl-and-ratchet type, which is simple of construction, comparatively inexpensive of production, and which may be readily and quickly operated.

In the accompanying drawings, Figure 1 is a View in side elevation of a power appliance embodying my invention, showing the rackbar extended for use. Fig. 2 is a similar view, the casing and lever appearing in section. Fig. 3 is cross-section on line 3 3 of Fig. 1.

Referring now more particularly to the drawings, the numeral 1 represents a casing closed at one end and opened at the opposite end and provided at its closed end with an eye 2 and at its open end with ears 3. Fitted to slide longitudinally in the casing is'arackbar 4, which is provided upon its opposite side edges with rack-teeth 5 and has a longitudinal slot 6. The outer end of the rackbar is also provided with an eye 7. Passing through the ears 3 is a pivot-bolt 8, on which is fulcrumed a block 9, which occupies the slot 6 in the rack-bar and serves as a guide for said bar in its reciprocating movements. The bolt 8 servesas a fulcrum for an operatinglever 10, which has a slotted opening 11 for passage of the rack-bar, and is provided with a pair of pivoted pawls 12, fulcrumed within said slot and having outwardly-extending handles 13. These pawls en gage the opposite ratchet-teeth 5 and are adaptedwhen the lever 10 is vibrated to alternately become engaged with and disengaged from said teeth, and

thereby communicate motion to the rack-bar to slide the same Within the casing 1. The pawls are normally held in engagement with the rack-teeth by springs 14, each of which consists of a plate secured at one end within the slotted portion of the lever and having its free end curved to bear upon the outer surface of the coacting pawl.

The outward movement of the rack-bar 4 is limited by astop-bolt 15, passing through the walls of the casing and the slot 6, and the inward movement of said rack-bar is limited by a stop-piece 16,fixed to the outer end thereof and which is adapted to engage the outer extremity of the block In operation it will be apparent that when the handles 13 of the pawls are pressed inward the pawls will be disengaged from the teeth 5, allowing the rack-bar 4 to be moved outwardly, whereupon by vibrating the lever 10 the pawls will be alternately engaged with and disengaged from the rack-bar and will force the same inwardly. In practice the power appliance thus constructed may be employed for a variety of purposes, among them for extracting stakes, props, and boiler-tubes and for removing pump-rods and the like from deep wells. In employing it for the latter purpose the leasing 1 is suspended by means of its eye 2from the beam of the well-digger or to some other suitable support, and the pawls are retracted to allow the rackbar to drop down to the .limit of its outward movement, and the eye 7 on said bar then engaged in any suitable manner with the pumprod or part to be extracted. By then vibrating the lever 10 it will be apparent that the pawls will operate upon the rack-bar to force it upwardly or within the casing, and that thereupon the pump-rod will be pulled upon and extracted from the well. At intervals, where the pull is a long one, the eye 7 may be disconnected from the rod when the rack-bar has reached the limit of its inward movement and the bar dropped down to bring it into position to exert a further upward pull, the

connection uniting the eye 7 to the pump-rod being in the meantime secured to some suitable support to hold the rod against downward movement. It will of course be apparent that as the lever 10 is vibrated the block 9 will rock slightly to accommodate for the action of the two pawls and to guide the rackbar in such manner as to maintain the acting pawl in engagement therewith.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of my invention will be readily apparent, it is thought, without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is

In a power appliance of the character described, the combination of a casing, a vibrating lever, having a slot therein, a bolt LANCELOT l3. I-IOLLIDAY.

Witnesses:

R. J. BARKSDALE, K. 13. WEBER.

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