US756751A - Well-brake. - Google Patents

Description

8. J. WALLACE.

WELL BRAKE.

APPLIOATIOH FILED we. 21

PATENTED APR. 5, 1904.

IIII W 73 r If 13 UNITED STATES Patented April 5, 1904.

PATENT QFFICE.

SAMUEL J. IVALLACE, OF GOSHEN, NEW YORK, ASSIGNOR ONE-HALF TO WVALTER F. CRANS, OF CIRCLEVILLE, NEW YORK.

WELL-BRAKE.

SPECIFICATION forming part of Letters Patent N0. 756,751, dated April 5, 1904.

Application filed August 21, 1901. $erial No. 72,817. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL J. WALLACE, a citizen of the United States, residing at Goshen, in the county of Orange, State of New York, have invented certain new and useful Improvements in ell-Brakes; and I do hereby declare the 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 brakes for wellwindlasses; and it has for its object to provide a construction wherein when the brake is in inoperative position a retaining-pawl will be in operative relation to a ratchet-wheel carried by the Windlass-drum, and when the brake is moved to operative position the pawl will be disengaged from the ratchet to permit the drum to rotate and unwind the wellrope therefrom.

A further object of the invention is to provide a construction which will be simple of construction, cheap of manufacture, and efficient in operation.

In the drawings forming a portion of this specification and in which like numerals of reference indicate similar parts in the several views, Figure 1 is an end view of a Windlass, showing the present invention applied thereto. Fig. 2 is a vertical section taken longitudinally through the drum of the Windlass. Fig. 3 is a detail perspective view of the brake-lever detached.

Referring now to the drawings, there is shown a Windlass such as is commonly used at wells and including a drum 5, having a shaft 6, mounted in suitable bearings, the drum 5, which is the winding-drum of the apparatus, having a brake-wheel 7 at one end and directly adjacent to which is the ratchetwheel 8 for holding the drum from rotating to prevent unwinding of the well-rope therefrom. In connection with the brake-wheel there is employed a brake-lever 9, which is provided with a perforation 10, in which is engaged the bolt 11, also engaged with a portion of the frame of the Windlass to form a fulcrum for the lever. At one end of the lever is a handle 12, while at the opposite end thereof and beyond the Windlass-drum from the fulcrum of the lever there is a weight 13, which acts to hold the lever with the handle end thereof normally raised. The lever ispivoted in such position as to pass directly beneath the ratchet-Wheel 8, and on one face of the lever is a flange 14, which projects to lie beneath the brake-wheel and is arcuate in form, so that when the handle end of the lever is depressed this flange, which forms the brake-shoe, will fit against the brake-wheel and by pressing downwardly upon the handle of the lever will be caused to impinge tightly against the brake-wheel to retard or prevent rotation of the winding-drum. It will be noted that the ratchet-wheel is of somewhat greater diameter than the brake-wheel, and to permit of movement of the lever to engage the shoe with the brake-wheel the upper face of the lever proper directly adjacent to the shoe is provided with an arcuate recess, through which the periphery of the ratchetwheel may move. WVhen the lever is rocked against the tendency of the weight, the brakeshoe is applied and the drum may be permitted to rotate at such speed to permit the bucket on the well-rope to descend at the proper rate of speed. WVhen the rope is wound up, however, and, in fact, at all times of its winding means must be provided to prevent accidental unwinding of the rope, and for this purpose the lever is provided with a finger at the point of its fulcrum, and which finger forms a pawl for engagement with the ratchet-wheel, the pawl being of such dimensions that when the lever is rocked by downward movement of the weight the pawl will swing into engagement with the ratchet-wheel, and thus prevent rotation of it and therewith the winding-drum.

It will thus be seen that with this construction when the bucket is to be lowered into the well the handle of the lever is moved downwardly, which act serves to release the ratchetwheel and at the same time to apply the brake to ease the descent of the bucket. Conversely, when the lever is released to release the brake the pawl moves into cooperative relation to the ratchet for action to prevent accidental flange for engagement with the brake-Wheel and a recess to receive the ratchet-wheel, a pawl integral with said lever at a point be- 5 tween said recess and the handle of the lever, and a counterbalance integral with the end of the lever opposite to the handle. 7

In testimony whereof I aflix my signature in presence of two witnesses.

SAMUELJ. WALLACE. Witnesses:

GEORGE J ONES, BENJ. SHAW.

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