US1859709A - Brake cooling means - Google Patents

Description

May 24, 1932- w. D. MCINTYRE ET AL 1,859,709

BRAKE COOLING MEANS Filed June 11, 1931 2 Sheets-Sheet l W J). M K7306 J5 01764 5 gw wdm A llorncy M y 1932- w. D. MCINTYRE ET AL 1,859,709

BRAKE COOLING MEANS Filed June 11, 1931 2 Sheets-Sheet 2 v I-Illllllll l LIT;

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Inventors A Home y Patented May 24, 1932 UNITED STATES WILLIAM D. MCINTYRE AND JOSEPH DANCIGER, OF AMARILLO, TEXAS BRAKE COOLING MEANS Application filed June 11, 1931.

' particularly the apparatus employed in drilling Wells.

As a general rule, the bull wheel is a huge wooden or wooden faced wheel which is associated with a cable drum employed for lowering and drawing equipment and tools into and out of wells. It is customary to associate with this bull wheel a brake band and operating means therefor so that the rate of speed of the unreeling and reeling of the cable may be regulated to some extent, or stopped when desired.

The application of the brake band however around the periphery of the wheel develops considerable friction, setting the wheel afire, or damaging it by charred burns. Va-

ious make-shift means have been employed for attempting to cool or lubricate the wheel to some extent by applying oil or water to the wheel, but due to the rapid rotation of the wheel, these cooling agents are thrown off in a centrifugal manner, and thereby are not effective.

The purpose ofthe present invention is to build into the wheel construction and hub, means for circulating oil or some other cooling medium radially and by centrifugal force or from the hub to the preiphery where said medium is applied to the braking surface with a View toward minimizing fire hazards.

The particular arrangement which weemploy will become more apparent from the following description and drawings.

In the drawings: 7

Figure 1 is an elevational view showing the invention incorporated in a bull wheel.

Figure 2 is a View at right angles with a portion of the frame broken away and shown in section. i

Figure 3 is a detail view through the felly or periphery of the wheel,

Serial No. 543,686.

Figure 4: is a fragmentary detail sectional and V elevational view showing the cooling medium reservoir.

In the drawings, in'Figure 2 for example, the numeral 5 designates a base and 6 a supporting frame for the drum or Windlass in general. The Windlass includes the customary rotary axle or shaft 7 the wooden bull wheel 8 and the brake band 9. The brake band has its movable end portion 10 attached to a rocker lever '11 mounted on the base 5 for applying and releasing the brakes;

In accordance with my invention, the extended end portion or hub 12 is hollowed out to provide a chamber 13 which functions as a reservoir for containing the cooling medium 14. The numeral 15 designates the stuffing box with which the right angular feed pipe 16 is connected. .On the intake end of this pipe is a funnel 17. The rim or periphery 18 of the wheel is formed with circmnferentially spaced socket 19 with which delivery pipes 20 are connected. These delivery pipes are in turn connected with the reservoir 13 and are designed to conduct the cooling medium it from the reservoir into the pockets or sockets 19 by centrifugal action.

It is thus evident that the reservoir is filled by way of the feed pipe 16 and any suitable cooling medium such as water or oil may be employed for the purpose. As the bull wheel is rotated, this cooling medium 14. is delivered by way of the multiplicity of pipes 2 1 to the pockets 19 where it merges and accumulates between the periphery of the wheel rim and theinner surface of the brake band 9.

This action is sufficient, it is believed, to provide the desired cooling action tomaintain efficient braking power and at the same time to minimize destruction by the development of undue friction and resultant burning of the wood surface. 7

The gist of the idea, is in providing either the hub or the shaft with a reservoir, provid ing suitable. means for supplying a cooling medium, and delivery pipes or equivalent elements for conveying the cooling medium to the periphery of the wheel to reduce fire hazards when the braking action is extreme as the result of forcible tightening of the brake band around the bull wheel.

It is thought that the description, taken in connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes in shape, size, materials, and rearrangement of parts coming within the field of invention claimed may be resorted to in actual practice if de sired.

We claim:

In a structure of the class described, in 'combination, a base, a bearing equipped frame mounted on said base, a shaft journalled for rotation in the adjacent bearing, said shaft being provided with a hollow portion constituting an oil containing reservoir, a stufling boX associated with said reservoir, an oil feed pipe connected with said stufling box and in communication with said reservoir, a bull wheel mounted on said shaft, the periphery thereof being provided with circumferentially spaced pockets, delivery pipes connected with the reservoir and pockets, and a brake band embracing said bull wheel and mounted on said base. 7

In testimony whereof we aflix our signa tures.

WILLIAM D. MOINTYRE. JOSEPH DANCIGER.

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