US281810A - Brake for winding or hoisting engines - Google Patents

Description

W. 0. WATERS.

' BRAKE FOR WINDING 0R HOISTING ENGINES.

(No Model.)

No., 281,810. Patented July'24, 1883.

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- of almost any available wood.

\VILLIAM C. WATERS, OF SAN FRANCISCO, CALIFORNIA.

BRAKE FOR WINDING OR HOISTING ENGINES.

SPECIFICATION forming part of Letters Patent No. 281,810, dated July 24, 1883.

Application filed May 21, 1883. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM 0. warns, of thecity and county of San Francisco, State of California, have invented an Improvement in Brakes for WVinding or Hoisting Engines; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in brakes for hoisting engines; and it consists of certain details of construction which will be .more fully explained by reference to the accompanying drawings, in which- Figure 1 is a side elevation of my brake, showing a section of one shoe and the blocks. Fig. 2 is a view of the back of the brake. Fig. 3 is a transverse section.

A A are caster wrought iron brake-shoes, which are curved to the same are as that of the wheel B, upon which they are intended to act. These shoes have channels or grooves 0 formed in their curved faces to receive the wooden blocks which form the frictional surface. These blocks may be made short and They are cut to fit into the channels, and may be dropped in, the first one resting upon the flange at the bottom of the channel, and the others one above another until the channels are full.

Plates D fit across the upper ends of the channels, and when all the blocks are in place they may be secured by screws, so as to hold the blocks firmly, when they will also be retained, partly by their proximity to the surface of the wheel, but more particularly because they form the inner curve of the shoe and cannot move toward the center without binding more closely.

The shoes A A are suspended upon bars or links E, the lower ends of which rest upon foundation-blocks F, which are united by rods G. The backs of the brake-shoes are flanged I at their edges, so that the single-bar E, which supports each shoe, lies between these flanges, and bolts or shafts H H pass through the upper ends of the bars and through the flanges horizontally at or near their centers, so that the shoes turn freely upon these bolts. Vcrtical bars I are fitted upon the ends of the belts or shafts H, so as to stand outside the edge of the wheel rims and rods J, extending across the sides of the wheel just above and gated horizontally, so that the bolt may have some play back and forth. An arm, K, is

fixed upon this shaft or bolt 11 and projects horizontally outward, and is connected by a rod, L, with the lever M, by which power is applied.

The inner end of the arm K has a toe, n, projecting downward, and when the outer end of the arm is drawn down it brings this toe into contact with the back of the brake-shoe A and presses it against the wheel.

The slot through which the bolt or shaft H passes allows it to move back as the pressure is applied, and the side rods, J, draw the op posite brake-shoe A against the wheel upon that side, thus gripping the wheel firmly be tween them. When the brake is released by lifting the arm K upward, the toe N is thrown back and strikes a lug, 0, which is formed on the back of the brake-shoe A, and thus draws or stands this shoe back, the slot in the shoe allowing the side bars, J, enough motion to permit the opposite shoe to fall away and leave the wheel free from pressure.

Adjustingscrews I? pass through lugs which project from the lower ends of the brake-shoes, and when the brakes fall away from the wheel these screws will strike the suspending links or bars E, which prevents the lower end from swinging back far enough to throw the upper end in and cause it to rub against the wheel. Setscrews S S are placed in such a position that they regulate the distance that the brake falls back.

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

1. In a hoisting-machine brake, the shoes A A, suspended upon the bars E by the pins H H, said pins having the vertical arms I at their outer ends, and the connecting-rods J, uniting them above and below the center of the wheel B, substantially as herein described.

2. I11 a hoisting-machine, the brake-shoes, with their suspending and uniting rods, in combination with the lever K N, mounted upon the pin H, said pin passing through an elongated opening in the brake-shoe, so as to with their suspending and uniting rods, and have an independent movement, substantially the operating-1ever, as shown, in combination as herein described. with the screws P, when said screws pass I 5 3. In a hoisting-machine, the brake-shoes, through the lower ends of the brake-shoes, 5 with their suspending and uniting rods, and substantially as herein described.

the lever K N, mounted upon a pin moving In witness whereof I have hereunto set my loosely in a slotted opening in one of the brakehand.

shoes in combination with a lu projectin ,7

from said shoe, so as to be engaged by the a? I WILLIAM 10 of the lever in its backward movement, sub- \Vitnessesi stantially as herein described. J. B. PITOHFORD,

4. In a hoisting-machine, the brake-shoes C. D. COLE.

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