US735862A - Clutch for hoisting-machines. - Google Patents

Description

N0 MODEL.

PATENTED AUG. 11, 1903.

P. F. DUNDON,

CLUTCH FOR HOISTING MACHINES.

APPLICATION FILED DEC. 13, 1902.

lf wm w THE NORRIS PETERS c0. FNOTO-UTHQ, WASHINGTON, u.

UNITED STATES Patented August 11, 1903.

PATENT OFFICE.

CLUTCH FOR HOISTING- MACHINES.

SPECIFIGATIONJforming part of Letters Patent No. 735,862, dated. August 11, 1903. I Application filed December 13,1902. Serial No. 135,116. (No modeL To (tZZ whom it, may concern.-

Be it known that I, PATRICK F. DUNDON, a citizen of the United'States,residing at San Francisco, county of San Francisco, and State of California, have invented certain new and usefulImprovements in Clutches forHoisting- Machines; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanyingdrawings,formingapartofthis specification.

My invention relates to an improvement in friction-gearing especially adapted to winding or hoisting machinery.

Myimprovement consists of a strongpivoted lever mounted in the end framing that bears against the movable element of the clutch, this lever operated by a cam, wheelgearing, and a hand-lever, as illustrated in the drawings herewith, that form a part of this specification, also in the combination and arrangement of parts, as hereinafter explained and illustrated by drawings, forming a part of this specification.

The objects of my. invention are to avoid hollow shafts, axial or central devices to move and set such clutches, and to arrange such machines so that they will occupy a minimum space laterally when employed on vessels, pontoons, or derrick-frames. On such vessels the hoisting apparatus is always crowded, and when arranged in the usual manner, with the setting gearing applied centrally through the drum-shaft, the Width of the machine is so unduly increased as to preclude its use in many places. By my improvement I limit the width of the whole apparatus to the Width of the hoisting-drum and clutch proper and also avoid the costly drilling of the main shaft.

Referring to the drawings, Figure I is a partlylongitudinalsection through a clutched winding barrel or drum'and its operatinggearing arranged according to my invention. Fig. II is an end view of the same machine. Fig. III is a view of the opposite side of the main standard that supports the clutch-operating mechanism. Fig. IV is an enlarged view, mainly in section, showing details of the clutch-setting devices.

The main shaft 1 is made solid and passes through the winding-drum 2, the latter adapted for a rope or chain, that is wound between the flanges 3 and 4 in the usual manner. The flange 4 is provided on its outside with a lateral grooved channel around the periphery to receive the friction-ring 5, commonly made of wood and held as shown. This clutch-ring 5, which may be of any suitable material or of any number of pieces joined together, is attached to a strong gear-wheel 7, driven by the usual train of wheels connecting to the motive power. The winding-d rum 2 is loosely mounted and longitudinally movable on the shaft 1, so that when pressed toward the wheel 7 the clutch is engaged and when released is moved back by the springs '8, that hold the clutch out of contact, permitting the drum 2 to be free to revolve in either direction.

The shaft 1 is held in the bearings 12 and 13, the former made integral with the stand-' ard 10, the whole being fastened to a baseframe 14, made of metal or wood, in the usual manner.

T0 engagethe clutch and cause the barrel 2 to revolve in the direction of winding, or to raise a load, it is pressed toward the wheel 7 by means of .a strong lever 9 mounted in the standard 10 pressed downward by a cam 15. The cam 15 is held rigidly on the shaft 17 and is turned by the ge'ar-wheelsl8 and a crank 19, the gear-wheels 18 being made of sizes relatively to the amountof force to be applied to the cam 15 and lever 9. The lever 9 is forked, as shown in Fig. III, to pass partly over the shaft 1 at each side to prevent lateral movement of the lever and keep it in position. This lever 9 bears against a collar 20, made of hardened steel, that in turn presses against the end of the drum 2. In the face of the lever 9 I'place a roller 22, held on a screw 23, that bears in a matrix or curved seat at the back. This roller projects slightly beyond the face of the lever 9, and being free to turn is by this means prevented from wearing into flat faces where it bears on the collar 20.

In operating an attendant movesthe handle l9 backward and forward or throughout a range in proportion to the pressure to be applied, starting, raising, and lowering loads by control of the friction-clutch, the load itself causing the reverse or backward movement of the drum 2 when lowering loads.

IOO

Having thus described thev nature and ob- .jects of my invention, what I claim as new,

ing, a cam, gears, and a crank for operating said lever, also mounted above said shaft- 1; bearing, whereby the Width of the machine is practically confined Within the limits of the drum and clutch mechanism.

In testimony whereof I have signed my name to this specification in the presence of 20 two subscribing witnesses.

PATK. F. DUNDON.

NVitnesses:

A. W. GRANT, P. W. J. LANDER.

Images