US1476941A - Electric-cable-winding mechanism - Google Patents

Description

Dec. 11, 1923. 1,476,941

w. A. YOUNG ET AL ELECTRIC CABLE WINDING MECHANISM Filed Jan. 15, 1925 3 Sheets-Sheet 1 INVENTORJ'.

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Dec. 11, 1923.

W. A. YOUNG ET AL ELECTRIC CABLE WINDING MECHANISM Filed Jan. 15. 1923 3 Sheets-Sheet 3 I QIILV QNTORS www WW ATTORNEYS Patented Dec. 11, 1923.

UNITED STATES 1,476,941 PATENT oFFlc WILLIAM A. YOUNG AND FRANK BRILL, OF MILWAUKEE, WISCONSIN, ASSIGNORS TO PAWLING AND HARNISCI-IFEGER COMPANY, OF WEST MILWAUKEE, WISCONSIN, A

CORPORATION OF WISCONSIN.

ELECTRIC-CABLE-WINDING MECHANISM.

Application filed January 15, 1923. Serial No. 612,672.

To all whom, it may concern Be it known that we, WILLIAM A. YOUNG and FRANK BRILL, citizens of the United States, residing at Milwaukee, in the county 5 of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Electric-Cable-Winding Mechanism, of which the following is a specification, reference being had to the accompany- 10 ing drawing, forming a part thereof.

This invention relates more particularly to mechanism for taking up and paying out an electric cable or conductor in connection with hoistin apparatus.

Its main jects are to take up and pay out the electric cabe or conductor which supplies current to a lifting magnet or portable electric motor connected with the hoisting apparatus without undue strain on the cable or conductor; to prevent breaking or injuring the cable or conductor in case it encounters obstructions. in the movement of the lifting magnet or portable motor from place to place; and generally to improve the construction and operation of mechanism of this class.

It consists in the construction, arrangement and combination of parts as herein after particularly described and pointed out in the claims.

Figure 1 is a side elevation of winding mechanism embodying the invention as app'ied to typical hoisting apparatus comprising a hoisting drum and a lifting magnet; Fig. 2 is an end elevation as viewed from the right relative to Fig. 1; Fig. 3 is an enlarged longitudinal section on the line 3-3, Figs. 2 and 4 of the cable winding mechanism; and Fig. 4 is an enlarged cross section on the line 44, Fig. 3.

Referring to Figs. 1 and 2, 1 designates a lifting magnet of theusual or any suitable construction, suspended by chains 2 from the hook 3 of a sheave block 4, which in the present instance is provided with two sheaves 5. The sheave block 4 with the hook 3 is suspended by two double lines of cable 7. passing around the sheaves 5 and fastened at one end to a relatively fixed member or members of hoisting apparatus such as the trolley frame 8 of a crane. At the other end the two lines or runs of the I cable- 7 are fastened to a ho s g drum mounted in the frame 8 and driven in the usual manner by a motor (not shown) through a shaft 11, which is mounted in the frame 8 parallel with the axis of the drum 10, and is connected therewith by a pinion 12 and gear -.13. The hoisting apparatus as thus far'described, is like or similar to that in common use, and no claim is made thereto per se.

Referring to Figs. 3 and 4 in connection with Figs. 1 and 2, the cable winding mech anism embodying the present invention comprises a winding drum 15, fixed on a shaft '16, which is supported by bearings 17 and 18 on the frame 8, arallel with the shaft 11 and the axis of t e hoisting drum 10. An insulated electric cable 20 for supp'ying current to the lifting magnet 1, is fastened at one end, as by a clamp 21, to the drum 15,as shown in Fig. 3, and at the other end to the magnet, as shown in Figs. 1 and 2.

The drum 15 is preferably provided at the ends with outwardly projecting flanges 26, to prevent the cable from accidentally running oif the drum, particularly when an obstruction is encountered by the cable, and is preferably formed with a spiral groove to prevent chafing between the turns of the cable and injury to the insulation as the cable is wound and unwound.

The drum is formed at one end with a recess in which the connection between the cable and current supply conductors 22 is madeand enclosed, the recess in the drum being closed and the electric connections between the cable 20 and conductors 22 being protected by a removable cover plate 23. The conductors 22 are connected at their outer ends with collector rin s 24, which are mounted on and insulated rom a sleeve or head 25, fixed on the adjacent end of the shaft 16, the separate conductors being brought together and formed into an insulated cable, which passes through a bore in the adjacent end of the shaft and a lateral opening therein to the clamp 21 within the drum 15.

Insulated brushes 27, bearing on the rings axial ali ment wit ing 17, and is provided with a removable cover 30.

The sleeve or head 25 and a collar 32, fastened on the shaft 16 at the opposite end of the bearing 17, receive the end thrust on the shaft and prevent axial displacement thereof.

On the reduced end of the shaft 16 ad acent the bearing 18, a flanged ratchet and friction'wheel 34 is loosely mounted between a friction face 35 on the drum 15 and a rotary friction driver 36, the faces of the ratchet and friction wheel next to the drum and driver being provided with disks 37 of suitable wearin and friction material such as vulcanized fi er or the like. The flanges 38, which shroud the teeth of the ratchet wheel, are for convenience of construction, made separate and bolted or riveted with the friction disks 37 .to the ratchet wheel.

The hub of the friction driver 36, which is fitted to turn freel in the bearing 18 in h the drum 15 and ratchet w eel 34, is formed in its outer end with a counterbore, and a spring 39 interposed between a washer 40 splined on the shaft 16 and adjusting and lock nuts 41 and 42 threaded on the outer end of the shaft, holds the drum 15, ratchet wheel 34 and driver 36 in yielding frictional engagement with one another, the collar 40 bearing against the inner end of the counterbore in the hub of the driver or against the outer end of a flanged bushing 43 fitted in the hub.

A pawl 45 is pivotally mounted on a pin 46 fastened to the adjacent bearing 18, and is formed with a transverse bore in which are loosely inserted friction drags or shoes 47, with an interposed spring 48, tending to press them outwardly and holding them in yielding frictional engagement with the inner faces of the flanges 38.

When the driver 36 is turned clockwise, as indicated b an arrow on Fig. 4, in the direction to wind the cable 20 on the drum 15, the pawl 45 is thrown by the frictional action of the flanges 38 on the drags or shoes 47, out of position to engage with the teeth of the ratchet wheel 34, as shown in Fig. 4, the outward movement of the pawl being limited by a stop pin 49 fastened in the earin 18.

Under these conditions, the drum 15 is turned in the direction for Winding the cable 20 thereon by the frictional engagement of the driver, ratchet wheel and friction face of the drum, with a force determined by the adjustment of the spring 39.

When the driver is turned in the reverse d direction, or counterclockwise, the pawl 45 is thrown by the action of the flanges 38 on the dra s or shoes 47, inwardly into engagement with the teeth of the ratchet wheel 34, thereby arresting the movement of the ratchet wheel, the driver turning in frictional engagement therewith.

Under these conditions the drum 15 will .be turned in the same direction in frictional ing drum 10 so as to be rotated simultaneously therewith in opposite directions, by any suitable gearing. As shown by the drawing, the shaft 11 which is connected, as hereinbefore described, with the hoisting drum 10 by a pinion 12 and gear 13, is provided with a pinion 51 meshing with a gear 52 fixed on the hub of the driver 36. .The gearing is preferably so proportioned that the friction driver 36 will be rotated at a slightly greater speed than would be required to take up the cable 20 at-the same rate of speed that the magnet 1 is lifted by the hook 3 and cables 7. This insures taking up any slack in the cable 26 and subjecting the cable to a predetermined tension in hoisting the magnet 1, according to the adjustment of the spring 39 which determines the force of frictional engagement between the driver 36, ratchet wheel 34 and drum 15, there being a slight slippage in hoisting between the engaging friction faces of the ratchet wheel and drum or driver.

When the magnet is lowered and the drum 15 is turned in a reverse direction b the pull of the magnet on the cable 20, the friction face 35 on the drum slips on the adjacent friction disk 37 of the ratchet wheel, thereby subjecting the cable to substantially the same tension as in hoisting, determined also by the adjustment of the spring 39, and

, preventing injurious strain on the cable.

In case the cable 20 is caught on an obstruction in transferring the magnet 1 with or without a load, from place to place, it will be unwound from the drum 15 without injury, the drum bein permitted to turn whenever the pull on tie cable is sufiicient to overcome the frictional engagement between the drum and ratchet wheel or between the ratchet wheel and driver.

' In place of a single electric cable containing two wires or electric conductors for supplying current to the lifting magnet, two separate cables each containing a single wire or conductor, may be used and separately connected with the magnet and with a single or two synchronously rotated winding IIllIlS.

The operation of the electric-cable winding mechanism in connection with hoisting apparatus will be apparent from the drawing and foregoing description of the construction and arrangement of parts of such Ill rat/agar mechanism and apparatus, and need not be more specifically explained.

Various changes in the details of con struction and arrangement of parts of the mechanism and apparatus may be made, without departure from the principle and scope of the invention as defined in the following claims.

We claim:

1. In electric cable winding mechanism the combination with hoisting apparatus comprising a hoisting drum, of a winding drum, a friction driver connected and rotatable in opposite directions simultaneously with the hoisting drum, a ratchet wheel located between the winding drum and driver in frictional engagement therewith, and a pawl mounted on a relatively fixed part of the machine and adapted to be automatically thrown into and out of engagement with the ratchet wheel when the movement of the driver is reversed.

2. In electric-cable winding mechanism the combination with hoisting apparatus 1 comprising a hoisting drum, of an electric cable winding drum, an axially movable friction driver mounted in axial alignment with the winding drum and having an actuating connection with the hoisting apparatus adapted to turn it in opposite direc tions simultaneously with the hoisting drum, a ratchet wheel located between the driver and-winding drum in frictional engagement therewith, a, spring holding the driver, ratchet wheel and winding drum in yielding engagement with one another, and a pawl mounted on a relatively fixed part of the machine and movable by frictional contact with the ratchet wheel into and out of positive engagement therewith.

8. In electric-cable winding mechanism the combination with hoisting apparatus comprising a hoisting drum, of an electric cable winding drum, an independently r0- tatahle and axially movable friction driver mounted in axial alignment with the winding drum, and having an actuating connection with the hoisting apparatus adapted to turn it in opposite directions simultaneously with the hoisting drum, .a ratchet wheel rotatably mounted between the driver and winding drum in axial alignment and in frictional engagement therewith, an adjustable spring holding the driver, ratchet wheel and winding drum in yielding frictional engagement with one another, and a pawl mounted on a relatively fixed part and movable by frictional contact with the ratchet wheel into and out of positive engagement therewith.

at. In electric-cable winding mechanism the combination with hoisting apparatus comprising a hoisting drum, of an electriccable winding drum, a rotary friction driver mounted in axial alignment with the winding drum and having an actuating connection with the hoisting apparatus adapted to turn it in opposite directions simultaneously with the hoisting drum, a flanged ratchet wheel mounted between and in axial alignment with the driver and winding drum, a spring holding the driver, ratchet wheel and winding drum in frictional engagement with one another and a pawl pivoted on a relatively fixed part of the machine and provided with a yielding friction shoe engaging the flange of the ratchet wheel and adapted to throw the pawl into and out of engagement with the teeth of the ratchet wheel when the movement of the driver is reversed.

5. In electric-cable winding mechanism the combination with hoisting apparatus comprising a hoisting drum, of a rotary shaft having an axial bore and provided with insulated collector rings adjacent one end, a winding drum fixed on said shaft, a rotary driver, a ratchet wheel mounted between and in axial alignment and fric tional engagement with the driver and winding drum and having an actuating connection with the hoisting apparatus adapted to turn it in opposite directions simulta neously with the hoisting drum, a pawl mounted on a relatively fixed part of the machine and movable by frictional contact with the ratchet wheel into and out of engagement with the ratchet wheel teeth when the movement of the driver is reversed, conductors passing through the bore in the shaft and connecting the electric cable with the collector rings, and insulated brushes bearing on said rings and connected with current supply conductors.

In witness whereof we hereto affix ou signatures.

WILLIAM A. YOUNG. FRANK BRILL.

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