US1938338A

US1938338A - Controlling device

Info

Publication number: US1938338A
Application number: US639549A
Authority: US
Inventors: Francis A Jimerson
Original assignee: Ingersoll Rand Co
Current assignee: Ingersoll Rand Co
Priority date: 1932-10-26
Filing date: 1932-10-26
Publication date: 1933-12-05
Anticipated expiration: 1950-12-05

Description

3- F. A. JIMERSON 1,933,338

CONTROLLING DEVICE Filed Oct. 25, 1932 2 Sheets-Sheet 1 I N V EN TOR.

H15 A TTORNEY Dec. 5, 1933. F JIMERSQN 1,938,338

CONTROLLING DEVICE Filed Oct. 26, 1952 2 Sheets-Sheet 2 1' I12 '2 INVENTOR.

I}: LsAzfi'r/zerwn H15. A TTORNEY Patented Dec. 5, 1933 UNITED STATES PATENT OFFICE CONTROLLING DEVICE Francis A.

Ingersoll-Rand Jimerson, Athens, Pa., assignor to Company, Jersey City, N. 1., a

This invention relates to controlling devices, and more particularly to a controlling device for power driven hoists employing clutch means for connecting the winding drums to the driving element.

One object of the invention is to equip the hoist with a single controlling element for effecting the connection between the driving and driven elements and for controlling the power supply to the motor whereby these elements are driven.

Other objects will be in part obvious and in part pointed out hereinafter.

In the accompanying drawings illustrating the invention and in which similar reference characters refer to similar parts,

Figure l is a longitudinal sectional elevation of a hoist and its motor having the invention applied thereto,

Figure 2 is a front elevation partly in section of the controlling device constructed in accordance with the practice of the invention,

Figure 3 is a sectional elevation taken through Figure 2 on the line 3-3 looking in the direction indicated by the arrows, and

Figure 4 is a sectional elevation taken through Figure 3 on the line 4-4 looking in the direction indicated by the arrows.

Referring more particularly to the drawings, A designates a hoist comprising a casing B wherein are arranged a pair of winding drums C and D. At one end of the casing 13 is a motor E the casing F of which serves as a closure for the end of the casing B.

The motor is illustrated as being of the fluid actuated type having radially arranged cylinders G seated in the casing F. Within the cylinders G are pistons H having rods J which are connected to a common crank pin K of a shaft L extending longitudinally through the drums C and D.

Encircling the shaft L is a hollow shaft 0 upon which the drums C and D are loosely mounted. The shaft 0 may be connected with the shaft L in a well known manner, as for instance by suitable reduction gearing (not shown) for transmitting the rotary movement of the shaft L to the shaft 0.

On the inner or adjacent end of the drums C and D are annular flanges P and Q, respectively, upon the outer surfaces of which are arranged brake bands R whereby the drums may be locked or held stationary with respect to the shaft 0.

Suitable devices are provided for connecting the drums C and D to the shaft 0 to rotate therewith. These devices include clutch shoes 8 which lie within the flanges P and Q and have their seating surfaces T curved to conform to the curvature of the flanges against which they seat. The shoes S may be in the form of segments and are supported by screw-jacks U which seat with one end against the shoes 8 and with their other ends upon collars V mounted loosely upon and movable longitudinally on the hollow shaft 0. The shoes S are additionally supported by drum drivers W keyed to the shaft 0. The drum drivers W lie in the same transverse plane as the flanges P and Q and in the present instance are provided with ribs X to engage and guide the shoes S.

Disposed upon the hollow shaft 0 and between the collars V is a sleeve Y for actuating the collars V to press the clutch shoes 8 into engagement with the flanges P and Q. The sleeve Y may be held against rotation, in known manner, by a yoke Z suspended from a pivot pin b seated in the casing B and having teeth 0 at its lower end to engage a pinion d arranged beneath the shaft 0. The pinion d is mounted upon and keyed to a rod e which extends transversely of the casing B and may be suitably journalled therein.

The motor E includes in its organization a valve f of known type which may be actuated by the motor and has ports and passages for distributing the pressure fluid to the cylinders G and to control the exhaust of fluid therefrom. Such pressure fluid is conveyed to the chest 9, wherein the valve f is arranged, by a pipe h leading from a valve chest secured to the side of the casing B.

The valve chest 1 encases a rotary throttle valve k, which controls communication between pressure fluid supply and the pipe h. A stem p of the throttle valve k is journalled in an extension 0 of the valve chest and. carries a lever q which is aflixed to the stem p and depends therefrom so that its outer or free end r lies substantially across and closely adjacent the end of the rod e.

In order to normally maintain the throttle valve in closed position a spring a of the coil type is disposed about the end of the extension 0 and has one end anchored to the extension 0 and the other end to the lever q to rotate the throttle valve k to the closed position.

Disposed upon the rod e is a lever t which extends laterally of the rod and is aflixed thereto by a pin u. Near the outer or free end of the lever is an aperture 1; to accommodate a pivot pin :0 which also extends through a handle 2: whereby the rod e and the throttle valve is may be actuated. Within the handle .1: is a slot 1! for the accommodation of the lever t, and at the lower end of the handle is a web a against which the free end 1' of the lever 1: seats and which in turn may seat against the end of the rod e.

To the end that the rod e and the handle a: may be normally maintained in or rocked to a neutral position in which neither clutch device connects a drum with the hollow shaft 0 in the absence of manual pressure against the handle a: the rod e is provided with a spring 2 to act, in this instance, against the handle structure and the casing B of the hoist.

The spring 2 comprises a coiled portion 3 of which the coils encircle a boss 4 of the lever t and which is disposed on the end of the rod e. The end coils of the spring 2 terminate in laterally projecting ends 5 which lie on opposite sides of pins 6 and 7 amxed to the casing B and the lever t, respectively. The pins 6 and 'l are located above the rod e and are preferably arranged in the same radial plane with respect to the rod.

Suitable stop devices are provided to prevent unlimited movement of the lower portion of the handle a: in the direction of the lever q. To this end the lever t is provided at its outer extremity with a lug 8 to act as an abutment for a rib 9 on the handle 2, said rib being located at the upper end of the slot 1 The operation of the device is as follows: In the absence of pressure against the handle a: the handle occupies the neutral position illustrated in Figures 1, 2 and 3. The clutch shoes S will then be out of frictional engagement with the flanges P and Q and the throttle valve 1: occupies its closed position to cut of! communication between the source of pressure fluid supply and the motor. The rod e and the lever are held in this position by the spring 2, and the handle 1: will be further held in a position wherein the web portion 2 seats against the end of the rod e by the force of the s which presses the lever q against the we a and the web 2 against the rod e.

Whenever it is desired to operate the hoist, the handle .1: is rocked about the pivot 10, that is, the upper portion of the handle is rocked toward the hoist and the web 2 will, in consequence, be rocked in the direction of the free end 1' of the lever q. Due to this movement of the lever q the throttle valve is will be opened. Pressure fluid then flows through the conduit h to the valve 1, whereby it is distributed to the cylinders G for driving the motor E and thus the shaft L and 0 connected thereto. One or the other of the drums C or D may then be connected to the shaft -0 by rocking the handle :1: either to the right or to the left, (Figure 1) depending upon whether it is desired to lift or lower the load.

The described movement of the handle a: and the rod e connected thereto causes the clutch shoes 8 to engage an adjacent flange, either P or Q, and the drum thus connected will then rotate with the shaft 0.

In the inclined position which the handle a: will then occupy the handle will also remain in its power controlling position, that is, the web a will be pressed against the lever q so that the throttle valve is will be maintained in a position to establish i'ull communication between the motor and the source of pressure fluid supply.

After the load has been moved to the desired elevation or point, the brake means, 01 which the bands R form a part, are applied to hold the drum or drums stationary. The handle a: may then be released and the spring 2 will restore it to its neutral position. One end 5 of the spring will be pressed against the pin 6 in the casing B and the other end 5 will act against the pin 7 and thus rock the handle 1:, the rod e and the elements controlled thereby to a position wherein the several pairs of clutch shoes will be released from their respective flanges.

Simultaneously with the action of the spring 2 the spring s will rotate the throttle valve k to its closed position, thus cutting off the supply of pressure fluid to the motor and, inasmuch as the lever q acts against the web 2 of the handle a,

the handle will also be rocked about the pivot w in readiness for a succeeding operation.

From the foregoing description it will be apparent that both the clutching devices and the throttle valve is may be conveniently controlled by one control lever or handle and that the throttle valve k may be simultaneously actuated by the handle 1: in any limiting or intermediate positions of the handle.

Although I have herein described only one complete embodiment of my invention, it will be understood that this form of the same is shown only for the purpose of illustration and that it may be further modified without departing from the spirit or the scope of the appended claims.

I claim:

1. In a hoist, the combination of a drum and a drive shaft, a clutch for connecting the drum to the drive shaft, a motor for rotating the drive shaft, a power controllling device for the motor, a rod operatively connected to the clutch for actuating the clutch, a lever amxed to the rod, a handle on the lever for actuating the rod, a pivot pin connecting the handle to the lever to enable the handle to be oscillated relatively to the lever for actuating the power controlling device, and means for restoring the handle to a neutral position upon release of the handle.

2: In a hoist, the combination of a drum and a drive shaft, a clutch for connecting the drum to the drive shaft, a motor for rotating the drive shaft, a power controlling device for the motor including a lever, a rod operatively connected to the clutch for actuating said clutch and having a lateral projection, a handle on the projection for actuating the rod and being pivoted to the projection, thereby enabling the handle to be moved relatively to the projection for actuating the power controlling device, a spring acting against the rod for moving the clutch out of engagement from the drum, and a spring for maintaining the lever seated against the handle.

3. In a hoist, the combination of a pair of drums and a drive shaft, a clutch for connecting the drums to the drive shaft, a motor for rotating the drive shaft, a power controlling device for the motor, clutch operating means movable to positions for effecting engagement between the clutch and the drums and being movable to a neutral position, a handle on the clutch operating means movable therewith, means for actuating the clutch to a neutral position upon release of the handle, a pivot connecting the handle to said means whereby the handle may be moved for actuating the power controlling device from any position of the clutch operating means, and means for causing the power controlling device to follow the pivotal movement of the handle.

4 In a hoist, the combination of a pair of drums and a drive shaft, a clutch for connecting handle to said means whereby the handle may be moved for actuating the power controlling device from any position of the clutch operating means, and spring means acting against the clutch operating means for restoring said means to a neutral position upon release of the handle.

FRANCIS A. JIMERSON.