US1276390A - Hydraulic elevator. - Google Patents

Description

G. MASSEY. HYDRAULIC ELEVATOR. APPLICATION mm APR. 3. 1916.

1,276,390. 7 Patented Aug. 20, 1918.

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GEORGE MASSEY, OF BEECROFT, NEW SOUTH WALES, AUSTRALIA.

HYDRAULIC ELEVATOR.

Specification of Letters Patent.

Patented Aug. 20, 1918.

Application filed April 3, 1916. Serial No. 88,600.

To all whom it may concern:

Be it known that I, GEORGE MASSEY, a citizen of the Commonwealth of Australia, residing at W'elham street, Beecroft, in the State of New South Wales, Australia, have invented certain new and useful Improvements in Hydraulic Eelevators, of which the following is a specification.

This invention is for the purpose of controlling the working or running of hydraulic elevators by an electrically operated gear which will impart motion to the main hydraulic valve in place of the hand rope or other similar and well known devices heretofore in use; and which will admit of the elevator being worked under the control of the car switch.

In order that my invention may be easily .understood reference will now be made to the accompanying drawings in which Figure 1 is a side elevation and Fig. 2 is an end elevation of the operating gear as applied to the main hydraulic valve of an elevator the power water for the working of which is of low pressure, that is of about 50 to lbs. to the square inch.

Fig. 3 is a plan of a modified gear.

Fig. 4 is a side elevation on line AB of Fig. 3 showing position of gear when the car is stationary.

Fig. 5 is a side elevation on line CD of Fig. 3 showing position of gear when the car is coming down.

Fig. 6 is a side elevation showing position of gear when the car is going up.

Fig. 7 is an end elevation of the main hydraulic valve showing the side links connecting the actuating lever with the perforated tubular spindle which passes through the main hydraulic valve.

Fig. 8 is a plan of the gear showlng a chain sprocket wheel secured on to the boss or sleeve of the clutch in lieu of the worm wheel.

Fig. 9 is an end View showing the modified positions of the electric switches and also of the rope guide pulleys.

Fig. 10 shows diagrammatically one con-- venient arrangement of electrical connections.

Figs. 3, 4:, 5, 6, 7 and 8 illustrate the arrangement of the gear when applied to elevators using the power water at the usual pressure of from 700 to 7 50 lbs. to the square inch.

E is a shaft supported by its bearings E and E F is a drum which is secured upon the shaft E; to the periphery of which the one end of a rope F is attached at or near a position shown by F G is a toothed wheel secured upon the shaftE; H is a worm wheel secured upon the extended boss of the electro-magnetic clutch I which is free upon the shaft E when not magnetically acted upon by the armature P; the armature I which revolves with the shaft E is capable of sliding endwise thereon either toward or from the face of the clutch when influenced either by the magnetic field or the coil spring J K is the feather key fitting in the keyways of the shaft E and the armature P; L and L are the two slip rings by which the electric current is led to and from the coil M; N is an electric motor Whose armature shaft N is secured into the wheel or pulley of the magnetic motor brake N and also into the worm N .Wl1lCh meshes with the worm wheel H; O is a lever one end of which is attached to the toothed sector 0 which meshes with the toothed wheel Gr while the other end is pivoted to the base or wall plate of the main hydraulic valve P; the two side links P P connect thelever O with the perforated tubular spindle P of the hydraulic valve P; Q and Q are two lever electric switches arranged in the electric circuit between the car main switch and the motor N together with its brake N Fig. 10 shows one method of connecting up the parts electrically. When the switch 2 in the car is moved to the left it closes the circuit through the coil in the electromagnetic clutch I, I and also through the circuit including the magnetic brake N the switch Q the switch Q, and the motor N as will be readily seen from Fig. 10. WVhen the switch 2 is moved to the right it closes circuits through the same parts but the current passes through the motor N in the opposite direction and thus reverses its direction of rotation.

The magnetic brake N is arranged so that when current passes throughsame the brake is off and vice versa. I

The cycle of operations will be as followsthat isassuming that the car is stationary and that the various parts of the gear are as shown by Fig. 4: and also that an up trip is to be made by the car then the electric current when switched on by putting over the car switch into the up position will energize the coil M through the slip rings L and L and by the magnetism thereby produced will pull the armature I along the shaft E hard into contact with the face of the clutch I when the motor N will commence to run and turn the shaft E together with the clutch, the worm wheel, the toothed wheel and the drum in a clockwise direction which will by means of the toothed sector raise the lever O and its attached perforated tubular spindle of the hydraulic valve P and so admit the power water on to the hydraulic ram when the car will commence its upward trip; the turning of the shaft E in the direction stated whereby the rope F- is coiled upon the left hand side of the drum F and the weight is raised, will continue until the tappet stud F presses the lever arm of the switch Q, into the position shown by Fig. 6 whereby the circuit will be opened; the brake N will be applied and the motonN will stop. With the gear as shown by Fig. 6 the car will continue on its upward ourney until it approaches the floor or position where it is to be stopped when the car switch will be put into the off position shown in Fig. 10 which cuts out the current from the slip rings and deenergizes the clutch I thus destroying the tractional friction between its poles and armature and allowing the weight R by means of the rope P to bring back the valve lever O and drum F into the position shOWn by Fig. 4.

From the foregoing description it will be evident that the downward ourney of the car may be brought about by putting over the car switch into the down position when the motor and all other parts of the gear will travel in the opposite direction into the position shown by Fig. 5.

Fig. 8 shows a modification in the arrangement for driving the gear by fixing a chain sprocket wheel S upon the extended 'boss of the clutch I in lieu of the worm wheel II and running the gear by a chain from a wheel upon the worm shaft of a motor which may be in some instances more suitably erected some little distance away.

The foregoing description relates to the gear when applied to hydraulic elevators worked by power water of from 700 to 750 lbs. pressure to the square inch.

Then the gear is applied to hydraulic elevators worked by power water of about 50 to 60 lbs. pressure to the square inch the larger volume of water that must be admitted on to the piston of the lifting cylinder necessitates a main hydraulic valve of much larger capacity. This involves increased diameter and stroke of the pistons of this valve and to allow of this increased length of stroke a straight toothed rack T is attached to the upper end of the valve rod W which meshes with the tooth wheel G upon the shaft E as shown in Figs. 1 and 2.

In some installations the position of the hydraulic valve may not be high enough above the floor level to provide for a sufficient run of the weight R, in such a case it will be advisable to arrange the two rope guide wheels U and U above the shaft'E and the switches Q and Q below, and provide for carrying the rope F overhead upon suitable pulleys and thence down to the weight R as shown by Fig. 9.

Having thus particularly described the nature of my invention and in what manner the same is to be performed I claim 1. In an electrically operated gear for controlling hydraulic elevators the combination of a valve controlling the pressure water, a shaft, means'for moving said valve by said shaft, an electric motor, an electromagnetic clutch between said motor and said shaft, means for rendering said clutch operative or inoperative, a drum connected with said shaft, means tending to return said drum to a predetermined position, and means operated by said drum, after it moves away from said predetermined position, to stop said motor.

2. In an electrically operated gear for controlling hydraulic elevators the combination of a valve controlling the pressure water, a shaft, means for moving said valve by said shaft, an electric motor, an electromagnetic clutch between said motor and said shaft, means for rendering said clutch operative or inoperative, a drum connected with said shaft, a weight connected to said drum and tending to return the same to a predetermined position, a switch arranged in the circuit of said motor, and means on said drum adapted to open said switch after the drum moves away from said predetermined position.

3. In an electrically operated gear for controlling hydraulic elevators the combination of a valve controlling the pressure water, a. shaft, means for moving said valve by said shaft in either direction according to the direction of movement of the shaft,

a reversible electric motor, an electromagnetic clutch between said motor and said shaft, means for rendering said clutch operative or inoperative, a drum connected 'with said shaft and adapted to move in either direction from a mid-position, means tending to return said drum to said midposition, a pair of switches arranged in the circuit of said motor, and means on said drum adapted to open one of said switches after the drum moves in either direction away from said mid-position.

4. In an electrically operated gear for controlling hydraulic elevators the combination of a valve controlling the pressure water, a shaft, a pinion mounted on, said shaft, a rack engaging said pinion and connected to the valve said valve being in its mid-position when the rack is in its midposition with relation to said pinion, a reand means operated by said drum, after it versible electric motor, an electro-magnetic moves in either direction away from said clutch between said motor and said shaft, predetermined position, to break the circuit a main switch controlling a circuit for renthrough said magnetic brake and motor.

5 dering said clutch operative or inoperative, In testimony whereof I aflix my signature 15 a magnetic brake, means whereby said main in the presence of two witnesses.

switch also controls a circuit through said GEORGE MASSEY. magnetic brake and said motor, a. drum Witnesses: connected to said shaft, means tending to re- H. C. CAMPBELL,

10 turn said drum to a predetermined position, E. HYDE.

Copies of this patent may be ebtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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