US331273A - Norman - Google Patents

Description

(No Model.)

N. 0. BASSETT.

HYDRAULIC ELEVATOR. ru 331,273.

UNITED STATES PATENT Wilden.

NORMAN C. BASSETT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CRANE BROTHERS MANUFACTURING COMPANY, OF SAME PLACE.

HYDRAULIC ELEVATOR.

SPEGIPICATION forming part of Letters Patent No. 331,273, dated December 1, 1885.

Application filed June 16, 1884. Serial No. 135,071. (No model.)

To all whom, it may concern:

Be it known that I, NOR-MAN G. Blissnr'r, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Improvement in Hydraulic Elevators, of which the following is a full description, reference being had to the accompanying drawings, in Which Figure 1 is a plan view with the water-pipe and a portion of the cylinder-head in section; Fig. 2, an end elevation with a portion of the water-pipe in section; Fig. 3, a side elevation with the water-pipe in cross-section through the regulating ball 01' valve; Fig. 4, a plan view with the water-pipe and a portion of the cylinder-head in section, showing a controlling device for the ball valve or governor.

This invention relates to hydraulic elevators, and has for its object to se1f-control the flow of water and automatically regulate the speed at which the cage travels; andv its na ture consists in the devices and combinations of devices hereinafter described, and specifically pointed out in the claims, for attaining the object sought.

In the drawings only one head or end of the watercylinder and the first section of the one pipe therefor are represented, as the other devices may be of any of the usual and well-known forms of construction and arrangement for elevators of the hydraulic class, in which the motive power is furnished by a piston traveling in the cylinder and operated by the speed of the water which enters the cylinder, the piston-rod carrying pulleys or sheaves, over which the hoisting-cable travels in the usual manner-as, for instance, as illustrated in my application No. 135,070, filed of even date herewith.

A represents the cylinder; B, the inlet-head attached to the end of the cylinder in the usual manner to have a tight joint; 0, the waterpipe, the end of which, as shown, is provided with a flange, by means of which and suitable bolts it can be secured to the cylinderhead, as usual.

The water-pipe O is of the usual construction, except that it has an enlarged portion, (a, and a bearing, a, in which is an opening, a, as shown in Fig. 1. As shown, the enlarged portion a is not a full sphere, its ends being foreshortened by the opening of the pipe 0, and this enlarged portion a is located forward of the outer end of the pipe 0. The pipe 0 5 has located therein a ball or sphere, b, which is securely attached to a rod, 21, by a set-screw,

b, or in any other suitable manner. This rod 1) lies within the tube 0 for a portion of its length, and the end within the tube is sup- 6 ported by a cross-piece, 0, extending from one side of the tube to the other, as shown in Figs.

1 and 2, or in any other suitable manner, and the rod passes out from the tube through a suitable stuffing-box, 0, located in the open- 6 ing a of the support a, and extends some distance beyond the end of the tube 0. The projecting end or portion of the rod b passes within a yoke or guide, (1, its end extending some distance beyond the end of the guide, as shown. 0 The guide or yoke 01 has its base (7/ bolted or otherwise securedto the support a, and, as shown, the'side pieces of this yoke d are provided with slots (1 in which are located bolts d. (See Figs. 1 and 2.) The rod 71 within 75 the yoke d has located thereon a threaded collar, e, which is looked and held in any de sired position by a set-nut, f, and the upper end of this red b has thereon a collar, e,which is locked and held in any desired position by a set-nut, f, and a jan1-nut,f, in the form of construction shown; and, as shown, the packing-box c is provided, as usual, with a cap or cover, f through which the rod 2) slides. Around the rod 1), between the collars e and 8 e, are coiled springs cf, each spring at one end abutting against the upper end of the yoke d, the end of the yoke being suitably formed for that purpose, and the tension of these springs is adjusted by setting the collars e e go farther away or closer to the yoke end, as required for the degree of tension.

The form of construction shown in Fig. 4 is the same as that already described, except that the support a is made longer, andis provided 9 5 with an opening, a, of a larger diameter, and in this opening is located a cylinder, in which moves a piston, g, which piston is secured in any firm manner to the rod 1). The interior of the cylinder 9 has communication IOO with the interior of the pipe 0 through one or more holes, h, and the piston g is provided with holes 6, by means of which water can pass from the interior of the pipe 0 to the opposite side of the piston, and, as shown, a suitable packing, j, is provided between the base d of the yoke and the end of the cylinder to prevent the escape of water at that point.

The operation is as follows: The ball b,when the elevator-cage is running at a maximum speed, stands centrally within the enlarged portion a of the water-pipe, leaving a full passage between it and the walls of the portion a for the passage of the waterto and from the cylinder, and when the desired maximum speed has been ascertained the springs e f are adjusted to have the ball remain unaffected for the maximum speed or any speed thereunder; but in case the inflow of water is stronger than required to produce the maximum running speed such inflow acts on the ball I) and forces it forward against the tension of the spring e, andas the opening in the pipe 0 is of less diameter than the opening in the enlarged portion a such forward movement of the ball I) will close down the opening and lessen the speed of the water and check the speed of the elevator. The forward movement of the ball or governor b, to check the flow of water, is proportionate to the increase beyond the rapidity desired, the spring 6 being adjusted for such rapidity, and its resistance being overcome as the flow increases beyond the maximum required. their location between the collars c and c, act as a resisting-spring in both directions, and this resisting-spring will act to return the ball or governor to its central position when the speed is at or below the maximum, and if the descent does not pass beyond the maximum the ball I) will remain central of the passage a; but in case the descent becomes too rapid a corresponding increase in the outflow over the maximum is produced, and this increase, acting on the ball I), forces such ball backward and checks the outflow to reduce the speed to or below the maximum in the same manner as on the inflow. It will thus be seen that the ball or governor is selfacting, from the speed or pressure of the water both on the inflow and the outflow, and that by this means the speed at which the elevator travels can never pass beyond the maximum at which it is intended it should travel. The device is very simple, can be readily applied, and will perform the work required in an effectual and reliable manner. The limit at which the ball operates in either direction is controlled, in the form of arrangement shown in Fig. 1, by the heads of the bolts d, against which the collar 6 can strike, and thus limit the movement of the rod outward or inward, and these bolts can be adjusted in their slots (2 closer together or farther apart, as is desired the ball should have a decreased or an increased movement.

Instead of forming stops by bolts d", other forms of stops could be usedas, for instance,

The springs e f, owing to a collar could be placed to engage movable pins or other devices on the yoke.

The arrangement shown in Fig. 4 operates in the same manner so far as controlling the speed of the water by the ball or governor is concerned; but a controlling device formed by the cylinder 9 and piston g is provided to prevent a too sudden or rapid movement of the ball in case of increased flow in either direction. The water passes from the water-pipe 0 through the openings it into the interior of the cylinder 9, and thence through the openings t forward of the piston-head g, entirely filling the cylinder, so that as the increased inflow occurs the rod 1) carries forward with it the piston g, which piston is resisted against a sudden movement, as the water between it and the forward end of the cylinder must be displaced and pass back through the openings 2', and the resistance thus offered is sufficient to produce such gradual movement of the ball or governor as not to cause injurious effects. The descent of the cage, in case it becomes too rapid, will cause the piston g to travel back in the cylinder, and such movement is resisted by the water, which must be displaced and pass through the openings t forward of the piston-head. This gradual travel of the piston in either direction produces a corresponding gradual travel of the ball or governor to the limit of its forward and backward movement, so that the check on the speed will be a gradual one, and not a sudden transition that would produce a jar or strain on the parts.

This self-acting governor is shown located in the water-pipe leading to a horizontal cylinder; but it can be located in the water-pipe for other forms of cylinders, and can also be used in connection with cylinders having a separate inlet and outlet pipe instead of a common one, as shown; and the manner of locating such governor, as well as the form of the governor, can be varied from that shown, and other means than the arrangement of springs shown can be used for the resistance and returning the governor to its normal position with the decrease of the speed, so long as the speed or flow of the water furnishes the medium through or by which the governor is self-controlled in a direct manner, the main feature of the invention consisting in providing a governor located and operating in the water-pipe of a hydraulic elevator and actuated directly by the speed of the water in the pipe.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the piston-cylinder A of a hydraulic elevator, of the fluid inlet and outlet pipe 0, having a chamber, a, of larger diameter than the diameter of the openings at the ends of the pipe, and a ball-governor, b, located in the said enlarged chamber, and automatically moved by the speed of the fluid flowing into and out of the cylinder, to diminish the speed of such inflowing and outflowing fluid, and thereby control the speed of the elevator in its ascent and descent, substantially as described.

2. The combination, with the piston-cylinder A of a hydraulic elevator, of the fluid inlet and outlet pipe 0, having a chamber, co, of larger diameter than the diameter of the openings at the ends of the pipe, a vertical rod, 2), held under spring-tension, and a ball-governor located on the rod in the enlarged chamber, and automatically moved by the speed of the fluid flowing into and out of the piston-cylinder, to control the speed of such inflowing and outflowing fluid, and thereby regulate the speed of the elevator, substantially as described.

3. The cylinder A, pipe 0, having an enlarged portion, a, ball 0, and rod'b, in combination with the yoked, springs c and f, and collars e e, substantially as and for the purpose specified.

4. The cylinder A, pipe 0, having an enlarged portion, a, ball 6, and rod b, in combination with the yoke d, bolts d, slots d, springs e and f, andcollars e e, substantially as and for the purpose specified.

5. The cylinder A, pipe 0, having an enlarged portion, a, ball I), and rod b, in combination with the cylinder g, having communication with the said pipe, and piston-head 9, having openings i, substantially as and for the purpose specified. I

6. The cylinder A, pipe O, having an enlarged portion, a, ball b, and rod 12', in combination with a resisting-spring, 6, cylinder 9, having communication with the said pipe, and piston-head g, substantially as and for the purpose specified.

7. The combination, with the piston-cylinder of a hydraulic elevator, of a pipe for the inflow and outflow of water to and from such cylinder, and a governor located in said pipe, and automatically moved by undue speed in the flow of the water into or out of the cylinder, to diminish the speed of such inflowing and outflowing fluid, and thereby control the speed of the elevator, substantially as described.

' NORMAN G. BASSETT.

Witnesses:

O. W. BOND, ALBERT H. ADAMS.

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