US436190A - Hoisting apparatus - Google Patents

Description

(No Model.) 2 SheetsSheet 1 G. W. R'AWSON.

HOISTING APPARATUS.

No. 436,190. Patented Sept. 9, 1890.

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(No Model.) 2 Shets-Sheet 2. G. W. RAWSON.

HOISTING APPARATUS.

Patented Se 12.9, 1890.

ms scams r-E'rzns cm, FHGTOLITNOM wasmusmu u UNITED STATES PATENT OFFICE.

GEORGE WV. RAWSON, OF CAMBRIDGE, MASSACHUSETTS.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 436,190, dated September 9, 1890.

7 Application filed May 29, 1890- Serial No. 353,661. (No model.)

porting a shaft H, provided at each end with To all whom it may concern:

Be it known that I, GEORGE W. RAwsoN, a

Q citizen of the United States, residing at Camclear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same,

" reference beinghad to the accompanying draw- .braced near their inner ends, said rods supings, and to the letters and figures of reference marked thereon, which form a part of this specification.

Figure 1 is a side elevation, Fig. 2 a top view, and Fig. 3 a front elevation, of a hoisting apparatus provided with my invention.

Fig. 4 is a side view, on an enlarged scale, of a portion of the rail or track F with the stop and truck applied thereto,-the bucket also being shown in side view. Fig. 5is asection of the truck and rail on line 1 1 of Fig. 4. Fig. 6 is a horizontal section on line 2 2 of said Fig. 4. Fig. 7 is a side view, Fig. 8 an end View, and Fig. 9 a top view, of the lower end portion of the rail F with the stopWapplied to it. Fig. 10 is a longitudinal section of the said stop. Figs. 11 and 12 are vertical sections in planes at right angles to each other of the headed and flanged thimble arranged on the eyebolt which connects the hoistingcable to the head block of the hoistingbucket.

The nature of my invention is defined in the claims hereinafter presented.

The drawings represent at A a portion of a wharf having a framework B erected thereupon, which may be of any desired length, and at top is provided with a trackway G, on which is mounted awheeled structure D,which contains the hoisting-engine E, and from the upper part of which is projected an inclined rail or track F, jointed or hinged at a, which admits of the outer portion of said track being lowered or folded down into the position shown in dotted lines in Fig. 1.'

A cross-head b is fixed to the outer end of the track F, and to the ends of said crosshead rods or bars G G are pivoted, the latter being properly connected to each other and a flanged wheel 0, the faces of which bear against and when in movement roll on the outer face of upright rails or guides I, fixed to the structure D and extended downin front of the frame-work, as represented in Figs. 1 and 3. Bars K, bent as shown, are fixed to the outer face of the rails I to keep the wheels 0 from falling away from said rails when the track is lowered or folded into the position shown in dotted lines in Fig. 1, and the wheels 0, when the said track is in the position shown in full lines in Fig. 1, are arranged to stand higher than the pivots b, and are kept from rising by a tackle L, attached to the framework and to the shaftH, the said track being thrown forward or outward by drawing the wheels 0 and their shaft from their higher position (shown in dotted lines in Fig. 1) downward by means of said tackle against the rails I and into the position shown in full lines in the said figure.

Guys G G, which are secured to the crosshead, (see Fig. 2,) cross each other and are secured at their other ends to and near the tops of the uprights I, and serve when the track F is forced to its outward position to brace the same to excellent advantage. The track F has the form of an inverted T in cross-section, and on the said track is arranged a truck M. (Shown in Figs. 1 and 2, and also in Figs. 4 and 5 on an enlarged scale.)

The truck M consists of plates or sides e e, arranged one on each side of the rail or track F and connected to each other at the bottom and underneath said rail by the bars ff and also by the rod g, which serves as a journal for the sheaves N 0, over which and sheaves each other. (See dotted lines in Fig 6.) The levers T areeach provided with a semicircutoo lar opening 7r, which, when the jawsare together, form a circular opening through which the hoisting-cable Q passes when raising or lowering the bucket between the truck and the vessel. The said openings in the levers T T encircle the neekZ of a headed and flanged thimble V, which with said levers forms a lock to connect the bucket to the truck while the latter is moving up and down the track F, to be hereinafter explained. The said thimble V, provided with a head '1; and a flange w, connected by a neck Z, encircles a double eyebolt 00, connected at its top to the hoisting-cable Q and at its ,bottom to a shackle y, coupled to an eye 2 in the head-block B of the hoistingbucket. (See Figs. 4, 5, l1, and 12.)

Arranged on the rail or track F is a stop WV for the truck, said stop adapted to be moved thereon to determine the position of thebueket with relation to the hatchway of the vessel.

The stop XV consists of two inclined rails m an, arranged on opposite sides of the track F and bearing on the upper surface of the arms (1 (Z of the said track, said rails being recessed at n and provided with an abutment at 0, against which the lower of the wheels g of the truck rest when the latter is in engagement with the stop. The rails m m are connected together by a double angle-ironj, riveted to their outer sides, the lower part of said iron passing underneath the rail F, (see Figs. 7 and 8,) and to the bottom surface of said iron a double-inclined cam X is fixed, which operates to spread the jaws of the levers T T when in contact therewith (see Fig. 6) to disengage them from the thimble V.

To one side of the stop W is fixed a bracket 13, which supports a rod q, adapted to slide therein, and to said rod a rubber or other spring a" is applied A cable 8 is attached to the other end of said rod q and is led to and around a drum J, fixed to a shaft Y, supported in the upper part of the structure D. A pulley Z is also fixed to the said shaft Y, aband or hand rope 25 passing about said pulley, and a smaller one A arranged below the floor of the structure. (See Fig. 1.) On revolving the said drum X by moving the hand-rope t the position of the stop lV on the rail or track may be determined as desired, and the said stop, being held by the cable 3, provided with the spring 0', can yield when the truck brings up against the abutinents o and break the force of the blow.

The usual system of pedals and levers for operating the apparatus is indicated at C in Fig. 2.

The rail or track F and the supports I I are in many cases applied by me to a fixed tower, shed, or frame-work, instead of to a wheeled structure, as represented.

I The operation of the apparatus may be thus explained: )Ve will now suppose the bucket to be loaded and as being drawn upward. (See Fig. 4.) The longer arms of the levers T T be ing spread apart by the cam X, (see Fi 6,)

.the head 1) of the thimble V will pass between said levers; but the flange w of said thiinble, being of too large diameter to pass between them, will bring up against their under side and will lift the truck and carry the lower wheels g out of the sockets n n of the stop W and will roll the truck up the track F. As soon as the levers T T are out of contact with the cam X they will be forced together and will grasp the neck Z of the thimble V, and thereby lock the bucket to the truck. When the truck has ascended high enough to carry the bucket over either hopper-two being shown at 1 and 2 (see Fig. l)--by unclutching the drum of the cable R, which operates the jaws of the bucket, said jaws will immediately open and discharge the contents of the bucket into the hopper. Next the drum of the bucket-hoisting cable Q is unclutched, and the truck M, with the bucket locked to it, rolls down the track until said truck is checked by the stop W. The levers T T being at the same time spread apart by the cam X, and the thimble V also unlocked from the truck, the bucket will continue its descent without interruption into the hold of the vessel.

From the foregoing it will be seen that by my improvements there will be no waste of time in operating the bucket, the, movement of the bucket from the time it leaves the hold of the vessel till it reaches the hopper being continuous, and the same is the case from the time it leaves the hopper till it reaches the hold of the vessel, and the bucket being auto matically locked to and unlocked from the truck, as explained, and the truck being so applied to the rail that it cannot get off the track, renders the apparatus particularly safe and rapid for the purpose for which it is designed.

)Vhat I claim is"-- 1. In a hoisting apparatus, the rail or track F, jointed and provided with a cross-head, in combination with the bars G G, pivoted to said cross-head and provided with wheels, the structure D, supporting the rail or track and provided with the uprights I and bars K, fixed thereto to guide said wheels in their vertical movements, and the operative tackle L, as and for the purpose explained.

2. In a hoisting apparatus, the truck M, consisting of the sides 6 e, inclined at top and provided with the supporting-wheels g, the bars ff, connecting said sides at the bottom, the sheaves N 0, arranged side by side on a single journal connecting said sides, the levers T T, supported underneath said sheaves and adapted to be moved apart, the axis of the openings 7a in said levers when closed being in the same vertical plane as the middle of the groove in one of said sheaves, and the spring U, in combination with the thimble V, adapted to operate with said levers, as and for the purpose explained.

3. In a hoisting apparatus, the stop W, consisting of the inclined rails provided with sockets, and abutment-s arranged on opposite sides of the rail or track and connected to each other and provided with the double cam, in combination with the rail or track and mechanism for locating the stop thereon, said mechanism consisting of the cable 3, connected to the stop, the drum J, its supporting-shaftand operative pulley, and the operative line or rope 25, substantially as set forth.

4. A hoisting apparatus comprising the structure D, the rail or track F, jointed and provided with the cross-head and supported by said structure, the sheaves or drum P, the uprights I and bars K, fixed to said uprights, the bars G G, pivoted to the cross-head and provided with wheels, the rail or track operative tackle, the truck M and the stop W, each adapted to the rail or track and to each other, essentially as represented, the levers fulcrumed to the truck, the cam fixed to the 20 stop, and the hoisting-cable provided with the in combination with the eyebolt and shackle,

as explained.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. RAWSON. Witnesses:

S. N. PIPER, O. F. DANIELS.

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