US 609615 A
Description (OCR text may contain errors)
No. 609,6!5. Patented Aug. 23, I898. H. FULLER.
CARRIAGE MECHANISM FOR HOISTING AND CONVEYING MACHINES.
(Applicatipn filed Mar. 26, 1898.)
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CARRIAGE MECHANlSM FOR HOISTING AND CONVEYING MACHINES.
(Applicakion flleii Mar. 26, 1898.)
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HARRY FULLER, OF CLEVELAND, onto; ASSIGNOR' TO THE KING BRIDGE COMPANY, OF SAME PLACE.
CARRIAGE MECHANISM FOR HOISTING AND CONVEYING MACHINES.
SPECIFICATION forming part of Letters Patent No. 609,615, dated August 23, 1898.
Application filed March 26, 1898.
To all whom it may concern:
Be it known that I, HARRY FULLER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Carriage Mechanism for Hoisting and OonveyingMachines, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings.
The invention relates to the mechanism whereby the sheave-block from which the load is suspended may be looked to and unlocked from the traveling carriage of a hoisting and conveying machine.
The object of my invention is to provide novel and simple mechanism which will operate wherever the carriage may be, whereby the actuation of the hoisting-cable alone will result in the locking and unlocking of the carriage and sheave-block or other load-supporting device.
The invention consists in the construction and combination of parts hereinafter described, and pointed out definitely in the claims.
In the drawings, Figure 1 is a side elevation of the carriage. Fig. 2 is a transverse vertical sectional view on line 2 2 of Fig. 1. Fig. 3 is an enlarged side view of the carriage and other mechanism adjacent to the slots in the side plates of the carriage; Fig. 4 is a view similar to Fig. 2, but showing the parts in different positions.
Referring to the parts by letters, A represents the carriage, which is fitted with wheels or, adapted to ride on elevated tracks B B. This carriage is moved backward and forward on these tracks in the usual manner-that is to say, by cables F F, attached to its ends.
The carriage includes two parallel side plates 0 C, which extend below the tracks. The lower edges of these plates are curved outward to facilitate the entrance between them of the sheave-block D, as shown in Figs. 2 and 4. In each side plate 0, extending from the bottom upward, is a slot 0, whose lower edges are curved outward to facilitate the entrance of a head E, which is secured to the sheave-block and extends laterally on both sides thereof. The side edges of these slots ,closed are approximately horizontal.
Serial No. 675,208. '(No model.)
are reinforced by slotted plates K K, which are riveted to the side plates 0 G and have the flanges k k, which follow the outlines of the slots 0 0. Two sheaves H H, located, respectively, in front of and behind these slots 0 0, lie between the side plates C C and are rotatably mounted on shafts h h, secured to said plates. The hoisting-cable J, one end of which may be fixed, passes over the sheave H, down under the sheave d of the sheaveblock, up over the sheave H, and thence to suitable mechanism (not shown) for taking in and paying out this cable. If the carriage is held immovable and the cable J is taken in, the sheave-block and its load are raised, and if this cable be paid out the sheave-block will descend unless it be locked to the carriage.
The present invention relates, as before stated, to the mechanism,\vhich will be caused to operate by the hoisting-cable, for locking the sheave-block to and unlocking it from the carriage wherever the carriage maybe.
Pivoted to a block 0 which is made fast to the carriage, between the side plates thereof, are two laterally-swingingjaw-levers M M, which pass through and operate in the slots 0 0. These levers tend to fall by gravity toward each other; but to insure this movement (which closes the jaws) and to prevent the levers from being swung outward too far when the head E strikes them other mechanism may be employed-namely, the links P P, composed of two telescopic parts 19 p (which are pivoted, respectively, to the jaw-levers M and ears on the plates K) and the springs 10 (which act to elongate this compound link.) On the lower ends of these levers are the jaws m, whose upper surfaces when the jaws are Below these surfaces the approximate faces m of the jaws are beveled outward, as shown. The jaws are prevented from approaching too near to each other by the engagement of the ends of the pivot-pins n, on which the dogs N are pivoted, with the flanges 70 k.
The head E of the sheave-block is upon its upper surface of such form that it may enter between the lower ends of thej aw-levers and by a wedging action on these beveled ends force the jaws open. This top surface of this head,
as shown, is approximately semicylindrical;
-scribed action of the jaws.
but this form may obviously be varied, it being only necessary that it should have such shape that it can enter between the jaws and act as a wedge to force them open. When the head has passed the jaws 1%, said jaws close beneath the head, which when the hoisting-cable is slackened drops until it rests upon the substantially horizontal surface of said jaws.
Pivoted to each jaw-lever, above the jaw thereof, is a dog N, which is adapted to fall by gravity, so that it rests upon and covers the top surface of the jaws and projects beyond the inner edge of said surface, as shown in Fig. 4. When the head of the sheaveblock is entering between the jaws, it strikes the projecting ends of these dogs, as shown by dotted lines in Fig. 4, and lifts them. Wherefore these dogs do not interfere with the de- The pivots of these dogs are near their outer lower corners. Wherefore the dogs tend to fall by gravity into the position shown in Fig. 4, where they rest upon the jaws m. The dogs are prevented from swinging outward past their centers of gravity by pins m which are fast to the j aw-levers and project into recesses in the sides of said dogs and are adapted to engage with the ribs n at the front edges of said dogs.
When it is desired to lower the sheaveblock, it is first raised a short distance by taking in the cable J until its head E passes said dogs. The dogs then fall to the position indicated in Fig. 4, in which position their upper surfaces are oppositely inclined from their inner ends upward and outward. If now the sheave-block is lowered, the corners of the head E will engage with these inclined surfaces.
Having described my invention, I claim 1. The combination of a carriage, two jawlevers M M pivoted thereto, and dogs N N pivoted to said jaw-levers, with a load-supporting device having a laterally-extended head E, and means for hoisting and lowering the load-supporting device, substantially as specified.
2. The combination of a carriage A, its two side plates 0 0 having the slots 0 c, the pivoted jaw-levers M M, and the dogs N pivoted to said jaw-levers, with the sheave-block D having a laterally-extended head E, and the hoisting-cable, substantially as specified.
3. The combination of a carriage A, the two depending vertical side plates 0 0 whose lower ends are curved outward, said plates having vertical slots 0 0, whose lower ends are beveled outward, with two j aw-levers pivoted to said carriage on opposite sides thereof and which levers work through said slots, dogs pivoted to said levers, and the sheave-block D having a laterally-projecting head E, and the hoisting-cable, substantially as specified.
4. The combination of the carriage A, the side plates 0 C forming a part thereof and having the slots 0.0, the jaw-levers M pivoted to said side plates and operating through said slots, the dogs N pivoted at their outer edges to the said levers and adapted to fall by gravity upon the approximately horizontal jaw-surfaces of said levers and to overhang the same, and stops to prevent the dogs being swung over their pivots, with the sheavevblock D, its head E, and hoisting-cable, substantially as specified.
5. The combination of the carriage A, its side plates C 0 having the slots 0 c, the jawlevers M M pivoted to the carriage and operating through said slots, the links, composed of two telescoping parts 0, 9, and the spring 19 which links are pivotally connected at their ends with the jaw-levers and carriage, and the dogs N pivoted to said levers, with the sheave-block D, its head E, and the hoisting-cable, substantially as specified.
In testimony whereof I hereunto affixmy signature in the presence of two witnesses.
E. L. THURsToN, PHILIP E. KNOWLTON.