US453006A - Crane - Google Patents

Crane Download PDF

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Publication number
US453006A
US453006A US453006DA US453006A US 453006 A US453006 A US 453006A US 453006D A US453006D A US 453006DA US 453006 A US453006 A US 453006A
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Prior art keywords
trolley
jib
crane
levers
motor
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Expired - Lifetime
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Cartier Creation Studio SA
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Assigned to CARTIER CREATION STUDIO SA reassignment CARTIER CREATION STUDIO SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARTIER INTERNATIONAL B.V.
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G25/00Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61JSHIFTING OR SHUNTING OF RAIL VEHICLES
    • B61J3/00Shunting or short-distance haulage devices; Similar devices for hauling trains on steep gradients or as starting aids; Car propelling devices therefor
    • B61J3/08Devices with reciprocated pushing bars or like driving mechanisms combined with the track for shunting or hauling cars

Definitions

  • I11 cranes used in is necessary to employ some power mechanism for moving the trolley back and forth on the jib.
  • a hydraulic cylinder is the mechanism most available for this purpose, but as heretofore used the cylinder must have a length of stroke equal to the length of travel of the trolley, and the inconvenient length of such cylinder and its great weight have so incumbered the cranes as to impede their operation and materially to increase their cost.
  • my invention which makes it possible to use a cylinder of short stroke and of comparatively small and convenient size and light weight.
  • 2 represents the mast of a crane.
  • 3 is the jib, 4 a usual strengthening strut or brace, and 5 is the trolley, to which the burden of the crane is connected and which is adapted to be moved back and forth on the jib;
  • O is a double-acting cylinder set on the jib and having the usual fluid inlet and discharge ports 7 8 at its ends.
  • This cylinder is of short stroke, and its plunger 9 is attached to a crosshead 10, which moves in a suitable guide 11.
  • This guide preferably forms part of a standard or casting 12, which is bolted to the jib, as shown in Fig. 1.
  • the cross-head is connected with the trolley by a system of levers a b c (l, constituting a parallelogram, the levers a and Z) being pivotally connected at one end to the cross-head,the levers 0 (Z pivotally connected with the trolley, and the levers a and 6 being pivotally connected with the lemills and steel plants it vers c and (Z, respectively.
  • the effect is to straighten the lazy-tong levers into nearly upright positions and to retract the trolley a distance much greater than the length of the plungers stroke, as indicated by dotted lines. A reverse movement of the plunger will project the trolley on the jib.
  • the advantages of my improvement will be appreciated by those skilled in the art.
  • the trolley-moving mechanism is reduced to a very small compass, expense is saved, and by affording more space on the jib for the operation of the trolley the effective capacity of the crane is correspondingly increased.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Description

(No M odel.)
T. JAMES.
CRANE.
Patented May 26, 18 1.
r 2 1h 'IIIIIIIIIII'IIIIIMLII nu l wrrness s mun-run THE Nonms PETERS 00,, s-noromrmu wAsnmnYou n. c,
UNITED STATES PATENT EEiciE.
THOMAS JAME S, OF BRADDOOK, PENNSYLVANIA.
CRANE.
SPECIFICATION forming part of Letters Patent N 0. $53,006, dated May 26, 1891. Application filed September 15, 1890. Serial No. 364 962. (N0 model.)
To ctZZ whom. it may concern.-
Be it known that I, THOMAS JAMES, of llrad dock, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Cranes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 shows in side elevation the jib of a crane and my improved mechanism for moving the trolley longitudinally on the jib. Fig. 2 is a plan view thereof.
I11 cranes used in is necessary to employ some power mechanism for moving the trolley back and forth on the jib. A hydraulic cylinder is the mechanism most available for this purpose, but as heretofore used the cylinder must have a length of stroke equal to the length of travel of the trolley, and the inconvenient length of such cylinder and its great weight have so incumbered the cranes as to impede their operation and materially to increase their cost. To remedy this serious practical difficulty is the object of my invention, which makes it possible to use a cylinder of short stroke and of comparatively small and convenient size and light weight.
In the drawings, 2 represents the mast of a crane. 3 is the jib, 4 a usual strengthening strut or brace, and 5 is the trolley, to which the burden of the crane is connected and which is adapted to be moved back and forth on the jib;
O is a double-acting cylinder set on the jib and having the usual fluid inlet and discharge ports 7 8 at its ends. This cylinder is of short stroke, and its plunger 9 is attached to a crosshead 10, which moves in a suitable guide 11. This guide preferably forms part of a standard or casting 12, which is bolted to the jib, as shown in Fig. 1. The cross-head is connected with the trolley by a system of levers a b c (l, constituting a parallelogram, the levers a and Z) being pivotally connected at one end to the cross-head,the levers 0 (Z pivotally connected with the trolley, and the levers a and 6 being pivotally connected with the lemills and steel plants it vers c and (Z, respectively. These lovers are preferably made of flanged beams, such as I-beams, star-iron, &c., so that they shall have sufficient rigidity without excessive Weight. In order to maintain proper parallelism of the levers and to cause them to act in the manner hereinafter described, I connect the levers a and b by diagonal. leverarms or toggles 13 to a fixed point on the jib, which point may be on the standard 12. The levers a Z) 0 (Z constitute a lazy-tong system of levers, and their action is to multiply the extent of motion of the plunger 9. Thus if the plunger be projected to the end of its stroke from its most retracted position, (shown in Fig. 1,) the effect is to straighten the lazy-tong levers into nearly upright positions and to retract the trolley a distance much greater than the length of the plungers stroke, as indicated by dotted lines. A reverse movement of the plunger will project the trolley on the jib.
The advantages of my improvement will be appreciated by those skilled in the art. The trolley-moving mechanism is reduced to a very small compass, expense is saved, and by affording more space on the jib for the operation of the trolley the effective capacity of the crane is correspondingly increased.
Modifications in the form and arrangement of the parts within the scope of my invention, as hereinafter defined,wil1 suggest themselves to the skilled mechanic.
I claim- I 1. In crane mechanism, the combination, with the trolley and jib, of a motor adapted to move the trolley on the jib, and lazy-tong levers connecting the moving part of the motor with the trolley and adapted to multiply the motion of the motor, substantially as and for the purposes described.
2. In crane mechanism, the combination, with the trolley and jib, of a motor adapted to move the trolley on the jib, and levers a, b, 0, cl, and 13, constituting lazy-tongs, connecting the moving part of the motor with the trolley, substantially as and for the purposes described.
8. In crane mechanism, the combination With the trolley and jib, of a motor adapted In testimony whereof I have hereunto set to move the trolley on the jib, a cross-head my hand this 9th clay of September, A. D. guide and a cross-head connected with the 1890.
moving part of the motor, and lazy-tong 1e- THOMAS JAMES. 5 Vers connecting the cross-head with the troll Vitnesses:
ley, substantially as and for the purposes THOMAS W. BAKEWELL,
described. W. B. CORWIN.
US453006D Crane Expired - Lifetime US453006A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130145602A1 (en) * 2011-12-08 2013-06-13 Honda Motor Co., Ltd. Component handling system for assembling vehicles and methods of assembling vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130145602A1 (en) * 2011-12-08 2013-06-13 Honda Motor Co., Ltd. Component handling system for assembling vehicles and methods of assembling vehicles
US9114962B2 (en) * 2011-12-08 2015-08-25 Honda Motor Co., Ltd. Component handling system for assembling vehicles and methods of assembling vehicles

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