US82799A - canfield - Google Patents

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Publication number
US82799A
US82799A US82799DA US82799A US 82799 A US82799 A US 82799A US 82799D A US82799D A US 82799DA US 82799 A US82799 A US 82799A
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Prior art keywords
levers
brake
rope
barrel
friction
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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
    • B65G17/00Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/12Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element
    • B65G17/123Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element arranged to keep the load-carriers horizontally during at least a part of the conveyor run
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • a B represent a frame, to which all parts of the machine are attached.
  • Q Q' are parallel levers, one of which, Q, is attached to the shaft M, and, through the shaft M, serves to operate :he arm P, and thus to a ⁇ ct upon the brakestrap a b e.
  • the lever Q ishuug to the frame of the machine.
  • R is a parallel bar, carrying two groored pulleys, S S'. Between these pulleys the pull-rope T passes.
  • the levers Q Q When there is no tension upon the pull-rope, the levers Q Q will assume the vertical position, ⁇ and allow the Wholeweight on the barrel C to rest upon the 'levers L L', and thus to act on the brake; but when force is exerted upon the pull-rope T, it will-straighten, as represented by t t, and cause the levers Q Q' to assume the position represented by 1 7, lig. 2, which action throws up the arm P, and loosens the brake-strap a Iz c, thus freeing the brake-wheel from all friction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Description

` nitrh @anni @fitta Letters Patent No. 82,799,'dated October 6, 1868.
IMPROVBD HOISTING-APPARATUS.
, @te .tlnhule etant tu iniflgese finitas ttent ma netting met nf tige same.
TO ALL WHOM IT MAY CONCERN:
Be it known that I, F. I. C ANFILD, of Brighton, in 'the county of Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in HoistingApparatus and VI do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. n
To enable others skilled in the art to make and use my invention, I will proceed to describe its nature, construction, and operation.
The nature of my invention consists- First, in suspending the rope-barrel of a hoisting-apparatus upon levers, said levers being so arranged, 1n
combination with a friction-brake device, that the weight on the hoisting-barrel shall, acting through said levers and brake-device, cause suicient friction on the brake-wheel to hold it, so that the machine will always hold the suspended weight.
Second, in combining, with the abovemnentioned brake-device, levers, so connected with the pull-rope, that, when sutlcient power is exerted on said pull-rope to lift the weight, the friction will be taken from the brakewheel.
Drawings.
Figure 1 is a perspective view.
Figure 2 is a vertical section.
A B represent a frame, to which all parts of the machine are attached.
C is the rope or Winding-barrel, revolving cna journal, H. The journals H, at cach end of the windingbarrel, run in boxes, which rest upon levers L L', but are supported laterally by the housing K'. The ends of thc levers L L' rest upon short Aarms M' M', projecting from the shaft M. This shaft M has also an arm, I, to which one end of the Abrake-strap a b c, fig. 2, is made fast, the other 'end of the str-apbeing attached to thc' frame of the machine, as shown at d, iig. 2. As the brakestr-:iprpasses over the brake-wheel, it will be seen that any pressure brought upou the levers L L' will act, through' the arms M' M' and P, upon the brake-strap a I; c, and thus cause friction upon the brake-wheel E. y
Since the journals of the winding-barrel C rest upon the levers L L', it is obvious that the greaterthe weight upon C', the greater will be the friction exertedy upon the brake-wheel.
The winding-barrel C is driven by the pinion D', which meshes into the spur-gear I), the pinion D' being driven by a rope-wheel, I", constructed in the usual manner. l
I will now proceed to describe the second part of my invention, that is, the device for removing thc friction on thc brake-wheel E.
Q Q' are parallel levers, one of which, Q, is attached to the shaft M, and, through the shaft M, serves to operate :he arm P, and thus to a`ct upon the brakestrap a b e. The lever Q ishuug to the frame of the machine.
R is a parallel bar, carrying two groored pulleys, S S'. Between these pulleys the pull-rope T passes. When there is no tension upon the pull-rope, the levers Q Q will assume the vertical position,` and allow the Wholeweight on the barrel C to rest upon the 'levers L L', and thus to act on the brake; but when force is exerted upon the pull-rope T, it will-straighten, as represented by t t, and cause the levers Q Q' to assume the position represented by 1 7, lig. 2, which action throws up the arm P, and loosens the brake-strap a Iz c, thus freeing the brake-wheel from all friction.
X is a rope, attached to the lever Q, for the purpose of relieving the brake-wheel of friction when it is desired to have the load lowered. f I
Various forms of mechanism might be employed, any one of which would effect a transfer of a portion of the weight from the barrel to the bral edevice, for the purposes of this apparatus. I have contemplated several modifications, among them, an inclined plane, as a'substitute for the levers L L', for that -purpose. The
specific mode of eifeotingthis transfer is not the essence of my invention, and therefore I do not limit myself to the particular device described for accomplishing that object.
I am aware that a number of hoisting-machines have been made, in which the weight, acting, not through the barrel and its journals, but through return-rope, 35o., actuates some brake-device. I therefore limit my claim tothe us'e of the' weight on th'e journals of' the winding-barrel Yfor this purpose.
Claims.
What I claim as my invention, and desire to secure by Letters Patent of\ the United States, is- 1. The hoisting-barrel C, when supported independently of the xed bearings K K', arranged and operating substantially as shown, und for the purpose set forth.
2. The levers L'L, when so arranged, in relation to the winding-barrel C, as to convey a portion f tho weight suspended therefrom to act upon the brake-device, substantially as described, andfor the purpose set forth.
3. The general arrangement ofv the levers Q Q', bar R, and guide-rollers SYS', when acted upon bythe A lateral motion of the pull-rope T, substantially as described, and for the purpose set forth.
Y n P. CANFIELD.
Witnesses:
WILLIAM Epsom FRANK G. PARKER.
US82799D canfield Expired - Lifetime US82799A (en)

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