US225330A - Oscillating hand-chain guides - Google Patents

Oscillating hand-chain guides Download PDF

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US225330A
US225330A US225330DA US225330A US 225330 A US225330 A US 225330A US 225330D A US225330D A US 225330DA US 225330 A US225330 A US 225330A
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chain
hand
wheel
guide
shaft
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains

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  • the subject of my invention is an oscillating guide-frame having bearings on the shaft of the hand-chain wheel on each side of the latter, and carrying bell-shaped guides, through which the hand-chain passes, permitting 'the deflection of the chain Without reducing the amount of chain on the wheel, and insuring the correct guiding of the chain in all positions.
  • Figure l is a front elevation of the device, showing the hand-chain in deflected position.
  • Fig. 2 is a plan.
  • Fig. 3 is a perspective view of the oscillating guide-frame detached.
  • A represents a hand-chain Wheel, operated by a chain, B, and running on a shaft, C, which may bca stud-shaft, as shown, the wheels A, having cogs, driving the screw-shaft by means of a pinion; or, it' preferred, the shaft C may be a screw-shaft keyed in the wheel.
  • the screw-shaft in either case, is employed to (Not shown.)
  • D D represent the two sides of my oscillating guide-frame, having their bearings on the shaft on each side of the wheel A, and carrying at their respective ends bellmouthed guides E E, which form the extremities ofthe guide-frame.
  • the entire guide D D E E is preferably made in a single casting.
  • My improved hand chain-guide oscillates, as shown in Fig. l, on the center aXis of the hand-chain wheel, but allows the chain to be drawn from the wheel at any angle without binding against the guard or guide.
  • the effect of the deflection of the chain is to deect the guide to any required position, so as to relieve it of all strain, while the guide causes the chain to hug thewheel closely and keep the same amount of effective chain on the Wheel when itis in any deccted position. It is applicable to any wheel where a hand-chain is used, but specially to portable hoists. It enables the man operating it to keep from under the load.
  • the guide being adapted to follow the chain without resistance in either direction, is 'always on duty, and protects the hand-chain wheel from danger of breakage or injury, thus constituting a most effective guard to the wheel.
  • My'invention is essentially different from that referred to in constituting an effective guide for a hand-chain wheel when in any deflected position, dispensing with the need of grooved guide-pulleys and adapting the handvchain to operate on the wheel as well in de- E E, and having its bearings on a shaft,.C, on,
  • each side of a hand-chain wheel, A as shown and described, and ⁇ adapted to keep the same amount of effective chain on the Wheel when it is in deflected position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

operate hoisting-Wheels. 30,
UNITED STATES PATENT OFFICE.
ALFRED BOX, .OF PHILADELPHIA, PENNSYLVANIA,
OSCILLATING HAND-CHAIN GUIDES.
SPECIFICATION forming part of Letters Patent No. 225,330, dated March 9, 1880.
Application led August 29, 1879.
To all 'whom it may concern.:
Be it known that I, ALFRED BOX, of the city of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in Oscillating Hand-Chain Guides for Hoisting Apparatus, of which the following is a specification.
The subject of my invention is an oscillating guide-frame having bearings on the shaft of the hand-chain wheel on each side of the latter, and carrying bell-shaped guides, through which the hand-chain passes, permitting 'the deflection of the chain Without reducing the amount of chain on the wheel, and insuring the correct guiding of the chain in all positions.
In the accompanying drawings, Figure l is a front elevation of the device, showing the hand-chain in deflected position. Fig. 2 is a plan. Fig. 3 is a perspective view of the oscillating guide-frame detached.
A represents a hand-chain Wheel, operated by a chain, B, and running on a shaft, C, which may bca stud-shaft, as shown, the wheels A, having cogs, driving the screw-shaft by means of a pinion; or, it' preferred, the shaft C may be a screw-shaft keyed in the wheel. The screw-shaft, in either case, is employed to (Not shown.)
D D represent the two sides of my oscillating guide-frame, having their bearings on the shaft on each side of the wheel A, and carrying at their respective ends bellmouthed guides E E, which form the extremities ofthe guide-frame. The entire guide D D E E is preferably made in a single casting.
My improved hand chain-guide oscillates, as shown in Fig. l, on the center aXis of the hand-chain wheel, but allows the chain to be drawn from the wheel at any angle without binding against the guard or guide.
The effect of the deflection of the chain is to deect the guide to any required position, so as to relieve it of all strain, while the guide causes the chain to hug thewheel closely and keep the same amount of effective chain on the Wheel when itis in any deccted position. It is applicable to any wheel where a hand-chain is used, but specially to portable hoists. It enables the man operating it to keep from under the load. The guide, being adapted to follow the chain without resistance in either direction, is 'always on duty, and protects the hand-chain wheel from danger of breakage or injury, thus constituting a most effective guard to the wheel. i
I am aware that hoisting pulley-blocks have been provided with radial arms, carrying guiderollers at their outer ends to keep the hoisting-chain in place on either side, and hlnged to the shaft independently of each other, so as to have a limited movement. This, therefore, I do not claim.
My'invention is essentially different from that referred to in constituting an effective guide for a hand-chain wheel when in any deflected position, dispensing with the need of grooved guide-pulleys and adapting the handvchain to operate on the wheel as well in de- E E, and having its bearings on a shaft,.C, on,
each side of a hand-chain wheel, A, as shown and described, and` adapted to keep the same amount of effective chain on the Wheel when it is in deflected position.
ALFRED BOX.
Witnesses: V
THEO. DE L. SMITH, WM. A. SMITH.
US225330D Oscillating hand-chain guides Expired - Lifetime US225330A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494676A (en) * 1945-11-26 1950-01-17 Schuur John K Van Der Clamp guide
US2954131A (en) * 1957-08-29 1960-09-27 Cabot Shops Inc Oil well hoist
US20090220319A1 (en) * 2008-02-28 2009-09-03 David Weagle Captive fasteners for bicycle chainguides

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494676A (en) * 1945-11-26 1950-01-17 Schuur John K Van Der Clamp guide
US2954131A (en) * 1957-08-29 1960-09-27 Cabot Shops Inc Oil well hoist
US20090220319A1 (en) * 2008-02-28 2009-09-03 David Weagle Captive fasteners for bicycle chainguides

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