US566213A - Pulley-block - Google Patents

Pulley-block Download PDF

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Publication number
US566213A
US566213A US566213DA US566213A US 566213 A US566213 A US 566213A US 566213D A US566213D A US 566213DA US 566213 A US566213 A US 566213A
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Prior art keywords
block
pulley
plates
plate
balls
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/02—Hoists or accessories for hoists
    • B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
    • B66D2700/028—Pulley blocks with multiple sheaves

Definitions

  • My invention is an improvement in pulleyblocks, and especially in the ball-bearin g construction thereof; and the invention consists in certain novel constructions, combinations, and arrangements of parts, as will be hereinafter described, and pointed out in the claim.
  • Figure 1 is a cross-section of a double block provided with my improvements.
  • Fig. 2 is a detail View of the blockframe, the cap-plates, pulleys, and bolts being removed; and
  • Fig. 3 is a sectional view of one of the pulleys.
  • the block shown in Fig. 1 has a framing comprising the main portion A and cap-plates B B.
  • the main portion A has a central plate A, a head-plate A having a loop or eye a and a foot-plate A such plates A and A bein g integral with and united at their middles to the central plate A.
  • the cap-plates B B are secured by screws 19, as shown, or otherwise, and are provided centrally with openings forming seats for the outer ends of the shafts O C. These shafts are fixed with respect to the central plate and are preferably integral therewith.
  • the pulleys E are provided with the central openings e, made at their smallest points larger than the shafts C, so they will not bind or bear against the same.
  • At the opposite ends of said opening e I provide an annular groove or rabbet F, the balls fitting in said rabbets and projecting sufficiently to bear against the shaft and against the frame.
  • the central shaft fixed at one end to the plate of the main frame and fitting at its other end in a seat in the cap-plate, and the loose fitting of the balls in the rabbets of the pulleys forms a simple compact construction, in which the balls can be readily applied and renewed and which will be efficient in use.
  • a central rib extends inward and serves to hold the balls in the opposite rabbets in contact with the framing.
  • the herein-described pulley-block consisting of the main frame portion having a central plate, head and foot plates, and shaftsections integral with and projecting in opposite directions from the said central plate, the pulleys and balls on said shaft-sections, and the cap-plates provided centrally With seats for the outer ends of the shafts and lapped at their ends against and secured to the outer ends of the head and foot plates all substantially as and for the purposes set forth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

G. M. MULLBN.
(No Model.)
PULLEY BLOGK.
Patented Aug. 18, 1896.
a a 3 I e 0 1a z /1 m "k 11v mv 70/2 Gnggofydf Jfldlen.
WITNESSES:
ATTORNEYS.
ATENT FFICE.
GREGORY M. MULLEN, OF BALTIMORE, MARYLAND.
PU LLEY-BLOCK.
SPECIFICATION forming part of Letters Patent No. 566,213, dated August 18, 1896.
Application filed May 29, 1896. Serial No. 593,561. (No model.)
To all whom it may concern.-
Be it known that I, GREGORY M. MULLEN, of Baltimore city, in the State of Maryland, have invented a new and useful Improvement in Pu1ley-Blocks, of which the following is a specification.
My invention is an improvement in pulleyblocks, and especially in the ball-bearin g construction thereof; and the invention consists in certain novel constructions, combinations, and arrangements of parts, as will be hereinafter described, and pointed out in the claim.
In the drawings, Figure 1 is a cross-section of a double block provided with my improvements. Fig. 2 is a detail View of the blockframe, the cap-plates, pulleys, and bolts being removed; and Fig. 3 is a sectional view of one of the pulleys.
The block shown in Fig. 1 has a framing comprising the main portion A and cap-plates B B. The main portion A has a central plate A, a head-plate A having a loop or eye a and a foot-plate A such plates A and A bein g integral with and united at their middles to the central plate A.
The cap-plates B B are secured by screws 19, as shown, or otherwise, and are provided centrally with openings forming seats for the outer ends of the shafts O C. These shafts are fixed with respect to the central plate and are preferably integral therewith.
The pulleys E are provided with the central openings e, made at their smallest points larger than the shafts C, so they will not bind or bear against the same. At the opposite ends of said opening e I provide an annular groove or rabbet F, the balls fitting in said rabbets and projecting sufficiently to bear against the shaft and against the frame.
The central shaft, fixed at one end to the plate of the main frame and fitting at its other end in a seat in the cap-plate, and the loose fitting of the balls in the rabbets of the pulleys forms a simple compact construction, in which the balls can be readily applied and renewed and which will be efficient in use. Between the rabbets F a central rib extends inward and serves to hold the balls in the opposite rabbets in contact with the framing.
Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-
The herein-described pulley-block consisting of the main frame portion having a central plate, head and foot plates, and shaftsections integral with and projecting in opposite directions from the said central plate, the pulleys and balls on said shaft-sections, and the cap-plates provided centrally With seats for the outer ends of the shafts and lapped at their ends against and secured to the outer ends of the head and foot plates all substantially as and for the purposes set forth.
GREGORY Mi. MULLEN. lVitnesses:
P. B. TURPIN, SoLoN 0. KEMoN.
US566213D Pulley-block Expired - Lifetime US566213A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528645A (en) * 1968-04-18 1970-09-15 Peter O Harken Bearing block
US4738032A (en) * 1982-06-07 1988-04-19 Elmer William B Inertial pendulum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528645A (en) * 1968-04-18 1970-09-15 Peter O Harken Bearing block
US4738032A (en) * 1982-06-07 1988-04-19 Elmer William B Inertial pendulum

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