US57316A - Improved block-and-tackle check - Google Patents

Improved block-and-tackle check Download PDF

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Publication number
US57316A
US57316A US57316DA US57316A US 57316 A US57316 A US 57316A US 57316D A US57316D A US 57316DA US 57316 A US57316 A US 57316A
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United States
Prior art keywords
block
tackle
lever
check
rope
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Expired - Lifetime
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Classifications

    • 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
    • B66D3/10—Applications of braking or detent devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3936—Pivoted part
    • Y10T24/394—Cam lever
    • Y10T24/3944—Cam engaging or disengaging

Definitions

  • A represents a double block
  • B a single block
  • J the rope or cord, forining, together, the ordinary block and tackle.
  • a metallic box, H Secured to one side of the double block A and the partition which divides the two pulleys in said block is a metallic box, H, said Ibox being open at top and bottom.
  • a lever, E Pivoted in this box H is a lever, E, which will be clearly seen in Figure l.
  • This lever is disk or wheel shaped at that end which is pivoted in the box H, the other end of said lever being loaded or made heavy.
  • the rope J after passing around one of the pulleys ofthe double block, lies with one side in the groove in disk F when the outer end of lever E is sufficiently raised to bring the groove opposite the groove in the pulley.
  • the lever E drops its upper end from the double block A the rope J is caught between the periphery ofthe disk and the groove in the pulley, and, being pressed tightly against the pulley, is prevented from moving through the block.
  • N represents a pin on disk F, which strikes against the block A when lever E is raised a certain height, and prevents its approaching said block nearer than desired.
  • K represents a cord, which is secured at one end to the upper end of lever E, and which, passing over a small pulley, D, on block A, passes down, to be held or used bythe operator in relieving the rope J of pressure when it is desired to have said rope run freely through the blocks.
  • the Weight of the upper end of lever E causes said lever, by gravity', to apply pressure to rope J in stopping the said rope in the block as soon as the operator stops drawing down upon it in operating or using the blocks.
  • lever E constructed substantially as specified, and used in connection with the block A, as and for the purpose set forth.

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

Description

UNITED STATES PATENT OFFICE.
D. O. GUTTRIDGE AND W. F. ROGERS, OF CANTON, OHIO.
IMPROVED BLOCK-AND-TACKLE CHECK.
Specification forming part of Letters Patent No. 57,316, dated August 21, 1866.
To all whom it may concer/1L:
Beit known that We, D. O. GUTTRIDGE and W. F. ROGERS, ofOanton, in the county ot'Stark and State of Ohio, have invented certain new and useful Iniprovcmen ts in Checks for Blocks and Tackle; and we do hereby declare that the following is a full, clear, and exact description ofthe saine, reference being had to the accompanying drawing, and to-the letters of reference marked thereon.
ln the annexed drawing, making part of this specification, A represents a double block, B a single block, and J the rope or cord, forining, together, the ordinary block and tackle.
Secured to one side of the double block A and the partition which divides the two pulleys in said block is a metallic box, H, said Ibox being open at top and bottom. Pivoted in this box H is a lever, E, which will be clearly seen in Figure l. This lever is disk or wheel shaped at that end which is pivoted in the box H, the other end of said lever being loaded or made heavy.
In the disk end F'of the lever E is cut a groove, L. This groove is on the periphery of the disk.
The rope J, after passing around one of the pulleys ofthe double block, lies with one side in the groove in disk F when the outer end of lever E is sufficiently raised to bring the groove opposite the groove in the pulley. When the lever E drops its upper end from the double block A the rope J is caught between the periphery ofthe disk and the groove in the pulley, and, being pressed tightly against the pulley, is prevented from moving through the block.
N represents a pin on disk F, which strikes against the block A when lever E is raised a certain height, and prevents its approaching said block nearer than desired.
K represents a cord, which is secured at one end to the upper end of lever E, and which, passing over a small pulley, D, on block A, passes down, to be held or used bythe operator in relieving the rope J of pressure when it is desired to have said rope run freely through the blocks.
The Weight of the upper end of lever E causes said lever, by gravity', to apply pressure to rope J in stopping the said rope in the block as soon as the operator stops drawing down upon it in operating or using the blocks.
It will thus be seen that the `gravity of the lever stops the blocks, while the cord K is used for relieving the rope and allowing the blocks to operate.
What we claim is- The lever E, constructed substantially as specified, and used in connection with the block A, as and for the purpose set forth.
As evidence that we claim the foregoing we have hereunto set our hands in the presence of two Witnesses.
D. C. GUTTRIDGE. W. F. ROGERS.
Witnesses:
JOHN HERsHEY, GEO. W. RAFF.
US57316D Improved block-and-tackle check Expired - Lifetime US57316A (en)

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US57316A true US57316A (en) 1866-08-21

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US57316D Expired - Lifetime US57316A (en) Improved block-and-tackle check

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980401A (en) * 1959-09-22 1961-04-18 Beatrice L Mccormick Cable block

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980401A (en) * 1959-09-22 1961-04-18 Beatrice L Mccormick Cable block

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