US160534A - Improvement in tackle-blocks - Google Patents
Improvement in tackle-blocks Download PDFInfo
- Publication number
- US160534A US160534A US160534DA US160534A US 160534 A US160534 A US 160534A US 160534D A US160534D A US 160534DA US 160534 A US160534 A US 160534A
- Authority
- US
- United States
- Prior art keywords
- tackle
- blocks
- rollers
- improvement
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000002965 rope Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
Images
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
Definitions
- My invention relates to means for reducing the friction, at the same time strengthening the block; and consists in a novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a simpler, cheaper, and more effective device of this character is produced than is now in ordinary use.
- Fig. 1 represents a double mortise-block, with that portion of its outer shell between the lines m as, Fig. 2, removed; and B, metallic plates, which are firmly riveted to the sides of the mortises by the rivets 0 c 0.
- Three concaved rollers, d d d, are arranged in the arc of a circle in the mortise, being journaled in the plates B, and under and in contact with the central roller 01 are two convex supporting-rollers, e 0, also journaled in the plates B, and arranged in respect to the rollers 61 d, as shown.
Description
G. MARTIN.
Tackle-Block.
N0. 16$),534 Pa tented Much 9,1875.
@Z PM 1%? I THE GRAPHIC GOJ'HOTO rLlTH-39 & 4-1 PARK PLACE, NY.
NITED STATES PATENT Ormon.
GRATIN MARTIN, OF LYNN, ASSIGNOR OF ONE-HALF HIS RIGHT TO ROBERT MGINTYRE, OF EVERETT, MASSACHUSETTS.
IMPROVEMENT IN TACKLE-BLOCKS.
Specification forming part of Letters Patent No. 160,534, dated March 9, 1875; application filed December 4, 1874.
To all whom it may concern:
Be it known that I, GRATIN ll/IARTIN, of Lynn, in the county of Essex, State of Massachusetts, have invented a certain new and useful Improvement in Tackle-Blocks, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which my invention appertains to make and use the same, reference being bad to the accompanying drawing forming a part of this specification, in which- Figure l is a sectional perspective view, and Fig. 2 a side elevation.
Likeletters of reference indicate corresponding parts in the different figures of the draw- 111g.
My invention relates to means for reducing the friction, at the same time strengthening the block; and consists in a novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a simpler, cheaper, and more effective device of this character is produced than is now in ordinary use.
In the drawing, Fig. 1 represents a double mortise-block, with that portion of its outer shell between the lines m as, Fig. 2, removed; and B, metallic plates, which are firmly riveted to the sides of the mortises by the rivets 0 c 0. Three concaved rollers, d d d, are arranged in the arc of a circle in the mortise, being journaled in the plates B, and under and in contact with the central roller 01 are two convex supporting-rollers, e 0, also journaled in the plates B, and arranged in respect to the rollers 61 d, as shown.
The plates B greatly strengthen the block, and prevent it from splitting, while the rollers e e, by afi'ordin g support to the other rollers, render it feasible to dispense with the ordi= nary pulleys or sheaves without increasing the friction, at the same time bringing the path of the rope nearer the center of the block, and rendering it less liable to cant or choke.
I am aware that a sheave or pulley has been used in a tackle-block, having a series of friction-rollers arranged around its axis, and do not claim the same, my invention being essentially different from such a device; but,
Having thus described my invention, what I claim is- In a tackle-block, the concave rollers d d d and convex rollers c 0, combined and arranged to operate substantially as and for the purpose specified.
GRATIN MARTIN. Witnesses:
G. A. SHAW, H. E. METOALF.
Publications (1)
Publication Number | Publication Date |
---|---|
US160534A true US160534A (en) | 1875-03-09 |
Family
ID=2229943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US160534D Expired - Lifetime US160534A (en) | Improvement in tackle-blocks |
Country Status (1)
Country | Link |
---|---|
US (1) | US160534A (en) |
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0
- US US160534D patent/US160534A/en not_active Expired - Lifetime
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