US264143A - Snatch-block - Google Patents
Snatch-block Download PDFInfo
- Publication number
- US264143A US264143A US264143DA US264143A US 264143 A US264143 A US 264143A US 264143D A US264143D A US 264143DA US 264143 A US264143 A US 264143A
- Authority
- US
- United States
- Prior art keywords
- block
- snatch
- hook
- rope
- piece
- 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
- 239000002965 rope Substances 0.000 description 14
- 210000003128 Head Anatomy 0.000 description 8
- 210000001699 lower leg Anatomy 0.000 description 2
- 239000002184 metal Substances 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
- B66D3/046—Openable pulley blocks
Definitions
- This invention relates to improvements in snatch-blocks; and it is carried out as follows,
- FIG. 1 represents a side view showing the block in a locked position.
- Fig. 2 represents a side View showing the block as unlocked, in aposition for receiving the rope; and
- Fig. 3 represents a central. longitudinal section on the line A B shown in Fig. 1.
- a and 11 represent the sides of the block, and 0 represents the lower connecting-piece between said sides, as usual.
- d is the hook, as usual, having its shank secured to and made to swivel in the head at, one endof which is journaled to the metal eye 0, which is extended downward on the outside and inside of the block-piece a as an inside strap, 6, and outside strap, 6, as shown in the drawings.
- the hook or catch (1"
- the lower end of which is adapted to hook and lock into the eyefin the upper end of the block-piece b, the latter being made somewhat shorter than the opposite side piece, a, so as to allow the rope to be placed on the sheave y when the hooks d d are turned to the position shown in Fig. 2.
- the eyef forms the upper termination of the outside and inside straps, ff, which latter pass downward on the outside and inside of the shorter block-piece b, as shown.
- g is the spindle, on which the sheave 9 revolves loosely, said spindle passing through the sides a b, as well as the outside and inside straps, e clff, and is riveted in its outer ends.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
- Ropes Or Cables (AREA)
Description
(No Model.) Q
T. R. FERRALL. SNATGH BLOCK. No. 264,143. Patented Sept. 12, 1882.
' %MWW JJM 23w M 4 UNITED STATES PATENT OFFICE.
THOMAS E. FERRALL, OF BOSTON, MASSACHUSETTS.
SNATCH-BLOCK.
SPECIFICATION forming part of Letters Patent No. 264,143, dated September 12, 1882. Application filed July 3, 1882. (No model.)
To all whom it may concern:
Be it known that I, THOMAS E. FERRALL, a citizen of the United States, residing at Boston, in the county of Suflolk and State of Massachusetts, have invented certain new and useful Improvements in Snatch-Blockspand I do hereby declare that the same are fully described in the following specification and Hills trated in the accompanying drawings.
This invention relates to improvements in snatch-blocks; and it is carried out as follows,
reference being had to the accompanying drawings, in which- Figure 1 represents a side view showing the block in a locked position. Fig. 2 represents a side View showing the block as unlocked, in aposition for receiving the rope; and Fig. 3 represents a central. longitudinal section on the line A B shown in Fig. 1.
Similar letters refer to similar parts wherever they occur on the different parts of the drawings.
a and 11 represent the sides of the block, and 0 represents the lower connecting-piece between said sides, as usual.
d is the hook, as usual, having its shank secured to and made to swivel in the head at, one endof which is journaled to the metal eye 0, which is extended downward on the outside and inside of the block-piece a as an inside strap, 6, and outside strap, 6, as shown in the drawings. To the opposite end of the head d is secured or made in one piece with it the hook or catch (1", the lower end of which is adapted to hook and lock into the eyefin the upper end of the block-piece b, the latter being made somewhat shorter than the opposite side piece, a, so as to allow the rope to be placed on the sheave y when the hooks d d are turned to the position shown in Fig. 2. The eyefforms the upper termination of the outside and inside straps, ff, which latter pass downward on the outside and inside of the shorter block-piece b, as shown.
' his a bolt or rivet passingthrough the lower ends ofthe straps ef, side pieces, a b, and middle piece, 0, by which arrangement all the said parts are firmly secured together, as shown.
g is the spindle, on which the sheave 9 revolves loosely, said spindle passing through the sides a b, as well as the outside and inside straps, e clff, and is riveted in its outer ends.
In snatch-blocks heretofore made a hinged link has been used to close the block when in use; but such link is objectionable on account ofits liability to he accidentally left open when the block is in use, and thus cause the block to break by the strain of the rope thereon; and this is entirely avoided with my invention, for should the block be left open it will be automatically closed by the tension of the rope thereon, and remain in such locked position until unlocked by the operator in charge.
It will be seen by reference to the drawings that, as the hooks d d are rigidly attached to each other and in a line with each other and adapted to swing together on a common fulcrum, the block cannot remain open when the rope is in it and a tension brought to bear on the rope and a strain on the upper hook, (I, but is instantly and automatically closed the moment a strain is brought to bear on the hook 01, causing it to turn on its fulcrum, and with it the hook at swings to look into the eye as shown and described. The rope is laid within the block by turning the hooks d d to the position shown in Fig. 2.
What I wish to secure by Letters Patent, and claim, is-
A snatch-block having outside and inside straps, e eff, secured to the block a b c at its bottom by means of a bolt or rivet, h, in combination with the hinged head d,journaled to the eye a, the swivel-hook d, and the selflocking hook or catch d, secured to the head d and adapted to look into the eyef, as and for the purpose set forth and described.
In testimony whereofl have afiixed my sig nature in presence of two witnesses.
THOMAS R. FERRALL. Witnesses:
ALBAN ANDREN, HENRY GHADBOURN.
Publications (1)
Publication Number | Publication Date |
---|---|
US264143A true US264143A (en) | 1882-09-12 |
Family
ID=2333410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US264143D Expired - Lifetime US264143A (en) | Snatch-block |
Country Status (1)
Country | Link |
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US (1) | US264143A (en) |
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0
- US US264143D patent/US264143A/en not_active Expired - Lifetime
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