US430518A - Snatch-block - Google Patents
Snatch-block Download PDFInfo
- Publication number
- US430518A US430518A US430518DA US430518A US 430518 A US430518 A US 430518A US 430518D A US430518D A US 430518DA US 430518 A US430518 A US 430518A
- Authority
- US
- United States
- Prior art keywords
- link
- block
- head
- snatch
- cheek
- 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
- 210000003128 Head Anatomy 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 239000002965 rope Substances 0.000 description 8
- 210000001699 lower leg Anatomy 0.000 description 4
- 210000003467 Cheek Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 235000013601 eggs Nutrition 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000002023 wood 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
- a and b represent the clieelcpieces, and c represents the end piece of the block, said parts being made of wood or metal, according to the construction of the snatch-block.
- a and B represent the metal straps, which may be secured to the cheek-pieces a and b, and formed at their upper ends with eyes A and B. They are preferably, however', made, as shown in Figs. 4, 5, and 6, in the form of bow-straps, in which case the cheek-pieces are inclosed within the same, a space being left between the upper ends of the metal straps and the ends of the cheek-pieces to form the eyes A and B.
- A' and B are eyes or loops at the upper ends of the respective metal straps A and B, as shown.
- D represents the sheave, as usual, journaled on the pin or spindle d, that passes throughthe perforations in t-he straps A B and cheek-pieces a Z), as shown.
- E is a metal link pivoted in itslower end to the bow or eye B of the strap B, said link being pivoted in its upper end to the head F, as shown.
- f is the hook or bail, the shank of which is journaled to and riveted in a perforation in the head F, as is common in snatch-blocks.
- the head F has in one end ahorizontal shank or trunnion F', terminating as a T-head F extending vertically above and below said trunnion F as shown.
- the metal link G having a slot g in its upper end, as shown, said slot being of a width equal to or a little wider than the diameter of the trunnion F', and of a length equal to or a little less than the length of the T-head F, so as to prevent the accidental unlocking or detachment of the head F and its flanged trunnion from the said slotted link G.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Description
(No Model.) 2 Sheets-Sheet l.
T. R. FERRALL.
SNATGH BLOCK. No. 430,518; Patented June 17, 1890.
Egg
r (No Model.) 2 Sheets-Sheet. 2.
T. R. PBRRALL.
SNATGH BLOCK.
No. 430,518. lPaten'eHJune 17. 1890.
UNITED STATES v PATENT OEEIcE.
THOMAS R. FERRALL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE VBOSTON da LOCKPORT BLOCK COMPANY, OF NEW JERSEY.
SNATCHMBLOCK.
SPECIFICATION forming part of Letters Patient No. 430,518, dated June 1'?, 1890.
Application led September 2l, 1888. Serial No. 285,963. (No model.)
To a/ZZ whom, t may concern.-
Be it known that I, THOMAS R. FEERALL, a citizen of the United States, and aresident of Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Snatch-Blocks, of which the following, taken in connection with the accompanying drawings, is a speci fication.
This invention relates to improvements in snatch-blocks, and it is carried out as follows, reference beingV had to the accompanying drawings, wherein- Figure 1 represents a front view, Fig. 2 a rear View, and Fig. 3 a longitudinal section, of an all-metal snatch-block made according to myinvention. Figs. 4t, 5, and 6 represent corresponding views of the improved snatchblock made with Wooden cheek-pieces.
Similar letters refer to similar parts wherever they occur on the different parts of the drawings.
a and b represent the clieelcpieces, and c represents the end piece of the block, said parts being made of wood or metal, according to the construction of the snatch-block.
A and B represent the metal straps, which may be secured to the cheek-pieces a and b, and formed at their upper ends with eyes A and B. They are preferably, however', made, as shown in Figs. 4, 5, and 6, in the form of bow-straps, in which case the cheek-pieces are inclosed within the same, a space being left between the upper ends of the metal straps and the ends of the cheek-pieces to form the eyes A and B.
A' and B are eyes or loops at the upper ends of the respective metal straps A and B, as shown.
D represents the sheave, as usual, journaled on the pin or spindle d, that passes throughthe perforations in t-he straps A B and cheek-pieces a Z), as shown.
E is a metal link pivoted in itslower end to the bow or eye B of the strap B, said link being pivoted in its upper end to the head F, as shown.
f is the hook or bail, the shank of which is journaled to and riveted in a perforation in the head F, as is common in snatch-blocks. The head F has in one end ahorizontal shank or trunnion F', terminating as a T-head F extending vertically above and below said trunnion F as shown.
To the loop or eye A of the metal strap A is pivoted the metal link G, having a slot g in its upper end, as shown, said slot being of a width equal to or a little wider than the diameter of the trunnion F', and of a length equal to or a little less than the length of the T-head F, so as to prevent the accidental unlocking or detachment of the head F and its flanged trunnion from the said slotted link G.
lVhen it is desired to unlock the headF from the link G in placing a rope on the sheave D, the head is swung to the position shown in dotted lines in Fig. 3, and the slotted link G is swung outward to the position shown in dotted lines in said iigure, after which the said link may be swung freely outward, as shown in dotted lines in Fig. 6,suffi ciently to enable the rope to be placed within the block and around the sheave D. After the rope is laid around the sheave the slotted link G is swung backward over the T-headed flange F", and the latter locked in position to said link, as shown in t-he drawings.
With my device all thatis necessary to do is to turn the hook and its head and the slotted link in the same direction for the purpose of disengaging one from the other or locking them together after the rope is put on the sheave.
Vith my invention the greatest safety possible is obtained, as the head Fcannot under any circumstances be detached from the slotted link G unless the parts mentioned are carefully manipulated by the operator in the manner as above described.
lVhat I wish to secure by Letters Patent, and claim, is-
1. ln a snatch-block, the combination, with the cheeks d and b, end piece c, sheave D, and the metal straps A and B, provided with eyes A and B', of the link E, pivoted in the eye B, the head F, connected with said link, the trunnion F', vertical T-head F", and the slotted link G, pivoted in the eye A and adapted to engage the trunnion F', substantially as described.
2. The combination, in a snatch-block, with IOO the cheek-pieces a and b and the link E, pivname to this specification, in the presence of oted in one end of the cheek-piece b, of lshe two subsoribingwitnesses,on this 20th day of xo head F, connected with said link, and. means September A. D., 1888.
for locking it to the opposite cheek-piece a, 1 q 5 consisting of the pivoted slotted link G, trun- 'lHOMAb R' FERRALL nion F', and vertical T-head F, substan- Vtnesses: tially as described. ALBAN ANDRN,
In testimony whereof I have signed. my SELINA R. SCHELIN.
Publications (1)
Publication Number | Publication Date |
---|---|
US430518A true US430518A (en) | 1890-06-17 |
Family
ID=2499425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US430518D Expired - Lifetime US430518A (en) | Snatch-block |
Country Status (1)
Country | Link |
---|---|
US (1) | US430518A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9717226B1 (en) * | 2010-03-18 | 2017-08-01 | Craig Mercier | Outrigger line management system |
-
0
- US US430518D patent/US430518A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9717226B1 (en) * | 2010-03-18 | 2017-08-01 | Craig Mercier | Outrigger line management system |
US11589566B1 (en) * | 2010-03-18 | 2023-02-28 | Craig Mercier | Outrigger line management system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US430518A (en) | Snatch-block | |
US1428118A (en) | Snatch block | |
US430519A (en) | Snatch-block | |
US1047291A (en) | Car-stake fastener. | |
US200159A (en) | Improvement in boat-detaching apparatus | |
US610172A (en) | Pulley-block | |
US171413A (en) | Improvement in ice-tongs | |
US1206565A (en) | Bumper-block. | |
US259576A (en) | Peters | |
US1020650A (en) | Load-binder. | |
US328350A (en) | Self-adjusting chain sling | |
US689090A (en) | Block. | |
US524403A (en) | Hoist | |
US264143A (en) | Snatch-block | |
US1179665A (en) | Safety-handhold. | |
US5147A (en) | Fendek fob canal-boats | |
US426308A (en) | Device for handling cane | |
US66105A (en) | Improved boat-detaching tackle | |
US494873A (en) | Snatch-block | |
US1232417A (en) | Safety butt-hook. | |
US465775A (en) | Mechanism for doubling up the purchase of hoist-ropes | |
US408814A (en) | Pulley-block | |
US666909A (en) | Ship's davit. | |
US271484A (en) | Cleat | |
US586316A (en) | Boat-detaching device |