US51742A - Improvement in hoisting-tackle - Google Patents
Improvement in hoisting-tackle Download PDFInfo
- Publication number
- US51742A US51742A US51742DA US51742A US 51742 A US51742 A US 51742A US 51742D A US51742D A US 51742DA US 51742 A US51742 A US 51742A
- Authority
- US
- United States
- Prior art keywords
- block
- clevis
- hoisting
- tackle
- improvement
- 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
- 210000001699 lower leg Anatomy 0.000 description 6
- 210000003128 Head Anatomy 0.000 description 4
- 229910001296 Malleable iron Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 210000000614 Ribs Anatomy 0.000 description 2
- 235000004443 Ricinus communis Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 239000002965 rope 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
Definitions
- Figure 1 represents a sectional side elevation of this intention
- Fig. 2 is a sectional.
- FIG.3 is a detached side elevatiouof the clevis, which is cast int-othedouble block.
- Fig. 4 is a horizontal section of the same, the line a: :0, Fi 3,, indicating the plane of section.
- Fig. 5 1s a the clevis has to-be secured to the center pin, I
- Thisiuveution consists, first, in the con-- struction of a cast-metal block with a suitable wroughbiron or steel hook and clevis connection in such a mannerthata cheap and durable block is obtained, the hook or clevisof which is 'not liable to give way before any of the other parts; also, in forming in the lower end .of the's'iu'gle block a concave seat; for the becket in such amanner that the hoisting-rope can be secured quite close to the sheave, and the largest possible amount of hoistiug-rooui is obtained; finally, in the arrangement of ribsagainst the ends of which the bosses on the" ends of the clevis rests, and thus relieve the center pin partially or wholly of the strain to which the pin is exposed.
- This difiiculty is obviated by my present invention, which relates to a block,-A, to which the clevis B is secured by casting the same as shown in i Figs. 1,3, and 4, said clevis extending down flush with'thc central partiti'omd, of thedou-' ble block, and madeto straddle or. tocatch over thecenter pin,'d, and, if desired, said clevis may be provided with recesses 0; into which the liquid metal runs during the process of casting; and by these-means is firmlyretaiued; or, instead of the recesses, the clevis may be provided with a head'or heads, which will produce'the same effect.
- the clevis B In order to prevent the clevis from workingjloose sidewi'se, it is provided with V-shaped edges, as shown inEig. 4. 'The book G. and the clevis B can, thus be nadeofiwrought-iron or steel and-of any desired streugth,:wh'ile the bodyof the block -is cast off-malleable iron or any other suitable material. This method of securing thecleviskrcfcrs-to double blocks only. v
- This block has a-seat, for the beckct Din its end, formed iii-castings, as shown atf, so that the beckct comes" as close to the center of the sheave as possible, and the largest possible h0isting-room is obtained.
- cast-iron blocks can be made of any desired ,capacityand much lighter than wooden blocks of equal strength
Description
UNIT D STATES ATENT FFtcE.
" J. w. noncnoss, or MIDDLETOWN, oounncrtcc'r.
IMPROVEMENT IN HOlSTlNG-TA'CKLE. v
Specification forming part of Letters Patent No. 5 L742, dated December 26,1865.
.To all when), it may concern:
. Be it known that L'Josnrn W. Noncnoss,
' of Middletown, in thecouutyof Middlesex and .Figure 1 represents a sectional side elevation of this intention Fig. 2 is a sectional.
front elevation of the same; Fig.3 is a detached side elevatiouof the clevis, which is cast int-othedouble block. Fig. 4 is a horizontal section of the same, the line a: :0, Fi 3,, indicating the plane of section. Fig. 5 1s a the clevis has to-be secured to the center pin, I
horizontal section of the single block, taken in the planeiud icated by the line g y, Fig 2. indicate like provided with rihs-g'omt'heir ontersrrrtaees;
Similar letters of reference patts.
Thisiuveution consists, first, in the con-- struction ofa cast-metal block with a suitable wroughbiron or steel hook and clevis connection in such a mannerthata cheap and durable block is obtained, the hook or clevisof which is 'not liable to give way before any of the other parts; also, in forming in the lower end .of the's'iu'gle block a concave seat; for the becket in such amanner that the hoisting-rope can be secured quite close to the sheave, and the largest possible amount of hoistiug-rooui is obtained; finally, in the arrangement of ribsagainst the ends of which the bosses on the" ends of the clevis rests, and thus relieve the center pin partially or wholly of the strain to which the pin is exposed. I
Heretojore castor malleable iron has been employed in the manufacture of small blocks only because the hooks and eyes or other parts thicker than a quarter of an inch cannot very well be annealed, and the blocks could not be increased beyond a certain size, not because the diflerent parts of the shell of the block could not be made strong enough, (that-might have been accomplished without increasing the thickness of the block beyond proper limits,) but because the hook and clevis, on account of their-greater thickness, could not be annealed, and they would consequently be too weak to resist the required pressure. This difiiculty is obviated by my present invention, which relates to a block,-A, to which the clevis B is secured by casting the same as shown in i Figs. 1,3, and 4, said clevis extending down flush with'thc central partiti'omd, of thedou-' ble block, and madeto straddle or. tocatch over thecenter pin,'d, and, if desired, said clevis may be provided with recesses 0; into which the liquid metal runs during the process of casting; and by these-means is firmlyretaiued; or, instead of the recesses, the clevis may be provided with a head'or heads, which will produce'the same effect. In order to preventthe clevis from workingjloose sidewi'se, it is provided with V-shaped edges, as shown inEig. 4. 'The book G. and the clevis B can, thus be nadeofiwrought-iron or steel and-of any desired streugth,:wh'ile the bodyof the block -is cast off-malleable iron or any other suitable material. This method of securing thecleviskrcfcrs-to double blocks only. v
-Wi-th single blocks, such as shown at A,
and in order to relieve said pin from a portion of thestra-iu the checks of the block are which lie parallel withthe shanks of the clevis and prevent it 'from swayiug'to'aud fro, and which come closeup to the bossesjz on the ends of the shanks, as shown particularly in Fig. 2 of the drawings. This block has a-seat, for the beckct Din its end, formed iii-castings, as shown atf, so that the beckct comes" as close to the center of the sheave as possible, and the largest possible h0isting-room is obtained.
By this arrangement cast-iron blocks can be made of any desired ,capacityand much lighter than wooden blocks of equal strength,
and a hoisting-tackle is obtaincd'fwhich is cheap ,.easil y handled, and very durable.
I claim as new and desire to secure by Letters Patent- 1. The clevis B, constructed substantially as described, and combined with the castmetal block A and axispin d,,as explained.
2. Forming the becket-seat into the end of I the block, as and for the purpose specified.
3. The ribs 9 on the checks ofthe blockAj, in combination with the bosses h on the ends of the shanks of the eye, constructed and operatingsubstantially as and for the purpose set forth.
The above specification of v my invent-ion signed by me this 22d day of August, 1865. J." W. NQRCROSS.
Witnesses:
M. M. LmtNcsToN,
G. L. TOPIJIFF.
Publications (1)
Publication Number | Publication Date |
---|---|
US51742A true US51742A (en) | 1865-12-26 |
Family
ID=2121291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US51742D Expired - Lifetime US51742A (en) | Improvement in hoisting-tackle |
Country Status (1)
Country | Link |
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US (1) | US51742A (en) |
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0
- US US51742D patent/US51742A/en not_active Expired - Lifetime
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