US79264A - Improvement in pulley-blocks - Google Patents
Improvement in pulley-blocks Download PDFInfo
- Publication number
- US79264A US79264A US79264DA US79264A US 79264 A US79264 A US 79264A US 79264D A US79264D A US 79264DA US 79264 A US79264 A US 79264A
- Authority
- US
- United States
- Prior art keywords
- pulley
- sleeve
- blocks
- shaft
- 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
- 239000002965 rope Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/26—Rope, cable, or chain winding mechanisms; Capstans having several drums or barrels
Definitions
- PATENT HENRY F. SHAW OF WEST ROX-BURY, ASSIGNOR TO JAMES A. WOODBU] AND SOLOMON S. GRAY, OF BOSTON, MASSACHUSETTS.
- the object of my invention is to produce a pulley-block which will be very simple in its construction, eii'ective in operation, and capable of sustaining aweight at any desired height without the aid of a ratchet and pawl orl any other holding device, and also to dispense with thev use of a lower or 'secondary sheath.
- my invention consists in the application to the construction of a pulleyblock of a differential gear, as described in a patent granted to me March 10, 1868, and num l. bered 7 5,304, in which two wheels, having, re-
- an external and internal'gear are hung eccentrically upon a shaft, which is free to revolve independently of either gear.
- the gears are arranged upon an eccentric-sleeve,y which is keyed to the shaft that passesl into or is journaled in the two sides or frame of a pulley- Upon the same shaft that bears the eccentric-sleeve is secured the winding-wheel, by -which the shaft and eccentric are rotated.
- A representsi frame of la pulley-block, provided with '1 ⁇ swiveled hook B.
- O represents a shaft orb passing through or hun g in, the sides of i frame.
- c sisting 'of a cylindrical portion, 1, upon whi is secured the winding-wheel D, carrying t rope h. 2 and 3 are eccentrics formed on c posite sides of the sleeve.
- the ends of t' ropes, e and f are attached, respectively, the pulleys E and F, and the other ends the swiveled hook G, that sustains the weig H.
- the pulley E carries theinternal and t pulley F the external gear.
- the collar is made separate from the actu: ing-shaft, so as to admit 'of its being easily i serted between the sides of the pulley-blo frame.
Description
" block.
PATENT HENRY F. SHAW, OF WEST ROX-BURY, ASSIGNOR TO JAMES A. WOODBU] AND SOLOMON S. GRAY, OF BOSTON, MASSACHUSETTS.
INI PROVE'M ENT IN PU LLEY-BLOCKS.
To alljwhom fit may concern:
' Be it known that I, HENRY F. SHAW, `of West Roxbury, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Pulley-Blocks, of which the following is a full, clear, and exact description, reference being had to the acco1npanying drawings, making a partof this speciiivcation, in which- Figure l represents a perspective view of a pulley-block embodying my invention. Fig. 2 is a transverse vertical section of the saine, and Fig. 3 is a section on the line w y of Fig. 2. Fig. 4 is an end view of the eccentricsleeve.
The object of my invention is to produce a pulley-block which will be very simple in its construction, eii'ective in operation, and capable of sustaining aweight at any desired height without the aid of a ratchet and pawl orl any other holding device, and also to dispense with thev use of a lower or 'secondary sheath.
The nature of my invention consists in the application to the construction of a pulleyblock of a differential gear, as described in a patent granted to me March 10, 1868, and num l. bered 7 5,304, in which two wheels, having, re-
spectively, an external and internal'gear, are hung eccentrically upon a shaft, which is free to revolve independently of either gear.
lIn my present invention the gears are arranged upon an eccentric-sleeve,y which is keyed to the shaft that passesl into or is journaled in the two sides or frame of a pulley- Upon the same shaft that bears the eccentric-sleeve is secured the winding-wheel, by -which the shaft and eccentric are rotated.
To the pulleys connected with the gears are attached .cords or ropes, which sustain the weight to be lifted, one end being attached to the pulley connected to the internal, and the other to that connected to the external gear, so that, as the eccentric-sleeve is rotated, the pulleys will act mutually as buttresses, and
thus overcome any resistance offered to the tendency to relative motion.
Both pulleys being free upon the actuati sleeve or shaft, and the two ropes drawing opposite directions, a perfect equilibrium tension is maintained.
Referring to the dra-wings, A representsi frame of la pulley-block, provided with '1 `swiveled hook B. O represents a shaft orb passing through or hun g in, the sides of i frame. On the shaft G placed a sleeve, c sisting 'of a cylindrical portion, 1, upon whi is secured the winding-wheel D, carrying t rope h. 2 and 3 are eccentrics formed on c posite sides of the sleeve. The ends of t' ropes, e and f, are attached, respectively, the pulleys E and F, and the other ends the swiveled hook G, that sustains the weig H. The pulley E carries theinternal and t pulley F the external gear.
Upon putting the driving-wheel in moti by pulling the rope h, the eccentric-sleeve w be rotated, and as the two gears moven( pendently of the eceentric-sleeve,. and are sisted in their lmotion by an equal force, th will revolve slowly in opposite directions, a thus Wind up the cords that sustain the weig to be raised.
The collar is made separate from the actu: ing-shaft, so as to admit 'of its being easily i serted between the sides of the pulley-blo frame.
Having thus described my invention, wh I claim as new, and desire to secure by Li ters Patent, is
' Thev combination, in` a vWilley-block, of t windingwheel D, the differential gear, pulle E F, and an eccentric-sleeve, substantially and for lthe purpose set forth.
In testimony whereof I have signed my nai to this specification in the presence of two su 'scribingwitnesses HENRY F. SHAW.
Witnesses:
J H. ADAMS, E. L. DYER.
Publications (1)
Publication Number | Publication Date |
---|---|
US79264A true US79264A (en) | 1868-06-23 |
Family
ID=2148762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US79264D Expired - Lifetime US79264A (en) | Improvement in pulley-blocks |
Country Status (1)
Country | Link |
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US (1) | US79264A (en) |
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0
- US US79264D patent/US79264A/en not_active Expired - Lifetime
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