US1422174A - Hoisting tackle - Google Patents

Hoisting tackle Download PDF

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Publication number
US1422174A
US1422174A US521180A US52118021A US1422174A US 1422174 A US1422174 A US 1422174A US 521180 A US521180 A US 521180A US 52118021 A US52118021 A US 52118021A US 1422174 A US1422174 A US 1422174A
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US
United States
Prior art keywords
catch
strap
roller
block
hoisting tackle
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
Application number
US521180A
Inventor
Boettcher Otto John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRED W MAAS
GEO C HUME
Original Assignee
FRED W MAAS
GEO C HUME
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FRED W MAAS, GEO C HUME filed Critical FRED W MAAS
Priority to US521180A priority Critical patent/US1422174A/en
Application granted granted Critical
Publication of US1422174A publication Critical patent/US1422174A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66D3/10—Applications of braking or detent devices

Definitions

  • This invention relates to hoisting tackle in which pulley blocks are used to obtain the necessary power; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed which enable fiat straps or bands to be used in place of the ropes or chains ordinarily used.
  • Figure 1 is a side view of a hoisting tackle constructed according to this invention.
  • Fig. 2 is a view showing the devices turned around one-quarter from the position shown in Fig. 1.
  • Fig. 3 is a detail side view of the automatic catch.
  • Fig. 4 is a front view of the same.
  • the upper block 6 has two parallel side plates 7, and a suspension hook 8.
  • a fiat leather strap 9 is used in place of the usual rope or chain, and fiat bands of other flexible material may also be used.
  • One end of the strap 9 is secured to a crossbar 10, on the upper block, and a roller 12 is journaled on a pin 14 in the upper block for the strap to pass over.
  • the lower block 15 has side plates 16, and a roller 17 is journaled on a pin 18 between the side plates, for the strap to pass under.
  • the block 15 has a lifting hook 19 pivoted on a pin 20 at its lower part, and this hook is preferably a snap hook.
  • This catch 24 is a cam provided with a serrated outer surface, and it is pivoted to the pin by a double-eye 25 which straddles the eye of the lifting hook.
  • the strap 9 passes downwardly from the cross bar 10 under the roller 17, thence up and over the roller 12, and downwardly be tween the catch roller 21 and the catch 24.
  • This tackle is specially adapted for use by linemen in making repairs on telephone and other electric lines, and is used to pull up the wires.
  • the automatic catch enables the lineman to hold the wire under any desired tension in making repairs.
  • the strap is released by first pulling the fall 26 a little downwardly, when the tackle is in the position shown in Fig. 1, so as to turn the catch on its pivot; and then bending the fall upwardly around the periphery of the roller 21, without letting the strap slide backwardly, until the fall is clear of the catch.
  • VYhat I claim is:
  • a tackle comprising a block having a flat-faced roller journaled in it, a second block having two flat-faced rollers arranged tandem and journaled in it, a cam-shaped sustaining catch provided with a double-eye which is pivoted in the second block in line with its two rollers, a lifting member pivoted between the two eyes of the said double-eye, said catch and lifting member being mounted on the same pivot and being independently movable, and a flat operating strap which engages with the said catch and passes over the said. rollers and is secured at one end to the first said block, said catch operating to clamp the strap against one of the rollers of the said second block.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)

Description

0. J. BOETT CHER. HOISTING TACKLE. APPLICATION FILED 050.9, 1921.
Patented July 11, 1922.
OTTO JOHN BOET'ICHER, OF CHILTON, WISCONSIN, ASSIGNOR 0]? TWO-FIFTHS TO FRED W. MAAS AND ONE-FIFTH TO GEO. C. HUME, BOTH 01" CHILTON, WISCONSIN.
HOISTING TACKLE.
Application filed December 9, 1921.
T0 alZ whom it may concern:
Be it known that I, OTTO J. BoETroHER, a citizen of the United States, residing at Chilton, in the county of Calumet and State of Wisconsin, have invented certain new and useful Improvements in Hoisting Tackle, of which the following is a specification.
This invention relates to hoisting tackle in which pulley blocks are used to obtain the necessary power; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed which enable fiat straps or bands to be used in place of the ropes or chains ordinarily used.
In the drawings, Figure 1 is a side view of a hoisting tackle constructed according to this invention. Fig. 2 is a view showing the devices turned around one-quarter from the position shown in Fig. 1. Fig. 3 is a detail side view of the automatic catch. Fig. 4 is a front view of the same.
The upper block 6 has two parallel side plates 7, and a suspension hook 8. A fiat leather strap 9 is used in place of the usual rope or chain, and fiat bands of other flexible material may also be used. One end of the strap 9 is secured to a crossbar 10, on the upper block, and a roller 12 is journaled on a pin 14 in the upper block for the strap to pass over.
The lower block 15 has side plates 16, and a roller 17 is journaled on a pin 18 between the side plates, for the strap to pass under. The block 15 has a lifting hook 19 pivoted on a pin 20 at its lower part, and this hook is preferably a snap hook.
A catch roller 21 of larger diameter than the roller 17, so that the stretches of the strap will not run against each other, is journaled on a pin 22, and is arranged between the roller 17 and the lifting hook, and an automatic catch 24 is pivoted on the pin 20. This catch 24 is a cam provided with a serrated outer surface, and it is pivoted to the pin by a double-eye 25 which straddles the eye of the lifting hook.
Specification of Letters Patent.
Patented July 11, 1922.
Serial No. 521,180.
The strap 9 passes downwardly from the cross bar 10 under the roller 17, thence up and over the roller 12, and downwardly be tween the catch roller 21 and the catch 24.
When the fall 26 is held in the position shown, parallel to the pull of the load, and is slackened, the cam-shaped catch is turned on its pivot pin by contact with the strap, so that the strap is gripped between the catch and the catch roller.
This tackle is specially adapted for use by linemen in making repairs on telephone and other electric lines, and is used to pull up the wires. The automatic catch enables the lineman to hold the wire under any desired tension in making repairs.
The strap is released by first pulling the fall 26 a little downwardly, when the tackle is in the position shown in Fig. 1, so as to turn the catch on its pivot; and then bending the fall upwardly around the periphery of the roller 21, without letting the strap slide backwardly, until the fall is clear of the catch.
VYhat I claim is:
A tackle, comprising a block having a flat-faced roller journaled in it, a second block having two flat-faced rollers arranged tandem and journaled in it, a cam-shaped sustaining catch provided with a double-eye which is pivoted in the second block in line with its two rollers, a lifting member pivoted between the two eyes of the said double-eye, said catch and lifting member being mounted on the same pivot and being independently movable, and a flat operating strap which engages with the said catch and passes over the said. rollers and is secured at one end to the first said block, said catch operating to clamp the strap against one of the rollers of the said second block.
In testimony whereof I have aflixed my signature.
OTTO JOHN BOETTOHER.
US521180A 1921-12-09 1921-12-09 Hoisting tackle Expired - Lifetime US1422174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US521180A US1422174A (en) 1921-12-09 1921-12-09 Hoisting tackle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US521180A US1422174A (en) 1921-12-09 1921-12-09 Hoisting tackle

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US1422174A true US1422174A (en) 1922-07-11

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US521180A Expired - Lifetime US1422174A (en) 1921-12-09 1921-12-09 Hoisting tackle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432043A1 (en) * 1984-08-31 1986-03-13 Werner 6349 Sinn Nickel Lifting device, in particular for medical transport and/or excercise appliances
US20130125871A1 (en) * 2011-11-22 2013-05-23 Maria Alejandra Pirillo Portable device to compress bows
US20140027692A1 (en) * 2012-07-25 2014-01-30 Vale S/A Device for removing hoppers from rail cars

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432043A1 (en) * 1984-08-31 1986-03-13 Werner 6349 Sinn Nickel Lifting device, in particular for medical transport and/or excercise appliances
US20130125871A1 (en) * 2011-11-22 2013-05-23 Maria Alejandra Pirillo Portable device to compress bows
EP2597414A3 (en) * 2011-11-22 2014-12-10 Maria Alejandra Pirillo Portable device to compress bows
US8991372B2 (en) * 2011-11-22 2015-03-31 Maria Alejandra Pirillo Portable device to compress bows
US20140027692A1 (en) * 2012-07-25 2014-01-30 Vale S/A Device for removing hoppers from rail cars
US9284170B2 (en) * 2012-07-25 2016-03-15 Vale S.A. Device for removing hoppers from rail cars

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