US2665012A - Wire lifting crane - Google Patents

Wire lifting crane Download PDF

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Publication number
US2665012A
US2665012A US72122A US7212249A US2665012A US 2665012 A US2665012 A US 2665012A US 72122 A US72122 A US 72122A US 7212249 A US7212249 A US 7212249A US 2665012 A US2665012 A US 2665012A
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Prior art keywords
boom
crane
pin
notches
wire
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US72122A
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Mclain Ray
Theodore A Fornkahl
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
    • B66C23/203—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided by posts, e.g. scaffolding, trees or masts

Definitions

  • This invention relates to a wire lifting crane for use on power distribution poles. More specifically it relates to a crane of the kind described having a boom which is pivoted for motion in a vertical plane.
  • An object of the invention is to provide a crane which can be mounted either at the top of a pole or on a cross-arm.
  • Another object of the invention is to provide a crane having a boom pivoted for limited pivotal motion in a vertical plane.
  • Still another object of the invention is to provide a crane having a boom which is rotatable about a vertical axis so that it can be utilized with either of two sets of positioning notches.
  • Yet another object is to provide a crane which is simple yet rugged.
  • a further object is to provide a crane which can be tilted from a position in which the wire being lifted will clear the pole to one in which the wire lifted will be positioned over the insulator to which it is to be fastened.
  • Yet a further object of the invention is to provide suitable means for supporting the crane on a pole.
  • Figure l is a side elevation of the crane mounted on a cross-arm.
  • Figure 2 is an end elevation of the apparatus of Figure I viewed from the left thereof.
  • Figure 3 is a view partly in section showing the lower portion of the boom.
  • Figure 4 is a side elevation of the crane mounted at the top of a pole.
  • Figure 5 is an end elevation of the crane showing a modified form of cross arm mounting means.
  • the numeral I refers to a cross-arm having an insulator 3 mounted thereon.
  • the crane comprises a channel shaped base 5 which is open downwardly and is proportioned so as to fit the top edge of a cross-arm.
  • a pair of hooks i extend laterally from the top of the base to support the chains 9 and II which are connected by a toggle clamp mechanism I3 of conventional construction.
  • each sector Fixed to the upper face of the base are a pair of parellel, spaced sector plates I5 which are spanned by a back plate I'I. Each sector has spaced notches l9 and 2
  • Claim. (Cl. 212-8) A pivot pin 25 is fixed in thesectors and a bearing or support member 27 is pivoted on the pin.
  • the member has two guide portions 29, 3
  • the boom is preferably a tube formed with a downwardly curved upper end 3'1 which terminates in an eye 39 which receives a pulley block 4
  • the lower end of the tube is notched at 43 to receive the pin 25 and slidably receives the guide portions 29, 3
  • a pair of pins 45 are fixed in the tube and extend radially into the groove 33. When the notches 53 rest on the pin 25, the pins 55 rest at the bottom of the groove. This permits the boom to be lifted far enough to disengage the notches and pin.
  • a rope or other line 4? is supported in the block and a hook 43 may be fastened to one end thereof to lift the power wire 5
  • Another pin 53 is fixed in the boom above the pins 45 and extends from each side of the tube. The pin is positioned so that it is seated in the notches I9 when the lower notches 43 engage pin 25.
  • the crane is mounted with the base 5 spanning the upper side of the cross-arm and suitable links of the chains 9 and II are engaged with, hooks I and with the toggle clamp I3.
  • the clamp is closed, the chain is tightened so as to hold the base firmly on the arm.
  • Modified clamp ( Figure 5) Instead of using the chain to clamp the crane on a cross-arm I may turn up the lower edges of the base to form channels 59.
  • has hooks 63 formed at the ends thereof to enter and interlock with the channels.
  • a base In a crane, the combination of a base, clamping means for detachably mounting said base on a supporting means, a support member having axially aligned and axially spaced cylindrical guide portions, a tubular boom having a longitudinal axis, said boom having one end mounted on said guide portions for rotation and for axial translation thereon to and from a normal position, means on said boom extending into the space between said guide portions for engaging them to limit the axial translation of the boom, apivot pin engaging said base and support member and cooperating therewith to mount said boom for movement through an arc in a plane which intersects said base, means defining diametrically opposed, axially directed notches in the end of the boom, said notches and pivot pin being engaged when said boom occupies its normal axial position and serving to hold the boom in one or the other of two rotated positions, the other end of said boom being offset from said axis, a pulley, means for mounting said pulley on said other end of the boom, stop engaging means mounted on said boom

Description

Jan. 5, R McLAlN r WIRE LIFTING CRANE 2 Sheets-Sheet l Filed Jan. 22, 1949 RAY 0 Am THEODORE A. FBRNKAHL I INVENTOR.
ATTORNEY 1954 R. M LAIN ETAL 2,665,012
WIRE LIFTING CRANE Filed Jan. 22, 1949 2 Sheets-Sheet 2 Rmr Mc Lam.
INVEN TOR.
BYW%W ATTbRNEY THEODORE H. FORNKAHL Patented Jan. 5, 1954 OFFICE WIRE LIFTING CRANE Ray McLain and Theodore A. Fornkahl, Cape Girardeau, Mo.
Application January 22, 1949, Serial No. 72,122
This invention relates to a wire lifting crane for use on power distribution poles. More specifically it relates to a crane of the kind described having a boom which is pivoted for motion in a vertical plane.
An object of the invention is to provide a crane which can be mounted either at the top of a pole or on a cross-arm.
Another object of the invention is to provide a crane having a boom pivoted for limited pivotal motion in a vertical plane.
Still another object of the invention is to provide a crane having a boom which is rotatable about a vertical axis so that it can be utilized with either of two sets of positioning notches.
Yet another object is to provide a crane which is simple yet rugged.
A further object is to provide a crane which can be tilted from a position in which the wire being lifted will clear the pole to one in which the wire lifted will be positioned over the insulator to which it is to be fastened.
Yet a further object of the invention is to provide suitable means for supporting the crane on a pole.
These and other objects will become apparent from a study of this specification and the drawings which are attached hereto and made a part hereof and in which:
Figure l is a side elevation of the crane mounted on a cross-arm.
Figure 2 is an end elevation of the apparatus of Figure I viewed from the left thereof.
Figure 3 is a view partly in section showing the lower portion of the boom.
Figure 4 is a side elevation of the crane mounted at the top of a pole.
Figure 5 is an end elevation of the crane showing a modified form of cross arm mounting means.
Referring now to Figures 1 to 3, the numeral I refers to a cross-arm having an insulator 3 mounted thereon.
The crane comprises a channel shaped base 5 which is open downwardly and is proportioned so as to fit the top edge of a cross-arm. A pair of hooks i extend laterally from the top of the base to support the chains 9 and II which are connected by a toggle clamp mechanism I3 of conventional construction.
Fixed to the upper face of the base are a pair of parellel, spaced sector plates I5 which are spanned by a back plate I'I. Each sector has spaced notches l9 and 2|. The corresponding notches in the plates are aligned.
1 Claim. (Cl. 212-8) A pivot pin 25 is fixed in thesectors and a bearing or support member 27 is pivoted on the pin. The member has two guide portions 29, 3| which are separated by a groove 33.
The boom is preferably a tube formed with a downwardly curved upper end 3'1 which terminates in an eye 39 which receives a pulley block 4| The lower end of the tube is notched at 43 to receive the pin 25 and slidably receives the guide portions 29, 3|. A pair of pins 45 are fixed in the tube and extend radially into the groove 33. When the notches 53 rest on the pin 25, the pins 55 rest at the bottom of the groove. This permits the boom to be lifted far enough to disengage the notches and pin.
A rope or other line 4? is supported in the block and a hook 43 may be fastened to one end thereof to lift the power wire 5|.
Another pin 53 is fixed in the boom above the pins 45 and extends from each side of the tube. The pin is positioned so that it is seated in the notches I9 when the lower notches 43 engage pin 25.
Operation The crane is mounted with the base 5 spanning the upper side of the cross-arm and suitable links of the chains 9 and II are engaged with, hooks I and with the toggle clamp I3. When the clamp is closed, the chain is tightened so as to hold the base firmly on the arm.
With the boom in the position shown in Figure 1, the hook 49 is lowered to the ground and engaged with a wire. The wire is then lifted until it is slightly higher than the insulator 3. The boom of the crane is then swung toward the dotted line position (Figure 1 until the Wire is directly over the insulator upon which it is then lowered.
The pin 53 engages the ends of the notches I9 to limit the pivotal movement of the boom.
When it is desired to use the crane to mount a wire on an insulator 55 which is supported on top of a pole 51, the base is clamped to the side of the pole by means of chains 9, II and toggle clamp I3. Thereafter the boom is slid outwardly on the support guides, away from pin 25. This disconnects notches 43 from pin 25 and pin 53 from notches I9.
The boom (Figure 4) is then rotated degrees on guides 29, 3| and rotated about pin 25 until pin 53 is adjacent notches 2|. The boom is then slid toward pin 25 to reengage it with notches 43 and pin 53 with notches 2|.
3 Operation of the device in this position is similar to that previously described.
Modified clamp (Figure 5) Instead of using the chain to clamp the crane on a cross-arm I may turn up the lower edges of the base to form channels 59. A U-shaped clamp 6| has hooks 63 formed at the ends thereof to enter and interlock with the channels.
A threaded hub 65 is fixed to the center portion of the clamp and a hand screw 61 is mounted therein.
The application of the clamp is obvious.
It is obvious that various changes may be made in the form, structure and arrangement of parts without departing from the spirit of the invention. Accordingly, applicant does not desire to be limited to the specific embodiment disclosed herein primarily for purposes of illustration; but instead, he desires protection falling fairly within the scope of the appended claim.
What I consider to be new and desire to protect by Letters Patent of the United States is:
In a crane, the combination of a base, clamping means for detachably mounting said base on a supporting means, a support member having axially aligned and axially spaced cylindrical guide portions, a tubular boom having a longitudinal axis, said boom having one end mounted on said guide portions for rotation and for axial translation thereon to and from a normal position, means on said boom extending into the space between said guide portions for engaging them to limit the axial translation of the boom, apivot pin engaging said base and support member and cooperating therewith to mount said boom for movement through an arc in a plane which intersects said base, means defining diametrically opposed, axially directed notches in the end of the boom, said notches and pivot pin being engaged when said boom occupies its normal axial position and serving to hold the boom in one or the other of two rotated positions, the other end of said boom being offset from said axis, a pulley, means for mounting said pulley on said other end of the boom, stop engaging means mounted on said boom, said stop engaging means being moved in a predetermined path as said boom moves through its arc while occupying said normal axial position and being moved out of said path when said boom is displaced from said normal axial position, and a series of stop means mounted on said base and disposed at spaced points along the path of and for engagement with said stop engaging means, said stop means and stop engaging means serving to limit the pivotal motion of said boom to any selected one of a number of segments of its pivotal arc.
RAY MCLAIN. THEODORE A. FORNKAHL.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 272,745 Mumm Feb. 20, 1883 436,717 Moore Sept. 16, 1890 475,923 Bowring May 31, 1892 481,408 Manley Aug. 23, 1892 490,632 Ransome Jan. 24, 1893 647,777 White Apr. 17, 1900 663,109 Tucker Dec. 4, 1900 841,404 Jay Jan. 15, 1907 971,686 Michael et a1. Oct. 4, 1910 1,021,545 Messick Mar. 26, 1912 1,070,022 Ehlich Aug. 12, 1913 1,190,141 Friesner July 4, 1916 1,247,706 Moran Nov. 27, 1917 1,337,400 Garson Apr. 20, 1920 2,107,500 Price et a1. Feb. 8, 1933 2,390,192 St. Clair Dec. 4, 1945
US72122A 1949-01-22 1949-01-22 Wire lifting crane Expired - Lifetime US2665012A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728462A (en) * 1952-11-17 1955-12-27 Harry L Fincher Wire lift
US3001763A (en) * 1958-10-10 1961-09-26 Andrew A Pilot Hoist and towing attachment for children's wagons
US3472395A (en) * 1967-11-21 1969-10-14 Chance Co Ab Crossarm gin
US3741525A (en) * 1971-12-15 1973-06-26 W Smedley Pump-pulling apparatus for wells
US3945502A (en) * 1974-07-18 1976-03-23 Diener Robert W Cable lifting device
FR2620692A1 (en) * 1987-09-17 1989-03-24 Perennes Rene Device for lifting and handling heavy items

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US272745A (en) * 1883-02-20 John f
US436717A (en) * 1890-09-16 Holder for phone-receivers
US475923A (en) * 1892-05-31 bowein g
US481408A (en) * 1892-08-23 Inkstand
US490632A (en) * 1893-01-24 Concrete-distributing apparatus
US647777A (en) * 1899-05-10 1900-04-17 Robert White Boat securing and launching apparatus.
US663109A (en) * 1900-01-09 1900-12-04 Bernard Tucker Hoist or lift.
US841404A (en) * 1906-10-31 1907-01-15 William Nicolas Jay Derrick for loading wagons.
US971686A (en) * 1910-01-20 1910-10-04 Charles C Michael Hoisting apparatus.
US1021545A (en) * 1911-11-29 1912-03-26 William L Messick Ship's davit and means for operating the same.
US1070022A (en) * 1912-10-24 1913-08-12 Eugene Ehlich Ship's davit.
US1190141A (en) * 1915-04-30 1916-07-04 Jesse L Friesner Loading apparatus.
US1247706A (en) * 1917-01-25 1917-11-27 Jerome H Moran Davit.
US1337400A (en) * 1918-09-20 1920-04-20 Thorvald N Garson Crane
US2107500A (en) * 1937-06-23 1938-02-08 Price Floyd Milk can conveyer
US2390192A (en) * 1943-07-12 1945-12-04 Clair John N St Method and means of supporting electric cable

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US272745A (en) * 1883-02-20 John f
US436717A (en) * 1890-09-16 Holder for phone-receivers
US475923A (en) * 1892-05-31 bowein g
US481408A (en) * 1892-08-23 Inkstand
US490632A (en) * 1893-01-24 Concrete-distributing apparatus
US647777A (en) * 1899-05-10 1900-04-17 Robert White Boat securing and launching apparatus.
US663109A (en) * 1900-01-09 1900-12-04 Bernard Tucker Hoist or lift.
US841404A (en) * 1906-10-31 1907-01-15 William Nicolas Jay Derrick for loading wagons.
US971686A (en) * 1910-01-20 1910-10-04 Charles C Michael Hoisting apparatus.
US1021545A (en) * 1911-11-29 1912-03-26 William L Messick Ship's davit and means for operating the same.
US1070022A (en) * 1912-10-24 1913-08-12 Eugene Ehlich Ship's davit.
US1190141A (en) * 1915-04-30 1916-07-04 Jesse L Friesner Loading apparatus.
US1247706A (en) * 1917-01-25 1917-11-27 Jerome H Moran Davit.
US1337400A (en) * 1918-09-20 1920-04-20 Thorvald N Garson Crane
US2107500A (en) * 1937-06-23 1938-02-08 Price Floyd Milk can conveyer
US2390192A (en) * 1943-07-12 1945-12-04 Clair John N St Method and means of supporting electric cable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728462A (en) * 1952-11-17 1955-12-27 Harry L Fincher Wire lift
US3001763A (en) * 1958-10-10 1961-09-26 Andrew A Pilot Hoist and towing attachment for children's wagons
US3472395A (en) * 1967-11-21 1969-10-14 Chance Co Ab Crossarm gin
US3741525A (en) * 1971-12-15 1973-06-26 W Smedley Pump-pulling apparatus for wells
US3945502A (en) * 1974-07-18 1976-03-23 Diener Robert W Cable lifting device
FR2620692A1 (en) * 1987-09-17 1989-03-24 Perennes Rene Device for lifting and handling heavy items

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