US1330077A - Swing-derrick for ships and the like - Google Patents

Swing-derrick for ships and the like Download PDF

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Publication number
US1330077A
US1330077A US241883A US24188318A US1330077A US 1330077 A US1330077 A US 1330077A US 241883 A US241883 A US 241883A US 24188318 A US24188318 A US 24188318A US 1330077 A US1330077 A US 1330077A
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United States
Prior art keywords
derrick
ships
swing
trunnion
supporting member
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Expired - Lifetime
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US241883A
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Kahrs Otto
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Individual
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Priority to GB9063/18A priority Critical patent/GB117608A/en
Priority to FR490360A priority patent/FR490360A/en
Application filed by Individual filed Critical Individual
Priority to US241883A priority patent/US1330077A/en
Application granted granted Critical
Publication of US1330077A publication Critical patent/US1330077A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B66C23/60—Derricks
    • B66C23/605—Derricks employing ships' masts

Definitions

  • the present invention relates to swing derricks for ships and the like and has for its object to provide a derrick of this kind which may easily be mechanically driven even when mounted as an ordinary derrick on the mast.
  • the usual ships derricks are operated by means of ropes or wires fastened to the top of the derrick beam.
  • the operation of the derrick in this manner is slow and clumsy one rope or wire on each side of the derrick beam being necessary each requiring a man for its operation.
  • an ordinary derrick crane is too heavy and expensive for installation and use in ordinary ships.
  • a segment shaped disk is mounted on the ordinary derrick trunnion fastened to the mast, said segment-shaped disk serving as a base plate for the derrick beam and being connected with a mechanical driving apparatus by means of which it may be turned upon its pivot.
  • the derrick beam may'suitably consist of truss work or the like in order to obtain sufiicient lateral rigidity.
  • the circumference of the segment may be provided with teeth, so that it may be turned Specification of Letters Patent.
  • Trunnion 2 is connected with a segmentshaped disk 3 which serves as a supporting or base plate for the derrick beam 4.
  • the latter may consist of truss work, as illustrated, or may be provided with wire stays or the like in order to obtain sufiicient lateral rigidity.
  • the segment on its circumference is provided wit teeth and is engaged by a screwor worm 5, so that it may be turned in both directions by means of handle 6 or any other known hand operated or mechanically driven mechanism.
  • an annular band for attachment to a mast of the ship and carrying a trunnion; a derrick boom; a segmentshaped derrick boom supporting member; means for pivotally connecting the boom to the supporting member; a bearing on said supporting member adapted to engage the trunnion on said annular band, whereby the supporting member may be swung about theaxis of said trunnion, said supporting member being cut away to permit th1s movement without interference with the mast; and

Description

O. KAHRS.
SWING DERRICK FOR SHIPS AND THE LIKE. APPLICATION FILED JUNE 25, 1918.
1,330,077. Patented Feb. 10,1920.
f/r/en/or 0/50 KM/j UNITED STATES PATENT OFFICE.
OTTO KAHRS, OF GHRISTIANIA, NORWAY.
SWING-DERRICK FOR SHIPS AND THE LIKE.
Application filed June 25, 1918.
To all whom it may concern:
Be it known that I, O'r'ro KAHRs, a subject of the King of Norway, residing at Ohristiania, in the Kingdom of Norway, have invented certain new and useful Improvements in Swing- Derricks for Ships and the like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.
The present invention relates to swing derricks for ships and the like and has for its object to provide a derrick of this kind which may easily be mechanically driven even when mounted as an ordinary derrick on the mast.
The usual ships derricks are operated by means of ropes or wires fastened to the top of the derrick beam. The operation of the derrick in this manner is slow and clumsy one rope or wire on each side of the derrick beam being necessary each requiring a man for its operation. On the other hand an ordinary derrick crane is too heavy and expensive for installation and use in ordinary ships.
According to the present invention a segment shaped disk is mounted on the ordinary derrick trunnion fastened to the mast, said segment-shaped disk serving as a base plate for the derrick beam and being connected with a mechanical driving apparatus by means of which it may be turned upon its pivot. The derrick beam may'suitably consist of truss work or the like in order to obtain sufiicient lateral rigidity.
The circumference of the segment may be provided with teeth, so that it may be turned Specification of Letters Patent.
Serial No. 241,883.
by means of pinion, screw or the like driven from a suitable source of power.
On the drawing is diagrammatically illustrated a form of the invention.
1 is the mast on which is mounted the ordinary trunnion 2 for a derrick beam.
Trunnion 2 is connected with a segmentshaped disk 3 which serves as a supporting or base plate for the derrick beam 4. The latter may consist of truss work, as illustrated, or may be provided with wire stays or the like in order to obtain sufiicient lateral rigidity.
The segment on its circumference is provided wit teeth and is engaged by a screwor worm 5, so that it may be turned in both directions by means of handle 6 or any other known hand operated or mechanically driven mechanism.
Claim.
In a'swinging loading derrick for ships, the combination of an annular band for attachment to a mast of the ship and carrying a trunnion; a derrick boom; a segmentshaped derrick boom supporting member; means for pivotally connecting the boom to the supporting member; a bearing on said supporting member adapted to engage the trunnion on said annular band, whereby the supporting member may be swung about theaxis of said trunnion, said supporting member being cut away to permit th1s movement without interference with the mast; and
means mounted on the deck of the ship for rotating said supporting member.
In testimony that I claim the .foregoing as my invention, I have signed my name in presence of two subscribing witnesses.
OTTO KAHRS.
Witnesses:
J. A. LORMAR, M. W. KAHRS.
Patented Feb. 10, 1920.
US241883A 1917-07-04 1918-06-25 Swing-derrick for ships and the like Expired - Lifetime US1330077A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9063/18A GB117608A (en) 1917-07-04 1918-06-01 Improvements in Swing Derricks for Ships and the like.
FR490360A FR490360A (en) 1917-07-04 1918-06-03 Oscillating load masts for boats, barges and more
US241883A US1330077A (en) 1918-06-25 1918-06-25 Swing-derrick for ships and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241883A US1330077A (en) 1918-06-25 1918-06-25 Swing-derrick for ships and the like

Publications (1)

Publication Number Publication Date
US1330077A true US1330077A (en) 1920-02-10

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US241883A Expired - Lifetime US1330077A (en) 1917-07-04 1918-06-25 Swing-derrick for ships and the like

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