US2544081A - Ship derrick mast - Google Patents

Ship derrick mast Download PDF

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Publication number
US2544081A
US2544081A US709721A US70972146A US2544081A US 2544081 A US2544081 A US 2544081A US 709721 A US709721 A US 709721A US 70972146 A US70972146 A US 70972146A US 2544081 A US2544081 A US 2544081A
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US
United States
Prior art keywords
poles
mast
derrick
pole
ship
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
US709721A
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English (en)
Inventor
Hallen Alf Eskil
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Individual
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Individual
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Publication date
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Publication of US2544081A publication Critical patent/US2544081A/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02—Ventilation; Air-conditioning
    • B63J2/10—Ventilating-shafts; Air-scoops
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/04—Making spongy iron or liquid steel, by direct processes in retorts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/146—Multi-step reduction without melting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B63B2015/0016—Masts characterized by mast configuration or construction
    • B63B2015/0025—Bipodded masts, e.g. A-type masts

Definitions

  • the present invention relates to masts and socalled derrick poles which are employed for supporting derricks or other lifting devices on board ships.
  • Masts or poles of this kind have hitherto been constructed in most cases in the form of round tubes which have the same resistance capacity to bending fore and aft and athwartship, and for masts it has usually been necessary to employ stays both in the athwartship and fore and aft direction.
  • Attempts have also been made to use self-supporting masts, that is to say, the masts were constructed with such a large diameter and of such thickness of material that they were capable of carrying the load themselves.
  • Masts of the last-mentioned type are however very heavy and furthermore occupy a relatively large space on the deck in consequence of their large root diameter.
  • the object of the invention is to produce a mast or pole which is self-supporting in the fore and aft direction, that is to say, which is capable of resisting to the bending stresses occurring in a fore and aft direction without special stays.
  • Fig. '1 is a View from fore or aft of two derrick poles arranged side by side on a ship, and a side view thereof is shown in Fig. 2.
  • Fig. 3 is a section to an enlarged scale along the line III-III in Fig. 1, whilst Fig. 4 is a view from above of one of the derrick poles shown in Fig. 1, also to an enlarged scale.
  • Figs. 5 and 6 show a mast construction according to 'the invention viewed from the side and aft, re-
  • the masts or poles according to the invention may suitably taper towards the top.
  • the lower part of the mast has a relatively large extension in the fore and aft direction, and in the case of tubular masts it is therefore possible to provide ventilating openings in the lower part of the mast for the ventilation of the ships hold and the like.
  • the condensation of the moisture contained in the air inside the long air passage through the pole gave rise to inconvenience.
  • the ventilating openings according to the invention may be located at the lower part of the mast the hollow space in the mast above the ventilating openings may be closed hermetically whereby the inside of the mast will require a minimum of attention.
  • the closure of the inside of the mast may be efiected by means of one or a plurality of intermediate partitions which at the same time strengthen the walls of the tube.
  • closing shutters which may be made adjustable in such a way that in the open position they also serve for controlling the air for the purpose of rendering it possible to produce pressure or suction ventilation in the holds or the like.
  • numeral I indicates two derrick poles which rise up from a mast housin 3 located on the deck of a ship 2. As will be seen from the figures, the poles also extend below the deck 2 and pass through a space underneath, such as a hold 4. The derrick poles I are narrower towards the top and are connected to one another at the top by a stay 5.
  • each pole of the bipod derrick mast has a substantially oval section and is built-up from two iron plates 6 facing fore and aft, the said plates being connected to one another by Side plates I which are curved outwards.
  • Side plates I which are curved outwards.
  • the side plates are of conical form and the derrick pole, viewed from above, will therefore present the appearance illustrated in Fig. 4. From the last-mentioned figure it will also be seen that, as in Fig. 1, the width of the iron plates 6 decreases from the bottom and upwards above the mast housing 3.
  • the derrick pole will have a much greater rigidity in the fore and aft direction than in the athwartship direction inasmuch as the moment of resistance with respect to an axis parallel to the athwartship direction is greater than the moment of resistance with respect to an axis parallel to the fore and aft direction.
  • ventilating openings are provided in the sides of each derrick pole immediately above the mast housing, and are covered by shutters 8.
  • the arrangement of these ventilating openings will be seen more clearly from Fig. 3.
  • two difierent alternatives are shown, inasmuch as two shutters 8 are indicated diagrammatically in the left-hand porpoles shown in Figs. 1 and 2.
  • shutters 8 are shown by dotted lines in the figure. These shutters may be constructed in a known manner in such a way that they can be opened and pivoted as required along the one vertical edge or the other. As the figure shows, it is possible to produce a superatmospheric or subatmospheric pressure in the interior of the pole as required, independently of the direction of the wind. Since the pole communicates through openings 9 below the deck 2 with the holds, pressure or suction ventilation can be obtained in the latter.
  • a certain weakening of the boom poles is caused by the ventilating openings, which can be compensated in a simple manner by placing Welded frames i0 around the openings.
  • the intermediate partitions II also contribute towards the stiffening of the tube construction.
  • the derrick poles described above are so di- 'mensioned that they are capable of resisting to the bending stresses occurring in a fore and aft direction without special stays.
  • the poles As the tops are connected to one another by means of the stay 5, the poles together form a construction which is self-supporting in the athwarthship direction also.
  • a type of mast construct-ion is shown the lowerpart of which takes the form of a bracket consisting of two poles inclined towards one another and connected at the top, the said poles being of substantially the same construction as those shown in Figs. 1 and 2.
  • the poles l are thus rigidly welded at the top to an outrigger 13 which is intended to serve as the fastenin member for the top rope of the appertaining derrick.
  • the mast presents a rigidity in the fore and aft direction which has substantially double the rigidity of each separate pole I, whilst the rigidity in the athwartship direction is sufiicient to en-- able the mast to be self-supporting in this direction at all loads occurring.
  • the mast construction is accompanied by the same advantages with regard to ventilation as those obtained with the derrick
  • the ame reference numerals have been adopted as in Figs. 1 and 2 to indicate similar constructional elements.
  • a ships ri carried out according to the invention entails an appreciably lower cost than a corresponding rig of earlier construction and is at the same time much lighter which is a great advantage from the point of view of stability.
  • the invention is not limited to the forms of construction illustrated and described.
  • the cross-section and mutual location, etc., of the poles or masts can be varied in numerous ways, and poles, masts or the like members constructed according to the invention may replace all forms of previously known derrick poles, masts or the like.
  • the use of the term cross-section here refers not only to the external contour or shape of the section but also to the nature of the parts of the section.
  • the section may be understood to include parts acting as armouring members.
  • the combination with a ship having a deck and a hold beneath the deck of a bipod derrick mast comprising two tubular pole members extending above and below the deck, said pole members being spaced apart at the base and disposed in a vertical plane extending athwartship, the poles above deck being inclined toward each other and meeting at the top thereof, each of said poles being hollow and oval in cross-section and disposed with the long axis extending fore and aft, each of said poles having ventilating open- .ings in the lower portions thereof above and below decks and a sealing partition closing the interior of said poles to the atmosphere above the upper ventilating opening, means for securing the upper ends of the poles rigidly together and means closing the upper ends thereof.
  • each pole is comprised of fiat iron plates facing fore and aft, and outwardly curved side plates thinner than said fiat plates facing athwartship and connected to said flat plates along the edges so as to constitute a tube of substantially oval cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Tents Or Canopies (AREA)
US709721A 1945-11-24 1946-11-14 Ship derrick mast Expired - Lifetime US2544081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2544081X 1945-11-24

Publications (1)

Publication Number Publication Date
US2544081A true US2544081A (en) 1951-03-06

Family

ID=37621934

Family Applications (1)

Application Number Title Priority Date Filing Date
US709721A Expired - Lifetime US2544081A (en) 1945-11-24 1946-11-14 Ship derrick mast

Country Status (6)

Country Link
US (1) US2544081A (da)
BE (1) BE470742A (da)
DE (1) DE897054C (da)
DK (1) DK72184C (da)
FR (1) FR943662A (da)
GB (1) GB625746A (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501214A (en) * 1982-05-18 1985-02-26 Meyer Urs P Mast for a sail
FR2898863A1 (fr) * 2006-03-24 2007-09-28 Georges Baikoff Dispositif d'aeration pour voiliers de plaisance
CN112572751A (zh) * 2021-01-07 2021-03-30 江苏扬子鑫福造船有限公司 一种lng燃料舱透气桅

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201205B (de) * 1962-06-12 1965-09-16 Hallen Alf E Ladebaummast
EP0261210A1 (en) * 1986-04-02 1988-03-30 Fast Masts Pty. Limited Mast

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US38151A (en) * 1863-04-14 Improved mast for navigable vessels
US655707A (en) * 1899-06-01 1900-08-14 William C Haynes Mast for steam vessels.
US1026336A (en) * 1912-01-30 1912-05-14 William H Williams Boat.
GB125590A (en) * 1916-08-26 1919-05-01 Richard William Allen Improvements in and connected with the Cowls of Air Intake Shafts of Ships.
US1700660A (en) * 1928-04-02 1929-01-29 Williams Elmo Hamilton Stream-line sail
US1737550A (en) * 1929-02-25 1929-12-03 Adams John Air supplier
GB393621A (en) * 1931-11-02 1933-06-02 Aubrey Frederic Burstall Improvements in or relating to metal pylons for carrying overhead wires
US2015000A (en) * 1932-09-17 1935-09-17 Beringer Christian August Sail rig for water craft
US2065715A (en) * 1935-12-09 1936-12-29 Peter F Leon Convertible mast construction
US2084338A (en) * 1935-09-19 1937-06-22 Clyde M Hamblin Waterproof ventilator
US2122380A (en) * 1934-03-22 1938-06-28 Budd Edward G Mfg Co Mast
US2141181A (en) * 1934-12-04 1938-12-27 Geddes Norman Bel Ship

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US38151A (en) * 1863-04-14 Improved mast for navigable vessels
US655707A (en) * 1899-06-01 1900-08-14 William C Haynes Mast for steam vessels.
US1026336A (en) * 1912-01-30 1912-05-14 William H Williams Boat.
GB125590A (en) * 1916-08-26 1919-05-01 Richard William Allen Improvements in and connected with the Cowls of Air Intake Shafts of Ships.
US1700660A (en) * 1928-04-02 1929-01-29 Williams Elmo Hamilton Stream-line sail
US1737550A (en) * 1929-02-25 1929-12-03 Adams John Air supplier
GB393621A (en) * 1931-11-02 1933-06-02 Aubrey Frederic Burstall Improvements in or relating to metal pylons for carrying overhead wires
US2015000A (en) * 1932-09-17 1935-09-17 Beringer Christian August Sail rig for water craft
US2122380A (en) * 1934-03-22 1938-06-28 Budd Edward G Mfg Co Mast
US2141181A (en) * 1934-12-04 1938-12-27 Geddes Norman Bel Ship
US2084338A (en) * 1935-09-19 1937-06-22 Clyde M Hamblin Waterproof ventilator
US2065715A (en) * 1935-12-09 1936-12-29 Peter F Leon Convertible mast construction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501214A (en) * 1982-05-18 1985-02-26 Meyer Urs P Mast for a sail
FR2898863A1 (fr) * 2006-03-24 2007-09-28 Georges Baikoff Dispositif d'aeration pour voiliers de plaisance
WO2007122308A3 (fr) * 2006-03-24 2008-12-24 Georges Baikoff Dispositif d'aeration pour voiliers de plaisance
CN112572751A (zh) * 2021-01-07 2021-03-30 江苏扬子鑫福造船有限公司 一种lng燃料舱透气桅
CN112572751B (zh) * 2021-01-07 2021-10-29 江苏扬子鑫福造船有限公司 一种lng燃料舱透气桅

Also Published As

Publication number Publication date
GB625746A (en) 1949-07-04
DK72184C (da) 1951-02-19
FR943662A (fr) 1949-03-15
DE897054C (de) 1953-11-16
BE470742A (da) 1947-02-28

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