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GB1426774A - Automatic device for trimming vessels - Google Patents

Automatic device for trimming vessels

Info

Publication number
GB1426774A
GB1426774A GB4365373A GB4365373A GB1426774A GB 1426774 A GB1426774 A GB 1426774A GB 4365373 A GB4365373 A GB 4365373A GB 4365373 A GB4365373 A GB 4365373A GB 1426774 A GB1426774 A GB 1426774A
Authority
GB
United Kingdom
Prior art keywords
axis
photo
vessel
axes
list
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
Application number
GB4365373A
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.)
Levellers A M & I Ltd
Original Assignee
Levellers A M & I Ltd
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 Levellers A M & I Ltd filed Critical Levellers A M & I Ltd
Priority to GB4365373A priority Critical patent/GB1426774A/en
Publication of GB1426774A publication Critical patent/GB1426774A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/061—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water by using trimflaps, i.e. flaps mounted on the rear of a boat, e.g. speed boat
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/08—Control of attitude, i.e. control of roll, pitch, or yaw
    • G05D1/0875—Control of attitude, i.e. control of roll, pitch, or yaw specially adapted to water vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1426774 Automatic trimming device A M & I LEVELLERS Ltd 18 Sept 1973 43653/73 Heading B7M An automatic trimming device corrects trim of a moving vessel having perpendicular X and Y axes of roll and pitch respectively, the X and Y axes being horizontal when the vessel is in the design attitude, and a mutually perpendicular Z axis. Sensing means of the device responsive to a continued departure from the design attitude includes an unbalanced disc 23 mounted for free rotation about a pivot axis 24 coincident with or parallel to the Z axis. The disc has an opening 35 and is mounted in chamber 20 which contains damping fluid. Forward 31, aft 32 photo-electric cells are in a plane normal to the Y axis, port 34, Fig. 2, not shown, starbaord 33 photo-electric cells are in a plane normal to the X axis and the two planes intersect in the pivot axis. Each photo-electric cell has an electrical output responsive to light rays 35À1 impinging on it when the opening 35 is in line with that particular cell and light source 22. Amplifiers A31-A34 and relays R31-R34, Fig. 4 (not shown), interconnect the sensing means and trim tabs 14.1 and 14.2 to correct the attitude of the vessel. Movement of the tabs each in different directions corrects list to port or list to starbard.
GB4365373A 1973-09-18 1973-09-18 Automatic device for trimming vessels Expired GB1426774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4365373A GB1426774A (en) 1973-09-18 1973-09-18 Automatic device for trimming vessels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4365373A GB1426774A (en) 1973-09-18 1973-09-18 Automatic device for trimming vessels

Publications (1)

Publication Number Publication Date
GB1426774A true GB1426774A (en) 1976-03-03

Family

ID=10429720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4365373A Expired GB1426774A (en) 1973-09-18 1973-09-18 Automatic device for trimming vessels

Country Status (1)

Country Link
GB (1) GB1426774A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803942A1 (en) * 1988-02-10 1989-08-24 Eltrim Hugo Krueger Kg DEVICE FOR INFLUENCING THE WATER LEVEL OF A BOAT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803942A1 (en) * 1988-02-10 1989-08-24 Eltrim Hugo Krueger Kg DEVICE FOR INFLUENCING THE WATER LEVEL OF A BOAT

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee