Apparatus for calculation of depth, trim, bending moment and shearing stress in a loaded ship
First Claim
1. AN ELECTRICAL ANALOG COMPUTING APPARATUS FOR A SHIP FOR CALCULATING THE DRAUGHT, THE TRIM IN THE PITCH PLANE, AND THE BENDING MOMENT AT A FIRST PREDETERMINED TRANSVERSE PLANE, FOR A PROPOSED MANNER OF LOADING, COMPRISING A FIRST SIGNAL-GENERATING MEANS ADJUSTABLE TO PRODUCE AN ELECTRIC SIGNAL IN ACCORDANCE WITH THE ADJUSTMENT SO MADE TO BE USED IN THE APPARATUS AS A DRAUGHTREPRESENTING SIGNAL, A SECOND SIGNAL-GENERATING MEANS ADJUSTABLE TO PRODUCE AN ELECTRIC SIGNAL IN ACCORDANCE WITH THE ADJUSTMENT SO MADE TO BE USED IN THE APPARATUS AS A TRIM-REPRESENTING SIGNAL, A PLURALITY OF ELEMENTARY COMPUTING MEANS, ONE FOR EACH OF A CORRESPONDING PLURALITY OF SECTIONS INTO WHICH THE SHIP IS ASSUMED TO BE DIVIDED, EACH ELEMENTARY COMPUTING MEANS COMPRISING A WEIGHTSIGNAL-GENERATING CIRCUIT AND A BUOYANCY-FORCE-SIGNALGENERATING CIRCUIT, THE WEIGHT-SIGNAL-GENERATING CIRCUIT INCLUDING MANUALLY ADJUSTABLE MEANS SETTABLE IN ACCORDANCE WITH AN ASSOCIATED SCALE MEANS REPRESENTING WEIGHT AND OPERATIVE TO CONTROL THE OUTPUT OF THE FIRST SIGNAL-GENERATING CIRCUIT TO PROVIDE AN OUTPUT CURRENT PROPORTIONAL TO THE SUM OF THE WEIGHT OF THE CORRESPONDING SECTION AND THE PROPOSED LOAD TO BE PLACED IN IT AS INDICATED ON THE SCALE MEANS, AND THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT HAVING FIRST AND SECOND INPUT CHANNELS AND BEING OPERATIVE TO PRODUCE AN OUTPUT SIGNAL THAT IS THE SUM OF A FIRST COMPONENT OUTPUT SIGNAL THAT IS PROPORTIONAL TO A FIRST INPUT SIGNAL APPLIED TO THE FIRST INPUT CHANNEL WITH A GAIN REPRESENTATIVE OF A PREDETERMINED BUOYANCY FACTOR FOR THE CORRESPONDING SECTION AND OF A SECOND COMPONENT OUTPUT SIGNAL THAT IS PROPORTIONAL TO A SECOND INPUT SIGNAL APPLIED TO THE SECOND INPUT CHANNEL WITH A GAIN REPRESENTATIVE OF THE PRODUCT OF THE BUOYANCY FACTOR OF THE CORRESPONDING SECTION AND THE DISTANCE OF THE SECTION FROM A FIRST REFERENCE TRANSVERSE PLANE OF THE SHIP, THE FIRST AND SECOND INPUT CHANNELS BEING RESPECTIVELY CONNECTED TO RECEIVE THE DRAUGHT-REPRESENTING AND TRIM-REPRESENTING SIGNALS AS INPUTS, WHEREBY THE TOTAL OUTPUT SIGNAL OF THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT IS REPRESENTATIVE OF THE BUOYANCY FORCE THAT WOULD BE EXERTED ON THE CORRESPONDING SECTION FOR THE PROPOSED MANNER OF LOADING IF THE SHIP WERE TO HAVE THE VALUES OF DRAUGHT AND TRIM PROVIDED BY THE DRAUGHTREPRESENTING SIGNAL AND TRIM-REPRESENTING SIGNAL GENERATING MEANS, ELEMENTARY SUMMING MEANS CONNECTED TO RECEIVE THE OUTPUTS OF THE WEIGHT-SIGNAL-GENERATING CIRCUIT AND THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT AS INPUTS AND TO PROVIDE AN OUTPUT SIGNAL THAT IS REPRESENTATIVE IN MAGNITUDE AND SENSE OF THEIR ALGEBRAIC SUM, AND A MOMENT-COMPUTING CIRCUIT OPERATIVE TO PRODUCE AN OUTPUT SIGNAL THAT IS PROPORTIONAL TO AN INPUT SIGNAL WITH AN ADJUSTABLE GAIN, SAID COMPUTER APPARATUS ALSO INCLUDING FIRST AND SECOND PRIMARY SUMMING MEANS, FIRST AND SECOND SWITCH MEANS, SAID FIRST SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT THE OUTPUT SIGNALS OF ALL THE ELEMENTARY SUMMING MEANS TO THE FIRST PRIMARY SUMMING MEANS, AND SAID SECOND SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT ALL THE OUTPUT SIGNALS OF THE ELEMENTARY SUMMING MEANS AS INPUT SIGNALS TO THE CORRESPONDING MOMENT-COMPUTING CIRCUITS, SIMULTANEOUSLY TO ADJUST THE GAINS OF THE MOMENT-COMPUTING CIRCUITS SO AS TO MAKE THE GAINS RESPECTIVELY PROPORTIONAL TO THE DISTANCES OF THE CORRESPONDING SECTIONS FROM A SECOND REFERENCE TRANSVERSE PLANE, AND TO CONNECT THE OUTPUT SIGNALS OF ALL THE MOMENT-COMPUTING CIRCUITS TO SAID SECOND PRIMARY SUMMING MEANS, WHEREBY, BY SUITABLE ADJUSTMENT OF THE DRAUGHT-REPRESENTING-SIGNAL-GENERATING MEANS THE TRIM-REPRESENTING-SIGNAL-GENERATING MEANS TO MAKE THE OUTPUTS OF THE FIRST AND SECOND PRIMARY SUMMING MEANS SUBSTANTIALLY ZERO, MORE ACCURATE VALUES OF DRAUGHT-REPRESENTING AND TRIM-REPRESENTING SIGNALS ARE OBTAINED, SAID SECOND SWITCH MEANS BEING FURTHER SELECTIVELY OPERABLE TO CONNECT THE OUTPUT SIGNALS OF THE ELEMENTARY SUMMING MEANS OF THOSE ELEMENTARY COMPUTING MEANS CORRESPONDING TO THOSE SECTIONS TO ONE SIDE OF THE FIRST PREDETERMINED PLANE AT WHICH IT IS DESIRED TO CALCULATE BENDING MOMENT AS INPUT SIGNALS TO CORRESPONDING MOMENT-COMPUTING CIRCUITS, SIMULTANEOUSLY TO ADJUST THE GAINS OF THE SAID MOMENT-COMPUTING CIRCUITS SO AS TO MAKE THE GAINS RESPECTIVELY PROPORTIONAL TO THE DISTANCES OF THE CORRESPONDING SECTIONS FROM THE SAID FIRST PREDETERMINED TRANSVERSE PLANE, AND TO CONNECT THE OUTPUT SIGNALS OF THE SELECTED MOMENT-COMPUTING CIRCUITS TO THE SECOND SUMMING MEANS TO PROVIDE A MEASURE OF THE BENDING MOMENT.
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1 Claim
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1. AN ELECTRICAL ANALOG COMPUTING APPARATUS FOR A SHIP FOR CALCULATING THE DRAUGHT, THE TRIM IN THE PITCH PLANE, AND THE BENDING MOMENT AT A FIRST PREDETERMINED TRANSVERSE PLANE, FOR A PROPOSED MANNER OF LOADING, COMPRISING A FIRST SIGNAL-GENERATING MEANS ADJUSTABLE TO PRODUCE AN ELECTRIC SIGNAL IN ACCORDANCE WITH THE ADJUSTMENT SO MADE TO BE USED IN THE APPARATUS AS A DRAUGHTREPRESENTING SIGNAL, A SECOND SIGNAL-GENERATING MEANS ADJUSTABLE TO PRODUCE AN ELECTRIC SIGNAL IN ACCORDANCE WITH THE ADJUSTMENT SO MADE TO BE USED IN THE APPARATUS AS A TRIM-REPRESENTING SIGNAL, A PLURALITY OF ELEMENTARY COMPUTING MEANS, ONE FOR EACH OF A CORRESPONDING PLURALITY OF SECTIONS INTO WHICH THE SHIP IS ASSUMED TO BE DIVIDED, EACH ELEMENTARY COMPUTING MEANS COMPRISING A WEIGHTSIGNAL-GENERATING CIRCUIT AND A BUOYANCY-FORCE-SIGNALGENERATING CIRCUIT, THE WEIGHT-SIGNAL-GENERATING CIRCUIT INCLUDING MANUALLY ADJUSTABLE MEANS SETTABLE IN ACCORDANCE WITH AN ASSOCIATED SCALE MEANS REPRESENTING WEIGHT AND OPERATIVE TO CONTROL THE OUTPUT OF THE FIRST SIGNAL-GENERATING CIRCUIT TO PROVIDE AN OUTPUT CURRENT PROPORTIONAL TO THE SUM OF THE WEIGHT OF THE CORRESPONDING SECTION AND THE PROPOSED LOAD TO BE PLACED IN IT AS INDICATED ON THE SCALE MEANS, AND THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT HAVING FIRST AND SECOND INPUT CHANNELS AND BEING OPERATIVE TO PRODUCE AN OUTPUT SIGNAL THAT IS THE SUM OF A FIRST COMPONENT OUTPUT SIGNAL THAT IS PROPORTIONAL TO A FIRST INPUT SIGNAL APPLIED TO THE FIRST INPUT CHANNEL WITH A GAIN REPRESENTATIVE OF A PREDETERMINED BUOYANCY FACTOR FOR THE CORRESPONDING SECTION AND OF A SECOND COMPONENT OUTPUT SIGNAL THAT IS PROPORTIONAL TO A SECOND INPUT SIGNAL APPLIED TO THE SECOND INPUT CHANNEL WITH A GAIN REPRESENTATIVE OF THE PRODUCT OF THE BUOYANCY FACTOR OF THE CORRESPONDING SECTION AND THE DISTANCE OF THE SECTION FROM A FIRST REFERENCE TRANSVERSE PLANE OF THE SHIP, THE FIRST AND SECOND INPUT CHANNELS BEING RESPECTIVELY CONNECTED TO RECEIVE THE DRAUGHT-REPRESENTING AND TRIM-REPRESENTING SIGNALS AS INPUTS, WHEREBY THE TOTAL OUTPUT SIGNAL OF THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT IS REPRESENTATIVE OF THE BUOYANCY FORCE THAT WOULD BE EXERTED ON THE CORRESPONDING SECTION FOR THE PROPOSED MANNER OF LOADING IF THE SHIP WERE TO HAVE THE VALUES OF DRAUGHT AND TRIM PROVIDED BY THE DRAUGHTREPRESENTING SIGNAL AND TRIM-REPRESENTING SIGNAL GENERATING MEANS, ELEMENTARY SUMMING MEANS CONNECTED TO RECEIVE THE OUTPUTS OF THE WEIGHT-SIGNAL-GENERATING CIRCUIT AND THE BUOYANCY-FORCE-SIGNAL-GENERATING CIRCUIT AS INPUTS AND TO PROVIDE AN OUTPUT SIGNAL THAT IS REPRESENTATIVE IN MAGNITUDE AND SENSE OF THEIR ALGEBRAIC SUM, AND A MOMENT-COMPUTING CIRCUIT OPERATIVE TO PRODUCE AN OUTPUT SIGNAL THAT IS PROPORTIONAL TO AN INPUT SIGNAL WITH AN ADJUSTABLE GAIN, SAID COMPUTER APPARATUS ALSO INCLUDING FIRST AND SECOND PRIMARY SUMMING MEANS, FIRST AND SECOND SWITCH MEANS, SAID FIRST SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT THE OUTPUT SIGNALS OF ALL THE ELEMENTARY SUMMING MEANS TO THE FIRST PRIMARY SUMMING MEANS, AND SAID SECOND SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT ALL THE OUTPUT SIGNALS OF THE ELEMENTARY SUMMING MEANS AS INPUT SIGNALS TO THE CORRESPONDING MOMENT-COMPUTING CIRCUITS, SIMULTANEOUSLY TO ADJUST THE GAINS OF THE MOMENT-COMPUTING CIRCUITS SO AS TO MAKE THE GAINS RESPECTIVELY PROPORTIONAL TO THE DISTANCES OF THE CORRESPONDING SECTIONS FROM A SECOND REFERENCE TRANSVERSE PLANE, AND TO CONNECT THE OUTPUT SIGNALS OF ALL THE MOMENT-COMPUTING CIRCUITS TO SAID SECOND PRIMARY SUMMING MEANS, WHEREBY, BY SUITABLE ADJUSTMENT OF THE DRAUGHT-REPRESENTING-SIGNAL-GENERATING MEANS THE TRIM-REPRESENTING-SIGNAL-GENERATING MEANS TO MAKE THE OUTPUTS OF THE FIRST AND SECOND PRIMARY SUMMING MEANS SUBSTANTIALLY ZERO, MORE ACCURATE VALUES OF DRAUGHT-REPRESENTING AND TRIM-REPRESENTING SIGNALS ARE OBTAINED, SAID SECOND SWITCH MEANS BEING FURTHER SELECTIVELY OPERABLE TO CONNECT THE OUTPUT SIGNALS OF THE ELEMENTARY SUMMING MEANS OF THOSE ELEMENTARY COMPUTING MEANS CORRESPONDING TO THOSE SECTIONS TO ONE SIDE OF THE FIRST PREDETERMINED PLANE AT WHICH IT IS DESIRED TO CALCULATE BENDING MOMENT AS INPUT SIGNALS TO CORRESPONDING MOMENT-COMPUTING CIRCUITS, SIMULTANEOUSLY TO ADJUST THE GAINS OF THE SAID MOMENT-COMPUTING CIRCUITS SO AS TO MAKE THE GAINS RESPECTIVELY PROPORTIONAL TO THE DISTANCES OF THE CORRESPONDING SECTIONS FROM THE SAID FIRST PREDETERMINED TRANSVERSE PLANE, AND TO CONNECT THE OUTPUT SIGNALS OF THE SELECTED MOMENT-COMPUTING CIRCUITS TO THE SECOND SUMMING MEANS TO PROVIDE A MEASURE OF THE BENDING MOMENT.
Specification
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- Resources
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Current AssigneeKnut Grimnes
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Original AssigneeKnut Grimnes
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InventorsKNUT GRIMNES
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Application NumberUS04/021,797Time in Patent Office1,456 DaysField of SearchUS Class Current702/43CPC Class CodesB63B 39/12 for indicating draught or loadG06G 7/68 for civil engineering struc...G06G 7/70 for vehicles, e.g. to deter...
