Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
305 words
In line-tensioning mechanism incluDing line-winding means connected to a line, an electric line-winding means motor continuously connected to supply continuous mechanical torque to the line-winding means for winding in such line whenever the mechanical torque on the line-winding means produced by the line tension tends to drop below the mechanical torque produced on the line-winding means by the line-winding means motor, an electric power source normally continuously connected to the line-winding means motor to provide electric current thereto continuously for producing mechanical torque on the line-winding means tending to reel in line whether the line-winding means motor is stopped or turning in a line-reeling-in direction or turning in the linepaying-out direction, and load-responsive means responsive to the electric current load on the electric power source resulting from the mechanical torque produced by the line-winding means motor on the line-winding means and operable to vary an output characteristic of the electric power source automatically in response to variation in mechanical torque exerted by the linewinding means motor on the line-winding means resulting from changes in line load and corresponding variation in electric current load on the electric power source, the improvement comprising the electric power source including a first alternator normally connected to supply electric current to the line-winding means motor, an alternating current electrical machine having a wound rotor, operable selectively as a motor and as a second alternator and mechanically connected to drive said first alternator when operating as a motor, means for electrically disconnecting said first alternator from the line-winding means motor and connecting the rotor winding of said alternating current electrical machine to the line-winding means motor when said electrical machine is operating as a second alternator, and driving means connected to said alternating current electrical machine for driving the rotor thereof mechanically when said machine is operating as a second alternator.
Claim 2
Dependent Claim
305 words
In line-tensioning mechanism incluDing line-winding means connected to a line, an electric line-winding means motor continuously connected to supply continuous mechanical torque to the line-winding means for winding in such line whenever the mechanical torque on the line-winding means produced by the line tension tends to drop below the mechanical torque produced on the line-winding means by the line-winding means motor, an electric power source normally continuously connected to the line-winding means motor to provide electric current thereto continuously for producing mechanical torque on the line-winding means tending to reel in line whether the line-winding means motor is stopped or turning in a line-reeling-in direction or turning in the linepaying-out direction, and load-responsive means responsive to the electric current load on the electric power source resulting from the mechanical torque produced by the line-winding means motor on the line-winding means and operable to vary an output characteristic of the electric power source automatically in response to variation in mechanical torque exerted by the linewinding means motor on the line-winding means resulting from changes in line load and corresponding variation in electric current load on the electric power source, the improvement comprising the electric power source including a first alternator normally connected to supply electric current to the line-winding means motor, an alternating current electrical machine having a wound rotor, operable selectively as a motor and as a second alternator and mechanically connected to drive said first alternator when operating as a motor, means for electrically disconnecting said first alternator from the line-winding means motor and connecting the rotor winding of said alternating current electrical machine to the line-winding means motor when said electrical machine is operating as a second alternator, and driving means connected to said alternating current electrical machine for driving the rotor thereof mechanically when said machine is operating as a second alternator.
Claim 3
Dependent Claim
44 words
In the line-tensioning mechanism defined in claim 1, the driving means being continuously connected mechanically to the alternating current electrical machine for driving of the driving means by the alternating current electrical machine when the alternating current electrical machine is operating as a motor.
Claim 4
Dependent Claim
16 words
In the line-tensioning mechanism defined in claim 1, the driving means including a squirrel-cage induction motor.
Claim 5
Dependent Claim
58 words
In the line-tensioning mechanism defined in claim 1, the alternating current electrical machine being a phase-wound induction machine including a stator winding and a rotor winding, one of said windings being connected to the line-winding means motor to serve as a power supply therefor, and an alternating current supply connected to the other winding of the electrical machine.
Claim 6
Dependent Claim
33 words
In the line-tensioning mechanism defined in claim 4, the driving means including a squirrel-cage induction motor electrically connectible to the same alternating current supply that is connected to the alternating current electrical machine.
Claim 7
Dependent Claim
29 words
In the line-tensioning mechanism defined in claim 1, and means for continuously mechanically connecting the rotor of the first alternator and the rotor of the alternating current electrical machine.