Control signal generator
First Claim
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1. A control signal generator for generating a plurality of control signals comprising:
- a housing;
an actuating member pivotally connected to said housing;
a first sensor and a second sensor positioned in said housing, each said sensor comprising;
a first induction coil;
a second induction coil aligned with and spaced from said first induction coil; and
a stem extendable through said first and second induction coils, said stem comprising;
a protruding end for contacting said actuator member;
a first magnetizable section; and
a second magnetizable section spaced from said first magnetizable section;
such that when said stems move in response to movement of said actuating member, said first magnetizable section and said second magnetizable section are displaced relative to said first induction coil and said second induction coil, respectively, whereby an inductivity of said induction coils is variable as a function of displacement of said stems.
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Abstract
A control signal generator for generating a plurality of control signals has a pivotally mounted control lever with an actuating member (24) . Diametrically opposite sensors (28,30) have stems (40,42), which can be pushed down by the actuating field (26). Each stem (40,42) extends through a pair of induction coils (32,26;34,38) . Magnetizable material (50,52) is displaced relative to the induction coils, when the stem (40,42) is pushed down. Pairs of opposite induction coils provide output signals. A comparator circuit compares the output signals of the pairs to control the unobjectionable operation of the sensors.
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Citations
20 Claims
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1. A control signal generator for generating a plurality of control signals comprising:
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a housing; an actuating member pivotally connected to said housing; a first sensor and a second sensor positioned in said housing, each said sensor comprising; a first induction coil; a second induction coil aligned with and spaced from said first induction coil; and a stem extendable through said first and second induction coils, said stem comprising; a protruding end for contacting said actuator member; a first magnetizable section; and a second magnetizable section spaced from said first magnetizable section; such that when said stems move in response to movement of said actuating member, said first magnetizable section and said second magnetizable section are displaced relative to said first induction coil and said second induction coil, respectively, whereby an inductivity of said induction coils is variable as a function of displacement of said stems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control signal generator for generating a plurality of control signals with a single control lever comprising:
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a housing; control lever means pivotally mounted to said housing; an actuating member attached to said control lever means; a pair of sensors comprising a first sensor and a second sensor, said sensors diametrically opposite with respect to said control lever means, each said sensor comprising stem means movable in said housing, said stem means having a protruding end for contacting said actuating member; spring means for biasing said protruding end of said stem means toward said actuating member; said actuating member adapted for pushing said protruding end of said stem means toward said spring means; each said sensor further comprising a first induction coil and a second induction coil aligned with said first induction coil, said stem means extending through said first induction coil and second induction coil; each said stem means comprising a first section of magnetizable material, said first section displaceable relative to said first induction coil such that an inductivity of said first induction coil is variable as a function of displacement of said stem means; each said stem means further comprising a second section of magnetizable material spaced from said first section, said second section displaceable relative to said second induction coil such that an inductivity of said second induction coil is variable as a function of displacement of said stem means; first circuit means for responding to and for providing first output signals indicative of inductivity variations of said first induction coil of said first sensor relative to said first induction coil of said second sensor; second circuit means for responding to and for providing second output signals indicative of inductivity variations of said second induction coil of said first sensor relative to said second induction coil of said second sensor; and comparator means for comparing said first output signal and said second output signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A control signal generator for generating a plurality of control signals by means of a single control lever, comprising:
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a housing; control lever means for controlling said control signals; pivot bearing means for pivotally mounting said control lever means in said housing; an actuating member rigidly attached to said control lever means; a pair of sensors comprising a first sensor and a second sensor which are diametrically opposite with respect to said pivot bearing means; each said sensor having a respective stem means movable in said housing, each of said stem means having a protruding end facing said actuating member; spring means acting on said stem means for urging said protruding end of said stem means to protrude out of said housing; said actuating member being arranged to push said protruding end of said stem means protruding out of said housing down against the action of said spring; each of said sensors of said pair of sensors comprising a first induction coil and a second induction coil aligned therewith, each said stem means extending through said first and second induction coils of the associated sensor; each of said stem means comprising a first section of magnetizable material, said first section being displaceable relative to the associated first induction coil when said stem means is pushed down such that an inductivity of said first induction coil is variable; each of said stem means having a second section of magnetizable material spaced from said first section, said second section being displaceable relative to said second induction coil when said stem means is pushed down such that inductivity of said second induction coil is variable in a defined manner as a function of displacement; first circuit means for responding to variations of said first induction coil of said first sensor relative to said first induction coil of said second sensor, said first circuit means providing a first output signal indicative of said variations; second circuit means for responding to variations of said second induction coil of said first sensor relative to said second induction coil of said second sensor, said second circuit means providing a second output signal indicative of said variations; and a comparator means for comparing said first and second output signals to check the unobjectionable operation of said sensors. - View Dependent Claims (18, 19, 20)
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Specification