Programmable controller for the mechanism of an industrial truck
AssigneeLansing Bagnall Limited
InventorMarek V. T. Scibor-Rylski
Life of this patent
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Abstract
A controller for an auxiliary mechanism of an industrial truck includes a sensor which detects movement of the mechanism and provides signals denoting increments of that movement. A counter receives those signals and thereby provides a count denoting the position of the mechanism along its range of movement. A memory is controllable to provide one of a plurality of stored representations for comparison with the count and a comparator compares the count with a representation made available from the memory to provide a signal for controlling the movement of the mechanism. A keyboard is provided for effecting storage in the memory of representations of different positions along the mechanism's range of movement.
Claims13
A controller for an auxiliary mechanism of an industrial truck, comprising:
- a sensor which is coupled to detect movement of the said mechanism and provides signals denoting increments of that movement:
- a counter which receives the said signals and thereby provides a count denoting the position of the mechanism along its range of movement;
- a memory which is controllable to provide a designated one of a plurality of stored representations for comparison with said count;
- means, cooperating with said memory for designating one of said stored representations;
- means for comparing the count with said designated representation made available from the memory to provide a signal for controlling the movement of the mechanism;
- means for effecting storage in the memory of signals denoting different positions along the range of movement;
- and
- means for transferring a count held by the counter to the memory for storage as one of said plurality of representations.
A controller for an auxiliary mechanism of an industrial truck, comprising:
- a sensor which is coupled to detect movement of the said mechanism and provides signals denoting increments of that movement;
- a counter which receives said signals and thereby provides a count denoting the position of the mechanism along its range of movement;
- a memory which is controllable to provide one of a plurality of stored representations for comparison with the said count;
- means for comparing the count with a representation made available from the memory to provide a signal for controlling the movement of the mechanism;
- means for effecting storage in the memory of signals denoting different positions along the range of movement;
- a keyboard means, operable by a human operator, for effecting storage of said count by said memory in a storage location of which the address is determined by the operation of a particular selection from said keys;
- and
- means responsive to operation of the keyboard to address the memory to make the stored count available for comparison.
A controller for an auxiliary mechanism of an industrial truck, comprising:
- a sensor which is coupled to detect movement of the said mechanism and provides signals denoting increments of that movement;
- a plurality of counters each of which receives said signals and thereby provides a respective one of a plurality of counts denoting the position of the mechanism along its range of movement, said counts being offset from each other;
- a memory which is controllable to provide one of a plurality of stored representations for comparison with said counts;
- a plurality of comparators each for comparing a respective one of said counts with a representation made available from the memory to provide a respective one of a plurality of different signals for controlling the movement of the mechanism;
- and
- means for effecting storage in the memory of signals denoting different positions along the range of movement.
A controller for an auxiliary mechanism of an industrial truck, comprising:
- a sensor which is coupled to detect movement of said mechanism and provides signals denoting increments of that movement;
- a counter which receives the said signals and thereby provides a count denoting the position of the mechanism along its range of movement;
- a memory which is controllable to provide one of a plurality of stored representations for comparison with said count;
- means for comparing the count with a representation made available from the memory to provide a signal for controlling the movement of the mechanism;
- means for effecting storage in the memory of signals denoting different positions along the range of movement;
- sensors responsive to increments of movement of said mechanism to provide two quadrature wavetrains;
- and
- a discriminator responsive to said wavetrains for providing a first output signal representing increments of movement in accordance with transitions in one of said trains and a second output signal discriminator comprising two coincidence gates each disposed to receive the wavetrains, means preceding the coincidence gates for delaying one of the wavetrains relative to the other, a first output circuit coupled to receive signals indiscriminately from the coincidence gates and a second output circuit, including a delay, coupled to receive signals from one of the coincidence gates.
Dependencies are inferred from the claim text.