Data retention apparatus
AssigneeDecca Limited
InventorsCharlton Robert Baty, Alfred John Jarvis
Life of this patent
Estimating the term…
Abstract
Apparatus for retaining the data held in a directional counter in the event of the voltage level supplied to the counter falling below a predetermined level comprises a directional counter means for comparing the level of voltage supplied to the directional counter with a predetermined voltage level, data storing means responsive to the comparator means for storing the output signal of the directional counter when the voltage falls below the predetermined voltage and for loading the stored output signal into the directional counter when the voltage level subsequently rises above the predetermined level.
Claims13
Tuning apparatus including:
- a rotatable tuning shaft;
- encoding means for providing a first output signal for each unit of rotation through which the shaft rotates;
- means for sensing a direction of rotation of the shaft;
- directional counter means for providing a tuning output signal, the directional counter means being coupled to the encoding means and the direction of sensing means to count the first output signals, the direction of the count being determined by the direction sensed by the directional sensing means such that the instantaneous count in the directional counter means represents the rotational position of the rotatable tuning shaft;
- means for comparing the level of the voltage supplied to the directional counter means with a predetermined voltage level;
- and,
- data storing means responsive to the comparing means for storing the output signal of the directional counter means when the voltage level falls below the predetermined level and for loading the stored output signal into the directional counter means when the voltage level subsequently rises above the predetermined level.
Counter apparatus comprising:
- a rotatable shaft;
- encoding means providing a first output signal for each unit of rotation through which the shaft rotates;
- means for sensing the direction of rotation of the shaft;
- directional counter means coupled to the encoder means and the directional sensing means to count the first output signals, the direction of the count being determined by the direction sensed by the direction sensing means such that the instantaneous count in the directional counter means represents the rotational position of the shaft;
- means for comparing the level of the voltage supplied to the directional counter means with a predetermined voltage level;
- data storing means responsive to the means for comparing for storing the output signal of the directional counter means when the voltage level falls below the predetermined level and for loading the stored output signal into the directional counter means when the voltage level subsequently rises above the predetermined level;
- and an operable mechanism for causing signals representing a plurality of units of rotation to be supplied to the directional counter means and including at least two push-buttons, the push-buttons being arranged such that the operation of one of the push-buttons causes signals representing a plurality of units of rotation in one direction to be supplied to the counter, and such that the operation of the other causes signals representing a plurality of units for rotation in the other direction to be supplied to the counter.
An apparatus for retaining the data held in a directional counter in the event of the voltage level supplied to the counter falling below a predetermined level comprising;
- directional counter means;
- means for comparing the level of the voltage supplied to the directional counter means with a predetermined voltage level;
- data storing means responsive to the means for comparing for storing the output signals of the directional counter means when the voltage level falls below the predetermined level and for loading the stored output signal into the directional counter when the voltage level subsequently rises above the predetermined level;
- and,
- an operable mechanism for causing signals representing a plurality of units for rotation to be supplied to the directional counter means whenever the mechanism is operated, the operable mechanism including at least two push-buttons arranged such that the operation of one of the push-buttons causes signals representing a plurality of units for rotation in one direction to be supplied to the directional counter means, and such that operation of the other causes signals representing a plurality of units for rotation in the other direction to be supplied to the directional counter means.
Dependencies are inferred from the claim text.