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US 4,396,956 AGranted
Overcoming drum stall in record and/or replay systems
AssigneeRCA Corporation
InventorLee V. Hedlund
Life of this patent
Estimating the term…
Abstract
In a record and/or replay system of the type wherein magnetic tape moves in a loop about a drum which is rotated by a motor to scan transducer gaps across the tape, drum stall conditions are overcome by momentarily reversing the intended rotational direction of the motor when a command is given to rotate the drum in the intended rotational direction but such rotation does not occur because of tape sticktion on the drum.
Claims9
In a helical-scan record and/or replay system of the type wherein magnetic tape moves in a loop about a headwheel which is rotated by a motor to scan transducer gaps across the tape, the improvement comprising:
- control means coupled to said motor for momentarily reversing the intended rotational direction of the motor when a command signal is given to rotate the headwheel in the intended rotational direction but such rotation does not occur because tape adherence to the headwheel creates a stall condition.
Dependencies are inferred from the claim text.