Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Braking
Patent
1976-11-08
1978-06-27
Dobeck, B.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Braking
318372, 318 7, B65H 7700
Patent
active
040977854
ABSTRACT:
Disclosed is a tape-transport apparatus wherein a first brake is provided for a reel for winding a magnetic tape thereon, the reel being operatively coupled to a first DC motor; a second brake is provided for a reel for supplying the magnetic tape, the reel being operatively coupled to a second DC motor; means is provided which is adapted to impart the retarding force to the second DC motor when an electromotive force, which is generated by the rotation of the first DC motor due to its inertia whenever the power supply to the first DC motor is interrupted, is in excess of a predetermined level; and there is provided means which is adapted to operate the first and second brakes when the magnitude of the electromotive force reaches a predetermined value, thereby stopping the transport of the tape.
REFERENCES:
patent: 3501682 (1970-03-01), Jacoby
patent: 3873896 (1975-03-01), Jennings
patent: 3946291 (1976-03-01), Marheine
patent: 4034272 (1977-07-01), Steward
Kato Tomomi
Sato Mituhiro
Dobeck B.
Sansui Electric Co. Ltd.
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