Plural motor tape drive including information searching and tension control

Claim 1

TAPE INFORMATION STORAGE APPARATUS COMPRISING FIRST MEANS FOR FEEDING FROM ONE TAPE REEL TO ANOTHER AT A HIGH SPEED AND AT A REDUCED SPEED, TAPE HAVING A PLURALITY OF SECTIONS AND INCLUDING FEED PERFORATIONS, THE SAID FIRST MEANS INCLUDING A PAIR OF ELECTRIC MOTORS EACH OF WHICH CARRIES ON TE SHAFT THEREOF ONE OF SAID TAPE REELS AND EITHER OF WHICH SAID MOTORS IS OPERATIVE TO DRIVE ITS REEL TO DRAW TAPE FROM THE OTHER REEL, THE MOTOR OF THE NONDRIVING REEL BEING OPERATIVE APPLY A RETARDING FORCE TO SAID NON-DRIVING REEL DURING WITHDRAWAL OF THE TAPE THEREFROM, SECOND MEANS FOR FEEDING THE TAPE IN A REVERSE DIRECTION AT A SELECTED ONE OF A NUMBER OF SPEEDS AND INCLUDING A SPROCKET-WHEEL FOR ENGAGING THE TAPE FEED PERFORATIONS TO THEREBY DRIVE THE TAPE AT THE SELECTED ONE OF THE SAID NUMBER OF SPEEDS, SETTABLE MEANS FOR DETECTING A SELECTED ONE OF SAID SECTIONS AND A SECTION PRIOR TO SAID SELECTED SECTION AS SAID TAPE MOVES BETWEEN SAID REELS, OSCILLATING MEANS OPERATIVE UPON DETECTION OF THE SAID SELECTED SECTION BY THE DETECTING MEANS TO OSCILLATE THE TAPE LONGITUDINALLY THEREOF IN THE REGION OF SAID SPROCKET-WHEEL TO CAUSE A PEROFRATION THEREIN TO SEEK A TOOTH IN SAID SPROCKET-WHEEL TO PERMIT ENGAGEMENT THEREBETWEEN, MEANS INCLUDING BRAKING MEANS OPERATIVE ON DETECTION OF SAID PRIOR SECTION BY SAID DETECTING MEANS TO CAUSE SAID FIRST FEEDING MEANS TO SHIFT FROM HIGH SPEED TO SAID REDUCED SPEED AND INCLUDING BRAKING MEANS OPERATIVE ON DETECTION OF SAID SELECTED SECTION TO CAUSE SAID FIRST FEEDING MEANS TO STOP FEEDING AND SAID SECOND MEANS TO FEED THE TAPE IN THE REVERSE DIRECTION AT THE SELECTED ONE OF SAID NUMBER OF SPEEDS TO PERMIT INFORMATION TO BE STORED IN OR WITHDRAWN FROM THE SELECTED SECTION OF TAPE.