Browse Prior Art Database

Sensing and Resetting Lever for Chadless Tape

IP.com Disclosure Number: IPCOM000090834D
Original Publication Date: 1969-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Penny, RE: AUTHOR [+2]

Abstract

In reading characters from a chadless tape, a sensing device has to exert minimal pressure on the tape to avoid the erroneous setting of some of unset tabs. Chadless tape 4 passes through channel 5 past a reading station. Tape 4 is formed with partially perforated tabs. These can be set below such tape to represent a 0 and are restored above tape 4 for setting to a 1 representation. A group of setting fingers 6 below tape 4 can be actuated in combination to set the tape tabs to a condition for recording data characters. Tape 4 is sensed for a data character by a group of levers 7 pivoted on rod 8. Each such lever has a lower sensing finger 9 secured to its right end.

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Sensing and Resetting Lever for Chadless Tape

In reading characters from a chadless tape, a sensing device has to exert minimal pressure on the tape to avoid the erroneous setting of some of unset tabs. Chadless tape 4 passes through channel 5 past a reading station. Tape 4 is formed with partially perforated tabs. These can be set below such tape to represent a 0 and are restored above tape 4 for setting to a 1 representation. A group of setting fingers 6 below tape 4 can be actuated in combination to set the tape tabs to a condition for recording data characters. Tape 4 is sensed for a data character by a group of levers 7 pivoted on rod 8. Each such lever has a lower sensing finger 9 secured to its right end. Levers 7 are urged clockwise by individual spring wires 10 secured in contact block 11 but are prevented from movement by bail 12 which normally holds them in a position with fingers 9 clear of tape 4. When bail 12 moves to the left, levers 7 follow it to slide fingers 9 over tape 4 and any tabs set into the upper 1 position. At the limit of movement of a lever 7, spring wire 10 is moved into contact with a corresponding contact 13 in contact block 14 to complete a circuit for those sensed tape tabs which are set above the tape into the 1 position. If the tab is below tape 4, finger 9 passes into the tab aperture and into contact with face 15 to arrest lever 7 before wire 10 engages contact 13. When it is desired to reset the character representation at t...