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Browse Prior Art Database

Pneumatic Decimal Counter

IP.com Disclosure Number: IPCOM000095365D
Original Publication Date: 1965-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Huckabee, JM: AUTHOR

Abstract

Sequential pulses received at input stepping pawls 1 and 2 are added subtracted respectively by the cumulative position of counter tape 3. The position of tape 3 is measured by the number of ports 4 position within read manifold 5. When all ports 4 are positioned in read man fold 5, one more add step causes carry control port 6 to be aligned with supply duct 7. Such action sets carry latch amplifier 8 and produces a carry pulse to the next higher counter not shown. Latch 8 operates bellows 9 to the right to reset tape 3 to its zero position. When all holes are out of manifold 5 one more subtract step causes borrow control port 10 to be aligned with supply duct 11. Such sets borrow latch 12 which produces a borrow pulse for controlling the next lower counter not shown.

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Pneumatic Decimal Counter

Sequential pulses received at input stepping pawls 1 and 2 are added subtracted respectively by the cumulative position of counter tape 3. The position of tape 3 is measured by the number of ports 4 position within read manifold 5. When all ports 4 are positioned in read man fold 5, one more add step causes carry control port 6 to be aligned with supply duct 7. Such action sets carry latch amplifier 8 and produces a carry pulse to the next higher counter not shown. Latch 8 operates bellows 9 to the right to reset tape 3 to its zero position. When all holes are out of manifold 5 one more subtract step causes borrow control port 10 to be aligned with supply duct 11. Such sets borrow latch 12 which produces a borrow pulse for controlling the next lower counter not shown. Latch 12 also operates bellows 9 to the left to reset the tape 3 to its full manifold position.

Zero position of the counter tape 3 is controlled by locate port 3a which cooperates with end limit ducts 13 and 14 to terminate operation of either carry latch 8 or borrow latch 12.

Data in the counter is read by scanning tape 15 having port 16 for sequential alignment with holes 4 in tape 3. Sequential pulses at manifold output conduit 17 indicate the data in the counter. Scanning operation is operable upon command from conduit 18, if tape 15 is in its beginning position as determined by port 19. A read command sets read latch 20 to supply driving fluid to bellows 22. Tape 15 i...