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Pneumatically Controlled Logic Circuits

IP.com Disclosure Number: IPCOM000095901D
Original Publication Date: 1964-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Noll, MR: AUTHOR [+2]

Abstract

In A, pressure fluid from source Ps flows via equal restrictions 1 and 2 to both sides of clamped flexible diaphragm 3. This seals selectively against transverse ridges 4 or 5 to produce an output signal in Po or Po', respectively. Pressure fluid from Po always bleeds to atmosphere at a very restricted rate via chokes 6 and 7. It can also dump to atmosphere at a rapid rate via 8, 9 and 10 unless a pressure fluid signal is applied to either input T or U or both to seal diaphragm 11 against corresponding transverse ridge 12. Similarly Po' is vented at a rapid rate via 8', 9' and 10' unless an input signal is applied to R or S or both.

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Pneumatically Controlled Logic Circuits

In A, pressure fluid from source Ps flows via equal restrictions 1 and 2 to both sides of clamped flexible diaphragm 3. This seals selectively against transverse ridges 4 or 5 to produce an output signal in Po or Po', respectively. Pressure fluid from Po always bleeds to atmosphere at a very restricted rate via chokes 6 and 7. It can also dump to atmosphere at a rapid rate via 8, 9 and 10 unless a pressure fluid signal is applied to either input T or U or both to seal diaphragm 11 against corresponding transverse ridge 12. Similarly Po' is vented at a rapid rate via 8', 9' and 10' unless an input signal is applied to R or S or both.

Choke 6 and bypass line 13, also 61 and 13', serve an important function. For example, assume U is charged and seals off Po from vent 10. If T is then charged, pressure fluid would, except for bypass 13, be trapped in 9 and might prevent positive sealing of 11 against 12 by the input signal to T. Without 6, ridge 12 associated with T would be bypassed without restriction. Hence, the logic circuit could not be influenced by the presence or absence of the signal in
T. Chokes 6 and 7, also 6' and 7', are of equal flow capacity, which is much less than that of 1 and 2.

In the Nor shown in B, with V, W and/or X charged, corresponding diaphragm(s) seal against 12. Pressure fluid from Ps flows at a restricted rate via choke 20, causing pressure in chamber 21 to build up toward that in Ps and seal diaph...