Browse Prior Art Database

Shift Register With Pneumatically Controlled Latch and Control Elements

IP.com Disclosure Number: IPCOM000095902D
Original Publication Date: 1964-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 3 page(s) / 116K

Publishing Venue

IBM

Related People

Norwood, RE: AUTHOR [+2]

Abstract

This shift register has three stages A, B and C. Each stage has a single, pneumatically-controlled latch 1 including a circular diaphragm 2 clamped about its periphery. Each diaphragm 2 is flexed into sealing contact selectively with transverse ridge 3 or 4. Such action occurs according to whether pressure fluid supplied from a source Ps via corresponding choke 5 or 6 acts over the whole lower or upper area of the diaphragm, respectively. Each stage also comprises six control elements 7, 8 and 9 and their counterparts 7', 8' and 9'. Each control element includes a diaphragm 10 that is biased into sealing contact with ridge 11 only if pressure fluid is supplied to a corresponding control chamber 12.

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Shift Register With Pneumatically Controlled Latch and Control Elements

This shift register has three stages A, B and C. Each stage has a single, pneumatically-controlled latch 1 including a circular diaphragm 2 clamped about its periphery. Each diaphragm 2 is flexed into sealing contact selectively with transverse ridge 3 or 4. Such action occurs according to whether pressure fluid supplied from a source Ps via corresponding choke 5 or 6 acts over the whole lower or upper area of the diaphragm, respectively. Each stage also comprises six control elements 7, 8 and 9 and their counterparts 7', 8' and 9'. Each control element includes a diaphragm 10 that is biased into sealing contact with ridge 11 only if pressure fluid is supplied to a corresponding control chamber 12.

Assume all branches of shift line 13 are charged with pressure fluid via valve V1 to cause 10 in each line 7 and 7' to seal off lines 14 and 14' from atmosphere. Also assume all branches of isolate line 15 are vented via valve V2 to permit fluid flow via 16 around ridge 11 in 9 to either line 17 or via 16' or both around ridge 11 in 9' to line 17'. Assuming the above and that lines 17, 17', 17 in stages A, B, C, respectively, are charged to store a "101" in the shift register, the parts are as shown. Those lines and chambers shown dotted are charged with pressure fluid. Atmospheric bleed ports 18 and 18' are of more restricted flow capacity than 6 and 5 to permit effective build-up in pressure in 16', e.g., when 2 seals against 3.

To shift data to the next stage, isolate line 15 is charged via V2 to seal 10 against 11 in 9 and 9' of each stage. This disconnects 16 and 17, also 16' and 17', to isolate each stage from the others and also trap the previously existing signal in the inputs 17 and 17' to the next stage. Then shift line 13 is vented via V1.

In stage A, pressure fluid from under 2 and in 16' rapidly escapes to atmosph...