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Pressure Sensitive Elastic Diaphragm Switch

IP.com Disclosure Number: IPCOM000075241D
Original Publication Date: 1971-Aug-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

DeBeaumont, JR: AUTHOR [+2]

Abstract

The pneumatic elastic diaphragm switch 10 includes a flexible diaphragm 11, which has adhered thereto a conductive film 12 including a contact 13. Diaphragm 11 is compressed between rigid members 15 and 16 and, respectively, separated therefrom by spacers 17 and 18. Surface 20 of member 15 carries a stationary contact confronting diaphragm contact 13. Ports 22 and 23 extend through member 16 to communicate with the chamber 25. Diameter 26 defines the diaphragm area, wherein upward flexure of the diaphragm occurs to effect engagement between contact 13 and the stationary contact carried by surface 20. Port 22 enters chamber 25 concentrically with respect to the area of flexure defined by diameter 26, while port 23 enters chamber 25 in confronting relation to a diaphragm portion which is supported against substrate 17.

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Pressure Sensitive Elastic Diaphragm Switch

The pneumatic elastic diaphragm switch 10 includes a flexible diaphragm 11, which has adhered thereto a conductive film 12 including a contact 13. Diaphragm 11 is compressed between rigid members 15 and 16 and, respectively, separated therefrom by spacers 17 and 18. Surface 20 of member 15 carries a stationary contact confronting diaphragm contact 13. Ports 22 and 23 extend through member 16 to communicate with the chamber 25. Diameter 26 defines the diaphragm area, wherein upward flexure of the diaphragm occurs to effect engagement between contact 13 and the stationary contact carried by surface 20. Port 22 enters chamber 25 concentrically with respect to the area of flexure defined by diameter 26, while port 23 enters chamber 25 in confronting relation to a diaphragm portion which is supported against substrate 17.

In operation, when an air pulse is injected through passage 23 with passage 22 open, the switch does not actuate. When an air pulse is injected through passage 23 when passage 22 is obstructed, the switch actuates. When an air pulse is injected through passage 22, the switch operates in the normal manner. Accordingly, the switch may be used where it is desired to have a condition or occurrence close passage 22, and the occurrence or condition tested by one or more air pulses through passage 23.

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