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Semipneumatic Double Acting Switch Actuator

IP.com Disclosure Number: IPCOM000081669D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 39K

Publishing Venue

IBM

Related People

Foytlin, LF: AUTHOR

Abstract

Illustrated is a semipneumatic, double-acting switch actuator which eliminates conventional switch components that affect life and reliability. In Fig. 1, a cross section of a switch utilizing a semipneumatic action is illustrated. The switch comprises an elastic diaphragm switch sandwich 1 which contains conductors, not shown, which may be closed by pressure from either the upper or the lower surface.

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Semipneumatic Double Acting Switch Actuator

Illustrated is a semipneumatic, double-acting switch actuator which eliminates conventional switch components that affect life and reliability. In Fig. 1, a cross section of a switch utilizing a semipneumatic action is illustrated. The switch comprises an elastic diaphragm switch sandwich 1 which contains conductors, not shown, which may be closed by pressure from either the upper or the lower surface.

The elastic diaphragm switch sandwich 1 is overlain by an upper and a lower molded spherical thin-walled bubble member. The upper member 2 includes a protrusion 3 carrying a push rod 4 through an opening 5 in the switch sandwich
1. The lower bubble member 6 incorporates an "oil can" molded bottom 7 and a protrusion 8 having a lip, which impinges against the lower side of switch sandwich L maintaining the switch closed and in contact in the rest position, as shown in Fig. 1.

In Fig. 2, finger force is shown applied to the upper bubble member 2. This action causes push rod 4 to engage protrusion 8 and break contact from the lower surface of switch sandwich 1 made by protrusion 8, while at the same time bowing out the "oil can" area 7 of bubble 6. The ledge of protrusion 3 then contacts the upper surface of switch sandwich 1 and closes the contacts again.

The action provided in depressing upper bubble 2 is to first break contact from the lower surface of the switch opening the contact in the switch sandwich 1, and then to reestablish contact by pressure on the upper surface of the switch. This is the normally understood transfer contact of the switching operation,

Small holes 9 through the...