公开(公告)号：WO1984000847A1

公开(公告)日：1984-03-01

申请号：PCT/US1983001153

申请日：1983-07-28

Applicant: PRESS ON INC.

Inventor： PRESS ON INC. ,  DOUGHTY, John, Irving

IPC: H01H13/70

CPC classification number: H01H13/807 ,  H01H13/702 ,  H01H13/703 ,  H01H2211/022 ,  H01H2225/002 ,  H01H2227/002 ,  H01H2227/024

Abstract: A membrane switch (10) includes first and second switch networks connected in parallel to effect a particular function. Spacer bridges (50, 52) are interposed in the first and second switch networks to preclude inadvertent engagement of contacts on lamina surfaces (14, 16, 28, 30). The bridges (50) of the first network are either adjacent or spaced from all bridges (52) of the second network in order to insure that the application of pressure to one of two external laminae (22, 24) will activate at least one of the switch networks.

公开(公告)号：WO1984000845A1

公开(公告)日：1984-03-01

申请号：PCT/US1983001152

申请日：1983-07-28

Applicant: PRESS ON INC.

Inventor： PRESS ON INC. ,  DOUGHTY, John, Irving

IPC: H01H09/00

CPC classification number: H01H13/807 ,  H01H13/702 ,  H01H13/703 ,  H01H2001/0005 ,  H01H2201/018 ,  H01H2211/022 ,  H01H2219/03 ,  H01H2225/002 ,  H01H2227/002 ,  H01H2229/028 ,  H01H2229/038

Abstract: An improved membrane switch (10). The switch (10) includes a pair of transparent, laminar contacts (16, 18) sandwiching a spacer (30) formed therein so that the contacts (16, 18) can be engaged at the location of the window (36) by the application of pressure to one of the contacts (16, 18). Engagement of the contacts (16, 18) closes a circuit to effect a desired function. With this structure, the problem of back lighting method without distortion of the indicia being caused by silver conductive ink circuit of the prior art is eliminated.