Method of making a pressure switch

• US 4,137,116 A
• Filed: 04/22/1977
• Issued: 01/30/1979
• Est. Priority Date: 04/22/1977
• Status: Expired due to Term

• Current Assignee: Norman K. Miller
• Original Assignee: Miller Brothers
• Inventors: Miller, Norman K.
• Primary Examiner(s): Massie, Jerome W.
• Application Number:
  US05/789,807
• Time in Patent Office: 648 Days
• Field of Search: 200/86 R, 200/85 R, 200/85 A, 53/39, 53/41, 156/269, 156/290, 156/301, 156/302, 156/309, 156/251, 156/292, 156/324, 156/303, 156/306, 428/313, 428/138, 428/194, 428/209, 428/200, 428/72, 29/625, 29/627, 29/622
• US Class Current: 156/269
• CPC Class Codes: H01H 3/141 Cushion or mat switches
• CPC Class Codes: Y10T 156/1084 of continuous or running length bonded web
• CPC Class Codes: Y10T 156/1095 Opposed laminae are running length webs
• CPC Class Codes: Y10T 156/1097 Lamina is running length web
• CPC Class Codes: Y10T 29/49105 Switch making
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 428/234 including elements cooperating to form cells
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/24793 Comprising discontinuous or differential impregnation or bond
• CPC Class Codes: Y10T 428/24843 with heat sealable or heat releasable adhesive layer
• CPC Class Codes: Y10T 428/24917 including metal layer
• CPC Class Codes: Y10T 428/24999 Inorganic

Abstract

A pressure switch and method of manufacture wherein a resiliently yieldable intermediate open layer is sandwiched between flexible conductive layers, all of which is enclosed between flexible outer layers, so that in the unstressed or relatively unstressed condition the contact layers are spaced apart by the intermediate layer, while flexure or other sufficient stressing of the assembly effects contact of the contact layers through the open intermediate layer.

Claims

1. In the manufacture of flexible switch means, the steps which comprise:

continuously feeding an intermediate open work web of resiliently yieldable sealable insulating material, continuously feeding a pair of flexible conductive webs of less width than and into facing relation with opposite faces of said open work web simultaneously with feeding of the latter, simultaneously feeding a pair of flexible non-conductive sealable outer webs of greater width than and into facing relation with opposite outer faces of respective conductive webs, and sealing adjacent longitudinal edges of said outer webs outwardly beyond said conductive webs to projecting longitudinal edge portions of said open work web with said conductive webs remaining unsealed, whereby said conductive webs are each retained in position by and between said open work web and a respective outer web without additional securement.

2. The method according to claim 1, further characterized in severing predetermined lengths of the sealed assembly, and closing the ends of said predetermined lengths to define thereof sealed switch units.

3. The method according to claim 1, wherein said sealing of said open work margins and outer web margins is by welding.