Reversible contact molded frame relay

Claim 1

IN AN ELECTROMAGNETICALLY ACTUATED SWITCH: (A) A MOLDED INSULATING HOUSING; (B) A SWITCH COMPRISING STATIONARY CONTACTS AND MOVABLE CONTACTS AND AN ELECTROMAGNET COMPRISING A MAGNET FRAME HAVING A SEALING SURFACE, AN ENERGIZING COIL AND AN ARMATURE FOR ATTRACTION TO SAID SEALING SURFACE WHEN SAID COIL IS ENERGIZED THEREBY TO ACTUATE SAID MOVABLE CONTACTS INTO ENGAGEMENT WITH SAID STATIONARY CONTACTS; (C) AND MEANS FOR DETERMINING THE WEAR ALLOWANCE OF THE CONTACTS AND SAID SWITCH COMPRISING: (D) MEANS MOLDED IN SAID HOUSING FOR POSITIONING SAID STATIONARY CONTACTS AND SAID SEALING SURFACE RELATIVE TO ONE ANOTHER TO PROVIDE AN ACCURATE DISTANCE THEREBETWEEN DUE TO THE INHERENT DIMENSIONAL ACCURACY OF THE MOLDED HOUSING WHEREBY MANUFACTURING TOLANCE OF THE MAGNET FRAME ARE ELIMINATED IN DETERMINING CONTACT WEAR ALLOWANCE THEREBY TO REDUCE THE TOLERANCE OF THE CONTACT WEAR ALLOWANCE.