Electrical control relay with removable magnet assembly

Claim 1

A CIRCUIT CONTROLLING APPARATUS COMPRISING A BASE, THE BASE BEING ADAPTED FOR MOUNTING UPON A CONTROL PANEL; A CONTACT UNIT ATTACHED TO THE BASE, THE CONTACT UNIT HAVING CO-OPERABLE STATIONARY CONTACTS AND A MOVABLE CONTACT AND HAVING MEANS FOR CONNECTING THE CONTACTS IN AN ELECTRICAL CIRCUIT, THE CONTACT UNIT BEING POSITIONED ON THE BASE TO PERMIT THE MOUNTING OF ADDITIONAL CONTACT UNITS ADJACENT THERETO; A CONTACT OPERATING MEMBER POSITIONED TO ENGAGE THE MOVABLE CONTACT AND TO MOVE THE CONTACT TO ITS OPERATIVE AND INOPERATIVE POSITIONS; AND ELECTROMAGNET ASSEMBLY INCLUDING A CORE, A COIL AND AN ARMATURE DISPOSED ADJACENT THE CONTACT OPERATING MEMBER, THE COIL BEING ENCASED IN A NON-CONDUCTING PLASTIC MATERIAL AND ACTING TO SUPPORT THE CORE, THE ARMATURE BEING SEPARABLY CONNECTED TO THE CONTACT OPERATING MEMBER AND ACTING IN RESPONSE TO THE CONDITION OF THE COIL TO MOVE THE CONTACT OPERATING MEMBER TO ITS OPERATIVE AND INOPERATIVE POSITIONS; A FRAME SIMULTANEOUSLY CONNECTING THE CORE, COIL AND ARMATURE TO THE BASE AND HAVING MEANS THEREON ENGAGEABLE WITH THE ELECTROMAGNET ASSEMBLY, WHEN POSITIONED IN ASSEMBLED RELATION, TO SECURE THE ELECTROMAGNET ASSEMBLY BETWEEN THE FRAME AND THE BASE; AND A PLURALITY OF ELONGATED SCREWS THREADED THROUGH THE FRAME AND SERVING TO REMOVABLY SECURE THE FRAME, AND SIMULTANEOUSLY THEREWITH, THE ELECTROMAGNET ASSEMBLY BEING THE BASE, THE FRAME AND THE ELECTROMAGNET ASSEMBLY BEING REMOVABLE IN A DIRECTION NORMAL TO THE PLANE OF THE BASE TO PERMIT THE DISPOSITION OF ADDITIONAL CIRCUIT CONTROLLING APPARATUS OF THE INVENTION IMMEDIATELY ADJACENT TO THE ELECTROMAGNET ASSEMBLY.