Vacuum cleaner operating switch construction

Claim 1

AN ELECTRICAL APPLIANCE COMPRISING: (A) A HOUSING FOR ENCLOSING SAID APPLIANCE, SAID HOUSING HAVING A WALL INCLUDING AN INNER SURFACE AND AN OUTER SURFACE; (B) AN ENLARGED OPENING EXTENDING THROUGH SAID WALL, SAID OPENING HAVING NARROW SIDE SURFACES EXTENDING GENERALLY PERPENDICULAR TO SAID HOUSING WALL; (C) A RELATIVELY FRAGILE SWITCH INCLUDING A CASING HAVING A FRONT WALL, REARWARDLY EXTENDING SIDE WALLS, AND A SWITCH ACTUATING KNOB EXTENDING THROUGH SAID FRONT WALL; (D) SAID SWITCH BEING FIXED TO SAID APPLIANCE HOUSING SO THAT THE FRONT WALL OF SAID SWITCH CASING ABUTS THE INNER SURFACE OF SAID HOUSING AND SAID ACTUATOR KNOB EXTENDS THROUGH SAID ENLARGED OPENING; (E) AN INTEGRALLY FORMED SWITCH OPERATOR AND LIMIT STOP MEMBER POSITIONED OVER SAID SWITCH ACTUATOR KNOB, SAID MEMBER INCLUDING A REAR SURFACE SLIDABLE ON THE FRONT WALL OF SAID SWITCH AND AN INTEGRALLY FORMED STOP ABUTMENT SURFACE FOR COOPERATING WITH ONE OF THE NARROW SIDE SURFACES OF SAID ENLARGED OPENING TO PREVENT OVERTRAVEL OF SAID SWITCH KNOB BY CONTACT OF SAID ABUTMENT SURFACE WITH SAID NARROW SIDE SURFACE SO THAT THE SWITCH OPERATOR MAY BE READILY ACTUATED BY THE FOOT OF A USER.