H - Electricity – 01 – H
Patent
H - Electricity
01
H
236/15
H01H 37/04 (2006.01) H01H 37/54 (2006.01)
Patent
CA 1267398
Abstract of the Disclosure In a snap-acting thermostat with a snap disc, a stationary contact support carrying a stationary contact and a moveable contact support arm with a moveable contact on it, a bumper mounted for translation by the disc and operatively connecting the disc and the moveable contact and a case housing the snap disc, stationary contact, moveable contact and bumper, interior side walls of the case have guide channels outboard of the stationary and moveable contacts. The bumper has a part substantially circular in section, extending within the compass of the guide means outboard of the contacts. The case has a closed top through which two contact terminals extend, and an open bottom through which the elements enclosed by the case can be mounted. the open bottom has a perimetric surfaces lying in a common plane and is closed by an imperforate disc closure. The case is provided with a plurality of projections integral with the case, extending beyond the rest of the open bottom in a direction away from the case and defining a centering and retaining device for the disc. The disc closure has recessed seats deeper than the projections, receiving the projections without bottoming, a substantially planar surface within the compass of the seats, engaging the disc and surfaces affirming a plane outboard of the seats against which a planar surface of the disc closure abuts to close the case. A mounting stud is elongated, with a substantially straight shaft, non circular in transverse cross section, having interrupted threads along a substantial length thereof, and a shank projecting into a complementarily non-circular opening in the disc seating plate, and is staked to lock it in the plate. The stationary contact is supported by an arm having two ends, one end being mounted on the case and the other carrying the stationary contact and projecting from a wall of the case in a direction toward the bumper at an acute angle with respect to the line of translation of the bumper in a direction toward the disc. In the course of assembly, the arm bearing the stationary contact can be bent in a direction toward the perpendicular to gauge the relative positions of the stationary and moveable contacts. L shaped terminals are provided with openings in a foot to receive terminal connectors from the stationary and moveable contacts, the connectors extending through the openings in the closed top of the case. The placement of the openings in such that the L shaped terminals can be mounted to provide three predetermined spacings between legs perpendicular to the feet with the openings in them.
553012
Borden Ladner Gervais Llp
Therm-O-Disc Incorporated
LandOfFree
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