Thermostatic switch construction

In a snap-acting thermostat having snap disc means, switch means including a stationary contact support means and a stationary contact supported thereby and a movable contact support arm and a movable contact supported thereby;

• an actuator mounted for translation by said disc means and operatively connecting said disc and said movable contact, a case housing said snap disc, stationary contact, movable contact and actuator, and a disc closure having a mounting stud projecting in a direction away form said case, the improvement comprising said stud being elongated and axially, substantially straight, non-circular in transverse cross-section, having interrupted threads along a substantial length thereof, said stud having a non-circular shank projecting into an opening in said disc closure and staked to lock it in said plate.

In a mounting comprising a plate with a mounting stud projecting thereform, the improvement comprising said stud being elongated and axially, substantially straight, non-circular in transverse cross-section, having interrupted threads along a substantial length thereof, said stud having a shank projecting into a complementarily non-circular opening in said plate and staked to lock it in said plate.

In a snap-acting thermostat having snap disc means;

• switch means including stationary contact support means and a stationary contact supported thereby and a movable contact support arm and a movable contact supported thereby;
• a bumper mounted for translation by said disc means and operatively connecting said disc and said movable contact, a case housing said snap disc, stationary contact, movable contact and bumper, and an imperforate disc closure, said case having an open bottom, defined by surface lying in a common plane, closed by said disc closure, the improvement comprising a plurality of projections integral with said case, extending beyond said open bottom in a direction away from said case and defining a seat for said disc, said disc closure having recessed seats deeper than said projections, receiving said projections without bottoming, and a substantially planar surface within the compass of said seats, engaging said disc.

In a snap-acting thermostat having snap disc means;

• switch means including stationary contact support means with an arm with a part with a terminal connector connected thereto and a part with a stationary contact supported thereby and a movable contact support arm electrically connected to a terminal connector, said support arm carrying a movable contact;
• a bumper mounted for translation by said disc means and operatively connecting said disc and said movable contact arm, and a case housing said snap disc, stationary contact, movable contact and bumper, said case having a top wall with terminal connector apertures in it, spaced from one another, the improvement comprising a finger of one of said stationary and movable contact terminal connectors extending through one of said apertures and a finger of the other of said terminal connectors extending through the other of said apertures, said apertures being 15 millimeters apart, center to center, and two terminals, L-shaped in side elevation, each with an outwardly projecting leg and a foot with a terminal connector opening in it receiving one of said terminal connector fingers, said openings being 2.5 millimeters from the center of the outwardly projecting leg, thicknesswise, whereby, depending upon the orientation of said terminals with respect to one another, they can be spaced 10, 15 or 20 millimeters apart.

In a snap-acting thermostat having snap disc means;

• switch means including stationary contact support means and a stationary contact supported thereby and a movable contact support arm and a movable contact supported thereby;
• a bumper mounted for translation by said disc means and operatively connecting said disc and said movable contact, and a case housing said snap disc means, stationary contact, movable contact and bumper, the improvement comprising interior side walls of said case on either side of said contacts, guide means in each of said side walls outboard of said moveable contact arm, said bumper having a part, substantially circular in section, extending within the compass of said guide means outboard of said contacts;
• an imperforate disc closure, said case having an open mouth closed by said disc closure, a plurality of projections integral with said case, extending beyond said open end in a direction away from said case and defining a seat for said disc, said disc closure having recessed seats deeper than said projections, receiving said projections without bottoming, a substantially planar surface within the compass of said seats, engaging said disc, and a substantially planar surface outboard of the said seats, engaging planar surfaces defining said open mouth of said case.

In a control or the like having a casing housing elements of an electrical circuit to which electric power is to be supplied, plug-in terminals mounted on said casing and electrically connected to said elements, said plug-in terminals having male tabs, arranged to extend into female connector sockets, the improvement comprising two mounting means, spaced 15 millimeters apart, on said casing, and two of said plug-in terminals, L-shaped in side elevation, each with an outwardly projecting tab and a foot contiguous said casing, said foot having attachment means complementary to said mounting means, spaced 2.5 millimeters from the center of the outwardly projecting tab, thicknesswise, whereby, depending upon the orientation of the terminals with respect to one another, the tabs can be spaced 10, 15 or 20 millimeters apart.