Electrical switches for control devices such as temperature regulators
AssigneeRanco Incorporated
InventorsGuglielmo Rossi, Hans Bosing
Life of this patent
Estimating the term…
Abstract
An electrical snap action switch for use in a temperature regulator has a movable contact assembly consisting of a conductive contact carrying arm movable between fixed stops and cantilevered within the switch housing, the contact arm being parallel to and cooperating with a Q-shaped snap-action spring, so that the arm carries the working current while the snap spring acts on the arm to make the switch monostable in operation between the stops.
Claims15
An electrical switch for use in a control device such as a temperature regulator, comprising:
- a housing having two stops, at least one of which is a fixed switch contact;
- and,
- a movable switch contact assembly which is movable between the two stops and is normally in abutment with one of said stops;
- the improvement comprising;
- the movable switch contact assembly comprising a contact and contact carrying arm of electrically conductive material, and a Q-shaped snap action spring cooperating with said arm to snap move the arm for opening and closing the contacts said spring having two legs which are drawn toward each other to stress the spring and a trip tongue projecting from a portion of the spring interconnecting said legs, and
- said arm and said snap action spring being cantilevered within the housing and disposed substantially parallel to one another.
An electrical snap switch unit comprising a base, at least one substantially stationary switch contact supported by said base, a movable switch contact, a contact supporting member carrying said movable contact for motion into and away from engagement with said substantially stationary contact, a stressed blade spring member anchored with respect to said base and extending toward said contacts from the anchor location, a portion of said spring member spaced from the anchor location effective to snap move in a direction transverse to the direction of extent of said blade spring member, structure for interconnecting said blade spring member portion and said contact supporting member so that snap movement of said blade spring member portion abruptly moves said contact supporting member to open or close said contacts.
Dependencies are inferred from the claim text.