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AssigneeRobertshaw Controls Company
InventorsCharles D. Branson, Harvey J. Shopsky
Estimating the term…
A condition responsive electrical switch construction having a frame carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by the frame and is operatively associated with the switch to operate the same as the lever is moved by the wall to a certain position in opposition to the force of a range spring also carried by the frame. A cradle-like member has a base operatively associated with the range spring so as to be held thereby against the wall to be moved in unison with the wall and has arms engaging the lever to cause the lever to move in relation to movement of the wall. The switch has a pair of movable contact members disposed on opposite sides of a fixed contact member and each is biased in a direction to tend to place the same in contact with the fixed contact member and each having an offset loop therein. An actuator member controlled by the lever is disposed between the pair of movable contact members and is movable in opposite directions to move the respective movable contact member out of contact with the fixed contact member.
In a condition responsive electrical switch construction having frame means carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by said frame means and is operatively associated with said switch to operate the same as said lever is moved by said wall to a certain position in opposition to the force of a range spring carried by said frame means, the improvement comprising a cradle-like member having a base operatively associated with said range spring so as to be held thereby against said wall to be moved in unison with said wall and having arm means engaging said lever to cause said lever to move in relation to movement of said wall.
In an actuator arrangement for a condition responsive control unit and having frame means carrying a condition responsive device provided with a movable wall for causing movement of a lever that is pivotally carried by said frame means and is adapted to be operatively associated with an actuatable device to operate the same as said lever is moved by said wall to a certain position in opposition to the force of a range spring carried by said frame means, the improvement comprising a cradle-like member having a base operatively associated with said range spring so as to be held thereby against said wall to be moved in unison with said wall and having arm means engaging said lever to cause said lever to move in relation to movement of said wall.
In a condition responsive electrical switch construction having frame means carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by said frame means and is operatively associated with said switch to operate the same as said lever is moved by said wall to a certain position in opposition to the force of a range spring carried by said frame means, the improvement comprising a one-piece hardened metallic insert carried by said frame means and having a plurality of fulcrum surfaces against which said lever pivots.
An insert for a condition responsive electrical switch construction having frame means carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by said frame means and is operatively associated with said switch to operate the same as said lever is moved by said wall to a certain position in opposition to the force of a range spring carried by said frame means, said insert comprising a one-piece hardened metallic member adapted to be carried by said frame means and having a plurality of fulcrum surfaces against which said lever is adapted to pivot.
In a condition responsive electrical switch construction having frame means carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by said frame means and is operatively associated with said switch to operate the same as said lever is moved by said wall to a certain position in opposition to the force of a range spring carried by said frame means, said constrution having a movable selector means that is operatively associated with an abutment means of said lever to move said lever against a stop when said selector means is moved to an off position thereof, the improvement comprising biasing means disposed between said selector means and said abutment means to transmit motion of said selector means to said abutment means and to take up further movement of said selector means after said lever has been moved thereby against said stop.
Dependencies are inferred from the claim text.