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US 3,997,742 AGranted
Automatic timer switch
AssigneeRobertshaw Controls Company
InventorEdgar E. Marquis
Life of this patent
Estimating the term…
Abstract
A timer switch includes a snap acting switch blade moved by an operating member which is biased against a side of a guideway which has inclined camming surface portions for camming the operating member under the bias force to respective opposite ends of the guideway.
Claims15
A timer switch comprising
- support means,
- a blade having one end pivoted on the support means with the other end of the blade movable between first and second positions,
- an operating member,
- said support means having a guideway for receiving and guiding the operating member,
- said guideway having one side and first and second ends limiting movement of the operating member along the one side to movement between the first and second ends of the guideway,
- a spring connecting the free end of the blade to the operating member such as to bias the blade into the first position when the operating member is at the first end of the guideway and to bias the blade into the second position when the operating member is at the second end of the guideway,
- said spring biasing the operating member against the one side of the guideway,
- said one side of the guideway having an intermediate point and first and second portions inclined in the direction of the spring bias from the intermediate point to the respective first and second ends of the guideway such that the first and second portions of the one side cam the operating member under the bias of the spring to the respective first and second ends of the guideway,
- contact means operated by the blade to open the close at least one circuit, and
- timing means for alternately moving the operating member from the first end of the guideway past the intermediate point and from the second end of the guideway past the intermediate point.
7 more elements
A timer switch comprising support means,
- a blade having one end pivoted on the support means with the other end of the blade movable between first and second positions,
- an elongated operating member pivoted at one end,
- said support means having a guideway receiving and guiding the other end of the elongated operating member between first and second positions,
- a spring connecting the free end of the blade to a point on the operating member spaced from its one end such as to bias the blade into its first position when the operating member is in its first position and to bias the blade into its second position when the operating member is in its second position,
- contact means operated by the blade to open and close at least one circuit,
- automatic timing means for alternately engaging and pushing the other end of the operating member between its first and second positions, and
- a manual control having first and second abutments and having first, second and third positions, said first abutment positioned to engage the other end of the operating member to prevent movement of the operating member to its first position when the manual control is in its first position, said second abutment positioned to engage the operating member to prevent movement of the other end of the operating member to its second position when the manual control is in its third position, and said first and second abutments allowing free movement of the operating member when the control is in its second position.
4 more elements
A timer switch comprising
- support means
- a blade having one end pivoted on the support means with the other end of the blade movable between first and second positions;
- an operating member movable between first and second positions;
- a spring connecting the free end of the blade to the operating member such as to bias the blade into its first position when the operating member is in its first position and to bias the blade into its second position when the operating member is in its second position;
- contact means operated by the blade to open and close at least one circuit;
- automatic timing means for alternately moving the operating member between its first and second positions;
- said timing means including a synchronous motor, a gear train operated by the synchronous motor, a clock dial rotated by the gear train, first and second selectors selectively positionable about the clock dial, first and second levers pivotally mounted on the support means and having first ends positioned to be engaged and pivoted through arcs by the respective first and second selectors, and means biasing the first and second levers into unpivoted positions, said first and second levers having respective means formed on the other ends thereof for engaging the operating member to move the operating member to its respective first and second positions;
- a manual control having first and second abutments and having first, second and third positions, said first abutment positioned to engage the operating member to prevent movement of the operating member to its first position when the manual control is in its first position, said second abutment positioned to engage the operating member to prevent movement of the operating member to its second position when the manual control is in its third position, and said first and second abutments allowing free movement of the operating member when the manual control is in its second position;
- said manual control including a slide plate, and a button extending from the slide plate, said first and second abutments also extending from the slide plate,
- said support means including means slidably supporting the slide plate;
- and
- said support means and said slide plate having cooperating detent and projection means to retain the slide plate in the respective first, second and third positions of the manual control.
9 more elements
A timer switch comprising
- a housing having a pair of prong receiving openings and a pair of outlet openings;
- a first integral conductive member having a prong extending through one of the pair of prong openings in the housing and having prong engaging means disposed adjacent one of the pair of outlet openings;
- a second integral member having a prong extending through the other of the pair of prong receiving openings in the housing;
- a first contact mounted on the second integral member;
- a third integral member including a pivot seat and prong engaging means disposed adjacent the other of the outlet openings;
- a contact blade pivotally mounted on the pivot seat of the third integral member;
- a second contact mounted on the contact blade;
- and
- timing means for pivoting the contact blade between first and second positions such that the first and second contacts are engaged in the first position and such that the first and second contacts are disengaged in the second position;
- said timing means including a synchronous motor, a gear train operated by the synchronous motor, a clock dial rotated by the gear train, first and second selectors selectively positionable about the clock dial, first and second levers pivotally mounted on the support means and having first ends positioned to be engaged and pivoted through respective arcs by the respective first and second selectors, means biasing the first and second levers into unpivoted positions, an operating member movable between first and second positions, and a spring connecting the free end of the blade to the operating member such as to bias the contact blade into its first position when the operating is in its first position and to bias the contact blade into its second position when the operating member is in its second position, and said first and second levers having respective means formed on the other ends thereof for engaging the operating member to move the operating member to its respective first and second positions.
7 more elements
A timer switch comprising
- a housing having a pair of prong receiving openings and a pair of outlet openings;
- a first integral conductive member having a prong extending through one of the pair of prong openings in the housing and having prong engaging means disposed adjacent one of the pair of outlet openings;
- a second integral member having a prong extending through the other of the pair of prong receiving openings in the housing;
- a first contact mounted on the second integral member;
- a third integral member including a pivot seat and prong engaging means disposed adjacent the other of the outlet openings;
- a contact blade pivotally mounted on the pivot seat of the third integral member;
- a second contact mounted on the contact blade;
- and
- timing means for pivoting the contact blade between first and second positions such that the first and second contacts are engaged in the first position and such that the first and second contacts are disengaged in the second position;
- said housing including front and back housing portions having respective projections for mounting the first, second and third integral members in the housing, and means securing the front and back housing portions together.
7 more elements
Dependencies are inferred from the claim text.