Bi-directional limit switch
AssigneePotter Electric Signal Company, LLC
InventorRobert K. Baker
Life of this patent
Estimating the term…
Abstract
An electrical switch of the type actuated by depressing a spring-loaded plunger functions as a bi-directional limit switch. It utilizes a lever mechanism having two fulcrum points on opposite sides of the plunger. Deflection of the switch lever arm in either direction depresses the switch plunger.
Claims8
In an electrical switch of the type actuated by a spring-loaded plunger extending outwardly along a reciprocating axis to an operating end,
- the improvement comprising
- two fulcrum means on opposite sides of the plunger, aligned parallel to each other and spaced from and transverse to the said axis of the plunger, and
- lever means, including an outstanding actuating arm portion, mounted operably on said fulcrum means and normally held by the spring-loaded plunger in an undeflected position,
- said fulcrum means and lever means together having means to actuate the plunger upon linear deflection of the said actuating arm portion in either of two opposite directions.
In an electrical switch of the type actuated by a spring-loaded plunger extending outwardly along a reciprocating axis to an operating end,
- the improvement comprising
- a single lever arm having an outstanding actuating arm portion and having a fulcrumed portion extending on opposite sides of and abutting the plunger,
- said lever arm being normally held by the spring-loaded plunger in an undeflected position, and being normally positioned substantially perpendicular to the reciprocating axis of the plunger,
- said lever arm being mounted on two fulcrum means each having a fulcrum point on opposite sides of the plunger, aligned parallel to each other and spaced from and transverse to the axis of the plunger, and
- means for permitting said lever arm to move from each of said fulcrum points when said lever arm is pivoted about the other.
A lever mechanism adapted for use with an electrical switch of the type actuated by a spring-loaded plunger extending outwardly along a reciprocating axis to an operating end, comprising
- a lever arm having an outstanding actuating portion and a fulcrumed portion extending on opposite sides of and abutting such switch plunger and normally positioned substantially perpendicular to the said axis of such plunger,
- two parallel fulcrums therefor, one located on each side of the plunger, against which the lever arm is normally held by the spring load of such plunger,
- said fulcrums having means for permitting said fulcrumed portion to move from either of said fulcrums when said lever arm is pivoted about the other said fulcrum,
- whereby deflection of said actuating portion in either direction will actuate the plunger.
Dependencies are inferred from the claim text.