Abstract: A safety switch built-in with protecting circuit is provided. The safety switch includes a housing having a button shade pivotally mounted thereof. Three pairs of conductive plates is provided and one of the conductive plates is provided with a first platinum conductive boss. The other conductive plate is provided with a alloy plate having a second platinum conductive boss corresponding to the first conductive boss. A push and pull rod having one end being movably passed through an opening and the other end is pivotally connected with the button shade. Characterized in that wherein the alloy plate is made from assembling instead of pressing process. The curvature is formed such that the alloy plate is provided with bi-directional breaking functions. Furthermore, the internal stress structure will not be damaged during the assembling process. Besides, the yield and accuracy of mitering an overload current can be readily attained via the formula of V=IR and W=VA.

Abstract: An improved safety switch with overload protection circuit includes a housing having a lamp cover and three connecting plates disposed in a receptacle. One connecting plate is provided with a bi-metal plate having a platinum contact, and one is provided with a platinum contact corresponding to the bi-metal plate. When power is overload, the bi-metal plate will trip off so that an electrically insulating baffling plate may slip in between the platinum contacts to cut off power supply. The lamp cover is provided with a control hook which may control the bi-metal plate. The lamp cover further has a leg extending into an elongated notch of the baffling plate. By pressing the lamp cover, displacement of the bi-metal plate and the baffling plate may be controlled to achieve electrical connection or disconnection.

Abstract: An improved device for protecting an electrical load from a current overload combines an electrical switch and a re-settable circuit breaker in a single housing. The device avoids the use of gate plates, visually alerts an operator to the existence of a tripped conditions, and provides automatically self-aligning, evenly-wearing contacts for the switch.

Abstract: A rocking beam is movable into an "on" and an "off" position by actuating means which actuate linkage means and work against the force of a spring urging the beam into an intermediate trip-position. Through a guide surface the beam actuates a toggle assembly composed of two toggle levers linked by a toggle joint and having distal joints linked with a contact actuating lever and a pawl lever, respectively. When the pawl lever is restrained by the ratchet, the movement of the toggle joint caused by moving the actuating means into the "on" or "off" position results only in the opening and closing of contacts through a movement of their actuating lever. A readiness for switching on can be obtained by resetting the actuating means from the trip-position into the "off" position.

Abstract: A control device for operating the displacement of an arm between an on-position and an off-position, comprising a control member operating through a transmission element consisting of a link and a locking means movable between a locked position and an unlocked position, the device being usable as an electric switch.

Abstract: A circuit interrupter characterized by a manually operated fast acting switch and an overload relay for tripping of switch in response to current overload. The switch comprises means for moving electric contacts between open and closed and tripped positions which means includes a releasable arm which is movable between latched and unlatched positions. The switch also comprises a pair of pushbuttons for manually opening and closing the switch which pushbuttons are effective to move a lever which in turn actuates an overcenter toggle mechanism for opening and closing the switch.

Abstract: Electric circuit breaker alternately providing overcurrent and/or over temperature protection by means of temperature responsive bimetal elements, whereby an increase in pressure as between electrical contacts is effected as the temperature may be increased up to the point of break, resulting in improved contact life and more effective contact when the device is subjected to external vibration.

Abstract: A distribution transformer having a secondary circuit breaker utilizing a movable bridging contact between two stationary contacts for completing a series circuit therethrough. The movable bridging contact is spring biased towards an open position separated from the stationary contacts, but with the circuit breaker in the normally closed position is held in engagement with the stationary contacts by a latching mechanism which is responsive to a bimetal or magnetic trip element to allow the circuit breaker to trip open during overload conditions. The conducting bridging contact completes a series circuit through the circuit breaker which opens during circuit interruption. The secondary circuit breaker can also, if desired, be provided with a signal-light circuit which activates a signal light, on the exterior housing of the transformer, when current through the circuit breaker exceeds a low signal overload value which is less than the trip value.

Abstract: Primary control means for furnaces and the like including burner control means, means including solid state means effective to control said burner control means in response to a flame detector signal, bimetallic safety switch means, and means for interfacing between an isolated low voltage control circuit and said burner control means.