Ellenberger & Poensgen Gmbh

Wilo Gmbh

Fritz Krasser

Josef Peter

Oswald Onderka

Peter Meckler

Wolfgang Schmidt

Gerhard Endner

Konrad Heydner

William F Sell

Horst Ellenberger

Rainer Volkl

Erhard Pietsch

Hansjuergen Kech

Stephan Greitzke

Frank Tolksdorf

Franz Winkler

Ulrich Reichert

Josef Kinner

An overcurrent circuit breaker arranged inside an approximately cube-shaped, two-part insulating housing, having a chassis section and a locking section. Located between the parallel side walls of the housing sections is a switchgear with a contact bridge, the movement of which is guided parallel to the side walls and which extends in essentially longitudinal direction at a right angle to the side walls and while in the on position between two fixed contacts that are fastened inside the housing and are positioned on both sides of the movement plane for the switchgear. The fixed contacts are flat pieces akin to a knife blade and fit against the side walls and, respectively, form a contact point with their narrow, knifeblade type edges facing the contact bridge. With their rear sides opposite the contact points, the fixed contacts fit against a flank wall of housing. As a result of this, the fixed contacts are positioned in an especially space-saving manner in the corners of housing.

Overcurrent circuit breaker

Protective device for an electrical consumer

An electrical instrument switch includes a rocker switch for manual on-and-off switching and that is seated in an insulation housing. Depending on the pivot position, the rocker switch moves, with a working end that dips into the housing interior, a contact bridge between the closed position of its contact and the open position of its contact. The contact bridge is electrically connected in series with a contact spring that can be triggered thermally and hence acts as an overcurrent protection. The contact spring can move between its contact position and its open position. The contact spring is mechanically prestressed in the direction of its open position. When overcurrent occurs, it is transferred out of its contact position into its open position by a thermal triggering element. A pivot of the rocker switch counter to the mechanical prestress, in the tipping direction of the contact spring, guides the contact spring from its open position back into its contact position.

Instrument switch having integrated overcurrent protection

A single- or multi-pole circuit breaker has a housing that includes a housing shell and a closure shell attached thereto to form a hollow chamber. The closure shell and the housing shell each having an inside wall surface extending parallel to a shell plane. The circuit breaker includes n-1, where n is an integer greater than 1, intermediate housing shells inserted between the housing shell and the closure shell, and having first and second wall surfaces corresponding to the housing shell wall surface and the closure shell wall surface, respectively. The first wall surface faces the closure shell wall surface, and the second wall surface faces the housing shell wall surface to form n hollow pole chambers. A switching mechanism for tripping the circuit breaker includes a switch lever located within each pole chamber. The switch lever has at least one of a trip lever and a latching lever. Each switch lever is attached to a respective wall surface and is axially seated to pivot in a plane of movement extending approximately parallel to the shell plane. At least one one-piece coupling rod penetrating each switch lever and each intermediate housing shell in a direction perpendicular to the shell plane is provided for coupling each switch lever together for common triggering of all poles.

Single or multipole circuit breaker

A bimetal controlled circuit breaker includes a current bus that is electrically connected in series with the bimetal element. The current bus extends parallel to the bimetal element in the deflection plane of the latter and is rigid relative to the bimetal element. The deflection of the bimetal element is supported by the action of electrodynamic forces. In order for the circuit breaker to be suitable for greater current intensities and the effect of the electrodynamic forces to be better utilized, the bimetal element is electrically connected in parallel with a shunt path.

Bimetal controlled circuit breaker

A circuit breaker which is remote controllable by an external remote control switch by way of an electronic control unit and an electromagnetic switch drive controlled by the electronic control unit. The switch drive switches the electric circuit by a switch lock, which is latched to it and which, during an overload, is unlatched and opened by way of the release of the bimetal of switch drive and, as a result, interrupts the electric circuit. During bimetal release, an auxiliary switch is actuated, which by way of the electronic control unit turns the remote control switch off and re-latches switch drive with the opened switch lock.

Remote controlled overload protective switch

Circuit breaker

A push button operated circuit breaker with thermal tripping by way of a bimetal strip includes an angled contact bridge which is mounted within a switch housing to be freely pivotal and is urged in a tripping direction by a tripping spring against a contact lug of the bimetal strip projecting laterally for engagement with a contact piece of the contact bridge. The circuit breaker further including a connecting arm which is coupled for movement with the bimetal strip. The cylindrical exterior surface of a drum-shaped rotary body lies against the connecting arm and thus creates a kinematic connection between the rotary body and the connecting arm. When the switch housing is fully assembled, the drum-shaped rotary body is operative as an adjustment eccentric which is externally manipulatable by way of a hexagonal recess so as to adjust the tripping characteristic of the circuit breaker.

Thermally tripped circuit breaker with adjustable tripping sensitivity

Overload switch

A safety door lock for a door of an electrical appliance includes a longitudinally displaceable detent bolt mounted in a door of an appliance, a door lock housing having an opening receiving the free end of the detent bolt, and a longitudinally displaceable switching slide that having a stub end adapted to engage with the free end of the detent bolt. After engagement, further longitudinal displacement of the detent bolt causes movement of the switching slide to its 'on' position. A biasing mechanism urges the switching slide toward an 'off' position in which a detent mechanism latches the detent bolt in a locking position upon insertion of the detent bolt in the door lock housing. The detent mechanism includes a releasable locking latch which clamps the switching slide in the 'on' position. The locking latch has a first portion which, in the 'on' position of the switching slide, engages the detent bolt to retain the detent bolt within the door lock housing, and has a second portion which, in the 'off' position of the switching slide, engages the switching slide to retain the switching slide against longitudinal movement toward the 'on' position.

Safety lock for the doors of electrical applicances

An overload protection switch having a push button for manually initiating actuation of the overload protection switch and a movable contact member forming a switching path and having at least one fixed contact. There is a lockable trip mechanism actuated by the push button for controlling the movable contact member during actuation of the overload protection switch and a bimetal element which includes a locking lever pivotal into a locking position and pivotal into its unlocking position. A trip slide is articulated to the movable contact member and is charged in a turn-off direction. The trip slide is additionally supported in its path of movement by a housing groove at a counterslope fixed to the housing. An essentially wedge-shaped inner angle is formed to reduce friction forces at the locking lever and produce a lower tripping force at the bimetal element.

Overload protection switch

A push button actuated overload protection switch includes a bimetal member which holds a contact bridge in a latched ON position. The contact bridge is configured as an approximately rectangular angle lever and is mounted on a switch rod so as to be freely pivotal and displaceable in the axial direction. The contact bridge is under the pressure of a switch spring which is supported at the switch rod. During turn-off the contact bridge is released by the bimetal member and pressed against an oblique abutment at the housing and pivoted into an oblique engagement position, whereby a projection on the switch rod engages the contact bridge. Subsequent actuation of the push button causes the contact bridge to be transferred into its ON position in which the pressure of the switch spring presses it into engagement behind a contact piece of the bimetal member and into contact with a contact terminal. The push button is provided with a deflection lug which extends alongside the switch rod and deflects the bimetal member when the push button is depressed so that it releases the turn-off movement. This makes it possible to manually turn off the switch by pressure actuation.

Overload protection switch with single push button for turn-on and

A push button-actuated overload protective circuit breaker with bimetal cutout comprises a housing between the sidewalls of which two contact segments are held in position, and a push button and a pressure spring associated therewith are guided for longitudinal displacement therebetween. The ends of the contact elements which protrude from the housing are devised as plug-in prongs arranged in parallel with each other. In order to provide a circuit breaker of such small size that it can be plugged into a flat-shape fuse female plug socket, the contact elements are provided in a middle zone thereof, each with a step-like bend the height of which corresponds to about half the height of the interior space in the housing. The bent contact ends then come to rest against the opposite internal surfaces of the housing sidewalls. At one of the contact ends of a first contact element there is fastened a bimetal snap spring with one side thereof and extends transverse to the direction in which the contact elements extend. This bimetal snap spring has a slewable end which overlaps the second contact element and is biassed into contact with the latter when in rest position. The push button is provided at its inner end with a separating wall which is adapted for sliding between the slewable end of the bimetal spring and the contact end of the second contact element when the circuit breaker is released.

Growing community of inventors

Altdorf, Germany

Fritz Krasser