Contact assembly for low-voltage circuit breakers with a two-arm contact lever
AssigneeSiemens Aktiengesellschaft
InventorsBernhard Preuss, Karl-Heinz Manthe
Life of this patent
Estimating the term…
Abstract
A contact assembly is provided for current-limiting low-voltage circuit breakers. The contact assembly has a two-armed contact lever swivel-mounted on a central bearing pin whose lever arms are equipped at their ends with contact pieces. The contact lever is equipped with a slot for mounting on the bearing pin whose longitudinal axis extends approximately at a right angle to the longitudinal axis of contact lever. The contact lever has a stop extending at approximately a right angle to its longitudinal axis for a catch swivel-mounted on the bearing pin. The contact forces on both lever arms cannot be influenced by the swivel mount or by the drive mechanism of the contact lever, but are determined exclusively by the biasing springs.
Claims6
A contact assembly for a low-voltage circuit breaker having a two-armed contact lever and being equipped with a contact piece at each end on opposite facing sides of a longitudinal axis and each lever arm being assigned a biasing spring, comprising:
- a swivel mount for the contact lever having a fixed bearing pin for providing an axis of rotation and a slot in the contact arm enclosing the bearing pin, the longitudinal axis of the slot extending approximately at a right angle to the longitudinal axis of the contact lever, and
- said contact lever having at least one stop surface extending approximately at a right angle to the longitudinal axis of the contact lever and being matable with a catch, the catch being an integral component of a switching shaft which is swivel-mounted on the bearing pin for moving the contact lever in the switch-off direction.
Dependencies are inferred from the claim text.