Position signalling device
AssigneeMaschinenfabrik Reinhausen GmbH
InventorsDieter Dohnal, Josef Neumeyer
Life of this patent
Estimating the term…
Abstract
The invention relate to a position signaling layout for a motor drive which also serves to activate an on-load tap changer, an off-circuit tap changer or a plunger core coil. Position signaling devices of this kind detect the position at a given time of the on-load tap changer or similar and transmit this information in the form of an electric signal. According to the invention, the device consists essentially of a board on which there are fixed signaling contacts and a pivoted cam disc which connects said fixed contacts electrically and links them to a terminal lead via a spring operated switch, activating the spring operated switch by means of its front cam contour.
Claims10
In combination with a tap changer or movable-core coil having a motor drive with a shaft rotatable about and extending along an axis, a position-signaling apparatus comprising:
- a support plate;
- an annular array of separate signaling contacts on the plate centered on the axis;
- a cam disk juxtaposed with the plate, rotationally fixed with the shaft, and having an edge formed with a plurality of bumps;
- a contact arm mounted on the cam disk, independently of the shaft and engageable with the signaling contacts, whereby as the cam disk is rotated by the shaft the contact arm contacts succeeding signaling contacts;
- a switch mounted adjacent the cam edge and connected to the contact arm;
- and
- cam-follower means on the switch engaging the bumps of the cam edge for opening and closing the switch synchronously as the contact arm moves between signaling contacts.
Dependencies are inferred from the claim text.