Abstract: The rotation of a rotary switch is limited by stop ribs in a knob that facilitates the rotation of the rotary switch. The stop ribs can be configured to limit the rotational stress that is applied to the rotary switch, or to limit the states of the switch that are realizable by a particular knob. Using keyed detachable knobs, different keys can be configured to provide different ranges of rotation of the rotary switch, thereby enabling different switching authorizations, based on the particular knob that is used.
Type:
Grant
Filed:
March 9, 2001
Date of Patent:
August 26, 2003
Assignee:
Saia-Burgess Gateshead Ltd. Dukesway, Team Valley, Trading
Estate