Light switch cover plate with mechanical timer mechanism

Details Light switch cover plate with mechanical timer mechanism Light switch cover plate with mechanical timer mechanism

1997-03-26

1998-10-27

Friedhofer, Michael A.

Electricity: circuit makers and breakers

Retarded

Chain or flexible drive

200 38E, 307141, H01H 4300

Patent

active

058280189

ABSTRACT:
A light switch cover plate with a mechanical timer mechanism that includes a linear rack member for engaging the existing light switch actuator and that includes a cover plate member defining a timer mechanism cavity wherein the linear rack member is slidably installed within the timer mechanism cavity and guided along a predetermined path between a fully upward position and a fully downward position by an upper rack guide and a left and right lower rack guide, the linear rack member being biased toward the fully downward position by a helical spring attached between the linear rack member and the cover plate member, the linear rack having gear teeth formed along a side edge thereof in meshing relationship with a spring loaded mechanical drive mechanism including a spring drive assembly, a spring drive gear, a reduction gear assembly and an anchor escapement gear, the spring loaded mechanical drive mechanism providing a resistance against movement of the linear rack toward the fully downward position under the tensional force of the helical spring in a manner such that a predetermined period of time is required for the linear rack to move from the fully upward position to the fully downward position.

REFERENCES:
patent: 3979601 (1976-09-01), Franklin
patent: 4002925 (1977-01-01), Monahan
patent: 4112313 (1978-09-01), Kutin
patent: 4164635 (1979-08-01), Finch et al.
patent: 4494012 (1985-01-01), Coker
patent: 4508943 (1985-04-01), Pfeiffer et al.
patent: 4794213 (1988-12-01), Wood
patent: 4835413 (1989-05-01), Nilssen
patent: 4912376 (1990-03-01), Strick
patent: 5306957 (1994-04-01), Ellingham et al.
patent: 5473204 (1995-12-01), Temple

Affiliated with

Also associated with

Rating

Light switch cover plate with mechanical timer mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light switch cover plate with mechanical timer mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light switch cover plate with mechanical timer mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1614855