Automatic timer switch

Claim 1

In a timer switch having a frame plate, an electric motor carried by said frame plate, a time-of-day indicating means coupled to said motor, and a mechanically-actuated electrical switching means carried by said frame plate for switching electrical current including a plurality of electrical contacts, the improvement comprising: a. a manually-settable, rotatable start-time means for activating said electrical switching means; b. a manually-settable, rotatable stop-time means for activating said electrical switching means including: i. a stop shaft axially displaceable and rotatable in said frame plate. ii. a stop gear carried about said stop shaft having a first engagement means, iii. a stop hub carried by said stop shaft having a second engagement means engaging said first engagement means; and iv. linkage means mechanically linking said switch means to said stop hub including: an annular groove disposed in said stop hub; a yoke member having a first aperture and two side-by-side prongs, said prongs carried in said annular groove of said stop hub; a link member having second and third apertures, each disposed near a distal end of said link member; a first linkage pin located in said first aperture in said yoke member and said second aperture in said link member, thereby forming a pivotal joint; and a second linkage pin passing through said third aperture in said link member and an aperture in said mechanical-actuated electrical switching means, thereby forming a pivotal joint; whereby, axial movement of said stop hub is transmitted by said yoke member through said link member to said mechanically actuated electrical switching means thereby actuating said switching means.