Time switches

Claim 2

Apparatus for selecting a time for operation of a time switch comprising a disc shaped dial adapted to be rotated by timing means, an annular flange at the periphery of said dial, said flange having a series of recesses therein corresponding to selectable time intervals, at least one tappet carried at the periphery of said dial and selectably rotatable thereabout, engagement means on said tappet for selectively engaging a recess on the periphery of said flange, a rib on said tappet spaced radially inwardly of the periphery of said dial, means associated with said dial and engageable with said rib for restricting radial movement of the tappet between first and second radial positions on tHe dial and permitting substantially free movement of the tappet around the dial when the tappet is in one of its two restricted radial positions.

Claim 3

The apparatus claimed in claim 1 wherein the last claimed means includes a second flange on the periphery of said dial spaced from said first flange in a direciton normal to a radius of the dial, said last claimed means further including a pair of radially spaced annular grooves on one face of said second flange, an arm on said tappet extending radially inwardly over one surface of said second flange, projection means on said arm selectively engageable with said annular grooves for establishing selectable radial positions for said tapped on said dial.

Claim 4

The apparatus claimed in claim 2 and wherein said last claimed means further includes a second arm on said tappet extending radially inwardly over the opposite surface of said second flange, a rib on said second arm, an annular recess in said opposite face of said second flange for receiving said rib, said two arms with their respective projection means and ribs and said annular grooves and annular recess being constructed and arranged to retain said tappet on the periphery of the dial and permitting movement of the tappet about the dial when the projection means is in engagement with the annular groove of greater radius.

Claim 5

The apparatus claimed in claim 3 wherein said annular recess and said rib are constructed and arranged to permit radial movement of said tappet on said dial between said first and second radial positions.

Claim 6

Apparatus for selecting a time for operation of a time switch comprising a disc shaped dial adapted to be rotated by timing means, first and second spaced annular flanges disposed at the periphery of said dial, said flanges being spaced in a direction normal to a radius of said dial, said flanges being spaced in a direction normal to a radius of said dial, one of said flanges having a series of recesses therein corresponding to selectable time intervals, the other of said flanges having on one face thereof two radially spaced annular grooves and on the other face thereof an annular recess, at least one tappet carried at the periphery of said dial and selectably rotatable thereabout, said tappet including first and second arms that extend radially inwardly over, respectively, said one and other faces of said second flange, the first arm of the tappet being flexible and having a projection for selective engagement with the annular grooves on the one face of said other flange, the second arm of the tappet having a rib for engagement in the recess on the other face of said other flange, said rib and recess being proportioned to permit radial movement of the tappet to permit the projection on the first arm to selectively engage said two annular grooves, engagement means on said tappet for selectively engaging a recess on the periphery of said one flange when said projection on the first arm is in engagement with the innermost one of the annular grooves on said one face of the other flange, and switch operating means on said tappet for producing a switch operation when said tappet is at a predetermined position.

Claim 7

Apparatus for selecting a time for operation of a time switch comprising a disc shaped dial adapted to be rotated by timing means, first and second spaced annular flanges disposed at the periphery of said dial, said flanges being spaced in a direction normal to a radius of said dial, said flanges being spaced in a direction normal to a radius of said dial, one of said flanges having a series of recesses therein corresponding to selectable time intervals, the other of said flanges having on one face thereof two radially spaced annular grooves and on the other face thereof an annular recess, at least one tappet carried at the periphery of said dial and selectably rotatable thereabout, said tappet including first and second arms that extend radially inwardly over, respectively, said one and other faces of said second flange, the first arm of the tappet being flexible and having a projection for selective engagement with the annular grooves on the one face of said other flange, the second arm of the tappet having a rib for engagement in the recess on the other face of said other flange, said rib and recess being proportioned to permit radial movement of the tappet to permit the projection on the first arm to selectively engage said two annular grooves, engagement means on said tappet for selectively engaging a recess on the periphery of said one flange when said projection on the first arm is in engagement with the innermost one of the annular grooves on said one face of the other flange, and switch operating means on said tappet for producing a switch operation when said tappet is at a predetermined position.