Digital alarm clock

Claim 1

In a digitally indicating clock, the combination comprising a plurality of endless loops of tape arranged side by side carrying cycles of numerals respectively representative of minutes, tensof-minutes and hours in successive orders, means including a front panel having a viewing area for viewing said cycles of numerals, the tapes having respective drums for driving the same, geneva mechanisms interposed between the adjacent drums, a seconds drum having seconds indicia on the periphery thereof, a motor and first drive train for driving the seconds drum, a geneva mechanism interposed between the seconds drum and minutes drum for periodic stepped advancement of the latter, an hour wheel, an hour wheel drive train, an alarm set wheel adjacent the hour wheel, said hour wheel and said alarm set wheel having cooperating cams for producing relative endwise movement when the wheels come into a predetermined condition of register, said hour wheel drive train being coupled to the minutes drum for periodic advancement of the hour wheel, and means responsive to the relative endwise movement of the wheels for controlling the operation of apparatus from an ''''off'''' condition selectively and sequentially to conditions of ''''auto-on'''' and ''''alarm,'''' said means including a trip lever, said trip lever being pivotally mounted adjacent the wheels foR cooperable endwise movement with the wheels, means biasing said trip lever in one direction about said pivot point, means in the path of said trip lever for limiting biased pivotal movement of said trip lever in response to the relative endwise movement of the wheels, a circular rack on said trip lever, a second circular rack gear cooperable with said trip lever rack gear and rotatable through an angular displacement representative of pivotal movement of said trip lever, means interconnecting said second circular rack gear and controlled apparatus, and a function lever for selectively disabling movement of said trip lever.