1 Hour Sprocket Clock

How accurate does a clock need to be? Most household clocks display time with 3 mechanical movements; the hour, on a 12 hour cycle; minutes past the hour; and seconds past the minute. How crucial is it for us to know how many seconds are past the minute? Do we need to know the exact number of minutes past the hour?


One Hour Sprocket is a wall-mounted 12 hour clock with a 60 tooth sprocket attached to a motor, completing one revolution every hour. From the sprocket hangs a chain that consists of 720 links. Each link accounts for every minute of a 12 hour cycle. Among the black chain links is one polished stainless steel link to identify the position of the hour past 12 o’clock. To tell time one can estimate the position of the “hour hand” or count the number of links from the polished link to the top of the clock for a more accurate reading.

Between two 1/4” steel plates, sits a stepper motor, which ticks every 18 seconds. The hanging chain jiggles with each tick reassuring the clock’s functionality.

1 Hour Sprocket Clock is for sale as an edition of 20

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