In the congreve rolling ball clock the passage of time is indeed counted by a ball bearing running along a predefined path.
Marble ball alarm clock.
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Each ball takes 15 seconds to travel the length of a zigzag track.
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Once it reaches the end of this path it trips an escapement and actually moves the clock s hands forward to the next position.
Ending oct 4 at 5 08pm pdt 1d 21h.
Time machine rolling marble ball kinetic display clock.
A fantastic alternative to standard timers.
The original rolling ball clock.
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Vintage florn globe alarm clock ornate cherub gold tone case 4 x 4 travel clock.
Spice up the dècor in any room of your home with decorative clocks.
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Time machine rolling marble ball kinetic display clock.
Other modern clocks 1970 now.
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Try more sensory timers.
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Ending oct 4 at 5 08pm pdt 19h 9m.
Set a time and watch the marbles follow the course along until they have all gone.
Shop for clocks in decor.
This fun filled marble run timer is a fantastic visual aid that can be used at home and in classrooms.
You can once again purchase new clocks from the original owner and inventor of this timepiece.
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