Congreve Rolling Marbles clock - - Silver plated brass - 2000-2010
05
days
17
hours
13
minutes
42
seconds
Starting bid
€ 1
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Silver plated brass and plexiglass Congreve rolling marbles table clock with a mechanical movement, 40 cm high, 30 cm wide, 27 cm deep, weighing 5 kg, produced in China in 2000–2010, in excellent condition with winding key, not striking, and a power reserve of several days.
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Description from the seller
Silver plated table clock with plate and ball. A very nice reproduction of the Congreve Roller Ball - made in China. Instead of a pendulum, the movement is made by a ball that moves back and forth along a plate, the "rolling ball". The ball moves 12 seconds forward and 12 seconds back. A superb clock and a real collector's item.Wooden base 30 cm x 27 cm. Total height 40 cm. The running ball clock was patented by Sir William Congreve in 1808. The basic concept is that the ball slides between 12 and 30 seconds to travel the zigzag track, which causes the escapement to move. This reverses the angle of the plate and the hands move forward accordingly. The mechanism is mounted on a wooden console with three adjustable spherical feet. Ideally, the ball should always have the same running time on the track, but this is not the case. Friction, dust, will prevent the ball from rolling and slow it down. In addition, the metal expands or contracts with changes in temperature, which changes the length of the path and the size of the ball. Adjusting the accuracy, which will be relative, is done by changing the angle of inclination of the plate. Therefore, the clock will never run exactly on time. The watch is accompanied by a winding key.
Silver plated table clock with plate and ball. A very nice reproduction of the Congreve Roller Ball - made in China. Instead of a pendulum, the movement is made by a ball that moves back and forth along a plate, the "rolling ball". The ball moves 12 seconds forward and 12 seconds back. A superb clock and a real collector's item.Wooden base 30 cm x 27 cm. Total height 40 cm. The running ball clock was patented by Sir William Congreve in 1808. The basic concept is that the ball slides between 12 and 30 seconds to travel the zigzag track, which causes the escapement to move. This reverses the angle of the plate and the hands move forward accordingly. The mechanism is mounted on a wooden console with three adjustable spherical feet. Ideally, the ball should always have the same running time on the track, but this is not the case. Friction, dust, will prevent the ball from rolling and slow it down. In addition, the metal expands or contracts with changes in temperature, which changes the length of the path and the size of the ball. Adjusting the accuracy, which will be relative, is done by changing the angle of inclination of the plate. Therefore, the clock will never run exactly on time. The watch is accompanied by a winding key.
Details
Brass type
Silver plated brass
Era
After 2000
Number of objects
1
Clock type
Congreve Rolling Marbles clock
Material
plexiglass, Brass
Clock mechanism
Mechanical
Power reserve
more day movement
Striking
Not striking
Country of origin
China
Condition
Excellent condition: barely used with minimal signs of wear
In working order
Yes
Height
40 cm
Width
30 cm
Depth
27 cm
Estimated period
2000-2010
Weight
5 kg
Winding key
Yes
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