Table clock - - Silver plated brass - 2000-2010
07
days
17
hours
15
minutes
03
seconds
Current bid
€ 250
Reserve price not met
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Selected by Justus Heutink
Holds broad knowledge of religious icons with six years of collecting experience.
Estimate € 1,400 - € 1,600
 | €250 | |
|---|---|---|
| €150 | |
| €50 | |
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Table clock from 2000–2010 with a mechanical rolling-ball Congreve-inspired movement, silver-plated brass case with a plastic element, a wooden base, and a winding key; 40 cm high, 30 cm wide, 27 cm deep, weighing 6 kg.
AI-assisted summary
Description from the seller
Silver-plated skeleton watch with "snek uurwerk" mechanism.
Hour, minute hands, seconds indication when the ball passes over the plate.
A very nice reproduction of the Congreve Roller Ball - made in China.
Instead of a pendulum, the movement is done by a ball that moves back and forth over a silver-plated dial - "rolling ball".
The ball moves 12 seconds forward and 12 seconds back.
A gorgeous watch and a real conversation piece.
The operation is on YouTube:
https://www.youtube.com/watch?v=kcbb-eA5vYI&t=21s
Wooden base 30 cm x 27 cm.
Total height 40 cm.
The Rolling Ball Clock was patented by Sir William Congreve in 1808.
The basic concept is that the ball takes 12 to 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.
It has been checked by a watchmaker and works well,
Ideally, the ball should always have the same rolling 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 comes with a winding key.
Silver-plated skeleton watch with "snek uurwerk" mechanism.
Hour, minute hands, seconds indication when the ball passes over the plate.
A very nice reproduction of the Congreve Roller Ball - made in China.
Instead of a pendulum, the movement is done by a ball that moves back and forth over a silver-plated dial - "rolling ball".
The ball moves 12 seconds forward and 12 seconds back.
A gorgeous watch and a real conversation piece.
The operation is on YouTube:
https://www.youtube.com/watch?v=kcbb-eA5vYI&t=21s
Wooden base 30 cm x 27 cm.
Total height 40 cm.
The Rolling Ball Clock was patented by Sir William Congreve in 1808.
The basic concept is that the ball takes 12 to 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.
It has been checked by a watchmaker and works well,
Ideally, the ball should always have the same rolling 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 comes with a winding key.
Details
Brass type
Silver plated brass
Era
After 2000
Number of objects
1
Clock type
Table clock
Material
Brass, Plastic
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
6 kg
Winding key
Yes
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