20 секунд прямоугольный конгрив Роллинг шарового полированное антикварное латунь настольные часы с деревянным основанием и стеклянная крышка JG9002 1 (1301700717)

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Product Overview

Description


  Cast Copper 30 seconds Rectangular Congreve's Rolling Ball    Antique Table Clock with Wooden Base & Glass Cover


 


 


Specification


 


 



































Dome Glass:

No chips and cracked


Tape:

Table Clock


Case Condition:

Very Good


Dial Numerals:

Roman & Abrabic


Setting Type:

Lever


Dials Condition:

Excellent


Weight:

14kg


Movement Running:

Yes


Dimension:

350×310×430mm


Instruction Book:

Yes



 


 


 


Intrudtion of Congeve's Rolling Ball Clock


 


 


    A Congreve clock (also known as Congreve's Rolling Ball Clock or Oscillating Path Rolling Ball Clock) is a type ofclock that uses a ball rolling along a zig-zag track rather than a pendulum to regulate the time. It was invented by Sir William Congreve in 1808. The ball takes between 15 seconds and one minute to run down the zig-zag track, where it trips theescapement which in turn reverses the tilt of the tray and at the same time causes the hands of the clock to move forward. Thus the angle of the plate reverses and the clock hands move forward between one and four times every minute. On versions of the clock with a dial to indicate seconds, the second hand jumps forward either 15 or 30 seconds on each oscillation depending on the length of the track.


    Congreve appears to have been unaware that rolling ball clocks had been invented earlier by both Nicolas Grollier de Servièreand Johann Sayller. Congreve's version differed from Grollier's rolling ball clock in that the ball travelled down a zig-zag rather than straight path. While Sayller's version had also used a zig-zag path, it had utilized a number of balls and a fixed table rather than the single ball and tilting table employed by Congreve. The "Extreme Detached Escapement" (as Congreve referred to his escapement design) was patented in 1808. Congreve, who was not a clock maker, hired Gravel and Tolkien to produce the first working version, which he then presented to thePrince of Wales in 1808. This version was weight-driven, but the second design, which appears to have been constructed by John Moxon, was spring-driven. The second model is in the collection of Buckingham Palace.


Congreve clocks are unreliable timekeepers — the time taken for the ball to travel along the track varies greatly depending on the cleanliness of the track and ball, and since the plate is aligned horizontally it is easy for dust to accumulate.


 


Picture  Gallary


 24K gilted clock.jpgantique clock.jpgJG9002-1.jpg



FAQ


1- Price

Please contact with us for the price confirmation.The price is just for reference not correct one sometimes.  Because the material cost is changable, the price has to be inquired at any time.

2- MOQ:

You can order 1 pcs at least. But more quanttiy, more discount.

3- Freight cost

Please send me your detailed address for the freight cost check. 

4-Shipping

Usually we ship the goods in batch by sea. But only one pcs, we'd better to ship by Express or Air.

5- Package

We will pack the goods by wooden box, carton. It is strong enough as shipping.

6- damage

Because the glass is fragilable we do not guratee the glass safe. You can buy the glass in your local place. 



 


1301700717
0.0097 s.