Table regulator - Precision portal clock

Dimensions: H x W x D: 49 x 28 x 15 cm

Description:
Large precision portal clock from the 1820s.
The round arch in which the clockwork is mounted is supported by solid columns. The neatly laid mahogany veneer contrasts beautifully with the finely crafted and fire-gilt bronze parts.

The movement is a French pendulum movement with scissor escapement, locking disc striking mechanism and compensation pendulum with blade suspension. It comes from the Tarault Jeune workshop, which, according to Brian Loomes - Watchmakers and Clockmakers of the World, is documented from 1807-1826 in the Rue St. Denis in Paris.
The power reserve is 21 days.

The white enamelled dial ring with black minute track, half-second division and Roman hour numerals is framed by a broad bezel decorated with palmettes. The central area of the dial is finely guilloché and fire-gilt. The engraved signature can also be found here: Tarault Jeune á Paris.
The time is indicated by blued steel hands - Breguet hands for the hours and minutes and a simple straight hand with a crescent-shaped counterweight for the seconds.

Interesting facts:
The compensation pendulum, here designed as a rust pendulum, compensates for rate inaccuracies caused by temperature fluctuations.
The nine rods of the pendulum rod are made alternately of brass and steel. The clever arrangement of the rods, which move in opposite directions when the temperature fluctuates, means that the pendulum bob always remains at the same height regardless of the temperature. As the pendulum is always the same length, the running speed remains largely stable.

Thanks to its extremely small contact surface, the blade suspension enables an almost frictionless oscillating movement. The pendulum's centre of rotation, which is precisely defined on the cutting edge, allows the most accurate calculations to be made for gear correction. One of the photos shows the upper end of the pendulum without the back cover. The minimal contact surface in the blade suspension can be clearly seen in this photo.

The pendulum guide can be adjusted by means of a knurled screw to compensate for even the slightest misalignment at the place where the clock is set up.

Condition:
The movement has been dismantled and cleaned from top to bottom. It runs reliably and accurately. The case and the bronzes have also been cleaned and are in beautiful and authentic condition.

Price: 7500,-€

Table regulators by Tarault Jeune were sold at Sotheby's New York in October 2018 and at Christies New York in January 1970 and October 1996.