Derek Roberts Antiques.
FINE ANTIQUE CLOCKS.
Established 1968.
Tel.(01732)358986. Fax.(01732)771842.

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31673C.R
ARNOLD & DENT, LONDON, NO. 402.
A GOOD MAHOGANY EIGHT DAY LONGCASE REGULATOR OF THE FINEST QUALITY WITH DENT’S IRON JAR PENDULUM. CIRCA 1840.

The elegant mahogany case has a flat top to the hood with canted corners and raised cock bead panels. The trunk has a fully glazed door and canted front edge. The base has an applied moulding with a single plinth and small block feet. The best flame mahogany veneer is used throughout including the backboard, which has an engraved and silvered beat plaque.

The silvered brass round 11" engraved dial has typical observatory layout with Arabic numerals. It is signed 'Arnold & Dent, 84 Strand, London, No. 402’ and has slender blued steel hands. At some time in the past part of the motion work was changed and a small 12 hour chapter ring was applied to the dial covering the 24 hour ring. We have removed and retained this later chapter ring and restored the motion work to its original configuration.

The substantial eight day movement has a number of exceptional detailings. Each of the pillar washers are numbered to coincide with the number stamped by each pillar on the frontplate. The finely cut and polished pinions are located on their arbors via tapers which is most unusual. It has five well turned tapered pillars and the large arched plates are signed ‘Arnold & Dent 402.’ It has deadbeat escapement with jewelled pallets and Harrison’s maintaining power. The wheel work is incredibly fine and has six crossings with high count pinions. It has a long steel crutch with beat adjustment and an improved mercury compensated pendulum to Dent’s own design. The cast iron jar has an engraved and calibrated top and a tapered pointer to the base.

The brass covered weight falls slightly to one side through the veneered base board and has a fine pulley with six crossings.

This is one of the nicest regulators we have had for many years.

Height: 6' 2¾" (190 cm.)

Price band: F click here.


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John Roger Arnold was born in 1769 at St James’s Street, London. He was the son of John Arnold who was possibly the greatest watch and clockmaker of his time, much known for his precision timepieces.

At the age of 14 John Roger Arnold started a seven year apprenticeship with his father and in 1792 worked with Breguet for a year in Paris. John Roger Arnold was in partnership with his father and in 1796 gained his Freedom of the Clockmakers’ Company. This was the same year Arnold senior retired. John Roger Arnold was Master of the Clockmakers’ Company in 1817 and in 1830 he moved to 84 Strand, London. John Roger Arnold had an adopted son who helped with the business, but he sadly died aged 34 in 1829. At this point Arnold was age 60 and to ease his burden of running the business he went into partnership the following year with Edward John Dent.

Dent was not only a fine craftsman, but also had a keen business sense. Edward John Dent was born in 1790 and was apprenticed to his grandfather. By 1814 he was becoming well known and was employed between 1815-1829 by a number of well known firms including Vulliamy, Barraud and McCabe. He was admitted to the Clockmakers’ Company in 1830 and was given the Freedom of the City of London in 1831.

The partnership produced a number of fine clocks and they made substantial efforts to increase their share of the chronometer market. By the mid 1830s Arnold & Dent had established an excellent relationship with the Royal Observatory and in particular the astronomer Sir George Biddle Airy. In 1836 Dent took out a Patent for a balance spring and it is about this time they started to use cast iron jars for their mercury compensated pendulums.

In 1838 Dent proposed his improvement to the mercury pendulum to an assembly of the British Association for the Advancement of Science. His argument was that the cast iron jar made for a more effective transference allowing the mercury to react more quickly to subtle changes in temperature. Arnold & Dent were granted the Royal Warrant in 1838. About this time the relationship between Arnold & Dent started to deteriorate and the partnership ended in 1840.


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Dent went into business by himself and gained the contract in 1844 to supply the Great Clock in Westminster which finally put the seal on Dent’s fame and fortune. The Westminster Clock became popularly known as Big Ben.

John Roger Arnold died in 1843 and Dent continued in business until his death in 1853.

References:-

‘John Arnold & Son’ by Vaudrey Mercer.

'Edward John Dent & his Successors' by Vaudrey Mercer.

‘English Precision Pendulum Clocks’ by Derek Roberts.


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