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Troughton & Simms Double Frame Brass Sextant

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Troughton & Simms Double Frame Brass Qintant - Sextant

This Fine Relic Has Been Sold.
Thank you!

ORIGINAL TROUGHTON - SIMMS, LONDON
Double Frame, Pillar, Quintant Sextant!

Giant Troughton & Simmms double frame pilar sextant image

DESIRABLE FAN SHAPED CASE

TROUGHTON & SIMMS were the best of the English instrument makers. This instrument dates from their partnership and belongs in a collection of fine nautical antiques or as an important gift

 
Copyright 2015 by Land And Sea Collection™ All Rights Reserved

PRESENTED is a large size double frame quintant or sextant that was made by Troughton & Simms - London, and carries serial number 2964 on its center limb. The upper portion of the frame is in its original midnight black finish and the arc is brass with a silver insert for the gradations. Edward Troughton patented this design in 1788 and this example is 1/2 inch smaller in height and width than a similar device made by this partnership with a 35xx serial number that we sold in 2014. That was the fourth double frame instrument we discovered and was polished by us for presentation. See http://landandseacollection.com/id1004.html  Polishing is available for this intrument as well for an addional fee.

The instrument's arc is graduated into 150 degrees which classifies it as a Quintant. Brass became the accepted the material of choice for sighting instruments in the later 19th Century because of its strength and durability.  Double frame sextants were expensive to make and never gained the popularity of the more common single, cast-framed instruments. Consequently they infrequently come to market.

Double frame instruments very rare and special so they can be considered a wonderful reminder of navigation instruments of the last quarter of the 19th Century. 
Back of Troughton & Simms Double Frame Pilar Sextant image

The sextant has two straight bar pillar frames that are held together with twenty one pillars, and various screw fittings. There is a turned Rosewood handle. The tangent screw and clamping screw are positioned on the back of the index arm. The device has four square index shades, and three round horizon shades. The telescope is attached to a perpendicular rising-piece which is adjusted in and out by a milled knob. There is also a magnifier traveling over the vernier. The single telescope presents an inverted image. The brass limb is inlaid with a sterling scale from -5° to 150° divided each 5 degrees. The sterling vernier measures from right to left from 0 to 10 in arc seconds. 

 

lower limb of troughton double frame sextant
                           image
 

This is a one time opportunity to acquire an extremely rare and very large example of a double frame, pillar,  instrument from Troughton & Simms, without a doubt, one of England's most distinguished instrument makers!

 
Close-up showing the maker's name image
Troughton & Simms- London Maker's Mark

INSTRUMENT & CASE CONDITION: The instrument has all of its original factory applied black coating. The telescope displays the image upside down which was not unusual for astronomical use. Both mirrors, considering their age, are in very good condition. The swing arm magnifier is complete and in good working order, but does not slide up and down. Both sets of shades, i.e., filters are in perfect condition.  The endless tangent screw turns easily.  The telescope and sighting tube are polished brass with much of their original varnish present. The adjusting wrench for the mirrors is present.

The fan shaped case is in excellent condition and the varnish has pleasantly mellowed with age. There is a pocket for two lens caps on the right side with the wood broken off and the caps missing. There also is a wood slot for an additional sighting tube which is missing.

 
Close-up showing
                           the horizon mirror image
The split image elliptical horizon mirror in remarkably good condition

 

Close-up of index
                           mirror image
The index mirror is also in good condition 

 

 HISTORIC BACKGROUND

Edward Troughton, FRS (October 1753 – 12 June 1835) was a British instrument maker who was notable for making telescopes and other astronomical instruments. Troughton was born at Corney, Cumberland. In 1779, after serving an apprenticeship with his elder brother John, he became his partner and soon established himself as the top maker of navigational, surveying and astronomical instruments in Brittan.

In 1795 he delivered the Troughton Equatorial Telescope to the Armagh Observatory, a 2 inch aperture refractor telescope mounted equatorially, and its first major instrument since its founding in 1790 (It survived into the 21st century also).  He created the Groombridge Transit Circle in 1806, which Stephen Groombridge used to compile his star cataloger.[3] He did not merely build instruments, but designed and invented new ones such as his double frame instrument of 1788.

Troughton was awarded the Copley Medal of the Royal Society in 1809. He was elected a Fellow of the Royal Society in March 1810. In 1826, after John's death and in failing health himself, he took on William Simms as a partner and the firm became known as Troughton & Simms. Troughton was color blind. On his death in 1835, he was buried in Kensal Green Cemetery.

TROUGHTON & SIMMS, THE SUCCESSOR: Troughton & Simms was a British instrument-making firm, formed when Edward Troughton in his old age took on William Simms as a partner in 1826. It became a limited company in 1915, and in 1922, it merged with T. Cooke & Sons to form Cooke, Troughton & Simms. The firm produced hundreds of astronomical instruments such as mural circles, transit circles, sextants, and other astronomical instruments for observatories around the world. Previously, Troughton had been a sole proprietor, and before that he was in partnership with his brother John. John died and Edward took on Simms in 1826. Edward Troughton died in 1835. 

Ref. This maker is is listed in Sextants at Greenwich", "Sextants at Greenwich" by W.E.J. Mozer Bruyns, which catalogs the collection of the British National Maritime Museum at Greenwich, England.

 
 
Double frame
                           sextant housed in open case image
The Troughton & Simms Quintant housed in its case

 

 

The beautiful fan shaped case image
                                The fan shaped Troughton & Simms Quintant has a warm patina of age
 
 

CERTIFICATE: There is no certificate which is customary with very old instruments.

DIMENSIONS:

Arc -5° to + 150°:
Length of index arm     10 1/8"                                                    
Radius of arc                 9 1/4"                                                 
Width of frame at arc    11 1/4"
Index mirror                  45 x 31 mm
Horizon mirror              24 x 27 mm ellipse
4 index shades

3 horizon shades
Weight                           3 Lbs 8 oz   
 
              

CASE: Fan Shaped               13 3/4" x 11 1/4" x  4 3/4"         Weight  3 lbs. 3 oz.

American John Bliss, New York label in
                           case image
                                The American instrument dealer John Bliss, New York label
 
 
 

OUR UNCONDITIONAL NO NONSENSE GUARANTEE: If not completely satisfied with your purchase it may be returned, if without damage, within five days of receipt in its original packaging. Return items must be insured for their full value. Only a prior email authorization by us for the return is required. Shipping charges within the continental United States are included in this offer if the error is due to our fault.  

International buyers welcome, but inquire first. We have satisfied customers in Argentina, Australia, Austria, Belgium, Bermuda, British Virgin Islands, Canada, Chile, Republic of China, Czech Republic, Democratic Republic of Congo, Denmark, Estonia, England, France, Germany, Greece, Holland, Hong Kong, Hungary, Iceland, Indonesia, Ireland, Israel, Italy, Japan, Kuwait, Latvia, Luxembourg, Malaysia, Martinique, Mexico, New Hebrides (Vanuatu), New Zealand, Nigeria, Norway, Nova Scotia, Panama, Philippines, Poland, Portugal, Puerto Rico, Romania, Russia, Saudi Arabia, Scotland, Singapore, South Africa, Spain, St. Maarten, Sweden, Switzerland, Thailand, Turkey, United Arab Emirates, USVI, Vanuatu (New Hebrides) and the Eastern Caribbean. 

STANDARD FORMS OF PAYMENT are Bank wire transfer, cashier's check, money order, or personal check in which case the item will be held until cleared. Our prices are quoted net to us so that the use of credit cards or PayPal incur extra charges. Terms on overseas sales are different. 

Copyright 2015 by Land And Sea Collection™ All Rights Reserved

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