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Lot 367
A THEODOLITE BY TROUGHTON & SIMMS, LONDON, CIRCA 1910constructed in oxidised brass with 5in. radius scale, telescope with rack and pinion focusing, scale magnifiers, bubble levels, etc., contained in fitted box with accessories including compass, hand lamp, maker's certificate, labels and lid, including inspection card for 1954, and leather outer case (distressed) -- 7½ x 14½ x 12in. (19 x 37 x 30.5cm.)
Lot 249
Englischer "Everest"-Typ-Theodolit von Dancer, um 1870John Benjamin Dancer, Manchester. Original zaponiertes und brüniertes Messing, Teleskop mit Zahnstangen-Fokussierung, versilberte Skalen und Nonien, 2 Lupen, 3 Stablibellen, 4 Stellfüße, Teleskoplänge eingefahren 35 cm! Start Price: EUR 280 Zustand: (3/3)English 'Everest-Pattern' Theodolite by Dancer, c. 1870John Benjamin Dancer, Manchester. Original lacquered and oxidized brass, telescope with rack-and-pinion focusing, silvered scales and veneers, 2 magnifiers, 3 bubble levels, 4 leveling screw feet, length of the retracted telescope 13 ¾ in. Start Price: EUR 280 Condition: (3/3)
Lot 427
Books, surveying – Leybourne (William, 1626-1716), The Compleat Surveyor or the whole Art of Surveying Land by a New Instrument lately Invented as Also by the Plain Table, Circumferentor, the Theodolite as now Improv’d or by Chain only, 5th edn., in IX books and Appendix, (revised) Samuel Cunn, London, S. Bullard, 1744, tall 8vo, 155pp, engr. frontis. portrait of Leybourne, five fold out diagrams, armorial bookpl. George Oakley Fisher with MS signature of Fisher above with address ‘105 Charlotte Street, FitzRoy Square, W., Auctioneer and Surveyor 1885, flyleaf damp stained, frontis. repaired, bound full calf five raised bands to spine, spine rubbed and faded. (1)
Lot 132
A late 19th century Troughton & Simms Military theodolite, engraved the Star 'B' and broad arrow 'O', 2760. Apparently complete with travel case which was repaired and adjusted by W. F. Stanley & Co, numbered 8433 and dated 24th of November 1908. 25cm in length and 25cm in width. Condition:The small lens is clouded and subject to potential fungus. The larger lens has an obvious fungal spore.
Lot 292
2 Schweizer Präzisionsgeräte von FAVAG, um 1960FAVAG/Neuchâtel. 1) Steuergerät für ein Zeitintervall, mit Zeituhr und Steckkontakten mit französischer Beschriftung, 110/220 Volt, geeignet z.B. für ein Tachistoskop. - Und: 2) Bandchronograph, ähnlicher Aufbau wie bei einem Morse-Empfänger, Federwerkantrieb. Das Gerät verwendet 4 Nadeln anstelle von Stiften, um eine Reihe von feinen Einstichen auf dem Papierstreifen zu erzeugen. Dieses Gerät reproduziert in graphischer Form die Zeitaufzeichnung durch einen Chronometer und das Okularmikrometer eines astronomischen Theodoliten. Mit Haube. Start Price: EUR 180 Zustand: (2-3/-)2 Swiss Precision Instruments by FAVAG, c. 1960FAVAG/Neuchâtel. 1) Control unit for a time interval, with time clock and plug-in contacts with French lettering, 110/220 volts, suitable e.g. for a tachistoscope. - And: 2) Tape chronograph, similar construction to a Morse receiver, spring-drive, with 4 needles instead of pins to produce a series of fine punctures on the paper tape, for reproduction in graphic form the time record of a chronometer and the ocular micrometer of an astronomical theodolite, with lid. Start Price: EUR 180 Condition: (2-3/-)
Lot 307
2 Vermessungsinstrumente1) Nivelliergerät, unbezeichnet, vermutlich Deutschland, um 1900, original zaponiertes Messing, versilberte Skalen, 1 Stablibelle, Teleskop mit Zahnstangentrieb, Länge 35 cm, in Holzkasten. - Und: 2) Theodolit, UdSSR, 1954, Messing, 3 Stablibellen, 4 Ableselupen, Teleskoplänge 22 cm. Start Price: EUR 180 Zustand: (3/3)2 Surveying Instruments1) Leveling instrument, unmarked, probably Germany, c. 1900, original lacquered brass, silver-plated scales, with rod vial, telescope with rack-and-pinion drive, length 13 ¾ in., in wooden box. - And: 2) Theodolite, USSR, 1954, brass, 3 vials, 4 reading magnifiers, telescope length 8 ¾ in. Start Price: EUR 180 Condition: (3/3)
Lot 291
2 Schweizer Präzisionsgeräte von FAVAG, um 1960FAVAG/Neuchâtel. 1) Schaltgerät mit Excelsior-Park-Chronograph, mit 4 Steckkontakten und verstellbarer Lupe. - Und: 2) Bandchronograph, ähnlicher Aufbau wie bei einem Morse-Empfänger, Federwerkantrieb. Das Gerät verwendet 4 Nadeln anstelle von Stiften, um eine Reihe von feinen Einstichen auf dem Papierstreifen zu erzeugen. Dieses Gerät wird verwendet, um in Verbindung mit einem Chronometer und dem Okularmikrometer eines astronomischen Theodoliten deren Zeitaufzeichnung in grafischer Form zu reproduzieren. Mit Haube. Start Price: EUR 180 Zustand: (3/-)2 Swiss Precision Instruments by FAVAG, c. 1960FAVAG/Neuchâtel. 1) Switchgear with Excelsior Park Chronograph, with 4 plug-in contacts and adjustable magnifier. - And: 2) Tape chronograph, similar construction to a Morse receiver, spring-drive, with 4 needles instead of pins to produce a series of fine punctures on the paper tape, for reproduction in graphic form the time record of a chronometer and the ocular micrometer of an astronomical theodolite, with lid. Start Price: EUR 180 Condition: (3/-)
Lot 1130
A RARE TWO-DAY SURVEY CHRONOMETERTHOMAS MERCER, ST. ALBANS, MODEL S. C. 2, SECOND QUARTER OF THE 20th CENTURYThe circular four pillar single chain fusee movement with Harrison's maintaining power, jewelled pivots for the escape and seconds wheels, Earnshaw type spring detent escapement regulated by split bimetallic balance with cylindrical compensating weights, helical palladium balance spring and jewelled endstone, the spotted backplate with spring set-up ratchet and blued-steel pillar and backcock securing screws, the 4 inch circular silvered Arabic numeral twenty-four hour 'sidereal' dial with subsidiary seconds dial incorporating open centre revealing ratchet-tooth wheel for opening and closing electrical contacts with the beat of the escapement at six o'clock, within annotation in red CAUTION: HANDS, FORWARD ONLY below signature THOMAS MERCER, MAKER TO THE, ADMIRALTY, Eywood Rd., St. Albans across the centre, and DOWN/UP, 0-56 power reserve dial numbered 15420 beneath twelve o'clock, with blued steel spade hands and red Arabic five minutes beyond the outer minute track, set beneath a screw-down chrome-plated bevel-glazed bezel incorporating pivoted dust cap to the winding square aperture, mounted onto a disc collar incorporating START/STOP lever and insulated electrical contact screws engaging with sprung contact posts fitted to the exterior of the cylindrical aluminium case, complete with typsy winding key and contained within an outer green canvas covered field case fitted with brass capped corners, leather carrying strap and applied printed metal label inscribed MINISTRY OF DEFENCE, HYDROGRAPHIC DEPT., CHRONOMETER SURVEY, Stores Ref. H.S.527-3635, Serial No. 14240 to front; with a second spare field case and a canvas sheet.The box 17cm (6.75ins) high, 28cm (11ins) wide, 21cm (8.25ins) deep. The chronometer making firm Thomas Mercer of St. Albans was established by Thomas Mercer (1822-60) at North Road, London in 1858 before moving to 45 Spencer Street, Clerkenwell in 1860. Mercer became an active member of the British Horological Institute (established in 1858) where he lectured on the need to modernise the industry and served as honorary treasurer from 1875-95. After occupying several addresses in Clerkenwell Mercer relocated the core of the business to St. Albans in 1874 setting up a factory behind his house at 14-15 Prospect Road. Although the bulk of the businesses work was undertaken in St. Albans Mercer personally made weekly trips to Clerkenwell to deliver/collect parts finished by specialist outworkers as well as visit the Horological Institute. In order to maintain a presence in London Thomas Mercer opened an outlet 18 Westmoreland Road, City Road in 1890. Succuss at the Greenwich trials was also always considered important to Mercer who entered instruments every year; he was placed second in 1881 and his son, Frank, came first in 1911. In 1900 Thomas Mercer accepted an invitation to judge at the Universal Exhibition in Paris but unfortunately caught a cold on the ferry crossing and died soon after his return. The business was subsequently continued by his successors becoming of the most prolific suppliers of chronometers and other timepiece for industrial, maritime and domestic purposes and continued trading in St Albans until 1984. The current chronometer was developed by Mercer for surveying purposes. Fitted with electrical contacts and rated to sidereal time the timepiece is designed to be used in conjunction with a ticker-tape chronograph (see previous lot) and an Admiralty pattern 45 degree prismatic Astrolabe or theodolite (to allow accurate measurement of angular distance, or 'zenith distance' between a given star and the zenith). The very accurate timing of the zenith distance of a given star can provide precise 'local time', and, through comparison with Greenwich meantime, allow accurate longitude and latitude of the observer to be established.
Lot 1013
A FINE VIENNESE LACQUERED BRASS CAMPAIGN THEODOLITE CHR. AND G. STARKE, VIENNA, MID 19th CENTURYThe single short draw focusing telescope inscribed K. K. polytechn. Institut in Wien. Chr. & G. Starke to one side held within oxidised brass frame supporting a spirit level to top and with micrometer screw elevation adjustment to eyepiece end, fitted via a rotating joint onto a horizontal degree circle with fine silver scale and Vernier applied to an arm screwed to the telescope frame, the base with ball and socket sleeve joint for mounting on a tripod, in unusual tooled and textured paper covered 'admiral's hat' shaped carrying case finished to resemble leather and with moulded fabric lined interior incorporating a small selection of accessories; with a wooden tripod, 19th century, incorporating oxidised brass knuckles and threaded instrument mounting socket, (2).The case 12cm (4.75ins) high, case 18.5cm (7.25ins) wide; 11.5cm (4.5ins) deep; the tripod 84cm (33ins) long closed. The current lot was presumably made by Georg Christoph Starke (1794-1865) in partnership with his son, Gustave (1832-1917) suggesting that it was made in around 1850.
Lot 1131
A RARE TWO-DAY ORDINANCE SURVEY CHRONOMETERTHOMAS MERCER, ST. ALBANS, MODEL S. C. 2, CIRCA 1949The circular four pillar single chain fusee movement with Harrison's maintaining power, jewelled pivots for the escape and seconds wheels, Earnshaw type spring detent escapement regulated by split bimetallic balance with cylindrical compensating weights, helical palladium balance spring and jewelled endstone, the spotted backplate with spring set-up ratchet and blued-steel pillar and backcock securing screws, the 4 inch circular silvered Arabic numeral twenty-four hour 'sidereal' dial with subsidiary seconds dial incorporating open centre revealing ratchet-tooth wheel for opening and closing electrical contacts with the beat of the escapement at six o'clock, within annotation in red CAUTION: HANDS, FORWARD ONLY below signature THOMAS MERCER LTD, ST. ALBANS, ENGLAND across the centre and DOWN/UP, 0-56 power reserve dial numbered 18384 beneath twelve o'clock, with blued steel spade hands and red Arabic five minutes beyond the outer minute track, set beneath a screw-down chrome-plated bevel-glazed bezel incorporating dust-cap sealed winding square aperture to glass, mounted onto a disc collar stamped 18384 to underside incorporating START/STOP lever and insulated electrical contact screws engaging with sprung contact posts fitted to the exterior of the grey-speckle japanned cylindrical aluminium case, complete with typsy winding and hand setting keys, rating certificate dated 22nd March, 1949 and Mercer information sheet C 6/61, set in a metal angle reinforced baize-lined canvas covered field case hand-inscribed O.S. 821 A over M.O.D. arrow device to the lid and fitted with leather carry strap; with a ticker-tape recording chronograph, Thomas Mercer, model T. P. A., mid 20th century, the rectangular thick-gauge brushed aluminium box-type frame incorporating brass bushed pivots for the single going barrel movement regulated by an adjustable centrifugal governor, driving a milled aluminium wheel positioned beneath a tensioned jockey wheel to pull through ticker tape fed via a large spool across the top plate, past a pair of solenoids each independently operating a pivoted armature fitted with sharp 'pricker' to mark the ticker tape as it passes beneath, the front with WIND square, 2 SPEEDS, IN FAST and OUT SLOW selection plunger, ON/OFF lever and inscribed MERCER, ST. ALBANS. ENGLAND to centre over number 185 to lower right-hand corner, secured in its original mahogany-framed drop-front box with electrical feeds from paired external contact plugs labelled BATTERY, KEY and CHRONOMETER positioned on the right-hand end, the exterior lined in green painted canvas and with metal reinforced angles, the top indistinctly hand-inscribed W10/W 0002 over M.O.D. arrow device, the front with printed metal plate MERCER, MODEL T. P. A. / 2, MADE BY THOMAS MERCER LTD. ST. ALBANS. ENGLAND, with chrome winding key, contact feed cables, and Mercer information sheet C 7/61, (2).The chronometer case 17cm (6.75ins) high, 28cm (11ins) wide, 21cm (8.25ins) deep; the ticker-tape chronograph case 19.5cm (7.75ins) high, 49cm (19.25ins) wide, 17.5cm (7ins) deep. The chronometer making firm Thomas Mercer of St. Albans was established by Thomas Mercer (1822-60) at North Road, London in 1858 before moving to 45 Spencer Street, Clerkenwell in 1860. Mercer became an active member of the British Horological Institute (established in 1858) where he lectured on the need to modernise the industry and served as honorary treasurer from 1875-95. After occupying several addresses in Clerkenwell Mercer relocated the core of the business to St. Albans in 1874 setting up a factory behind his house at 14-15 Prospect Road. Although the bulk of the businesses work was undertaken in St. Albans Mercer personally made weekly trips to Clerkenwell to deliver/collect parts finished by specialist outworkers as well as visit the Horological Institute. In order to maintain a presence in London Thomas Mercer opened an outlet 18 Westmoreland Road, City Road in 1890. Succuss at the Greenwich trials was also always considered important to Mercer who entered instruments every year; he was placed second in 1881 and his son, Frank, came first in 1911. In 1900 Thomas Mercer accepted an invitation to judge at the Universal Exhibition in Paris but unfortunately caught a cold on the ferry crossing and died soon after his return. The business was subsequently continued by his successors becoming of the most prolific suppliers of chronometers and other timepiece for industrial, maritime and domestic purposes and continued trading in St Albans until 1984. The current chronometer was developed by Mercer for surveying purposes. Fitted with electrical contacts and rated to sidereal time the timepiece is designed to be used in conjunction with the ticker-tape chronograph and an Admiralty pattern 45 degree prismatic Astrolabe or theodolite (to allow accurate measurement of angular distance, or 'zenith distance' between a given star and the zenith). The very accurate timing of the zenith distance of a given star can provide precise 'local time', and, through comparison with Greenwich meantime, allow accurate longitude and latitude of the observer to be established.In practice, once the apparatus has been set-up, the seconds beats of the marine chronometer (synchronised with Greenwich meantime) will be recorded on the ticker tape at up to 1 inch intervals (depending-on the speed setting of the paper feed) through electrical connection to one of the solenoid-operated prickers. The second pricker is connected to a hand-switch (or key) operated by the surveyor observing the star through a theodolite (or prismatic Astrolabe). At the moment the given star reaches its maximum (or chosen) zenith angle the surveyor presses the switch which records this moment, alongside the regular marks of the chronometer, on the ticker tape. By knowing the time at which the chronometer feed was activated the respective time of the star reaching its zenith can be established by simply counting the pricks (for each second) up to the point of the mark created by the observation. Indeed, by taking a ruler and measuring the distance the observed mark occurs between two marks created by the chronometer feed, the time of the mark (in relation to Greenwich meantime) can be ascertained up to an accuracy of around one twentieth of a second.In order to create accurate maps, a location within 50 feet would need to be obtained; this corresponds to a timed observation within 0.03 of a second. With this in mind several observations would need to be taken and any errors in the rate of the chronometer ascertained and corrections factored-in before suitably accurate readings for location can be established. In practice the rate chronometer was often independently checked in the field (both before and after the observations) through comparison with against radio Time Signals transmitted from Greenwich. Markings to the lid of the chronometer box indicates that it was owned by the Ordinance Survey. As such it was likely to have been used alongside aerial photography for small scale maps, particularly in undeveloped or difficult locations, where the location data is governed by a series of points whose positions are fixed by radio Astro Observations.
Lot 26
Scientific Instrument - cased theodolite, numbered 29266 by W.F Stanley & Co of Holborn (label to the inside of the lid numbered to correspond with incised number to the side of the theodolite). Other items in the lot to include a mahogany box, other early 20th century diamond inlaid boxes, writing slope (partial) small bag watch repair tools, mainly modern. (qty)
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2513 item(s)/page