Find bausch and lomb microscope from a vast selection of Antiques. Get great deals on eBay! The Balplan Microscope Bausch & Lomb Documentation. The Balplan was the flagship microscope made by Bausch & Lomb Inc. In the 1970's and 80's, before the merger of their microscope operations into the Leitz / Leica company. Since the Balplan is no longer supported by either company, the knowledge base for maintenance on this fine instrument has.
THE SURVEYING INSTRUMENTS OF BAUSCH & LOMB
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Bausch & Lomb Optical Company (now just Bausch & Lomb, Incorporated), was founded in 1853 by John J. Bausch and Henry Lomb. German born, Bausch and Lomb settled in Rochester, New York, where John Bausch started a small business making eyeglasses. He was soon joined by Henry Lomb. The firm remained small until they bought the rights to make eyeglass frames of 'Vulcanite', an early form of hard rubber. By the late 19th century the firm was flourishing with John's son, Edward Bausch, taking a very active role. Edward Bausch added the manufacture of microscopes to the company's product line, and by 1900, the company was making microscopes and accessories, slide and opaque projectors, photographic lenses and prism binoculars--but no surveying or engineering instruments. That changed in 1905 when George N. Saegmuller moved his companyfrom Washington, D. C. to join with Bausch & Lomb in anew firm, the Bausch, Lomb, Saegmuller Company. This new company was established to manufacture geodetic and engineering instruments and, most importantly, rangefinders and gun sighting devices for military use. This firm continued fromthe spring of 1905 to the end of 1907. For some years previously, Bausch & Lomb had been making binoculars and photographic lenses under license to Carl Zeiss, of Jena, Germany; the world's leading optical manufacture at that time. In 1907, Zeiss bought 20% of Bausch & Lomb and about 33% of Bausch, Lomb, Saegmuller. The company was renamed Bausch & Lomb but was known as the 'Triple Alliance' and the new logo featured three prisms, each with the initials of the participating organizations: 'B-L', 'Z' and 'S'. This partnership continued until November 1915 when the conflicts of World War I ended the 'Triple Alliance' because Bausch & Lomb was selling military equipment to Great Britain, Germany's enemy. Production of surveying instruments ceased sometime between the entry of the United States into World War I in April 1917 and the spring of 1918, when production of goods for civilian use was suspended. Bausch & Lomb concentrated its efforts on making rangefinders, gun sights, binoculars, trench periscopes, search light mirrors, optical glass and other materials for military use. At the end of World War I in 1918, Bausch & Lomb decided not to return to making engineering instruments. Competition from long established firms like W. & L. E. Gurley, Keuffel & Esser, Buff & Buff, and C. L. Berger & Sons was too great. Bausch & Lomb had developed a very successful military business which it continued to exploit. ~Thomas Garver
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Transit with auxiliary telescope and counterpoise plummet | |||
Engineers Precise Level donated by David Lee Ingram | |||
8' Theodolite with European 3 screw base | |||
Miniature Alidade | |||
Precise Dumpy Level made to the specifications of the U. S. Coast and Geodetic Survey |
Bausch And Lomb Microscope Models
This is a 19th century Masterpiece microscope made by Bausch & Lomb Optical Co. New York, Rochester NY, Chicago with Serial number 39875. It is a collector's item of the highest quality with interesting provenance. The microscope is constructed largely of highly finished heavy brass with top of the line optics.
The horseshoe type base is extra heavy brass to allow stability with microscope at full inclination. The pillar, consists of a rectangular massive brass column to support the body. A screw with a leaver topped with an ivory cover which serves to tighten or loosen the connections between the stage and body and allow for inclination. The Optical system consists of a brass Body tube with revolving double nose-piece, a Nickel-Chrome plated Draw tube graduated in single millimeters to 220 mm. The tube is adjustable in a cloth lined sleeve and is fitted with a single ocular and two objectives. The tubes are large 30mm in diameter, especially-constructed to permit a large cone of light to pass from the objective. Optical adjustments: Coarse adjustment by diagonal rack and pinion, moving a long prismatic slide accurately fitted, attached to the body. Fine adjustment by micrometer-screw silvered and graduated with 100 divisions, each representing a motion of the objective of 1/100 mm. This mechanism is based on Bausch's U.S. patent No. 577344 from Feb 16, 1897. The Revolving Slide Stage is 100mm (4 inch) in diameter. It is made of brass plate fitted with vulcanite top. Two stage clips hold the glass slide. Substage parts contain the Condenser lens, Iris diaphragm and mirror. The condenser is a Trapezoidal type with a large range of magnifying power from 30 to 800 diameters. Both condenser and diaphragm are attached to the upper substage and can be moved vertically or swing horizontally. The mirror is double-sided with the frame made of brass. It is attached to a swinging arm on the lower sustage and may be brought to any obliquity.
The well-known Bausch & Lomb optical company was founded by two German immigrants, John J. Bausch (1830-1926) and Henry Lomb (1828-1908). Although their association dates back to 1850, they did not formally establish a partnership until 1866. Beginning with the manufacture of eyeglass frames, they gradually expanded their lines of production to include reading glasses and pocket microscopes. In 1874, they produced their first compound microscope. By 1900, Bausch & Lomb had become the leading American manufacturer of microscopes and the third largest in the world after Ernst Leitz and Carl Zeiss.
The provenance of this microscope will be provided privately.
The horseshoe type base is extra heavy brass to allow stability with microscope at full inclination. The pillar, consists of a rectangular massive brass column to support the body. A screw with a leaver topped with an ivory cover which serves to tighten or loosen the connections between the stage and body and allow for inclination. The Optical system consists of a brass Body tube with revolving double nose-piece, a Nickel-Chrome plated Draw tube graduated in single millimeters to 220 mm. The tube is adjustable in a cloth lined sleeve and is fitted with a single ocular and two objectives. The tubes are large 30mm in diameter, especially-constructed to permit a large cone of light to pass from the objective. Optical adjustments: Coarse adjustment by diagonal rack and pinion, moving a long prismatic slide accurately fitted, attached to the body. Fine adjustment by micrometer-screw silvered and graduated with 100 divisions, each representing a motion of the objective of 1/100 mm. This mechanism is based on Bausch's U.S. patent No. 577344 from Feb 16, 1897. The Revolving Slide Stage is 100mm (4 inch) in diameter. It is made of brass plate fitted with vulcanite top. Two stage clips hold the glass slide. Substage parts contain the Condenser lens, Iris diaphragm and mirror. The condenser is a Trapezoidal type with a large range of magnifying power from 30 to 800 diameters. Both condenser and diaphragm are attached to the upper substage and can be moved vertically or swing horizontally. The mirror is double-sided with the frame made of brass. It is attached to a swinging arm on the lower sustage and may be brought to any obliquity.
The well-known Bausch & Lomb optical company was founded by two German immigrants, John J. Bausch (1830-1926) and Henry Lomb (1828-1908). Although their association dates back to 1850, they did not formally establish a partnership until 1866. Beginning with the manufacture of eyeglass frames, they gradually expanded their lines of production to include reading glasses and pocket microscopes. In 1874, they produced their first compound microscope. By 1900, Bausch & Lomb had become the leading American manufacturer of microscopes and the third largest in the world after Ernst Leitz and Carl Zeiss.
The provenance of this microscope will be provided privately.