Staetshuys Antiquairs B.V.
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Nieuwe Spiegelstraat 45a,
1017 DC Amsterdam,
The Netherlands.
tel.+31(0)20 6200300
e-mail: info@staetshuys.nl
A brass Culpeper-type microscope.
A brass Culpeper-type microscope. An English 18th century brass-cased Compass
An English 18th century brass-cased Compass A fine collection of various corkscrews 19th century
A fine collection of various corkscrews 19th century Rare American Induction machine by Töpler ca.1890
Rare American Induction machine by Töpler ca.1890 A German flowermodel of a violin ca. 1885
A German flowermodel of a violin ca. 1885 Globe by Ernst Schotte Berlin
Globe by Ernst Schotte Berlin A rare "Valentines" display table
A rare "Valentines" display table A 19th century 15inch Terrestrial Table Globe by Cruchley
A 19th century 15inch Terrestrial Table Globe by Cruchley A rare collection of eight didactic fungi model
A rare collection of eight didactic fungi model A very rare French tellurian by J. Forest Paris ca.1875
A very rare French tellurian by J. Forest Paris ca.1875 An 18th century English brass Cuff-type monocular compound microscope.
An 18th century English brass Cuff-type monocular compound microscope. An English Could type pocket microscope ca.1840
An English Could type pocket microscope ca.1840 An English Wimshurst electrostatic induction generator ca. 1895
An English Wimshurst electrostatic induction generator ca. 1895 Several German various didactic botanical models ca.1885
Several German various didactic botanical models ca.1885 A pair of globes celestial and terrestrial floor globes by Gilman Joslin
A pair of globes celestial and terrestrial floor globes by Gilman Joslin An early Pocket Globe by Lane 1811 in original fishskin case
An early Pocket Globe by Lane 1811 in original fishskin case A good original Trippensee Planetarium USA ca.1910-15
A good original Trippensee Planetarium USA ca.1910-15 A rare English Culpeper-type Microscope Mathew Loft type ca.1740
A rare English Culpeper-type Microscope Mathew Loft type ca.1740 A fine English coramandel games compendium ca. 1870
A fine English coramandel games compendium ca. 1870 A rare Celestial Globe by Augustin Fortin, Paris ca.1780
A rare Celestial Globe by Augustin Fortin, Paris ca.1780 A fine early 19th century Telescope by Dollond London
A fine early 19th century Telescope by Dollond London A 19th century eight day mahogany marine chronometer, James McCabe London ca. 1870
A 19th century eight day mahogany marine chronometer, James McCabe London ca. 1870 A 3-inch Newton's pocket globe, England ca, 1820
A 3-inch Newton's pocket globe, England ca, 1820 A 3-inch Newton's pocket globe, England ca, 1830
A 3-inch Newton's pocket globe, England ca, 1830 An American eight-day Deckwatch chronometer by Waltham Watch Co. ca. 1920
An American eight-day Deckwatch chronometer by Waltham Watch Co. ca. 1920 An English Coromandel & Brass Dressing box by Betjemann 1875
An English Coromandel & Brass Dressing box by Betjemann 1875 A fine German "Uhrentrager" timepiece ca. 1850
A fine German "Uhrentrager" timepiece ca. 1850 A late 19th century British vernier sextant signed D. McGregor Glasgow
A late 19th century British vernier sextant signed D. McGregor Glasgow A brass-barrelled flintlock coaching blunderbuss signed Bond London
A brass-barrelled flintlock coaching blunderbuss signed Bond London An English Congreve timepiece signed fecit Bell Winchester
An English Congreve timepiece signed fecit Bell Winchester An unusual World timepiece Maison Delamarche, Paris c. 1885
An unusual World timepiece Maison Delamarche, Paris c. 1885 A German Globe by Ludwig Julius Heymann Berlin ca. 1885
A German Globe by Ludwig Julius Heymann Berlin ca. 1885 Clock Globe by G. Thomas Editeur Paris ca.1890
Clock Globe by G. Thomas Editeur Paris ca.1890 Unusual East German Moonglobe by Rath 1963
Unusual East German Moonglobe by Rath 1963 An 18th century brass octagonal compass sundial
An 18th century brass octagonal compass sundial
Categories » Nautical and Scientific instruments » Rare American Induction machine by Töpler ca.1890
This model of an electrostatic induction generator, very much in vogue for electromedical purposes towards the end of the nineteenth century, is based on the principles of electrophorus and duplicator function. It is derived from the mechanical improvements made between 1865 and 1880 by the physicist August Töpler, the German physicist Wilhelm Holtz (1836-1913) and by J. Robert Voss, a mechanician from Berlin. Voss devised this self-excitation model in 1880, perfecting a machine presented by Töpler the previous year.
The quantity of charge captured through induction by the combs is collected by the two mobile, brass collection rings, the terminal spherules of the spark-gap are each charged by the opposite sign with respect to the sign of the comb with which they are in contact. In this manner the machine is able to produce sparks, at times very long ones, especially if the poles of the spark-gap are in contact with the internal shields of the two Leiden jars. 40cm high 34cm deep 50cm wide
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