rotator
Date1920-1940
Inventory NumberWJ0148
ClassificationRotator
Subject
Maker
Grant Gear Works
fl. 1900 - 1940
Cultural Region
Place of Origin
Dimensions23 x 28 x 20 cm (9 1/16 x 11 x 7 7/8 in.)
Material
DescriptionA motor is fixed on a rectangular base. The motor puts a turntable in circular motion. A small spike on the periphery of the turntable was used to attach a hook of some sort, which would interact with an electrical contact at each revolution of the table. The turntable is linked to a two-gear mechanism supported by a stand on two pillars fixed on the base. The exact function of this electrical set-up is unknown.
Signedon motor: GRANT GEAR WORKS BOSTON, MASS.
ProvenancePsychology Department, William James Hall, Harvard University.
AO Instrument Company, Warner Chilcott Laboratories
Date: circa 1965
Accessories: Instruction manual (in instrument file); two plain face plates for the drop counting unit and two aluminum rods.,
Object number: 1996-1-0465
W. Watson & Sons Ltd.
Date: circa 1885
Accessories: oculars (2 pairs): B and D; objectives in marked canisters (4): 1/4, 1/2, 1, 3 inches; condenser with iris diaphragm; rotating wheel diaphragm; iris diaphragm; set of 4 disk diaphragms in brass box; triple nosepiece; live box; prisms for Wenham binocular system (2); stage for simple microscope with rotating wheel diaphragm; vulcanite stage; spare knobs (2); parts box; case
Object number: 1249
Taylor Instrument Companies
Date: circa 1925
Accessories: stored within the case: paper recording chart, a length of flexible hose, a bulb and glass container with red recording ink
Object number: 2010-1-0020
Rek-O-Kut Company
Date: 1949
Accessories: instructions packet in envelope. Small bag of screws, wooden panel, small lamp with wire.
Object number: DPWN0055
George Gilbert Rakestraw
Date: 1878-1905
Accessories: microscope in its box (2004-1-0339b) ; bullseye condensers (2003-1-0339c,d); mineralogy books (in the CHSI library)
Object number: 2004-1-0339a