motor
Date1890-1910
Inventory Number1997-1-0545
ClassificationMotor
Subject
Maker
Holtzer Cabot Electric Company
1889 - 1972
Cultural Region
Place of Origin
Dimensions23.2 × 16.8 × 41 cm (9 1/8 × 6 5/8 × 16 1/8 in.)
Material
DescriptionThe base of this instrument, made of metal painted black, is figure-eight-shaped with a circular ear emerging from each of the four "corners". The ears have screw holes in them and could serve to attach the instrument to a surface beneath. Attached to the top of the base, a case contains two tightly wound spools of gold-colored wire; the top half of the case has slatted windows between strips of black metal making the coils visible. The coils constitute electromagnets. On top of the spool case, is a plate of metal, the outline of which is a figure eight. On both sides of the plate, there are insulated wires running from a pair of electrical contacts. Sitting atop this plate is a black band that runs over top a round component that is obscured from view, but that acts as the rotor. There is an angled metal holder and adjustment screw for a black rectangular block visible on one side. This black rectangle acts as the brush for connecting with the motor's split ring. As it wears away, the block can be moved closer by loosening the adjustment screw. The details of the split ring and brush configuration are obscured by the black band casing. On top of this black band is the nameplate. A long thin metal rod (now quite rusted) runs through both sides of the obscured round component and extends quite far to one side of the instrument. Additional metal mechanisms, including at least one binding post, are affixed on either side of the round component.
Signedon nameplate, embossed: MANUFACTURED BY THE / HOLTZER-CABOT ELEC.CO / -BOSTON-MASS- / CLASS M00 No5343D / WINDING __ SPEED 770 / VOLTS 50 AMP. __
Curatorial RemarksNearly identical to 1997-1-0544.
FunctionThis instrument is an electromagnet-powered motor for convertin electric current into mechanical motion. Possibly designed for industrial, rather than demonstrative or personal use.
For a discussion of the development and the workings of electric motors, see Kimball's article mentioned in the related works field.
For a discussion of the development and the workings of electric motors, see Kimball's article mentioned in the related works field.
Gebrüder Haff
Date: 1960-1969
Accessories: plush-lined, hard green case
white card with instrument information in case
Object number: 1999-1-0005
Crosby Steam Gage & Valve Company
Date: circa 1910
Accessories: original and photocopy of letter from Dr. Joachim Fischer in Berlin requesting information and photographs of mechanical integrating devices from William J.H. Andrewes, dated 13 October 1993
photocopy of letter from William J.H. Andrewes to Dr. Joachim Fischer, providing information on the planimeter and requesting details for his desired photographs; original and photocopy of letter from William J.H. Andrewes to Dr. Joachim Fischer, responding to a request regarding mechanical integrators acquired from the Aiken computer laboratory, dated 11 April 1997; letter from William J. H. Andrewes to Dr. Joachim Fischer that accompanied the photographs, dated 26 April 1995; film and eleven color photographs of the instrument, probably copies of those sent to Dr. Joachim Fischer
Object number: 1995-1-0003
Charles Chardin
Date: 1870-1900
Accessories: key; mahogany case
Object number: DW0829
Fabre et Cie
Date: circa 1856
Object number: 5470
William J. Murdock Company
Date: 1910-1950
Object number: RS0163
Nashua Media Products
Date: circa 1982
Accessories: opaque white plastic canister
Object number: 1998-1-0792
ACME Apparatus Company
Date: 1930-1950
Accessories: handle; black cylindrical component; wrapping newspaper
Object number: 1997-1-0516
French
Date: circa 1880
Accessories: protecting case with glass window
Object number: DW0095
P. Grandee
Date: 1720-1750
Object number: 1998-1-1441