Paper Capacitor

Astronomy

Accession Number: 2018.ast.74

Description:

This object is a grey rectangular metal box with rounded corners. On the front, there is an orange and blue sticker containing information about the object. The top of the box is somewhat inset with a metal lid. Set vertically in this metal lid there are two identical porcelain roughly conical pieces. Each of these ends in a metal appendage consisting of a bolts, a middle section with a metal arm, and a cylindrical piece with a threaded centre.

Primary Materials:

Metal: Iron Alloy, Aluminum, Paper, Porcelain

Markings:

Stamped on the top of the object: “1675”

On the sticker stuck to the side of the object: “KVO KILO VOLT OIL
TRANSMITTING CAPACITOR
2 MFD.
CONTINUOUS WORKING VOLTAGE
3000 V.D.C.
CAT. No. CR-23

PAPER CAPACITOR

SPRAGUE PRODUCTS CO.
North Adams, Mass. U.S.A.”

Dimensions (cm): Length = 9, Width = 7.8, Height = 15.5

Function:

Excellent: The object exhibits little surface damage. The paper label is slightly separating from the metal exterior of the capacitor.

Manufacturer: Sprague Products Co.

Date of Manufacture: Mid-20th Century

Provenance:

This object was likely moved from the David Dunlap Observatory in Richmond Hill in 2008, upon the sale of the observatory. It was stored at the Department of Astronomy and Astrophysics until 2017, when it was moved to a new storage location in McLennan Physical Laboratories.