General Information

Serial #

N/A

Part Number

4

Total Parts

4

AKA

N/A

Patents

N/A

General Description

Glass bulbs containing mercury and with metal connections

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

N/A

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Lighting Technology

Category

Lighting devices

Sub-Category

N/A

Manufacturer

AKA

Cooper Hewitt

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

Used by Mapping Branch of federal department of Energy, Mines and Resources.

Function

Unknown

Technical

Example of a photographic system once commonly used for copying documents. Main unit consists of the camera, which contains a roll of photosensitive paper, a built-in paper cutter, and trays containing fluids for developing and fixing the exposed image. A darkroom is not required. The resulting copy, or "photostat" is a negative image. The operator makes positives by copying this negative. Although focus and exposure settings are simplified, Photostat machines do require a trained operator. For this reason, and because the copying process is slow and the chemicals and paper expensive, Photostat machines were rendered obsolete by the perfection of dry process, electrostatic copiers like the Xerox.

Area Notes

Unknown

Details

Markings

Manufacturer info stamped on lamp bulbs read: "COOPER HEWITT/ [Company logo]/ ELECTRIC COMPANY/ 160-A9T2S1/ 60K"/Expiry date stamped on lamp bulbs read: "FEB 20 1970"

Missing

Appears complete

Finish

Unknown

Decoration

N/A