General Information

Serial #

C138470

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

.1 METAL CONSTRUCTION, INCLUDING STEEL; SOME SYNTHETIC FITTINGS/.2 PAPER

Dimensions

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

Length

55.0 cm

Width

20.0 cm

Height

25.3 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Electricity

Sub-Category

N/A

Manufacturer

AKA

Cambridge

Country

England

State/Province

Unknown

City

Cambridge

Context

Country

Canada

State/Province

Ontario

Period

THIS RECORDER PRESUAMBLY USED C. 1920S+.

Canada

PART OF A COLLECTION OF PHYSICS LABORATORY AND CLASSROOM DEMONSTRATION APPARATUS FROM MCMASTER UNIVERSITY. FOUNDED IN 1887 MCMASTER WAS ORIGINALLY A BAPTIST INSTITUTION, AND WAS LOCATED IN TORONTO. IN 1930 THE UNIVERSITY AND ITS STUDENT POPULATION OF 500 WAS MOVED TO HAMILTON, ONT. (REF 1)

Function

TO MECHANICALLY RECORD ELECTRICAL CURRENT OR VOLTAGE VALUES ON PAPER TAPE, OVER AN EXTENDED PERIOD OF TIME.

Technical

EARLY ATTEMPT TO CREATE APPARATUS FOR RECORDING VALUES OF CURRENT OR VOLTAGE WITH PENS AND CONTINUOUSLY ROLLING PAPER. RECORDERS WERE DEVELOPED IN LATE 1890S: MULTIPEN VERSIONS OF SUCH INSTRUMENTS WERE INTRODUCED C. 1910.LARGELY REPLACED IN 1960S-1970S BY INEXPENSIVE ELECTRONIC RECORDERS. ( REF. 1)

Area Notes

Unknown

Details

Markings

.1 " CAMBRIDGE INSTRUMENT CO. LTD. ENGLAND/ C138570 " and logo incised in top of instrument/.3-.4 " J.L. CLARK/ TORONTO- MONTREAL " stamped in blue ink on paper tape rolls.

Missing

APPEARS COMPLETE. From CA of 11/29/2001 by Matthew Bruce: No - appears complete

Finish

.1 MOST AREAS HAVE BLACK ENAMEL FINISH; SOME BRIGHT LACQUER FINISHED COMPONENTS (IE. FITTINGS, KNOBS, ETC.)/.2 BUFF OR OFF-WHITE COLOURED PAPER/.3-.4 YELLOW PAPER

Decoration

N/A