General Information

Serial #

4359

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL INSTRUMENT BASE/ BRASS & STEEL? WORKING PARTS/ WOOD PARTS/ SYNTHETIC PARTS/ WOOD FRAMED INSTRUMENT COVER WITH GLAZED SIDES & TOP/ WOOD CABINET WITH METAL HARDWARE

Dimensions

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

Length

111.8 cm

Width

55.8 cm

Height

154.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Horology

Category

Timing devices

Sub-Category

N/A

Manufacturer

AKA

NALDER

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

20TH CENTURY

Canada

BRITISH MADE INSTRUMENT USED IN CANADA, POSSIBLY AT DOMINION OBSERVATORY IN OTTAWA, WHICH EXISTED FROM 1905 TO 1970 (RCB 13.9.96)

Function

INSTRUMENT USED TO RECORD TIME DURATION OF ASTRONOMICAL EVENTS. IT RECEIVED TWO TIME SIGNALS WHICH WERE RECORDED ON PAPER COVERED DRUM. ONE PEN RECORDED TIME EACH SECOND FROM STANDARD CLOCK & SECOND PEN WAS ACTUATED BY TAPPING OF KEY BY OBSERVER OF EVENT BEING TIMED. THIS EXAMPLE WAS PROBABLY USED WITH TRANSIT TELESCOPE: ONE SIGNAL CAME FROM CLOCK, OTHER FROM OBSERVER WATCHING STARS.

Technical

BRITISH MAKER NALDER BROS. FL. AT 16 RED LION ST., CLERKENWELL, LONDON, E.C. IN 1894/ CHRONOGRAPH WAS DEVELOPED BETWEEN 1828 & 1850 IN GERMANY & U.S. PRIMARILY TO REDUCE INDIVIDUAL DIFFERENCES IN PERCEPTION OF TIME WHICH DISTORTED ASTRONOMICAL OBSERVATIONS. IT WAS ALSO USED IN SEISMOLOGY & IN OTHER AREAS.

Area Notes

Unknown

Details

Markings

INCISED BLACK LETTERING ON MECHANISM CASING READS "NALDER BROS. & CO./ LONDON/ No. 4359"

Missing

WEIGHTS, PENS From CA of 09/24/1997 by Kevin Machan: Undetermined

Finish

DARK GREEN ENAMEL PAINTED INSTRUMENT BASE & PARTS/ LACQUERED BRASS PARTS/ BLACK PAINTED PARTS/ METALLIC PARTS/ BLACK SYNTHETIC/ BROWN STAINED & VARNISHED WOOD/ COLOURLESS & TRANSPARENT GLASS

Decoration

INSET PANELS OF SAME WOOD WITH MOULDED EDGING ON FRONT, BACK, & SIDES OF CABINET