General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL (INCLUDING ALUMINUM & BRASS) & SYNTHETIC MATERIALS OF CONSTRUCTION.

Dimensions

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

Length

18.5 cm

Width

18.5 cm

Height

9.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Horology

Category

Clocks

Sub-Category

N/A

Manufacturer

AKA

HAINES

Country

United States of America

State/Province

New Jersey

City

Englewood

Context

Country

Canada

State/Province

Ontario

Period

THIS CLOCK PRESUMABLY USED C. 1960S- C. 1975.

Canada

USED IN DOMINION OBSERVATORY IN OTTAWA, ONT.

Function

MEASURES AND DISPLAYS SIDEREAL TIME, WHICH IS MEASURED IN RELATION TO THE STARS.

Technical

SIDEREAL CLOCKS ARE IDENTICAL TO STANDARD ANALOGUE CLOCKS EXCEPT THAT THE GEARING IS MODIFIED TO MAKE THEM RUN APPROX. 4 MINUTES FASTER PER 24-HOUR PERIOD. SIDERAL TIME IS THE TIME REQUIRED FOR THE EARTH TO ROTATE SO A STAR RETURNS TO THE SAME POINT IN THE SKY (APPROX.23 HOURS 56 MINUTES 11 SECONDS). ASTRONOMERS USE THE CLOCKS TO LOCATE OBJECTS IN THE NIGHT SKY, & TO KNOW WHERE CELESTIAL OBJECTS ARE DURING DAY.

Area Notes

Unknown

Details

Markings

"SIDERAL TIME" & "HAINES" marked in black on clock face. "DO NOT TURN SECONDS HAND" printed on decal applied to bracket.

Missing

UNKNOWN. SYNTHETIC COVER OVER CLOCK FACE MAY BE REPLACEMENT. BRACKET ADDED BY DO TECHNICAL STAFF TO MAKE CLOCK MORE EASILY READ. (REF. 1)

Finish

BRASS RIM SURROUNDS CLOCK FACE; REMAINDER OF CLOCK CASING PAINTED BLACK; WHITE DIAL FACE; BLACK ROMAN NUMERALS AND HANDS.

Decoration

N/A