General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL (INCLUDING ALUMINUM) & 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

41.0 cm

Width

41.0 cm

Height

18.0 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. 1950S- C. 1974.

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. SIDEREAL 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

"SIDEREAL TIME" & "HAINES/ Englewood, N.J." marked in black on clock face. "DO NOT TOUCH/ SECOND HAND" incised on plate fixed to face. Switch/dial mounted on right side of cabinet bears graduated scale.

Missing

UNKNOWN: MAY HAVE BEEN MODIFIED WHEN INSTALLED IN CSTM'S HELEN SAWYER HOGG OBSERVATORY. Additional information added by Dave Elliott as of 21/10/2005: This clock is attached to the interior wall of the observatory dome. It covers a cavity within the wall that has four light sockets and a duplex outlet installed. I would hazard a guess that the clockwork mechanism, clock face and perhaps the case cover were at one time mounted directly to the wall. These parts may have been removed and installed in a separate case to make the clock portable for use elsewhwere and also to aid in servicing.

Finish

BLACK CABINET; WHITE DIAL FACE; BLACK ROMAN NUMERALS AND HANDS.

Decoration

N/A