General Information

Serial #

U4085

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Brass housing, synthetic (possible) cable covering and glass dial cover. Extérieur en laiton, avec des pièces en synthetique (possiblement) et verre.

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

31.0 cm

Height

12.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Marine Transportation

Category

Navigation instruments & equipment

Sub-Category

N/A

Manufacturer

AKA

Walker

Country

England

State/Province

Unknown

City

Birmingham

Context

Country

Unknown

State/Province

Unknown

Period

Unknown Inconnu

Canada

Thomas Walker and Son were inventors and makers of nautical instruments in the 19th and 20th centuries. Their firm made logs, which were one of the most commonly used navigation instrument as they allowed sailors to measure distance at sea. The exact Canadian provenance of this artifact is unknown but it is possible that it came into the collection in the 1970s when Ingenium was collecting parts from a group of Canadian government ships built during the Second World War that were decommissioned in the 1970s. Thomas Walker and Son étaient des inventeurs et des fabricants d’instruments nautiques aux XIXe et XXe siècles. Leur entreprise fabriquait des rondins, qui étaient l’un des instruments de navigation les plus couramment utilisés car ils permettaient aux marins de mesurer la distance en mer. La provenance canadienne exacte de cet artefact est inconnue, mais il est possible qu’il soit entré dans la collection dans les années 1970 lorsque Ingenium recueillait des pièces d’un groupe de navires du gouvernement canadien construits pendant la Seconde Guerre mondiale qui ont été déclassés dans les années 1970.

Function

Device used to measure the speed of a vessel through water or the distance sailed in a given time. Utilisé pour mesurer la vitesse d'un navire dans l'eau ou la distance parcourue dans un temps donné.

Technical

“Probably the most successful of the large, electric ship-logs. Introduced in 1934. Was used in conjunction with a wheelhouse repeater which allowed the log to be read in the charthouse rather than having to walk aft to check the reading of the taffrail. Distance run could be checked at a glance and any problems with a fouled rotator would be noticed more quickly. At one stage use with a copper cored log-line to combat the sharks but the line proved to be inflexible and inaccurate. Dispatch date from the Walker’s records - 1941.” (ref.2)

Area Notes

Unknown

Details

Markings

Cast into the ring on the face: "UNSCREW CARRY BY CHAIN NEVER BY CABLE"/ Dial is marked around the outside in increments of 10 from 10 to 100/ On smaller inset dial in lower proper right of main dial: "500/ 400/ 300/ 200/ 100/ MILES"/ On smaller inset dial in lower proper left of main dial, marked 0 to 9 in a counter clockwise direction/ Marked on the face: "Walker's/ 'TRIDENT' ELECTRIC/ Mark III/ Thos Walker & Son Ltd/ Birmingham/ MADE IN ENGLAND"/ Stamped into the back of the dial casing: "U4085"/ Cast in rear portion of casing: "WALKER'S 'TRIDENT' ELECTRIC SHIP LOG/ MARK III/ CHERUB ROTORS USED/ TRADE MARK/ USE WALKER'S SOLIDIFIED OIL/ UNSCREW [arrow pointing to right]/ Cast into the rear cap: "UNSCREW [arrow pointing clockwise]"

Missing

Does not have an accompanying rotor, but appears otherwise complete. Il n'y a pas un rotor, mais il semble autrement entier.

Finish

Dark, soiled brass-coloured metal housing, a white dial with black markings, a black-brown coloured cable with off-white discolouration, and a brass-coloured connector end. L'extérieur est métal en couleur de laiton foncé, un cadran blanc et noir et un câble en couleur brun foncé avec un connecteur en couleur de laiton.

Decoration

N/A