Nautical instruments
This part of the collection includes mainly navigational instruments from the early sailing period, the time when ships were made of wood and men were made of steel.
Large and heavy electric wheelhouse log repeater with bulkhead mounting and swing glass face cover. To be used in conjunction with the Excelsior Electric Log. Black scale with three registers. The large one up to 100 miles, two smaller up to 10 and 1000 miles. Patent 3336A. Serial number V 7501. For 24 volt
Catalog: NM.5-44
Date: 1935 – 1945
DH: 12.5×12.5 cm
Signed: Thos. Walker & Son Ltd, Birmingham, England
Origin: England
Condition: in very good condition, wear consistent with age and use
Large and heavy electric wheelhouse log repeater with bulkhead mounting and swing glass face cover. To be used in conjunction with the Trident Electric Log. Enamel scale with three registers. The large one up to 100 miles, two smaller up to 10 and 1000 miles. Serial number Z 9495.
Catalog: NM.5-43
Date: 1935 – 1945
DH: 20×7.5 cm
Signed: Thos. Walker & Son Ltd, Birmingham, England
Origin: England
Condition: in very good condition, wear consistent with age and use
Large and heavy taffrail log with electric box on top. The enamel scale has three registers. The large one up to 100 miles, two smaller up to 10 and 1000 miles. Brass and glass guarded face cover unscrews to reveal the dials. Maker’s name engraved. Serial number Y 3240.
Catalog: NM.5-42
Date: ca. 1940
DL: 29×11.4 cm
Signed: Walker’s Trident Electric Ship-Log
Origin: England
Condition: in very good condition, wear consistent with age and use
Rare connector as a link between the log line and the log clock near the wheelhouse. In an advertisment of 1939 Walker is rather sparse with information on how to use this connector. ‘It is suitable in certain classes of vessels’ and ‘having an exposed brass fore and aft universal joint’.
Catalog: NM.5-40
Date: ca. 1940
HWL case: 17×21.5×11.5 cm
Signed: Walker’s & Son, Birmigham
Origin: England
Condition: excellent
The hand log was first described in 1574 (Sharp, p 5). It consist of a wooden chip with peg, the log line, a reel and a 28 or 14 second sandglass. The chip in the shape of a circle sector and weighted with lead on the arc, is fitted with two lines to the peg, the end of the log line forms the third. After a stray line of about thirty meters, the log line is equally divided into parts of 47 feet 3 inches (14.40 meters) to start with a flag or bunting. Thus at every 47 feet 3 inches knots are placed to denote the number of miles. The chip is thrown astern of the ship and remains static whilst the line is paid out and the ship sails away from it. The number of knots sailed out in 14 or 28 seconds indicates the speed of the ship in miles per hour or knots. Between every knot half knots are marked.
With this log a speed up to 5.5 knots can be determined. The starting point, the zero mile, is marked with a red flag and the first knot is marked with a leather vane. Half knots are indicated by simple lines without knots. The line has been repaired after a break or something like that.
The hourglass of 28 seconds in housed in a wooden house, 13 cm high.
Catalogue: NM.5-26
Date: ca. 1880 – 1900
LD reel: 55×24 cm (21.5×9.5 in)
Signed: not signed
Origin: unknown
Condition: in good and working condition, wear consistent with age and use
Making position by observation of stars is done at twilight. With partly cloudy skies it can be difficult to find the right stars. This star globe helps with it. In the lid of the box there is a paper label with instructions for use.
The wooden deck box of mahogany is dovetailed. On the front two clasps for locking with a safety device against unforeseen opening. The lid contains the instructions for use and two grease pencils.
The globe is in very good condition and mounted in a brass meridian circle. The brass horizon circle carries a azimuth ring with four vertical quadrants and two cursors.
Catalog: NM.5-25
Date: 1975
HWD case: 28×26,5×26,5 cm ( 11×10,5×10,5 in)
D globe: 18 cm (7 in)
Case signed: DRYAD
Globe signed: STAR GLOBE, Kelvin & Hughes, Epoch 1975
Horizon signed: Patt. 6605-99-463-6623
Origin: England
Condition: very well, in working condition, wear consistent with age and use
Elegant divider of wrought iron in nice condition.
Catalog: NM.5-24
Date: 1650-1700
L: 170 mm
Signed: not signed
Condition: perfect for its age, in working condition, wear consistent with age and use
Early chart divider of brass with iron tips in fine condition with irreducible engravings.
Catalog: NM.5-21
Date: 17th century
L: 7 cm
Signed: not signed
Origin: unknown
Condition: perfect for its age, in working condition, wear consistent with age and use
Remarkable navigational protractor with cross piece in a green baize lined mahogany case. With a 0-360 degree scale and four 0-90 degree scales in the quarters. Diameter 30.6 cm.
Made by Chas. Smith, London and used by the War Department.
Catalog: NM.5-19
Date: 1900-1920
D: 30.5 cm (1 foot)
Case:
Signed: C.S © Ltd. And B.033 – W10?VC/1320
Origin: England
Condition: perfect