Magnetic deviation detector

+ -

Tooled morocco coverd box: 12 x 8.752 (30.5 x 22.2cm)
Box contents:
Two sights; two green filters; lead disc; three index arms (2 brass and 1 lead); one shadow pin (brass) in two parts.
Printed specification of Robertson's patent, two printed trade cards with description and drawing of the detector.
Printed Testimonial for Captain Robertson by S M Saxby RN.

Back to Search Results

Buy a print License an image

For more information about using images from our Collection, please contact RMG Images.

Object Details

ID:	NAV0464
Type:	Magnetic deviation detector
Display location:	Not on display
Creator:	Robertson, Charles
Date made:	1856
Credit:	National Maritime Museum, Greenwich, London
Measurements:	60 mm x 305 mm x 222 mm
Parts:	Magnetic deviation detector Magnetic deviation detector index arm (NAV0464.1) Magnetic deviation detector index arm (NAV0464.2) Magnetic deviation detector index arm (NAV0464.3) Magnetic deviation detector filter (NAV0464.4) Magnetic deviation detector filter (NAV0464.5) Magnetic deviation detector shadow pin part (NAV0464.6) Magnetic deviation detector shadow pin part (NAV0464.7) Magnetic deviation detector disc (NAV0464.8) Magnetic deviation detector patent (NAV0464.9) Seal lid (NAV0464.10) Base lid (NAV0464.11) Duplicate specification for the magnetic deviation detector (NAV0464.12) Duplicate specification drawing for the magnetic deviation detector (NAV0464.13) Printed specification (NAV0464.14) Magnetic deviation detector trade card (NAV0464.15) Magnetic deviation detector trade card (NAV0464.16) Printed testimonial (NAV0464.17) Instructions (NAV0464.18) Letter (NAV0464.19) Letter (NAV0464.20) Extracts from the English encyclopedia of Arts and Sciences on the Deviation detector (NAV0464.21) Box (NAV0464.22) Packaging (NAV0464.23)