General Information

Serial #

MPC 2002

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

STEEL, BRASS & OTHER METALS. GLASS OPTICAL ELEMENTS - BOTH.1-.2. STORED IN WOODE CASE; SOME AREAS PADDED WITH FELT

Dimensions

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

Length

64.5 cm

Width

19.0 cm

Height

35.3 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Photogrammetry

Sub-Category

N/A

Manufacturer

AKA

Williamson

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

THIS TYPE OF PROJECTOR USEDC.1945-1970S.

Canada

FIRST PHOTOGRAMMETRIC PLOTTER PURCHASED & USED FOR CIVILLIAN MAPPING WORK IN CANADA WAS WILLIAMSON ROSS SP-3 [NMST NO. SP0940]. IT WAS BOUGHT BY EMR IN 1948. THIS PROJECTOR MAY BE ORIGINAL TO PLOTTER [SP0940 INCOMPLETE WHEN ACQUIRED FROM EMR IN 1987].

Function

TO PROJECT THE IMAGE OF A PHOTOGRAPH OR DRAWING ONTO A TABLE, WHERE IT CAN BE TRACED OR COMPARED WITH ANOTHER DRAWING.

Technical

WILLIAMSON ANAGLYPH PLOTTING INSTRUMENTS WERE EXTREMELY SUCCESSFUL & SOLD WORLDWIDE. ROSS-WILLIAMSON SP-3 INTRODUCED IN 1945, & DESIGNED TO USE 6-INCH (WIDE ANGLE) PHOTOGRAPHY. THEY WERE USED IN COMBINATIONS OF 2-14 PROJECTORS: BASIC DESIGN PRINCIPLES REMAINED ALMOST UNCHANGED INTO 1970S. IMPROVEMENT/MODIFICATIONS TO WILLIAMSON EQ. CONCERNED CHIEFLY WITH IMPROVING OVERALL ILLUMINATION OF MODEL AREA, & WITH THE SEPARATION OF 2 IMAGES (SEE SP0940 S.I.FILE). THESE SMALL PROJECTORS DID PERMIT ILLUMINATION OF TOTAL DIAPOSITIVE AREA

Area Notes

Unknown

Details

Markings

.1 MFR'S PLATE SCREWED TO BASE READS: 'WILLIAMSON MANUFACTURING CO. LTD./ PHOTOGRAPHIC ENGINEERS/ TYPE M.P.C./ SERIAL No. 2002/ LONDON & READING/ LITCHFIELD GARDENSWILLESDEN GREEN, N.W.10'/ HORIZONTAL ADJUSTMENT SCALE DIVIDED 0-100+, BY SINGLE INCREMENTS. VERTICAL ADJUSTMENT SCALE DIVIDED 0-40, BY SINGLE INCREMENTS. 'ROSS/ LONDON/ NO. 229367 W.A. PROJ.LENS' INCISED AROUND LENS/.2 'MPC/ 2047' HANDWRITTEN IN PENCIL ON MASKING TAPE APPLIED TO CASING/ PT CASE: 'WILLIAMSON-ROSS/ PROJECTOR UNIT TYPE S.P.3/ MADE BY/ WILLIAMSON MANUFACTURING CO. LTD./ LITCHFIELD GARDENS/ WILLESDEN GREEN, LONDON, N.W. 10' STENCILLED IN WHITE ON CASE. 'S-3' HANDWRITTEN IN YELLOW ON CASE END.

Missing

UNKNOWN - NOT COMPLETE. MISSING RED & BLUE FILTERS; LAMP HEAD; PROJECTOR BULB

Finish

.1 PREDOMINANTLY BLACK WRINKLE FINISH, SAVE FINE ADJUSTMENT, TIP, TILT & SWING CONTROLS. SCALES, CARRIAGE & SELECTED COMPONENTS SILVER METAL/.2 SMOOTH, HIGHLY REFLECTIVE BLACK FINISH APPLIED TO CASING EXTERIOR. PT CASE PAINTED BLACK; NATURAL WOOD INTERIOR, WITH SOME GREEN FELT PADS/LINERS.

Decoration

N/A