General Information

Serial #

N/A

Part Number

1

Total Parts

25

AKA

N/A

Patents

N/A

General Description

PRINCIPALLY METAL; GLASS OPTICS/ SOME SYNTHETIC CORDS, FITTINGS, ETC.

Dimensions

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

Length

213.3 cm

Width

57.5 cm

Height

77.5 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

Bausch Lomb

Country

United States of America

State/Province

New York

City

Rochester

Context

Country

Canada

State/Province

Ontario

Period

THIS TYPE OF EQUIPMENT USED IN CANADA. C. 1946- EARLY 1960s (REF. 2, PP.1-2)

Canada

EXAMPLE OF FIRST TYPE OF PHOTOGRAMMETRIC PLOTTER USED IN CANADA. DURING WWII MANY CANADIAN SOLDIERS WERE TRAINED IN ENGLAND IN MULTIPLEX PLOTTING (MULTIPLEX MEANING MORE THAN STANDARD 2-PROJECTOR SET-UP). IN 1946 THE CDN ARMY PURCHASED WAR SURPLUS EQ., IN 1948 TOPOGRAPHICAL SURVEY ADOPTED MULTIPLEX AS NEW STANDARD (REF.2).

Function

BRIDGING & COMPILATION INSTRUMENT FOR MAP DRAWING.

Technical

MULTIPLEX PLOTTERS PERMIT THE ADJUSTMENT OF A SERIES OF OVER-LAPPING PHOTOGRAPHS AS A SINGLE UNIT. ALL OTHER TYPES OF PHOTOGRAMMETRIC INSTRUMENTS ARE CONFINED TO THE CONSIDERATION OF A SINGLE PAIR OF PHOTOGRAPHS AS A UNIT & ARE WITHOUT PROVISION FOR ADJUSTMENT OF A SERIES OF ADJACENT STEREOSCOPIC MODELS AS A GROUP (REF.1, P.500).

Area Notes

Unknown

Details

Markings

MFR'S PLATE SCREWED ABOVE BEAM READS: 'BAUSCH & LOMB OPTICAL CO./ ROCHESTER, N.Y. U.S.A./ U.S.A. PATENT/ 1,980,657/ [B&L LOGO]/ SERIAL NO [BLANK] 'WA10' INCISED ON PLATES SCREWED TO TOP RIGHT, AND LOWER LEFT & RIGHT OF FRAME/ TRIANGULAR 'B&L' PLATES SCREWED TO LOWER LEFT & RIGHT PORTIONS OF FRAME/ LABEL ON PROJECTOR BEAM READS: 'EMR/ INVENTORY CONTROL/ R.C./ C.R./ 634 007052/ EQ. CODE 6675-21-886/5280/ DO NOT REMOVE' & FRENCH TEXT/ 2 SCALES - 0 TO 360, APPEARS ON EITHER END, ABOVE ADJUSTMENT WHEEL/ '12' WRITTEN IN PENCIL ON ONE END CAP.

Missing

1 PROJECTOR BASE & 2 PROJECTORS (PHOTOS TAKEN ON SITE SHOW 9 PROJECTOR BASES) PROJECTOR .21 DAMAGED/ NO B&L TRACING TABLE ACCOMPANIEDTHIS UNIT/ 3 METAL TABLE LEG PADS (REPLACEMENTS MFD BY NMST)/ ELECTRICAL CONTROL BOX/ BLOWER BOX (SEE SP0940PT)

Finish

BLACK CRINKLE-TEXTURED FINISH ON MOST PIECES

Decoration

NONE