General Information

Serial #

3729

Part Number

1

Total Parts

8

AKA

N/A

Patents

N/A

General Description

METAL, GLASS & WOOD COMPONENTS; SOME MINOR SYNTHETIC FITTINGS.

Dimensions

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

Length

72.0 cm

Width

38.0 cm

Height

127.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Medical Technology

Category

Medical equipment

Sub-Category

N/A

Manufacturer

AKA

HAAG STREIT

Country

Switzerland

State/Province

Unknown

City

Berne

Context

Country

Canada

State/Province

Ontario

Period

THIS SLIT LAMP OPHTHALMOMETER MAY HAVE BEEN USED C. 1955- 1996. THIS TYPE USED C. 1950S+

Canada

THIS INSTRUMENT USED IN OFFICES OF DR. JAMES DONALD ALLEN, A WELL KNOWN OTTAWA OPHTHALMOLOGIST AND DISTINGUISHED GRADUATE (1931) OF QUEEN'S UNIVERSITY, KINGSTON, ONT. HE PURCHASED THIS INSTRUMENT FROM IMPERIAL OPTICAL CO, LTD., TORONTO, CANADA'S FOREMOST OPHTHALMOLOGICAL EQ. DISTRIBUTOR C.1950S-LATE 80S.

Function

USED TO OBSERVE THE TRANSPARENT STRUCTURES OF THE EYE.

Technical

EXAMPLE OF SLIT LAMP MICROSCOPE, USED TO OBSERVE TRANSPARENT STRUCTURES OF THE EYE. IT IS FITTED WITH AN ULBRICH DRUM AND MEASURING EYEPIECE, WHICH PERMITS SURFACE AND MEASUREMENTS IN DEPTH TO BE MADE OF THE EYE. THE TONOMETER COMPONENT MEASURES INTRAOCULAR PRESSURE. HRUBY LENS ATTACHMENT PERMITS OBSERVATION OF POSTERIOR SECTION OF EYE. SLIT LAMP MICROSCOPY ORIGINATED IN GERMANY C. 1910-35.

Area Notes

Unknown

Details

Markings

"HAAG- STREIT/ LIEBEFELD- BERN/ Made in Switzerland" stencilled in silver on stand. "HAAG-STREIT/ BERN" printed on several areas/components. "No 3729/ SWISS MADE " incised in white on upper left of instrument. "HAAG-STREIT/ BERN/ 8705070/ SWISS MADE" incised on tonometer housing. "No. 3729" incised in frame, below operator's face guard. Plate fixed to transformer control (lower left side, below table top) marked "Transformer 110/125/145/160/220/250-V main Voltage./Adjustment inside transformer box", in English, German, French and Spanish. "Patents for/ Britain No. 423,175/ 499,112/ Canada 391,575/ U.S.A. 2,216,387/ and other countries./ made in Switzerland" printed on column supporting various optical components. Paper label inside table drawer reads " VergröBerungen/ Agrandissements/ Magnifications/ Aumentos/ Okular 6x/ Oculaire 6x/ Eye-piece 12x/ Ocular 12x/ Objektiv 1,6x/ Objectif 3,3x/ Objectiv 1,6x/ Objetivos 3,3x/ Total 9,5x/ 19x/ 20x/ 40x ", in chart form.

Missing

UNKNOWN. SOME AUXILLIARY LENSES BELIEVED MISSING. INSTRUMENT HAS BEEN MODIFIED BY ADDITION OF SEVERAL COMPONENTS, INCLUDING TONOMETER & HRABY ATTACHMENT.

Finish

PREDOMINANTLY BLACK; SOME BRIGHT SILVER COLOURED METAL COMPONENTS.

Decoration

N/A