General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CARDBOARD/ METAL GROMMETS

Dimensions

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

Length

23.6 cm

Width

10.2 cm

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mathematics

Category

Calculating devices

Sub-Category

N/A

Manufacturer

AKA

PERRYGRAPH

Country

United States of America

State/Province

Illinois

City

Maywood

Context

Country

Canada

State/Province

Ontario

Period

C. 1961 +/ DONOR USED THESE SLIDE RULES BETWEEN 1974 & 1985.

Canada

AMERICAN MADE SLIDE RULES USED BY CANADIAN PROFESSIONAL ENGINEER IN HIS WORK IN RADIO COMMUNICATIONS. MR. ROSPLESCH WAS REGISTERED PROFESSIONAL ENGINEER IN ONTARIO & ELECTRICAL ENGINEER FOR GOVT OF CANADA IN WINNIPEG & OTTAWA WHERE HE USED THESE SLIDE RULES BETWEEN 1974-1985.

Function

DEVICE USED TO MANUALLY COMPUTE PARAMETERS USED IN ANTENNA MEASUREMENTS, USED BY ENGINEER.

Technical

EXAMPLE OF SPECIALIZED SLIDE RULE. DONOR DESCRIBES THESE AS TOOLS OF TRADE FOR ELECTRONICSENGINEERS DESIGNING RADIO COMMUNICATIONS LINKS IN YEARS BEFORE SOPHISTICATED COMPUTER PROGRAMS BECAME AVAILABLE. THEY COULD EASILY BE TRANSPORTED FOR USE IN FIELD WHEN RADIO COMMUNICATIONS SYSTEMS WERE BEING INSTALLED OR MAINTAINED.

Area Notes

Unknown

Details

Markings

HANDWRITTEN "M. ROSPLESCH" ON FRONT/ BLACK & WHITE LETTERING ON EACH SIDE READING "TACO/ PARABOLIC/ ANTENNA/ CALCULATOR"/ BLACK LETTERING ON BACK READS "Price $2.50 LM-5/66 Form No. GIT-AA-002" & "Slide Chart Copr. 1961, PERRYGRAF Corp., Maywood, Ill"/ ILLEGIBLE RED STAMP READS "REGISTERED PROFESSIONAL ENGINEER/ M.F.G. Rosplesch/ PROVINCE OF ONTARIO" ON BACK"/ RED LETTERING ON FRONT READS "GOVERNMENT & INDUSTRIAL DIVISION JERROLD ELECTRONICS CORPORATION PHILADELPHIA, PA 19105" & ON BACK "MICROWAVE ANTENNAS 2500 MHz ETV ANTENNAS ANTENNA SYSTEMS RIGID TRANSMISSION LINE"/ BLACK LETTERING, NUMBERS, SCALES ON FRONT, BACK, SLIDE

Missing

COMPLETE

Finish

WHITE & RED FRONT & BACK/ WHITE SLIDE WITH BLACK GRIPS

Decoration

B&W DEPICTION OF PARABOLIC ANTENNA ON FRONT