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

18.0 cm

Width

8.0 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

PERRYGRAF

Country

United States of America

State/Province

Illinois

City

Maywood

Context

Country

Canada

State/Province

Unknown

Period

1950'S-1960'S

Canada

USED IN CANADA IN ASSOCIATION WITH IRRIGATION EQUIPMENT

Function

A CALCULATING DEVICE USED FOR FIELD CALCULATIONS TO DETERMINE LINE FRICTION, PUMP HORSE POWER, LATERAL FRICTION LOSS ETC. OF IRRIGATION LINES.

Technical

Unknown

Area Notes

Unknown

Details

Markings

BLACK OR WHITE LETTERING ON ONE SIDE READS 'RAIN BIRD FRICTON LOSS CALCULATOR/ FOR SPRINKLER SYSTEM MAIN LINE/ Based on Scobey's Ks=.40. Aluminum with quick couplers and spiral Welded Steel 15 years old.' & 'Copyright 1956, National Rain Bird Sales and Engineering Corp. Made in U.S.A. Side-Chart by PERRYGRAF, Maywood, Ill.'/ ON OTHER SIDE 'RAIN BIRD CALCULATOR FOR PIPE SIZE & PUMP H.P./ Use this this for lateral pipe. Use other side for main line pipe and pump H.P.' & 'RAIN BIRD SPRINKLER MFG. CO. (Ltd.), CANADA, 54 E. Cordova St.,VANCOUVER, B.C.'

Missing

N/A

Finish

GLOSSY BLACK,YELLOW & WHITE FINISH

Decoration

N/A