1

Photo-electric colorimeter

Year:
1938
Language:
english
File:
PDF, 136 KB
english, 1938
2

Toroidal transformers

Year:
1936
Language:
english
File:
PDF, 254 KB
english, 1936
3

Motor protection thermostats

Year:
1939
Language:
english
File:
PDF, 218 KB
english, 1939
4

Air-conditioning controls

Year:
1939
Language:
english
File:
PDF, 200 KB
english, 1939
5

Electromagnetic fatigue tester

Year:
1935
Language:
english
File:
PDF, 248 KB
english, 1935
6

Valve voltmeters

Year:
1941
Language:
english
File:
PDF, 324 KB
english, 1941
7

Magnetic Sorting Bridge

Year:
1944
Language:
english
File:
PDF, 198 KB
english, 1944
8

Thermionic test set

Year:
1939
Language:
english
File:
PDF, 108 KB
english, 1939
9

Radio-Frequency Crack Detector

Year:
1944
Language:
english
File:
PDF, 343 KB
english, 1944
10

Decibel meter

Year:
1934
Language:
english
File:
PDF, 229 KB
english, 1934
11

Photoelectric reflection meter

Year:
1935
Language:
english
File:
PDF, 135 KB
english, 1935
12

Crystal calibrator for R.F. measurements

Year:
1941
Language:
english
File:
PDF, 321 KB
english, 1941
13

A.C. instrument test panel

Year:
1942
Language:
english
File:
PDF, 288 KB
english, 1942
14

Micropowder magnets

Year:
1953
Language:
english
File:
PDF, 194 KB
english, 1953
15

Multi-range valve voltmeter

Year:
1935
Language:
english
File:
PDF, 233 KB
english, 1935
16

Illumination meter

Year:
1934
Language:
english
File:
PDF, 212 KB
english, 1934
17

Transparency comparator

Year:
1937
Language:
english
File:
PDF, 380 KB
english, 1937