Bach-Simpson Ltd.

Company

Image	Name	Function
	Oscilloscope	nan
	Wavemeter	MEASURES FREQUENCY OF TRANSMITTERS - DEGREE OF MODULATION ETC.
	Ammeter	FOR MEASURING ELECTRICAL CURRENT IN MILLIAMPERES
	Meter, distortion	MEASURES DISTORTION OF TRANSMISSION
	Volt-ohm-microammeter	A device which reads microamperes, volts, & ohms.
	Voltmeter	TO MEASURE VOLTAGE SUPPLY (PROBABLY 24V) TO A 1% ACCURACY
	Test set, telephone repeater	TO MEASURE THE AMOUNT OF VOLTAGE PASSING THROUGH A REPEATER.

1953-01-01

Ongoing

1255 Brydges St., London, ON (1956)

109 Meg Drive, London, ON (2023)

Metrology

Electricity

Indicating

Transportation

Supplying

Importing

Manufacturing

Designing

Subsidiary of: USA Simpson Electric Co., (Chicago, Illinois, USA)

- 1953 - Active and advertising a new instrument movement from 1255 Brydges St., London, ON. “Produced entirely in Canada” (“Core Magnet Movement in the Simpson Sealed Instruments”)

- 1956, Dec. – Marketing Simpson Volt-Ohm Milliammeter from 1255 Brydges St., London, ON. Part of USA Simpson Electric Co., 5200 W. Kinzie St, Chicago, IL, USA. (“Simpson Model 260 Volt-Ohm Ammeter”)


- 1964 - Active at 1255 Brydges Street, London, ON, advertising “Panel Meters and Test Equipment for Industry, Research and Education” (Fraser’s Canadian Trade Directory (1964))

- 2023 - Active at 109 Meg Dr., London, ON, operating as “a division of Wabtech.” (“Bach-Simpson, A Division of Wabtec”)

“Bach-Simpson, A Division of Wabtec” Progressive Railroading (https://www.progressiverailroading.com/railproducts/trackmanufacturerrepsdetails/Bach-Simpson-A-Division-of-Wabtec--1328) [28-08-24]

“Core Magnet Movement in the Simpson Sealed Instruments” Electronics and Communications - Directory and Buyer’s Guide (1953) (https://worldradiohistory.com/CANADA/Electronics-and-Communication/Electronics-&-Communications-1953-11-12.pdf): 13

Fraser’s Canadian Trade Directory (1964): 764, 769.

“Simpson Model 260 Volt-Ohm Ammeter” Electronics and Communications - Directory and Buyer’s Guide 1957 (December 1956) – (https://worldradiohistory.com/CANADA/Electronics-and-Communication/Electronics-&-Communications-1956-12.pdf): 16