Several people have asked me about these time switches and as I
have one complete with instructions I have decided to reproduce it
For instruction leaflet click on links below:
page1 page2 page3 page4
The mechanism has prongs which slide into sockets in the Bakelite housing. You can pull it out to gain access to the terminals and fixing screws.
The unit that I have has a spring reserve and a day omitting
facility. It is one of a range of time switches with switch contacts
rated at 20 Amps extensively used in the 1970's. It has been in use for
20 years in my last home to
control a 3 kW immersion heater.
The head office and works of Sangamo Weston Limited were in Enfield, Middlesex, England.
For more information about Sangamo Weston Limited see the bottom of this page:here
Sangamo still manufacture a modern versions of these time switches (and many others) see:Here for their current range. The postal address is: