South Metropolitan Gas Company Regis House King William Street London EC4

Map Of High Pressure Gas Public Lighting System Of South Metropolitan Gas Company

• full range
• advertisements

Devised a light actuated controller for gas lamps in 1937/8 for use in schools for children with defective sight. This was adapted in conjunction with the Gas Light And Coke Company for use with street lighting. The controller comprises: a photo-electric cell, a sensitive galvanometer relay fitted with maximum and minimum contacts, 3V dry battery and a spring-motor actuated street lamp controller. The complete unit with the exception of the cell is included in an iron box; the cell can be placed in any suitable position. The operation is:

• Daylight falling on the cell produces a current the magnitude of which depends on the intensity of the light.
• The relay, operating on the principle of a moving coil galvanometer, is actuated by the current.
• When the moving coil is deflected it carries with it a conductor which makes contact with one of two points depending upon the amount of current produced by the cell.
• This conductor completes a circuit a energies, by means of a dry battery, a small electromagnet, attached to the starting lever of the spring motor - this operates the gas cock.
• As soon as the gas cock operates in either the on or off position, the contact to the electro-magnet is broken, current ceases to flow from the battery, and the contacts of the relay controller are changed over.

External Links:

Grace's Guide