No. 77.
HIGH CANDLE POWER LAMP.
Made by Patterson Lamps Ltd. Type H.C.P. 9.
Construction very similar to No. 76, but fitted with a device for lighting by means of electricity from an external source.
Mean spherical Candle Power = 1.4
Mean C.P. over horizontal
angle of distribution = 2.0
Statutory Order No. 713 from 1913 relating to Type A1, A3 and B1 Patterson Lamps.
Picture of the Patterson Type A1 and A3 lamps
Picture of the Patterson Type B1 Lamp
Statutory Order No. 316 from 1914 detailing amendments to the Patterson A1 and A3 lamps.
