Object StatementTheatre spotlight, carbon arc type, Strand Pattern 501, and power supply unit, metal / paint / plastic / wood, made by Strand Electric, London, England, 1946-1960, used at the Capitol Theatre, Sydney, New South Wales, Australia, 1946-1995
Physical DescriptionTheatre spotlight, carbon arc type, Strand Pattern 501 Sunspot, and power supply unit, metal / paint / plastic / wood, made by Strand Electric, London, England, 1946-1960, used at the Capitol Theatre, Sydney, New South Wales, Australia, 1946-1995
The barn door style sheetmetal lamp housing, focusing apparatus and electrical connection box are mounted on a heavy telescopic tripod stand. Inside the housing is a mechanism, operated via external handwheels, for maintaining optimum separation of the two carbon rods between which the arc of light is produced when in use. A (missing) mirror inside the housing reflects the light forward. In front of the housing is a metal tube through which the light passes, reaching first a glass heat shield, then an iris diaphragm for shaping the beam, a (missing) lens for focusing, and a magazine holding red, blue and amber gels and two empty gel frames. Manual controls are attached for changing the focus and beam angle. There were no carbon rods in the lamp at the time of acquisition. Most metal parts are painted black.
The separate heavy duty inductive power supply, with power factor correction, is housed in a metal box with electrical connectors, ammeter with 1-120 scale AC or DC, two fuses, switch, red indicator light, air vents and carry handles. A three-pin plug connected it to the mains supply, from which it drew 20 amps. It supplied power to the lamp via the electrical connector box attached to the tripod stand.
MarksOn the back of the lamp: 'Strand Electric Sunspot Arc Pattern No 501'.
Below the lens holder: a scale marked from 1 to 8 and the words 'Sunspot Arc serial no 3229.12'.
On base: Grace Bros Removals sticker with handwritten 'Canberra Theatre 2'.
On the power supply unit: a large white handpainted '1' near the ammeter; label 'lamphouse and inductor pilots' below the fuses; and handwritten instructions with circuit diagram and 'Strand Electric London'.