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Oldham-Wheat lamp |
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A cap lamp designed for full self-service. This lamp, weighing 6-5/8 lb
(3.0 kg), has a 4-V lead-acid battery in a hard rubber case with covers of
stainless steel or nickel-plated hard brass. The switch is magnetically
operated and is situated in a sealed plastic moulding. A 4-W bulb burning
11 h or a 2-W bulb burning 14 h is used. The lamp is of one-piece
construction and no dismantling is needed to charge the accumulator.
Sinclair, 1
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