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US710244A
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Revolving group-flashing apparatus.
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FR313E
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Improvements in eclipsing screens combined with rotating flashing optical devices for groups of splinters for headlights, signal lights and the like
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GB190118820A
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Improvements in Group-flashing Apparatus
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GB190006406A
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Revolving Group-flashing Apparatus for Lighthouses, Signalling and the like.
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US695371A
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Revolving group-flashing apparatus.
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CA71388A
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Lighthouse signalling apparatus
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US710243A
|
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Eclipsing-screen for revolving group-flashing lighthouse-lights, &c.
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GB189918207A
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Improvements in Eclipsing Screens for Revolving Group-flashing Lighthouse Lights, for Signalling Lights, or the like.
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