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Electrical vibratory contact maker and breaker.
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Improvements in and relating to Pressure Relief Valves for use in Connection with Engine Cylinders.
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Collar-box and the like.
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Apparatus for adjusting railway-vehicle and like brakes.
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Apparatus for adjusting railway-vehicle and like brakes.
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Apparatus for operating and controlling railway points, signals, crossing-gates, &c.
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Pneumatic railway signaling apparatus.
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Railway signaling.
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Pneumatic railway signaling system and electropneumatic valve therefor.
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