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John Fleming Wallace
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Individual
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Publication of GB189906103ApublicationCriticalpatent/GB189906103A/en
Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units
(AREA)
Abstract
6103. Wallace, J. F. March 21. Fastenings for trap gratings. A spring catch, pivoted at d, engages with the frame when the grating is lowered, and is disengaged by a bent - ended key passed through a hole in the grating.
GB189906103D1899-03-211899-03-21An Improved Ventilating Cover for Drain Traps.
ExpiredGB189906103A
(en)