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Charles Showell
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Individual
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Individual
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Publication of GB190222640ApublicationCriticalpatent/GB190222640A/en
22,640. Showell, C. Oct. 17. Window opening and closing apparatus. - The toothed arm 6, used for opening and closing casement windows, is made V-shaped on its upper edge 7, and is held down upon the toothed pinion or worm-wheel, by means of a grooved roller 8. In the modified form shown in Fig. 3, the arm is grooved and the roller is V-shaped.
GB190222640D1902-10-171902-10-17Improvements in Casement Opening and Closing Mechanism.
ExpiredGB190222640A
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