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168 
A NEW RAWLIN,GS HALF-DROP WINDOW
Page 93
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SEVERAL usaful features are embodied in a now design of half-drop window produced by Rawlings Manufacturing Co., Ltd., 1-29, Larch Road, London, S.W.12. Mounted upon the top edge of the lower _window is the operating shaft and winding. mechan ism contained within. a casing extending the full length of the window, The operation is by means of a worm gear, which rotates a shaft having on each end a pinion that engages with racks formed on the vertical frames of the upper window. The window . slides :in rattle-proof chrome-leather lined guides, and the movement is smooth and bas a -marked freedom from snatch. • • The winding handle is situated in the centre of the top frame of the lower window,. but may.-be offset if desired. It is fitted with a device to . prevent damage occurring from accidental overwinding in either direction. Within the handle is contained • a springloaded dog clutch, so that should the winding of the handle be continued alter reaching the end of the window's travel, the clutch comes into operation and the handle slips.
The accessibility of the winding handle and the ease of operation should appeal to passengers, whilst the inclusion oE the safety device is a feature which 'Will interest operators.