| 摘要 |
542,097. Trackways for gates &c. CROLT ENGINEERING, Ltd., and HOLT, J. A. Sept. 20, 1940, No. 14420. [Class 104 (ii)] A trackway for doors and gates comprises an inverted channel A or an inverted L-shaped bracket, bent inwards at the lower edges to form beadings B which are sufficiently spaced from the sides a to receive the flanges of the grooved runners C. The beading may be bent to U-shape to receive a rod &c. of non-metallic material to form the track. |
