| 摘要 |
415,075. Stays. NEEDHAM, W., Millgate Foundry, Millgate, Stockport, Cheshire. Feb. 16, 1933, Nos. 4715 and 6191. [Class 65 (i).] A hinged manhole cover a or its frame e is provided with a socket f for receiving, as a sliding fit, a bar h adapted to contact with the frame or cover to hold the latter in an upright open position. When the socket is applied to the cover, the bar h may be in the form of a bolt which normally lies within the socket and automatically falls downwards to engage the frame when the cover is opened. Specification 311,566, [Class 107], is referred to. |
