 | Cyclopaedia - 1852 - 258 páginas
...: in hot elimates plates of eopper may be used for the panels. The indieator plays in a mortise eut in the upper part of the post, and is let down into its horizontal and raised into its vertieal position by a rope and pulley. The arms are fixed externally one on eaeh side of the post,... | |
 | 1862 - 966 páginas
...indicator for the day signals are made of wood, framed and panelled, for the sake of lightness, t The indicator plays in a mortise cut in the upper part of the post, and is let down into it« horizontal and raised into its vertical position by means of a small rope and a small pulley.... | |
 | Aide-mémoire - 1862 - 506 páginas
...indicator for the day signals are made of wood, framed and panelled, for the sake of lightness. t The indicator plays in a mortise cut in the upper part of the poet, and is let down into its horizontal and raised into its vertical position by means of a small... | |
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... horizontal and raised into its vertical position by means of a small rope and a small pulley. The arms must be fixed externally, one on each side of the post, and must be exactly counterpoised by means of light frames of open ironwork, which become... 