rtable. tering the opposite surface of the clasped shingle. An upright, forked at its upper end, is pivoted to the long IMPROVED WATER ELEVATOR. arm of the horizontal lever, and is formed at its lower In this device two buckets are preferably employed, end with a wide chisel edge, having two or… … —_ 7 the pressure in the supply pipe has reached the pre- DAVIS’ IMPROVED WATER ELEVATOR. scribed limit. Should this pressure become too greatly reduced, the spring will expand, and by increasing the struction. This shaft is operated by a crank, and is area of the passage, allow more steam to flow…
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