er in its sides and bottom, in which run chains on rollers, ends of the jaws may be forced together or the chains being carried by sprocket wheels and pro- allowed to spread apart, enabling the jaws to vided with transverse scrapers moving upward on the be clasped firmly to a bit and be very… … may be quickly and easily effected, when the spring is works entirely. Since the introduction of the meta- TENCH’S CONVEYER OR ELEVATOR. stannic acid putty, however, not a single case of lead secured in place by aclamping bolt, the construction preventing any rattling or loose motion from inaccur-…
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