lever-hoist

(lev’ér-hoist), n. A form of lifting- jack employing a lever revolving or reciprocating on a fixed axis. A pair of short arms or stirrups are so attached to the lever that their ends fit into racks set upon both sides, and by catching upon the rack-teeth on alternate sides they enable the lever to raise a weight. Leverian falcon, See falcon, levigate lever-jack (lev’ér-jak), ». A lifting device. It consists of a post, a sliding-rack working in guideways formed in or attached to the post and carrying a step which supports the object to be lifted, a pawl pivoted to the post and engaging the sliding-rack to hold the latter from descending, and a lever which is pivoted to the post, and carries a pawl which engages the teeth of the rack and slides it upward, thus raising the weight. leverock (lev’ér-ok), ». A variant of laverock, for larkl.