stop hound (stop hound)

A dog trained to hunt slowly, stopping at the huntsman's signal. Davies (under stop ). Sir Roger, being at present too old for fox-hunting, to keep himself in action, has disposed of his beagles and got a pack of stop -hounds. Budgell , Spectator, No. 116. stoping (sto'ping), n. [Verbal n. of stopel , v .] In mining , the act of excavating mineral ground to remove the ore after this has been rendered acce ible by the nece ary preliminary excavations-namely, sinking one or more shafts or winzes and running drifts. - Overhand stoping, a method of working out the contents of a vein by advancing from below upward, the miner being thus always helped by gravity. It is the method most commonly employed. That part of the material thrown down which is worth saving is raised to the surface, and the refuse rock (attle or deads) resting on the stulls remains in the excavation, helping to support the walls of the mine, and giving the miner a place on which to stand. - Underhand stoping, excavating the ore by working from above downward. In underhand stoping everything loosened by blasting has to be lifted up to be got out of the way. The advantage of this method is that in case the ore is very valuable, le of it need be lost by its getting so mixed with the attle that it cannot be picked out. stop-knob (stop'nob), n. In organ- building , the handle by which the player controls the position of the slider belonging to a particular stop. or set of pipes. When the knob is drawn out, the pipes are ready to be sounded by the keys. The name of the stop is commonly written on the knob. Also called register and stop . See cut under reed -organ. stople (stop'les), a . [ stop1 + -le .] be stopped or checked. [Rare.] Making a civil and staid senate rude And stople as a running multitude. Not to Sir W. Davenant , On King Charles the Second's Return. stop-motion (stop'mō shon), n. In mech., a device for automatically arresting the motion of an engine or a machine, when from any cause it is nece ary to stop suddenly to prevent injury to the machine or material. Stop-motion mechanisms are applied to looms, spinning-, roving-, and drawing-machines, winding-machines, elevators, knitting-machines, and engines. They are divided into two cla es: those operated by some mechanical means, as a weighted arm resting on the thread of a loom, where the breakage of the thread causes the arm to fall; and those actuated by electricity, in which the fall of an arm closes a circuit, and by means of a magnet sets in motion some mechanical device for arresting the motion. In most ma 5968 chines the usual method is the shifting of the belt that moves the machine. In engines the stoppage and fall of the governor closes the steam-valve. Electrical stop-motion appliances, not self-acting, are sometimes used; in case of a break-down the use of a push-button releases a weight that by suitable mechanism shuts off steam from the engine. Fork-and-grid stop-motion, in a power connection with a fork, which when the weft-thread breaks loom, a stop-motion in which a grid on the batten acts in causes a lever to drop and stops the loom.