chaser

noun

Etymology: Etymology tree English chase Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English chaser From chase (“groove; decorate metal”) + -er.

1. Someone who chases (decorates) metal; a person who decorates metal by engraving or embossing.

   “"Mr B., heraldic chaser, says there are several processes in making heraldy plates, sketching, engraving, embossing, chasing and burnishing." "H. & C., manufacturers of cloth and gilt buttons, say it requires some weeks to learn to chase the gilt buttons, which are done with small metal tools and a hammer. Chasers are paid by the piece, working ten hours a day, and some can earn $1 a day."”

   “"Flat chasing in sunken or low relief is a technique by which the ornament is formed by beating down the ground from the front. This is done in essentially the same manner as repoussé work, where the ornament appears in high relief, but the design is punched from the face of the silver plate. ... Sometimes, instead of applying a freehand design, the chaser covers the greased surface with a paper pattern in which the design is pricked with pins."”

2. A tool used for cleaning out screw threads, either as an integral part of a tap or die to remove waste material produced by the cutting tool, or as a separate tool to repair damaged threads.

   “In Fig. i is shown one of the chasers in the position which it occupies in cutting a thread.”

   “"Many screw threads are also finished completely with chasers of this type, although they are not adapted for extremely accurate work unless the teeth are ground after hardening, because the pitch of the chaser teeth is affected more or less by..."”

3. A chase gun.

   “bow chaser; stern chaser”