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Mounted corkscrew
A mounted or bar corkscrew is a device screwed or clamped to a wall or counter top, used to draw corks from beer, wine or other bottles.
== History ==
Corks have been used to seal jars and bottles for over 400 years.〔(Closure types )〕 (Modern, machine made bottles with threaded tops for screw caps date from the 1920s.〔(Screw caps )〕) Early glass bottles were cumbersome (and possibly dangerous, being hand-blown) to hold, and the simple “T” corkscrew required strength to use. People looked for improvements.
The first mounted corkscrews, some time in the mid 1800s, were very simple, consisting of a frame incorporating a bracket that held the bottle down and a metal hook that pulled almost any “T” handled corkscrew up. The helix or worm was turned into the cork, then the bottle was held with the protruding corkscrew in the frame, with the lever hooked onto it. Pulling the lever extracted the cork. The mechanical advantage incorporated into these frames consisted of various types of rack and pinion, gear or lever mechanisms.
Turning the worm into the cork and then turning the cork off of the worm was a time-consuming process. Eventually, the popularity of bottled beer stopped with corks would necessitate the invention of a faster, simpler method of removing the corks.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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