Show improve machines the occupation of large punching machines used in boiler shops and similar establishments has been greatly improved in efficiency and economy recently by a simple system of electric control these machines heretofore have been operated by a foot attachment but this Is cut cut out entirely en tirel and the push button placed at A a point where it is much more accessible two men can by this arrangement do the work formerly requiring three and the work Is said eald to be done la in a much more accurate manner |