l springs', so The device herewith illustrated is not open to an objection illustrated herewith. The screw is made with a gimlet point as to work at an incline of a consid- made to some other elastic door stops, viz., that, when the erable angle. door strikes the stop, it is thrown back again. In… … serted. greater space, and does not strain the thread of either screw Its construction will be readily understood on reference to The manufacture ef the improvement, except the dliving of or nut; while brass will hold a stronger thread than gray the engraving. the brads/may be done entirely by…
Patents · Iron · Plumb · Apparatus · Machine · Antedated march · Improved · Steam boilers · Special attention · Plumb rule · Patent office · Flat bar · Turbine water · Practical instruction · Scientific American · Sewing machine
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