Connolly & Hutz
Blade adjusting device for a scroll saw
 A blade adjusting device for a scroll saw, using engaging projections on the lower side of a press knob, engaging with projecting or receding parts on the upper side of a catch seat, to transform turning the press knob into an up-and-down movement of the catch seat, thus lengthening or shortening the distance between an upper and a lower protruding arm that hold the blade of the saw, so as to easily mount and dismount the blade and to adjust the tenseness of the blade. 
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Y10T B23D B23D Y10T Y10T
additional inventional inventional additional additional
Chin-Chin
Chang