PATENT OF THE WEEK – DRILL CHUCK

The DRILL CHUCK was invented by George W Emrick on the 16th of September 1930, bearing patent number US1775994A.

This present invention generally relates to drill chucks and particularly to devices of this class having means for firmly engaging a drill or other tool and for quickly releasing such tool whenever desired, and particularly to chuck devices such as disclosed in my prior application, bearing Serial Number 357,648, led April 2li, 1929, and the principal object of my invention is to provide a jaw supporting and operating unit for chuck devices of the class specified, which by virtue of its construction and assemblage of parts may be inserted and removed from the casing of the chuck as a unit, facilitating the replacement thereof Whenever necessary or desirable; a further object being to provide a unit of the class specified involving a collar in free screw threaded engagement with the casing of the device, a sleeve permanently coupled with said collar and with which the collar is freely rotatable as well as readily movable, and a thrust ring disposed within the sleeve and upon which the inner or upper ends of the jaws supported in connection with the sleeve are adapted to operate in taking up the thrust as well as the arrangement of a. plurality of bearing balls between the opposed surfaces of the ring and said collar with means for preventing the displacement of said balls; a still further object being to provide a unit of the class specified wherein the thrust ring is provided with an angular bearing face arranged at right angles to the longitudinal plane of the jaws to prevent excessive friction and binding of the jaws in connect-ion with said unit, the upper ends of the jaws having flat surfaces adapted to engage the beveled surface of said ring; and with these and other objects in view, the invention consists in a device of the Class and for the purpose specified, which is simple in construction, efficient in use, and which is constructed as hereinafter described and claimed.