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Title: |
1873 Article-F. A. Hull & Co. Reid's Patent Drill & Lathe Chuck |
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Source: |
Scientific American, V29, 04 Oct, 1873, pg. 214 |
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Insert Date: |
7/23/2022 2:21:03 PM |
THE DANBURY DRILL CHUCK
This invention, of which illustrations in detail are herewith presented, is a three jawed lathe chuck, so constructed that the three jaws are simultaneously moved in radial directions by the revolution of a single right and left hand screw. The action is direct and positive, and, it is claimed, cannot clog, set, or in any way get out of order.
In the sectional views, Figs. 1 and 2, A represents the case, Which is made in two parts, suitably secured together, and in the face of which are three slots for the sliding jaws, B B' B'. Resting in bearings in the case is the shaft, C, upon and near the ends of which are formed screw threads, cut in opposite directions and extending nearly to the linear center of the shaft. It will be observed that these screws are of different pitch.
The shaft, C, is directly in line with and above the slot in which move the jaw, B; and from the section, Fig. 2, it will be understood that the latter is provided at its inner end with a segment female screw of least pitch on the shaft; so that, as said shaft is rotated, the jaw, B, is caused to approach or recede from the center of the chuck.
D, Fig. 3, is a yoke piece, through which the screw of greatest pitch passes, and thus actuates it in a direction opposite to the motion of the jaw, B. Upon its under surface are two diagonal grooves into which enter corresponding ribs on the jaws, C’, Fig. 4. As the yoke piece, D, is moved, the jaws, C’, are thereby caused to slide in their radial slots. The motion of the three jaws is made isochronous by a proper patio of pitch between the screw and the shaft.
The main points of advantage claimed for this invention are strength, accuracy, durability and cheapness. It is stated to be the most powerful chuck made, and to hold drills from 0 to 5/8” (full size of the drill). By turning down the shanks to 5/8”, it will retain drills op to one inch inclusive, and this, it is said, without slipping even in the most difficult work.
The chuck has now been in use for six months, giving good and satisfactory results, and is sold with a full warrant as to efficiency, etc.
Patented by Mr. C. H. Reid, August 12, 1873. For further particulars address the manufacturers, F. A. Hull & Co., Danbury, Conn.
US Patent: 141,817
https://www.datamp.org/patents/displayPatent.php?number=141817&typeCode=0 |
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F. A. Hull & Co. Reid's Patent Drill & Lathe Chuck, Fig. 1
F. A. Hull & Co. Reid's Patent Drill & Lathe Chuck, Fig. 2
F. A. Hull & Co. Reid's Patent Drill & Lathe Chuck, Fig. 3 & 4
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