Patent GB-190926267-A (GB)
Title: Improvements in Apparatus for Buffing Metallic Tubes or the like.
Inventor: GAIL JOHN FRANKLIN
IPC: B24B5/38
Filed: 1909-11-12
Granted: 1910-08-04
Abstract: 26,267. Gail, J. F. Nov. 12. Disk and wheel apparatus.-A machine for buffing or polishing metal tubes for metallic bedsteads &c. is constructed with two buffing- wheels, one coarse and one fine, mounted on one shaft, which is rotated and reciprocated while one or other of the wheels is in contact with the work; the tube to be buffed is mounted between headstocks on a carriage adapted to be automatically reciprocated along guides, and is turned through a portion of a revolution after each reciprocation; when the tube has been completely operated on by the coarse wheel, it is automatically swung into contact with the finer wheel, and is reciprocated and stepped round in contact with this wheel, the machine automatically stopping when the operation is complete. The blocks 6, 7, 8, connected together by a rack 9, and supporting a shaft 49, are moved to- and-fro along guide-rods 3, 4 by a pinion 14, mounted on a shaft 10 and driven in either direction by pulleys, to which it is coupled by means of a clutch 21. Two arms 51, adjustable along the shaft 49, support a shaft 54 having arms 56, 65, carrying headstocks 57, 68, between which the article 59 to be buffed is placed. The arms 56, 65 may be swung to present the article to the coarse buffing-wheel 30<1>, as shown, or to the finer wheel 30. The wheels are mounted on a shaft 29 movable to-and-fro axially by a cam 40. The headstock 57 is rotatable and connected by a chain with a star-wheel 89, which is advanced at each reciprocation of the work carriage by means of a cam-surface 101 to present a fresh surface of the article to the buffing-wheel. The mechanism for moving the article from one buffing-wheel to the other and for automatically stopping the machine, consists of a shaft 106 mounted in a boss 105 extending from the central standard 5, to which shaft are secured a ratchetwheel 107 and a notched plate 108. Mounted so as to rotate on the shaft is a pawl plate 110 carrying a pawl 111; upon each reciprocation of the carriage, the pawl plate is rotated by the action of a camsurface 121 on the roller 115 carried bv the plate, and causes the ratchetwheel 110 to rotate sufficiently to bring a fresh notch on the plate 108 under the roller 137 carried by the arm 135. When the article has been completely rotated under one wheel, and the notched wheel 108 has made a half-rotation to bring the deeper notch 109' under the roller 137, the arm 135 drops, and allows a roller 136 to act on the underside of the rear end of a lever 138, and move this lever to release a pin 140, with the result that the arms 56, 65 swing over under spring action to present the article to the finer wheel 30. Continued reciprocation of the carriage further rotates the notched disk 108 until the deep notch 109<1> allows a roller 131 and arm 130 to rise and carry a cam surface 132 into the path of a pin 134, which pin on engaging the cam surface, rotates the shaft 119 to disengage a pin from the forked end of an arm which has hitherto moved the clutch 21 to reverse the carriage upon each reciprocation of the shaft 119 with the carriage; the disengagement of the pin takes place when the clutch is in a neutral position, and consequently the machine stops. To re-start the machine, a wire is pulled which re-engages the pin with the arm 22, and couples the clutch 21.