| All Patents in class 474/77 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 586,293 | Jul. 13, 1897 | J.E. Smith | Speed Changing Mechanism for Lathes, Drills or Similar Machines |
| | 890,333 | Jun. 09, 1908 | N.D. Chard, M. Shipley | Variable-speed mechanism |
 | 941,506 | Nov. 30, 1909 | C.B. Elmore | Change Speed Mechanism |
 | 962,690 | Jun. 28, 1910 | H. Allen | Driving mechanism for drill-spindles |
 | 1,363,786 | Dec. 28, 1920 | J.G. Hey | Belt-gearing for drill-presses |
| | 1,439,747 | Dec. 26, 1922 | J.F. Mirrielees | Drive mechanism for drilling and like machines |
 | 2,041,578 | May 19, 1936 | H.E. Tautz | Drill press head |
 | 2,473,963 | Jun. 21, 1949 | R.E. McKelvey | Speed selection unit |
| | 2,484,910 | Oct. 18, 1949 | E.D. Vancil, M. Romaine | Variable Speed Mechanism |
 | 2,830,628 | Apr. 15, 1958 | D.D. Pettigrew, Y. Tu | Multi-speed drive for band saws and the like |
