| 摘要 |
388,020. Motors. WARREN TELE. CHRON CO., Ashland, Massachusetts, U.S.A. (Assignees of Warren, H. E. ; Chestnut Street, Ashland, Massachusetts, U.S.A.) July 13, 1931, No. 20094. Convention date, July 14, 1930. [Class 35.] A polarized armature moves in a rotating field in such a way that its axis describes a cone or cylinder, this motion being utilized to obtain a rotation considerably slower than that of the field. For this purpose an armature 16 is polarized by a field, preferably produced by a permanent magnet 15, at right angles to a rotating field produced by a split-phase field magnet 11. The upper end of the armature 16 is toothed internally and rolls on a fixed toothed ring 18, so that it has a slow rotary motion in addition to its rolling motion. This rotary motion is communicated to a spindle 25 by a block 26 at the lower end of the armature 16 formed with grooves with which ribs on the end of the spindle 25 engage. The split-phase field magnet 11 is connected to the permanent magnet 15 through a plate 21 and bolts 23 surrounded by copper rings 24 which choke the alternating flux in the magnet 11 while allowing the unidirectional flux of the magnet 10 to pass. Modifications are described in which the armature has frictional instead of toothed engagement with the second member and in which the second member rotates instead of being fixed. Figs. 14 and 15 show the armature terminating in a polygonal cup 56 of sheet metal with concave sides engaging with a corresponding polygonal block 62. The armature is mounted in a ball-and-socket or like joint 58 and carries a pinion 62 so near to this joint that the effect of the gyratory motion is negligible. In a modification of this form the sheet-metal cup is slotted to form a series of teeth. |
