| 摘要 |
1,131,936. Counters. E. E. J. UNDERBERG, and S. A. DOLD. 10 Nov., 1965 [11 Nov., 1964], No. 47692/65. Heading G4D. [Also in Division H2] In a dynamo-electric machine having a stator and a movable member, the stator (in the example shown) has an auxiliary pole 6 connected to a " main " pole 5, the other " main " pole 4 being connected to the " main " pole 5 only. The movable member 2, which is a permanent magnet, thus has a preferred direction of rotation (clockwise in the example shown) (see Division H2). For use as a single-step counter, the stator winding 7 is connected to a source of D.C. with the interposition of a relay, or switches with double reversing contacts, for producing pulses of alternating direction, the relay being energized in synchronism with the articles to be counted. For example, bottles may be conveyed through a light beam causing the operation of a photo-electric cell acting on the relay. The machine may be provided with a further pair of poles together with the associated auxiliary pole, arranged in opposite fashion to the first set of poles, so that positive and negative elements may be fed to the machine, and the machine operates as an integrating counter for forming a total from the positive and negative elements. For example, signals of a weather detector may be converted into control instructions for an electric heating installation. Another example is in programme control of a washing machine for automatic repetition of operations. A linear embodiment is described (Fig. 9, not shown). |
