| 摘要 |
<p>1,154,919. Converting. BROWN, BOVEBI & CO. Ltd. 20 Oct., 1966 [22 Oct., 1965], No. 46997/66. Addition to 1,108,571. Heading H2F. The converter system of Specification 1.108,571, is modified for connecting to a polyphase A.C. supply by providing three switching circuits, the control signals to which are phase displaced by 120 degrees.</p> |
