PURPOSE:To obtain a synchronous motor having simple structure and a self start function by forming the motor from a fixed armature, a permanent magnet rotor and a converting means converting the poles of the fixed armature encasing a sliding piece, a brush, etc. CONSTITUTION:The ring two-pole permanent magnet rotor 10 is mounted so that magnetic flux is sealed by a cup 12 while the rotor is turned integrally together with a shaft 14. The two-pole fixed armature 16 is fixed to a bearing 18 of the shaft 14 by means of a bolt 19, and inserted into space between the shaft 14 and the rotor 10. The sliding pieces 20 are divided at every 180 deg. circumferential angle in the circumferential direction of the shaft 14 and mounted, loosely fitted movably only in the axial direction to the shaft 14, and elastically pushed to the right by means of a spring 22. The brush 32 slides and contacts with the sliding pieces 20 when starting. According to such constitution, the light small- sized synchronous motor having excellent efficiency is obtained.

Outside rotor type motor

Dipeptides and method

NEW MATERIAL:The titled alanine compound of formula I (R is halogen, lower alkyl, lower alkoxy, amino, mono- or di-alkylamino, or nitro; n is 1 or 2). EXAMPLE:Etythro-3-fluoro-3-(4-nitrophenyl)alanine. USE:Fungicide, metabolism antagonistic agent, carcinostatic agent, and intermediate for the synthesis of such pharmaceuticals. PROCESS:The compound of formula I is prepared by the reductive amination of a 3-fluoro-3-(substituted)-phenylpiruvic acid of formula II (M is H or salt-forming group) with an iminating agent such as ammonium hydroxide and a reducing agent such as potassium borohydride, at 10-50 deg.C, pref. in a solvent such as water, alcohol, etc.

Tsushima Tadahiko

Papers

Erythroo33fluoroo33 substituted or unsubstituted phenylalanine compound* and its preparation