風信自記紙の合せ目にペンの支へる事を防ぐ簡單な一案
1933 年 11 巻 1 号 p. 33
詳細
1933 年 11 巻 1 号 p. 33
This method is simply done by making a long thin narrow rising closely and parallel to the joint of cilinder, and a special small rod parallel to the penholder. Thus, when the pen just comes on the joint of recording paper, the small rod reaches on the rising; this put the pen so separate from the seam of recording paper that the pen does not be caught in it.
