1963年全国稻螟预测预报办法明确规定,“诱蛾灯点灯时间自天黑起点定4小时”。在我们这地区,点灯时间大约自7、8点钟起至11、12点钟止4个小时。为减少测报人员半夜起床的麻烦,简化测报办法,本站会同城镇钟表商店,定制了一只简易的自动定时开关。经半年试用,性能良好。现将开关构造介绍于下。 “自动定时开关”由电钟和开关装置两部分组成。电钟系市售普通电钟。在电钟单轮(36牙)的右方增加1只牙齿2倍于单轮的齿轮(72牙),暂定名为定时轮,其上附有闸轮1只,均由绝缘板制成。闸轮上的闸牙宽度相当于圆周的1/6,并镶于金属铜片。下方有粗铜丝制成的“弹簧”一只。“弹簧”固定柱由电线连接电源,闸轮中心轴由电线连接诱蛾灯。诱蛾灯的另一线也由电源连接(见图)。电钟单轮慢慢走动,带动定时轮和闸轮,当弹簧与闸牙接触时,因通电而诱蛾灯亮, 1963 National Rice stem borer forecast forecasting method clearly stipulates that the “enticing moth lamp lighting time starting from darkness set 4 hours.” In our area, the lighting time is approximately 4 hours from 7,8 o’clock until 11,12 o’clock. In order to reduce the trouble of newspaper reporters getting up in the middle of the night and to simplify the method of newspaper report, this station will customize a simple automatic time switch with the town clock and watch shop. After six months of trial, the performance is good. Switch structure is introduced below. “Automatic timer switch” consists of two parts of the clock and switchgear. The electric clock is the ordinary electric clock on the market. One tooth is added to the right of the single wheel (36 teeth) of the electric clock, which is twice as long as the single-wheel gear (72 teeth), tentatively named the timing wheel, with one brake wheel attached thereto, all of which are made of insulating plates . The brake gate on the gate width equivalent to 1/6 of the circumference, and set in metal copper. Below the bronze wire made of a “spring.” The “spring” fixed column is connected to the power supply by a wire, and the central axis of the brake wheel is connected by a wire to a lure lamp. The other line of the moth light is also connected by a power source (see photo). Slowly move the clock single wheel, driven by the timing wheel and the brake wheel, when the spring contact with the brake teeth, because of the power of light and moth lights,