程和瑞和李运璧介绍的自动关灯装置,解决了诱虫灯的关灯问题。这里介绍作者1961年试装成功的自动开关装置。使用征明,这种开关每20—30天开发条一次便能自动开灯和关灯,但在制作上稍觉麻烦些。 一、材料 挂钟1架,室内用电铃变压器1只,碳捧1根,英规30号漆包线4米,竹片1根,薄铁皮少许,15×25厘米~2矩形薄木板1块。 二、装置法 1.挂钟处理:将挂钟钟摆取下,用竹片将其伸长为原长之4倍(这样处理后短针每转动一周即为24小时)。把原钟面漆白,按图1重新作24等分。用砂纸 Cheng and Rui Li Yun Bi introduction of automatic turn off the light device to solve the light off the trap lights problem. Here is a description of the author of a successful 1961 automatic switch device. The use of Zhengming, this switch every 20-30 days to develop a bar will be able to automatically turn on and turn off the lights, but a little trouble in the production of some. First, the material wall clock 1, indoor with a bell transformer 1, carbon holding a root, British regulations on the 30th enameled wire 4 meters, a bamboo, thin sheet metal a little, 15 × 25 cm ~ 2 rectangular thin wood 1. Second, the installation method 1. Wall clock processing: Remove the wall clock pendulum, with bamboo stretch it to the original length of 4 times (such short-handle after each treatment is a week that is 24 hours). The original clock face paint white, according to Figure 1 re-made 24 points. With sandpaper