| 摘要 |
PURPOSE:To enable to wireless-control the energizing of load by a method wherein an resonator arranged on a top plate is operated by means of an operating unit so as to change the frequency of a voltage controlling oscillator equipped in a kotatsu (foot warmer) in a frame work. CONSTITUTION:The voltage controlling oscillator 1, a detector 6 for detecting signals being synchronized or unsynchronized, and electrode plates 2A and 2B, all of which are provided within the kotatsu 19, are electrically connected with a reactor 4 and a capacitor 5, both of which are connected in parallel with electrode plates 3A and 3B so as to form a parallel resonator, all of which are provided within the top plate 20 by placing the electrode plates 2A and 3A as a pair and 2B and 3B as another pair opposite to each other respectively. Furthermore, a programmable unijunction transistor 12 is so constituted by being connected to a series circuit comprising the detector 6, an amplifier 7, a detector 8 and a comparator 9 as to be given low voltage in case of synchronization and high voltage in case of unsynchronization. In addition, the transistor 12 together with resistors 10, 13 and 15 and a capacitor 11 form a relaxation oscillator, the output frequency of which is changed by means of the voltage applied to the transistor 12 in order to control the load 18 through a detector 16 and a controlling circuit 17 and as well as controls the voltage controlling oscillator 1. |
