Abstract: The apparatus is comprised of an analog portion which generates and shapes a high frequency signal transmitted by a treatment head and a logic portion which generates time segment cuts and regulates the amplitude of the high frequency signal.The analog part is comprised of, in cascade, a quartz crystal stabilized high frequency oscillator (1), a modulation stage (2), a preamplification stage (3), a power amplification stage (4) and a bandpass filter (5) whose output is connected to the excitation input of the head (6). The logic part (7) generates a train of pulses which are applied to the modulating input of modulator (2) and is comprised of a digital pulse width regulator circuit (10), a pulse repetition rate regulator circuit (9), a pulse amplitude regulator circuit (11) and a continuous or rhythmic operating period regulator circuit.

Abstract: A programmable thermostat has an associated electronic control circuit. There is a coding matrix and a multiplicity of programs which may be selected via the matrix. The user may select two set points to cause two programs to work in an interrelated manner, one for high heat requirements and one for low heat requirements. A clock may call in the two programs in any pre-selected manner such as: high heat in the morning, low heat as soon as the house has heated, high heat in the evening when the outside temperature falls, and low heat at night.