Improvements in or relating to electric fences
Номер патента: GB1008992A
Опубликовано: 03-11-1965
Автор(ы): Herbert Cyril Spencer, Robert John Millership
Принадлежит: British Telecommunications plc, British Telecommunications Research Ltd
Опубликовано: 03-11-1965
Автор(ы): Herbert Cyril Spencer, Robert John Millership
Принадлежит: British Telecommunications plc, British Telecommunications Research Ltd
Реферат: 1,008,992. Supply systems for electric fences. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. July 22, 1963 [July 24, 1962], No. 28470/62. Heading H2H. [Also in Division H3] An electric fence is energized from a battery B which is charged during the hours of daylight by a solar generator SG the requisite pulses being generated by a transistor oscillator and fed to the fence by way of an induction coil L 1 . A diode R prevents current flow from the battery B to the solar generator SG. The oscillator comprises transistors TR 1 -TR 3 and a capacitor C 1 which-when the oscillator is switched onis charged by way of resistors R1, R3, R4. Whilst the capacitor C1 is charging transistors TR 1 , TR 2 are cut off. When the capacitor C 1 has acquired a predetermined charge transistors TRI, TR 2 conduct and the capacitor discharges by way of the basecollector circuits of the transistors. Transistor TR 3 then-becomes conductive to energize the induction coil L 1 , the cycle being repeated when the capacitor C 1 has become discharged.
IMPROVEMENTS IN SAFE CAPS OR RELATED TO SAFE CAPS FOR ELECTRICAL PLUGS AND ANALOGICAL DEVICES
Номер патента: EA200501199A1. Автор: Ян О'Коннелл,Мишелл Клэр О-Коннелл,Майкл Иоанноу. Владелец: ДОРМИНА ЮКей ЛИМИТЕД. Дата публикации: 2006-02-24.