Abstract: An electrical apparatus applies an electric field, e.g. a r.f. field, in a timed manner such that over a given cycle period, e.g. 24 hours, the field is applied for a selected portion of the cycle period and is switched off for the remainder of the period. The periods may be programmable utilizing a microprocessor. The field strength may be selected so as not to produce significant tissue heating, typically less than approximately 100 .mu.w/cm.sup.2, measured at a system surface.

Abstract: A portable battery powered electrical therapy apparatus for emitting a low power r.f. field to promote wound healing without significant tissue heating, is provided with an improved switch operable once only to switch on the apparatus when it is desired to commence therapy. The apparatus runs continuously until the battery is drained and then the apparatus is disposed of. The electrical circuits, the battery and the switch contacts are mounted in a sealed container, and the switch can be operated without breaking the seal of the container, thus preventing fluids from flowing into the container so as to prevent the formation of an unsterile culture within the container during therapy.

Abstract: A portable therapy device for attachment to a patient to promote tissue healing by exposure to an r.f. field, comprises an oscillator (5) which energizes an antenna having a transmitting element (1) the natural directive pattern of which is modified by a reflector (8) and a parasitic element (10) such that a major part of the r.f. field emitted by the antenna passes to the patient. In another embodiment the antenna is configured to produce a spatially substantially uniform field strength over the area of the patient being treated. The device subjects the tissue to r.f. power levels which produce no significant tissue heating.

Abstract: A high frequency electromagnetic therapy apparatus having one or more flexible induction elements (such as sheathed electrically conductive wire) embodied in a flexible material (such as silicone rubber) and connected into the tuned LC circuit of a high frequency oscillator circuit whereby the frequency of the electromagnetic field produced by the apparatus is determined at least in part by the capacitive coupling between the induction elements and the area of the body being treated.

Abstract: A high frequency electromagnetic therapy apparatus having one or more flexible induction elements (such as sheathed electrically conductive wire 2) embodied in a flexible material (such as silicone rubber) and connected into the tuned LC circuit of a high frequency oscillator circuit whereby the frequency of the electromagnetic field produced by the apparatus is determined at least in part by the capacitive coupling between the induction elements and the area of the body being treated.