A high voltage ignition wire (10) has a ferrite core, a coiled wire (14) surrounding the core, and an insulating sheath surrounding the coiled wire.
In order to avoid an oblique position, a thread spiral (2) having two or more courses is used.
The invention relates to a device for detecting variations in the length of components, comprising an optical waveguide (1) which is accommodated in a flexible tube (3) made of twisted wire (4) with adjacent-lying windings.
When the needle is extracted, the thread-spiral remains under skin preserving the compression or extension properties thereof, thereby producing a skin compression or extension effect.
In a second embodiment the stopper is formed by a coiled wire spring (6') realizing a chain passage and applying an elastic force to the chain passing through said passage.
Surprisingly it has now been found that the drug loading capacity can be dramatically increased by filling the lumen of the coil with micro-particles such as microspheres that contain the drug of choice.
Other lens configurations are described, including one based on the funnels of US patent 6,107,628, and another on the coiled wire system of Hutchins et al. (1999).