| 摘要 |
A reciprocable shuttle 18 oscillates under the action of oscillating gas pressure and makes a series of voltage generating impacts on a piezoelectric member 5, thereby causing it to generate voltage. The shuttle can generate the oscillating gas pressure in a cylinder 62 by, upon being released by manually operating lever 2 and release rod 8, being biased by a spring 46 into a position where gas is delivered via a valve 30 from a source such as pressure vessel 25 containing compressed gas, returning the shuttle to a rest position where striking rod 44 impacts piezoelectric elements 5. Should pressure in gas supply passage 64 become excessive the manual operation of rod 8 can be over-ridden by a pressure regulation piston 66, thereby latching the shuttle in the rest position. The apparatus can include a plasma generating chamber (fig 2, 232) receiving gas from passage 64, discharging plasma via an outlet (fig 2, 244) and can be used in a hand-held device, by a dentist for treating teeth. |
