| (19) |
 |
|
(11) |
EP 0 163 389 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.04.1986 Bulletin 1986/14 |
| (43) |
Date of publication A2: |
|
04.12.1985 Bulletin 1985/49 |
| (22) |
Date of filing: 03.04.1985 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE FR GB IT LI NL SE |
| (30) |
Priority: |
25.04.1984 GB 8410519
|
| (71) |
Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC |
|
() |
|
| (72) |
Inventors: |
|
- Norris, Alan James
()
- McLaine, Colin Grant
()
|
|
| |
|
(57) A hand-held, battery powered, electrostatic spraying apparatus incorporating a device
such as a gas-rap discharge tube (16 or 54) or a buzzer that emits visible or audible
signals to indicate the power supply to the HV generator is switched on.
The signal emitting device is an essential part of the high voltage generator circuit
and/or emits the signals at a frequency of 0.1 to 4Hz.