IT1261439B - Active safety system for electric tools - Google Patents
Active safety system for electric toolsInfo
- Publication number
- IT1261439B IT1261439B ITRM930200A ITRM930200A IT1261439B IT 1261439 B IT1261439 B IT 1261439B IT RM930200 A ITRM930200 A IT RM930200A IT RM930200 A ITRM930200 A IT RM930200A IT 1261439 B IT1261439 B IT 1261439B
- Authority
- IT
- Italy
- Prior art keywords
- cut
- cables
- contact
- worn
- tool
- Prior art date
Links
- 239000004020 conductor Substances 0.000 abstract 2
Landscapes
- Keying Circuit Devices (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Discharge Heating (AREA)
- Earth Drilling (AREA)
Abstract
The purpose of the invention is to prevent accidental contact with live cables where these have been cut or worn. With this device it is possible to cut off the voltage before there is any contact. The active device of the tool is located in its plug and consists of a low-voltage relay. The control pushbutton, instead of closing the electrical supply circuit of the tool, closes the auxiliary circuit. The conductor that connects the pushbutton to the auxiliary circuit consists of two uneven sets of cables placed around the main power cable and connected in series so as to form only two conductors. Whenever one of the surrounding cables is interrupted (worn or cut) the coil of the relay is de-energised and consequently the power circuit will be opened thereby protecting against any contact with live parts. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM930200A IT1261439B (en) | 1993-04-01 | 1993-04-01 | Active safety system for electric tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM930200A IT1261439B (en) | 1993-04-01 | 1993-04-01 | Active safety system for electric tools |
Publications (3)
Publication Number | Publication Date |
---|---|
ITRM930200A0 ITRM930200A0 (en) | 1993-04-01 |
ITRM930200A1 ITRM930200A1 (en) | 1994-10-01 |
IT1261439B true IT1261439B (en) | 1996-05-23 |
Family
ID=11401667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITRM930200A IT1261439B (en) | 1993-04-01 | 1993-04-01 | Active safety system for electric tools |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1261439B (en) |
-
1993
- 1993-04-01 IT ITRM930200A patent/IT1261439B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITRM930200A0 (en) | 1993-04-01 |
ITRM930200A1 (en) | 1994-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted |