IT1261439B - Active safety system for electric tools - Google Patents

Active safety system for electric tools

Info

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
Application number
ITRM930200A
Other languages
Italian (it)
Inventor
Antonino Guarnaccia
Original Assignee
Antonino Guarnaccia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Antonino Guarnaccia filed Critical Antonino Guarnaccia
Priority to ITRM930200A priority Critical patent/IT1261439B/en
Publication of ITRM930200A0 publication Critical patent/ITRM930200A0/en
Publication of ITRM930200A1 publication Critical patent/ITRM930200A1/en
Application granted granted Critical
Publication of IT1261439B publication Critical patent/IT1261439B/en

Links

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>
ITRM930200A 1993-04-01 1993-04-01 Active safety system for electric tools IT1261439B (en)

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)

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