JPS5485149A - Protective mask for welding - Google Patents
Protective mask for weldingInfo
- Publication number
- JPS5485149A JPS5485149A JP15347177A JP15347177A JPS5485149A JP S5485149 A JPS5485149 A JP S5485149A JP 15347177 A JP15347177 A JP 15347177A JP 15347177 A JP15347177 A JP 15347177A JP S5485149 A JPS5485149 A JP S5485149A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- light
- transmission factor
- gate
- time
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Arc Welding In General (AREA)
Abstract
PURPOSE: To protective mask, enable to intercept harmfull light at the time of welding, by arranging plural liquid crystal apparatus in a part of seeing through window and lowering the transmission factor shutting off supplying voltage at the time of welding and then, increasing the transmission factor supplying voltage at another operating time.
CONSTITUTION: The filter F is arranged piled up plural liquid crystal apparatus 1 on the seeing through window of the mask main body 6. When no welding light is detected by the photosenstive sensor 12, oscillation output is put in the apparatus 1 and the transmission factor is increased, because input voltage of the NOR gate 14 is substantially zero. When welding light is generated, the transmission factor of the apparatus 1 is decreased and harmfull light is intercepted, because input voltage of the NOR gate 14 is made E and oscillation is stopped and then, outputs of the NOR gate 19, 20 are made zero. Also, detailed welding operation is able to carry out by selectively enabling to turn current on one of the plural apparatus 1.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15347177A JPS5485149A (en) | 1977-12-20 | 1977-12-20 | Protective mask for welding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15347177A JPS5485149A (en) | 1977-12-20 | 1977-12-20 | Protective mask for welding |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5485149A true JPS5485149A (en) | 1979-07-06 |
Family
ID=15563286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15347177A Pending JPS5485149A (en) | 1977-12-20 | 1977-12-20 | Protective mask for welding |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5485149A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0535723U (en) * | 1991-09-27 | 1993-05-14 | 株式会社吉野工業所 | Liquid storage container |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5146142A (en) * | 1974-10-18 | 1976-04-20 | Toyo Electric Mfg Co Ltd | JIDOKORYOCHOSEIKI |
-
1977
- 1977-12-20 JP JP15347177A patent/JPS5485149A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5146142A (en) * | 1974-10-18 | 1976-04-20 | Toyo Electric Mfg Co Ltd | JIDOKORYOCHOSEIKI |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0535723U (en) * | 1991-09-27 | 1993-05-14 | 株式会社吉野工業所 | Liquid storage container |
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