JPS5652734A - Safety device for strobe - Google Patents
Safety device for strobeInfo
- Publication number
- JPS5652734A JPS5652734A JP12964779A JP12964779A JPS5652734A JP S5652734 A JPS5652734 A JP S5652734A JP 12964779 A JP12964779 A JP 12964779A JP 12964779 A JP12964779 A JP 12964779A JP S5652734 A JPS5652734 A JP S5652734A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- oscillation
- moving contact
- stationary contact
- strobe
- 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
Abstract
PURPOSE:To prevent the breakage of a transistor for oscillation by providing a bypass between the base and emitter of the transistor for oscillation. CONSTITUTION:When the moving contact 3a of an electric source switch 3 is on the stationary contact 3b side, a main capacitor 13 is charged, and when a predetermined voltage is reached, a neon tube 17 lights to announce the completion of preparation for light emission. If the moving contact 3a is changed over to the stationary contact 3c side, the anode of the neon tube 17 is grounded; therefore, it immediately goes off, thereby indicating that the strobe has been changed over to an unsable state. Thence, the residual charge of the capacitor 13 is discharged through a resistance 15, the stationary contact 3c, the moving contact 3a and a diode 31 forming a bypass line. Hence, the voltage applied across the base and emitter of a transistor 5 for oscillation is absorbed by the diode 31; and therefore the breakage of the transistor 5 may be prevented.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12964779A JPS5652734A (en) | 1979-10-08 | 1979-10-08 | Safety device for strobe |
US06/193,458 US4306281A (en) | 1979-10-08 | 1980-10-03 | DC-DC Converter for electronic flash unit |
DE19803037863 DE3037863A1 (en) | 1979-10-08 | 1980-10-07 | DC / DC CONVERTER FOR ELECTRIC FLASH UNITS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12964779A JPS5652734A (en) | 1979-10-08 | 1979-10-08 | Safety device for strobe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5652734A true JPS5652734A (en) | 1981-05-12 |
Family
ID=15014681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12964779A Pending JPS5652734A (en) | 1979-10-08 | 1979-10-08 | Safety device for strobe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5652734A (en) |
-
1979
- 1979-10-08 JP JP12964779A patent/JPS5652734A/en active Pending
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