NL237530A - - Google Patents
Info
- Publication number
- NL237530A NL237530A NL237530DA NL237530A NL 237530 A NL237530 A NL 237530A NL 237530D A NL237530D A NL 237530DA NL 237530 A NL237530 A NL 237530A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA728283T | |||
| NL237530A NL98374C (en:Method) | 1959-03-25 | 1959-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL237530A true NL237530A (en:Method) |
Family
ID=76269553
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL237530A NL98374C (en:Method) | 1959-03-25 | 1959-03-25 | |
| NL237530D NL237530A (en:Method) | 1959-03-25 | 1959-03-25 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL237530A NL98374C (en:Method) | 1959-03-25 | 1959-03-25 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3088057A (en:Method) |
| JP (1) | JPS3718204B1 (en:Method) |
| BE (1) | BE588951A (en:Method) |
| CA (1) | CA728283A (en:Method) |
| NL (2) | NL98374C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3252141A (en) * | 1961-07-31 | 1966-05-17 | Omnitronic Corp | Fail-safe control system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH214265A (de) * | 1940-07-05 | 1941-04-15 | Landis & Gyr Ag | Verfahren zur Fernsteuerung von Arbeitsvorgängen, bei dem die Wahl eines Arbeitsvorganges durch zwei Wechselströme unterschiedlicher Frequenz erfolgt. |
-
0
- CA CA728283A patent/CA728283A/en not_active Expired
-
1959
- 1959-03-25 NL NL237530A patent/NL98374C/xx active
- 1959-03-25 NL NL237530D patent/NL237530A/xx unknown
- 1959-06-24 JP JP2022259A patent/JPS3718204B1/ja active Pending
-
1960
- 1960-03-23 BE BE588951A patent/BE588951A/nl unknown
- 1960-03-23 US US17054A patent/US3088057A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS3718204B1 (en:Method) | 1962-11-22 |
| US3088057A (en) | 1963-04-30 |
| NL98374C (en:Method) | 1961-06-15 |
| CA728283A (en) | 1966-02-15 |
| BE588951A (nl) | 1960-09-23 |