NL237529A - - Google Patents
Info
- Publication number
- NL237529A NL237529A NL237529DA NL237529A NL 237529 A NL237529 A NL 237529A NL 237529D A NL237529D A NL 237529DA NL 237529 A NL237529 A NL 237529A
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
-
- 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)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL237529 | 1959-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL237529A true NL237529A (en:Method) |
Family
ID=19751634
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL98373D NL98373C (en:Method) | 1959-03-25 | ||
| NL237529D NL237529A (en:Method) | 1959-03-25 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL98373D NL98373C (en:Method) | 1959-03-25 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3173064A (en:Method) |
| JP (1) | JPS4012801B1 (en:Method) |
| NL (2) | NL237529A (en:Method) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1909212A (en) * | 1930-03-11 | 1933-05-16 | Signal Engineering & Mfg Co | Selective control circuit for alarm systems |
| US2512639A (en) * | 1944-01-05 | 1950-06-27 | Int Standard Electric Corp | Control or signaling system |
-
0
- NL NL98373D patent/NL98373C/xx active
- NL NL237529D patent/NL237529A/xx unknown
-
1959
- 1959-06-24 JP JP2022159A patent/JPS4012801B1/ja active Pending
-
1960
- 1960-03-23 US US17055A patent/US3173064A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3173064A (en) | 1965-03-09 |
| NL98373C (en:Method) | |
| JPS4012801B1 (en:Method) | 1965-06-22 |