GB359852A - Improvements in or relating to impulse transmitters for use in telephone or like systems - Google Patents
Improvements in or relating to impulse transmitters for use in telephone or like systemsInfo
- Publication number
- GB359852A GB359852A GB646931A GB646931A GB359852A GB 359852 A GB359852 A GB 359852A GB 646931 A GB646931 A GB 646931A GB 646931 A GB646931 A GB 646931A GB 359852 A GB359852 A GB 359852A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impulse
- dial
- normal speed
- telephone
- relating
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/32—Locking setting devices during transmission to prevent interference by user
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Keying Circuit Devices (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE579407T | 1930-07-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB359852A true GB359852A (en) | 1931-10-29 |
Family
ID=34584667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB646931A Expired GB359852A (en) | 1930-07-08 | 1931-03-02 | Improvements in or relating to impulse transmitters for use in telephone or like systems |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE579407C (no) |
FR (1) | FR713878A (no) |
GB (1) | GB359852A (no) |
NL (1) | NL31271C (no) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1007815B (de) * | 1951-12-26 | 1957-05-09 | Lorenz C Ag | Nummernschalter fuer Fernsprechgeraete mit einem von der Ablaufspindel gesteuerten Traegheitskontakt |
-
0
- NL NL31271D patent/NL31271C/xx active
-
1930
- 1930-07-08 DE DE1930579407D patent/DE579407C/de not_active Expired
-
1931
- 1931-03-02 GB GB646931A patent/GB359852A/en not_active Expired
- 1931-03-26 FR FR713878D patent/FR713878A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE579407C (de) | 1933-06-26 |
NL31271C (no) | |
FR713878A (fr) | 1931-11-04 |
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