GB414301A - Improvements in or relating to impulse transmitting arrangements for use in telephone systems - Google Patents
Improvements in or relating to impulse transmitting arrangements for use in telephone systemsInfo
- Publication number
- GB414301A GB414301A GB325634A GB325634A GB414301A GB 414301 A GB414301 A GB 414301A GB 325634 A GB325634 A GB 325634A GB 325634 A GB325634 A GB 325634A GB 414301 A GB414301 A GB 414301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- depressed
- over
- row
- keyboard
- 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
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
414,301. Impulse transmitters. GIORDANO, P., 16, Via Riccardo Wagner, Alessandria, Italy. Jan. 31, 1934, No. 3256. [Class 40 (iv).] In an impulse transmitter of the keyboard type comprising six rows of ten keys, each key can control the transmission of either one digit of a six-digit number in accordance with its position on the keyboard or the whole six digits of an arbitrarily-selected number, the choice between these two functions being effected by operating one or other of two auxiliary keys. Each key 30, Fig. 5, has pivoted to it a terminal block carrying seventeen terminals 28 arranged in two rows as shown in Figs. 3, 10, six of the terminals I-VI of one row being jumpered to the ten 1-0 of the other row in accordance with the six digits of a particular subscriber's number (286004) whilst the remaining terminal his jumpered to that one of the row 1-0 which corresponds to the position of the key on the keyboard (as shown, the ninth in the first row). When a key 30 is depressed the terminal block is moved forward so that the terminals make bridging connections between a series of ten digit wires 1-0 multipled over the whole keyboard and two groups of sequence wires I-VI and h--w. A depressed key is locked by a locking bar 32 engaging a projection 35 and is released by a common release key Z, the arrangement being such that only one key in a rod can be depressed at the same time. When it is desired to call the six-digit number allotted to a single key, auxiliary key N is depressed completing a circuit at contact H for connecting transformer T over leads 50, 51 to commutator magnet U which advances its wipers s, t, to a start position.. Wiper s is connected up over contact N<1> of key N and completes a circuit over lead 53 for relay 39 which operates its mechanically-locking armature 11 to start a motor M driving a plate A which carries on one side a stepped segment L and commutator segments i<1>, i<11>, and on the other side magnets E, F. At each rotation of plate A a pin P operates contacts D to advance commutator wipers s, t, one step, and in each of the positions I-VI of wipers, magnet E operates over segments i<1>, L, one of the brushes K, and a jumpered connection at the operated terminal block, for a varying fraction of a complete revolution of A depending on which of the brushes K is connected up. Magnet E closes a higher-voltage circuit for magnet F which tilts a pivoted arm V causing a projection 25 to engage a number of a series of spaced springs 22 to transmit a corresponding number of impulses over the line. At the same time the movement of the head 20 of the magnet core 19 permits springs 23, 24 to close to shortcircuit the telephone instruments. After the last digit, wiper s completes a circuit over lead 54 for winding 13 which releases the locked armature 11. The operation is similar when auxiliary key C is depressed with the exception that wiper t is connected up and the six digits transmitted are determined by jumperings such as h-9 closed at six keys one in each row of the keyboard. Instead of the springs 22, a projection 40 on arm V may engage the fingerholes of an ordinary dial, the commutators s, t, having in this case neutral positions between each two working positions in order to provide time for the dial to return to normal between digits. The multiple-wires 1-0, I-VI, h-w, are in the form of helices of small diameter which provide resilience.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB325634A GB414301A (en) | 1934-01-31 | 1934-01-31 | Improvements in or relating to impulse transmitting arrangements for use in telephone systems |
BE401222D BE401222A (en) | 1934-01-31 | 1934-02-01 | |
FR768075D FR768075A (en) | 1934-01-31 | 1934-02-02 | Method and calling device for automatic telephone systems with selectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB325634A GB414301A (en) | 1934-01-31 | 1934-01-31 | Improvements in or relating to impulse transmitting arrangements for use in telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB414301A true GB414301A (en) | 1934-08-02 |
Family
ID=9754890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB325634A Expired GB414301A (en) | 1934-01-31 | 1934-01-31 | Improvements in or relating to impulse transmitting arrangements for use in telephone systems |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE401222A (en) |
FR (1) | FR768075A (en) |
GB (1) | GB414301A (en) |
-
1934
- 1934-01-31 GB GB325634A patent/GB414301A/en not_active Expired
- 1934-02-01 BE BE401222D patent/BE401222A/xx unknown
- 1934-02-02 FR FR768075D patent/FR768075A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE401222A (en) | 1934-03-31 |
FR768075A (en) | 1934-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2619546A (en) | Party line identification system | |
GB414301A (en) | Improvements in or relating to impulse transmitting arrangements for use in telephone systems | |
US2371311A (en) | Station selection system | |
US3062921A (en) | Preset call transmitter | |
US2172579A (en) | Key sender | |
US3551605A (en) | Telephone call handling system with number display | |
US2557392A (en) | Combined telephone and telegraph system | |
US2433347A (en) | Telecommunication system | |
US3286040A (en) | Call transmitter employing a code bearing medium | |
US2250101A (en) | Telephone system | |
US1425728A (en) | Telephone-exchange system | |
US1166620A (en) | Telephone calling mechanism and system. | |
US1445235A (en) | Impulse-transmitting device | |
US1849088A (en) | Telephone system | |
US3301968A (en) | Telephone signaling device | |
US1148800A (en) | Current-impulse transmitter. | |
GB451864A (en) | Improvements in telephone or like systems and impulse senders for use therein | |
US1133373A (en) | Subscriber-controlled switching apparatus for telephone-exchange systems. | |
US1179741A (en) | Automatic telephone system. | |
US2597898A (en) | Automatic impulse sender | |
US3488449A (en) | Code transmitter | |
US1173564A (en) | Operator's calling device. | |
US2574532A (en) | Reverting call circuit | |
GB442335A (en) | Improvements in or relating to automatic switches of the step-by-step type such as are used in automatic telephone systems | |
US1137200A (en) | Common-battery automatic telephone system. |