GB381044A - Improvements in spring driving means for impulse transmitters of the dial type for automatic telephone systems and the like - Google Patents
Improvements in spring driving means for impulse transmitters of the dial type for automatic telephone systems and the likeInfo
- Publication number
- GB381044A GB381044A GB71232A GB71232A GB381044A GB 381044 A GB381044 A GB 381044A GB 71232 A GB71232 A GB 71232A GB 71232 A GB71232 A GB 71232A GB 381044 A GB381044 A GB 381044A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pinion
- impulse
- shaft
- wheel
- dial
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Transmission Devices (AREA)
Abstract
381,044. Impulse transmitters. RICHTER, M. B., 7, Amaliegade, Cope.nhagen. Jan. 9, 1932, No. 712. [Class 40 (iv).] In a governor-controlled transmitter of the dial type, decreasing torque on the shaft during the return movement due to decrease of spring- tension is compensated by a driving gear of continuously variable ratio. The shaft b carries a spiral pinion f gearing with a similar pinion g rotatably mounted on a shaft h to which is adjustably secured a drum k carrying the driving spring j the ends of which are secured to the pinion g and drum k respectively. The spirals are preferably Archimedian. The parts are shown in Fig. 2 in a position just before reaching normal, the ratio of the effective radius of pinion f to that of pinion g being substantially at a maximum. The governor (not shown) is driven by a gear wheel q loose on shaft band rotated by the engagement of pawl p with ratchet wheel o on the dial during the return movement. The impulse springs n are actuated by a projection on one of them engaging the impulse wheel u secured to gear-wheel q, and when the dial reaches normal, a finger v on the shaft b engages a bell-crank x1, x2 which holds the impulse springs in contact and locks the impulse wheel u.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB71232A GB381044A (en) | 1932-01-09 | 1932-01-09 | Improvements in spring driving means for impulse transmitters of the dial type for automatic telephone systems and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB71232A GB381044A (en) | 1932-01-09 | 1932-01-09 | Improvements in spring driving means for impulse transmitters of the dial type for automatic telephone systems and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB381044A true GB381044A (en) | 1932-09-29 |
Family
ID=9709217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB71232A Expired GB381044A (en) | 1932-01-09 | 1932-01-09 | Improvements in spring driving means for impulse transmitters of the dial type for automatic telephone systems and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB381044A (en) |
-
1932
- 1932-01-09 GB GB71232A patent/GB381044A/en not_active Expired
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