GB177512A - Improvements in or relating to switching mechanism for use in telephone or like systems - Google Patents
Improvements in or relating to switching mechanism for use in telephone or like systemsInfo
- Publication number
- GB177512A GB177512A GB7842/22A GB784222A GB177512A GB 177512 A GB177512 A GB 177512A GB 7842/22 A GB7842/22 A GB 7842/22A GB 784222 A GB784222 A GB 784222A GB 177512 A GB177512 A GB 177512A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- vertical
- detent
- rotary
- teeth
- 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
- 238000005266 casting Methods 0.000 abstract 1
- 239000010960 cold rolled steel Substances 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H67/00—Electrically-operated selector switches
- H01H67/02—Multi-position wiper switches
- H01H67/14—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
- H01H67/16—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches
Landscapes
- Telephone Set Structure (AREA)
Abstract
177,512. Automatic Telephone Manufacturing Co., Ltd., (Assignees of Erickson, J.). March 28, 1921, [Convention date]. Selectors.-In an automatic switch of the Strowger type, a bracket member (shown separately in Fig. 3) formed of cold rolled steel, carries the off-normal springs 135, the interrupter springs 120 of the rotary magnet and such other parts as the lug 140 carrying the rotary-pawl guide 119, the stationary detent 125 and the stop 138 for the vertical pawl, and is arranged to act as a reinforcement to the main casting of the switch. The vertical ratchet teeth 110, Fig. 2, are provided at one side with a second set of teeth 111 offset from the first. These additional teeth are engaged by the vertical detent 108 during the vertical movement of the switch, whilst at the first rotary step they are moved clear of the detent, thus avoiding the necessity for the slight lifting of the switch shaft which usually accompanies this step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US177512XA | 1921-03-28 | 1921-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB177512A true GB177512A (en) | 1923-03-15 |
Family
ID=21784337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7842/22A Expired GB177512A (en) | 1921-03-28 | 1922-03-17 | Improvements in or relating to switching mechanism for use in telephone or like systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB177512A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6033525A (en) * | 1997-10-30 | 2000-03-07 | Moffett; Robert Harvey | Modified cationic starch composition for removing particles from aqueous dispersions |
-
1922
- 1922-03-17 GB GB7842/22A patent/GB177512A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6033525A (en) * | 1997-10-30 | 2000-03-07 | Moffett; Robert Harvey | Modified cationic starch composition for removing particles from aqueous dispersions |
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