GB708451A - Telephone key and like switches - Google Patents
Telephone key and like switchesInfo
- Publication number
- GB708451A GB708451A GB23484/51A GB2348451A GB708451A GB 708451 A GB708451 A GB 708451A GB 23484/51 A GB23484/51 A GB 23484/51A GB 2348451 A GB2348451 A GB 2348451A GB 708451 A GB708451 A GB 708451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- springs
- moved
- contact springs
- operative position
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
- H01H1/28—Assembly of three or more contact-supporting spring blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B2700/00—Combustion apparatus for solid fuel
- F23B2700/011—Combustion apparatus for solid fuel with fuel shaft for steam boilers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20636—Detents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20924—Controller checks
Landscapes
- Mechanical Control Devices (AREA)
- Telephone Set Structure (AREA)
- Push-Button Switches (AREA)
Abstract
708,451. Switches held set and freed mechanically. AUTOMATIC ELECTRIC LABORATORIES Inc. Oct. 9, 1951 [Jan. 16, 1951], No. 23484/51 Class 38(5) A telephone key switch with a key 4 which may be moved in either direction from a central position to operate contact springs has a pair of.cantilever detent springs 10 adapted to engage notches 7 in the key to prevent the key passing the central position when it is 'flicked' back to that position from an operative position. On the other hand the key may be moved directly from one operative position to the other if it is moved slowly. The detent springs 10 normally lie outside the path of the notches 7 but they are weighted at 11 so that they move beyond their normal position on a sudden movement of the key. The key carries two rollers 5 which operate contact springs 8, 18 and, through them, other contact springs. In an operative position the roller has passed beyond a dead-centre position relative to the spring 8 or 18 and is thereby held.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US206282A US2672765A (en) | 1951-01-16 | 1951-01-16 | Lever key |
Publications (1)
Publication Number | Publication Date |
---|---|
GB708451A true GB708451A (en) | 1954-05-05 |
Family
ID=22765708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23484/51A Expired GB708451A (en) | 1951-01-16 | 1951-10-09 | Telephone key and like switches |
Country Status (4)
Country | Link |
---|---|
US (1) | US2672765A (en) |
BE (1) | BE506996A (en) |
FR (1) | FR1044080A (en) |
GB (1) | GB708451A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2875639A (en) * | 1954-01-15 | 1959-03-03 | Bell Telephone Labor Inc | Switching device mechanism |
DE1153033B (en) * | 1955-10-24 | 1963-08-22 | Adlerwerke Kleyer Ag H | Device on accounting machines for the automatic adjustment of writing sheets to be introduced on the front side of the platen to the line to be written by means of conveyor rollers |
US2943158A (en) * | 1958-05-22 | 1960-06-28 | Northern Electric Co | Two way lever type telephone key |
US3076063A (en) * | 1960-03-24 | 1963-01-29 | Gen Dynamics Corp | Switching keys with cam follower means |
US3317682A (en) * | 1965-10-14 | 1967-05-02 | Automatic Elect Lab | Switching device with sensor for proximity switch |
US3543602A (en) * | 1968-11-25 | 1970-12-01 | Robert D Riedle | Lever positioning apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1508798A (en) * | 1920-08-23 | 1924-09-16 | Kellogg Switchboard & Supply | Key |
US2427187A (en) * | 1945-05-10 | 1947-09-09 | Kellogg Switchboard & Supply | Listening and ringing key for telephone switchboards |
-
0
- BE BE506996D patent/BE506996A/xx unknown
-
1951
- 1951-01-16 US US206282A patent/US2672765A/en not_active Expired - Lifetime
- 1951-10-09 GB GB23484/51A patent/GB708451A/en not_active Expired
- 1951-10-23 FR FR1044080D patent/FR1044080A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1044080A (en) | 1953-11-13 |
US2672765A (en) | 1954-03-23 |
BE506996A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1331246A (en) | Microwave heating apparatus | |
GB793155A (en) | Improvements in or relating to electric retractive switches | |
GB708451A (en) | Telephone key and like switches | |
GB1133332A (en) | Improvements relating to snap-action mechanisms | |
GB677376A (en) | Improvements in locking devices | |
GB618226A (en) | Improvements in and relating to electric snap-action switches | |
GB765795A (en) | Push-button electric switches | |
GB1190037A (en) | Electric Switching Apparatus | |
GB696816A (en) | Improvements in or relating to snap-action electric switches | |
GB708191A (en) | Improvements relating to spring-closed electric circuit-breakers | |
GB721690A (en) | Improvements relating to electric changeover switches | |
GB515180A (en) | Improvements in key switching devices suitable for use in telephone systems | |
GB1094586A (en) | Improvements in or relating to electrical snap-action switches | |
GB746642A (en) | Rotary electric snap switch | |
GB867068A (en) | Automatic circuit-breaking device | |
GB804295A (en) | Improvements in or relating to contact spring pile-ups | |
GB641296A (en) | Improvements relating to electric switches | |
GB1078905A (en) | A snap-action operating system in an electric switch | |
GB1030054A (en) | Improvements relating to electric switches | |
GB720636A (en) | Rotary electric switches | |
GB849945A (en) | Improvements in magnetically-controlled electric switching apparatus | |
GB666668A (en) | Improvements relating to snap-action electric switches | |
GB800668A (en) | Improvements in or relating to rotary electric switches | |
GB748314A (en) | Improved multi-way electric tumbler switch | |
GB767008A (en) | Improvements in or relating to dolly-actuated electric switches for a.c. circuits |