US3614330A - Three dimensional matrix for performing switching operations - Google Patents
Three dimensional matrix for performing switching operations Download PDFInfo
- Publication number
- US3614330A US3614330A US706544A US3614330DA US3614330A US 3614330 A US3614330 A US 3614330A US 706544 A US706544 A US 706544A US 3614330D A US3614330D A US 3614330DA US 3614330 A US3614330 A US 3614330A
- Authority
- US
- United States
- Prior art keywords
- bistable
- group
- frames
- junction
- input
- 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 - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H67/00—Electrically-operated selector switches
- H01H67/22—Switches without multi-position wipers
- H01H67/26—Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch
Definitions
- the switching device inplurality of ement relatput frames which are also actively connecting inrcuits.
- the device also includes a bistable junction rods mounted for transverse mov tive to the bistable input and ou tuated in response to the input signal.
- the bistable input and output frames and the junction rods operate circuits associated with the bistable frames for selec coming and outgoing lines connected to the ci e, both of ATIONS 179/18 GE, 200/177, 335/112 H04g 3/42, H01h 67/14 179/l8.74, 22; 200/177; 335/1 12 Roger Marcel Chaveneaud Levallois-Perret; Georges J anoska, Courbevoi France [21] Appl. No. 706,544
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Structure Of Telephone Exchanges (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A switching device for performing switching operations between a first group of incoming lines and a second group of outgoing lines in response to an input signal representing in a selected code the identification of an incoming and outgoing line is provided. The switching device includes a plurality of bistable input frames and a plurality of bistable output frames which are actuated in response to a coded input signal. The device also includes a plurality of bistable junction rods mounted for transverse movement relative to the bistable input and output frames which are also actuated in response to the input signal. The bistable input and output frames and the junction rods operate circuits associated with the bistable frames for selectively connecting incoming and outgoing lines connected to the circuits.
Description
g switching lines and a f outgoing lines in response to an input signal an incomprovided. The switching device inplurality of ement relatput frames which are also actively connecting inrcuits.
[5 6] References Cited UNITED STATES PATENTS 2,901,547 8/1959 Miloche............ 3,088,999 5/1963 Brunberg et a1. 3,478,285 11/1969 Haines et a1. Primary Examinerl(athleen H. Claffy Assistant Examiner-William A. Helvestine AttorneyFinnegan, Henderson & Farabow ABSTRACT: A switching device for performin operations between a first group of incoming second group 0 representing in a selected code the identification of ing and outgoing line is cludes a plurality of bistable input frames and a plurality of bistable output frames which are actuated in response to a coded input signal. The device also includes a bistable junction rods mounted for transverse mov tive to the bistable input and ou tuated in response to the input signal. The bistable input and output frames and the junction rods operate circuits associated with the bistable frames for selec coming and outgoing lines connected to the ci e, both of ATIONS 179/18 GE, 200/177, 335/112 H04g 3/42, H01h 67/14 179/l8.74, 22; 200/177; 335/1 12 Roger Marcel Chaveneaud Levallois-Perret; Georges J anoska, Courbevoi France [21] Appl. No. 706,544
Feb. 19, 1968 [45] Patented Oct. 19, I971 Societe A Responsabilite Limitee: Societe Lampy DEtudes et de Recherches S.O.L.E.R. Courbevoie, France Feb. 23, 1967 France PV 96,300
[54] THREE DIMENSIONAL MATRIX F PERFORMING SWITCHING OPER 13 Claims, 27 Drawing Figs.
[52] U.S. Cl........
[50] Field of United States Patent [72] Inventors [22] Filed [73] Assignee [32] Priority w M yaw/I U m F w r 0 s v I! A wi l m In J B a a I PATENTEBum 19 Ian sum 02 or 26 3. 6 1 4.3
a N k 1 Wm M PATENTIEUHET 1 m sum 05 0F 26 3,614,330
W m .ey wm/wyumimm PATENTEDncr 19 1911 sum 0501 26 3514330 000up 0.0 7 2 J 0.1 0.2 0.3 12. 0000 0001 0010 0011 001 0000 1100 6 7 7 5 9.1 9.2 0101 0110 0111 a: 0001 0101 1001 v 9.0 70 17 2 6 I4 1001 10:10 1011 0010 0110 1010 1110 12 10 r 3 7 11 15 1100 1110 1111 0011 0111 1011 1111 0 0 0 0 0 0 0 0 i 0000 0000. 0000 0000 Am 0000 0000 0000 0000 1 1 1 1 1 1 1 1 7 i v V y I 1 1 v 0.3 1 8 3 0.2 0.1 0.0 72 0000 0001 0010 0011 M4 0000 1100 5 6 7 1 5 9.1- 9.0 0101 0110 0111 h 0001 0101 1001 9.0 10 11 5 2 0 10 14- 1001 1010 1011 m: 0010 0110 1010 1110 12 I4 15 5 7 71 15 1100 1110 1111 n; 0011 0111 1011 1111 0 4 4 0 0 0 4 0 0100 0100 0100 0100 0 0100 0100 0100 0100 5 5 5 5 5 6' 5 .5 0101 0101 .0101 0101 0101 0101 0101 0101 v 0 0 0 0 0 0 0 0 0110 0110 0110 0110 40: 0110 0110 0110 0110 7 7 7 7 7 7 7 7 0111 0111 0111 0111 0111 0111 0111 0111 .11 4 11 x i; 11 .L .1
. E S 5 a 5 S E E Pmmnnumwm 7 W [M 26 3,614,330
1 GROUP 2" GROUP OCCUPIED- T 2"0 0.0 7 2 3 0.1 0.2 v 0.5 72
9.0 10 11 2 6 10 14 CB zfld CB 1 'G 1001 1010 1011 0010 0110 1010 1110 f 12 10 15 5 7 11 15 1100 1110 1111 0011 0111 1011 1111 0 O O O 0 0 0 0 '0000 0000 0000 0000 g 0000 0000 0000 0000 [CA 2 2 2 2 2 2 2 2 0010 0010 0010 0010 0010 0010 0010 0010 5 5 5 5 5 5 5 5 k 0011 0011 0011 0011 V 0011 0011 0011 0011 V H 1 1 g 5 1 a H 1 0 3 1 2 3 0. 2 O 1 0 0 12 0000 0001- 0010 0011 foo 0000 1100 5 6 7 1 .5 91 B 0101 0110 0111 074 0001 0101 1001 9.2 10 11 2 6 10 14 C8 2M6 H v 1001 1010 1011 0010 0110 1010 1110 5 C81 6% 12 10 15 3 7 11 15 1100 1110 1111 WA 0011 0111 -1011 1111 K 0 0 0 4 0 0 4 4 0100 0100 0100 0100 m 0100 0100 0100 0100 PAIENTEDum 191911 sum 09 [1F 26 FIG. 9
1 GROUP 2"' GROUP r 0.0 1 2 3 0.! 0.2 0.1 72 "d CB 1 G 0000 0001 0010 0011 0000 11 1 G 0 O O O O O O O h l l o Q g g g g g g g o o o C8151 G 0.3 1 2 3 0.2 0.1 0.0 12 CH Ends 0000 0001 0010 0011 0000 1100 r 5 5 7 1 5 9.1 9.0 a J 0101 0110 0111 01 0001 0101 1001 01.00 0100 0100 0100 7004 0100 0100 0100 0100 Q 5 5 5 5 5 5 5 5 CA 0101 0101 0101 0101 0101 0101 0101 0101 6 0 5 5 5 5 6 6 0110 0110 0110 0110 via 0110 0110 0 10 0110 1 7 7 7 7 7 7 7 7 0111 0111 0111 0111 0111 0111 0111 0111 i o L o l 2 3 I I E E t I a b Q Q PAIENIEBUEI 191911 I 131.614.3110
' sum 1001 20 FIG. 9
1 GROUP 2" GROUP OCCUPlE D f 1 2 5 0.1 0.2 0.; 12 C31 G 0000 0001 0010 0011 0 0000 1100 Z 1001 1010 1011 0010 0110 1010 1110 12 10 15 5 7 11 15 1100 1110 1111 11 0011 0111 1011 1111 CA 0 0 o 0 0 0 0 0 0000 0000 0000 0000 [A 0000 0000 0000 0000 I f CA 1 1 O 8 2 Q Q! o I; 2 a a 2 2 2 0.3 1 2 3 0.? 0.1 0.0 12 S1 nd CB1 G 0000 0001 0010 0011 I 004 0000 1100 6 1100 1110 1111 "4 0011 0111 1011 1111 CA K 4 4 4 4 4 4 4 4 0100 0100 0100 0100 E4 0100 0100 0100 0100 5 5 5 5 5 5 5 5 A 01601 01601 0121 0121 0121 0121 0121 0121 0110 0110 0110 0110 f m 0110 0110 0110 0110 11 1 I g Q 2 E g S 2 I I; S 8 0 .2. I II PATENTEUHU 191971 3,614,330
sum 110F26 FIG. 9
- 51 nd OCCUHED OCCUPED Lwf f 3 0. .2 .J 2 1 2 1 0 0 1 CBzndG t 0000 0001 0010 0011 "T01 0000 1100 1 C81 G-\ 5 6 7 1 5 9.1 9.2
- B 0101 0110 0111 JW 0001 0101 1001 2 2 2 2 2 2 2 2 CA CA 1 0010 0010 0010 0010 E 0010 0010 0010 0010 f I 3 3 3 3 5 3 3 5 3 E E [g [5] 8 I Q o o o o S 2 r 0.3 1 2 3 0.2 0.1 0.0 12 nd C82 6 0000 0001 0010 0011 J07, 0000 100 S G 5 6 7 1 5 9.1 9.0 0101 0110 0111 ra 0001 0107 5 5' 5 5 5 5 5 5 I 0101 0101 0101 0101 01: 0101 0101 0101 0101 1 6 6' 6 6 6 6 6 6 CA 0110 0110 0110 0110 4 0110 0110 0110 0110 1 V 1 3 S 2 E 8 S 8 I g g 8 Q I I: T- I:
PATENTE D SHEET 3m 26 3,614,330
PATENTEDum 19 197i SHEEI 13 OF 26 F /6. Wm OPERATION IN FIRST HALF-PERIOD FOR CONNECTION A -B I llfll HJQ IIFII .P l
SHEET 15 [IF 26 FIG. I0 0 OPERATION IN F IRST HALF-PERIOD FOR CONNECTION A S AFTER CONNECTION A -B COMPLETED PAIENTEUnm 1 9 l9?! T Z Gr PATENTED BI 19 ISTI FIG/0 b OPERATION IN SECOND HALF-PERIOD FOR CONNECTION A B AFTER CONNECTION A 43 COMPLETED PATENTEDUCT 19 Ian SHEET 18 [1F 26 FIG. m OPERATION m SECOND HALF-PERIOD FOR CONNECTION A -B I FIE.
llplllv kllllll lnflllllr-l llhlllllrlll PATENTEBUCT 19 Ian OPERATION IN FIRST HALF CONNECTION 0 "E f lllllFl llrllll INIL
Claims (13)
1. A switching device for performing switching operations between a first group of incoming lines and a second group of outgoing lines in response to an input signal representing in a selected code the identification of an incoming and outgoing line, which comprises: a plurality of bistable input frames mounted for movement between first and second positions; a first plurality of spaced contacts operatively associated with each of said bistable input frames, each of said contacts being connected to one of the incoming lines; means responsive to the input signal for selectively moving one of said bistable input frames from its first position to its second position; a plurality of bistable output frames mounted for movement between first and second positions; a second plurality of spaced contacts operatively associated with each of said bistable output frames, each of said contacts being connected to one of the outgoing lines; means responsive to the input signal for selectively moving one of said bistable output frames from its first position to its second position; a plurality of bistable junction rods mounted for transverse movement relative to said bistable input and output frames between operative and inoperative positions; and means responsive to the input signal for selectively moving one of said bistable junction rods from its inoperative position to its operative position to connect a contact associated with the selected bistable input frame moved to its second position to a contact associated with the selected bistable output frame moved to its second position.
2. The switching device of claim 1, which includes: a first support for mounting said first plurality of spaced contacts adjacent to said bistable input frames, said first support having a plurality of contact blades projecting therefrom and normally located out of engagement with said spaced contacts; a second support for mounting said second plurality of spaced contacts adjacent to said bistable output frames, said second support having a plurality of contact blades projecting therefrom and normally located out of engagement with said spaced contacts; and means actuated by movement of one of said bistable input frames and one of said bistable output frames to their second positions and by movement of one of said bistable junction rods to its operative position for actuating one of the contact blades on said first support and one of the contact blades on said second support to move those contact blades into engagement with the corresponding spaced contacts.
3. The switching device of claim 2, wherein the means for actuating the contact blades includes: a first set of balls mounted on said bistable input frames, one of said balls being moved into operating relationship with one of the contact blades of said first support upon movement of its bistable input frame to its second position and movement of one of said junction rods to its operative position; and a second set of balls mounted on sAid bistable output frames, one of said balls being moved into operating relationship with one of the contact blades of said second support upon movement of its bistable output frame to its second position and movement of that junction rod to its operative position.
4. A switching device for selectively operating a plurality of circuits, which comprises: a first card for supporting the circuits, said card having a plurality of elastic blades projecting therefrom for making electrical connections to the circuits located on said card when said blades are moved into contact with the circuits; a plurality of bistable input frames mounted for transverse movement relative to said card from inoperative positions to operative positions, each of said bistable input frames having a plurality of notches formed therein; a first set of balls located in said notches formed in said bistable input frames; a plurality of selection rods mounted for transverse movement relative to said bistable input frames from first positions to second positions, each of said selection rods having a first set of slots formed therein corresponding in number to the bistable input frames, said slots being located adjacent to said notches of said bistable input frames when said selection rods are located in their first positions; means for selectively moving one of said bistable input frames from its inoperative position to its operative position to move the balls located in the notches formed in that bistable input frame into the slots of the selection rods located adjacent to those notches; and means for selectively moving one of said selection rods from its first position to its second position to move the ball located in one of its slots into an operating relationship with one of said blades to bend that blade into contact with the corresponding circuit on said card.
5. The switching device of claim 4, which includes: a plurality of elastic tongues located adjacent to said blades, each of said tongues being actuated by movement of one of said balls into operating relationship with one of said blades for engaging the blade to urge it into contact with the corresponding circuit on said card.
6. The switching device of claim 4, which includes: a plurality of bistable output frames mounted for transverse movement relative to said card from inoperative positions to operative positions, each of said bistable output frames having a plurality of notches formed therein; each of said selection rods having a second set of slots formed therein corresponding in number to the number of bistable output frames, said slots normally being located adjacent to said notches of the bistable output frames; a second set of balls located in the notches formed in said bistable output frames; a second card having a plurality of circuits mounted thereon and a plurality of elastic blades projecting therefrom for making electrical connections to the circuits located on said second card when said blades are moved into contact with the circuits; and means for selectively moving one of said bistable output frames from its inoperative position to its operative position to move the balls of said second set located in the notches formed in that bistable output frame into the slots formed in said selection rods and located adjacent to those notches, one of the balls being moved into an operating relationship with one of said blades upon movement of one of said selection rods to its operative position to bend that blade into contact with the corresponding circuit on said second card.
7. The switching device of claim 6, which includes: a plurality of elastic tongues located adjacent to the blades projecting from said second card, each of said tongues being actuated by movement of one of the second set of balls into operating relationship of one of said blades for bending said blades into contact with the corresponding circuit of said second card.
8. A switching device for performing switching operations between a first group of incoming lines and a second group of outgoing lines in response to an input signal representing in a selected code the identification of an incoming and outgoing line, which comprises: a plurality of bistable input frames mounted for movement between first and second positions; a first plurality of spaced contacts operatively associated with each of said bistable input frames, each of said contacts being connected to one of the incoming lines; a plurality of bistable output frames including first and second groups of bistable output frames, each of said output frames being mounted for movement between first and second positions; a second plurality of spaced contacts including (1) a first group of contacts operatively associated with each of the bistable output frames of said first group of bistable output frames, each of said contacts being connected to one of the outgoing lines and (2) a second group of contacts operatively associated with each of the bistable output frames of said second group of bistable output frames, each of said contacts being connected to one of the outgoing lines; a plurality of bistable junction rods including first and second groups of bistable junction rods mounted for transverse movement relative to said bistable input and output frames between operative and inoperative positions; means responsive to the input signal for selectively moving a bistable input frame having a contact associated with the incoming line identified by the input signal from its first position to its second position; means responsive to the input signal for selectively moving a bistable output frame of each group of bistable output frames having a contact associated with the outgoing line identified by the input signal from its first position to its second position; means responsive to the input signal for selectively moving a priority bistable junction rod of said first group of bistable junction rods from its inoperative position to its operative position to connect the contact associated with the selected bistable input frame moved to its second position to the contact associated with the selected bistable output frame of said first group of bistable output frames moved to its second position; and means responsive to the input signal for selecting and moving an alternate bistable junction rod of said second group of bistable junction rods from its inoperative position to its operative position in the event that said priority bistable junction rod of said first group is occupied to connect the contact associated with the selected bistable input frame moved to its second position to the contact associated with the selected bistable output frame of said second group of bistable output frames moved to its second position.
9. The switching device of claim 8, which includes: switching means actuated by movement of one of said bistable junction rods of said first group of bistable junction rods to its operative position and by movement of one of said bistable output frames of said second group of bistable output frames to its second position for controlling the selection of the alternate bistable junction rod of said second group of bistable junction rods when said priority bistable junction rod is occupied.
10. The switching device of claim 9, wherein said switching means includes: a switch actuated by movement of one of said bistable junction rods of said second group of bistable junction rods to its operative position for controlling the selection of another alternate bistable junction rod of said second group of bistable junction rods when said priority bistable junction rod and a first alternate bistable junction rod are occupied.
11. A switching device for performing switching operations between a first group of incoming lines and a second group of outgoing lines in response to an input signal representing in a selected code the identification of an incomIng and outgoing line which comprises: a plurality of bistable input frames mounted for movement between first and second positions; a first plurality of spaced contacts operatively associated with each of said bistable input frames, said contacts being arranged in first and second levels and each of said contacts being connected to one of the incoming lines; a plurality of bistable output frames including first and second groups of bistable output frames, each of said output frames being mounted for movement between first and second positions; a second plurality of spaced contacts including (1) a first group of contacts operatively associated with each of the bistable output frames of said first group of bistable output frames, said contacts being arranged in said first and second levels and both levels including contacts connected to each of the outgoing lines, and (2) a second group of contacts operatively associated with each of the bistable output frames of said second group of bistable output frames, said contacts being arranged in said first and second levels and both levels including contacts connected to each of the outgoing lines; a plurality of bistable junction rods including (1) first and second groups of bistable junction rods located in said first level and mounted for transverse movement relative to said bistable input and output frames between operative and inoperative positions, and (2) third and fourth groups of bistable junction rods located in said second level and mounted for transverse movement relative to said bistable input and output frames between operative and inoperative positions; means responsive to the input signal for selectively moving a bistable input frame having a contact associated with the incoming line identified by the input signal from its first position to its second position; means responsive to the input signal for selectively moving a bistable output frame of each group of bistable output frames having a contact associated with the outgoing line identified by the input signal from its first position to its second position; means responsive to the input signal for selecting and moving a priority bistable junction rod of said first group or said third group of junction rods from its inoperative position to its operative position to connect the contact associated with the selected bistable input frame to the contact associated with the selected bistable output frame of said first group of said bistable frames; and means responsive to the input signal for selecting and moving an alternate bistable junction rod of said second group or said fourth group of bistable junction rods from its inoperative position to its operative position in the event that said priority bistable junction rod of said first group of said third group is occupied to connect the contact associated with the selected bistable input frame to the contact associated with the selected bistable output frame of said second group of bistable output frames.
12. The switching device of claim 11, which includes: switching means actuated by movement of a priority bistable junction rod of said first group or said third group of bistable junction rods to its operative position and by movement of one of said bistable output frames of said second group of bistable output frames to its second position for controlling the selection of the alternate bistable junction rod of said second group or said fourth group of bistable junction rods when said priority bistable junction rod is occupied.
13. The switching device of claim 12, wherein said switching means includes: a switch actuated by movement of the alternate bistable junction rod of said second group or said fourth group of bistable junction rods to its operative position for controlling the selection of another alternate bistable junction rod of said second group or said fourth group of bistable junction rods when said priority bistable junction rod and a first alterNate bistable junction rod are occupied.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR96300A FR1522302A (en) | 1967-02-23 | 1967-02-23 | Electro-mechanical switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3614330A true US3614330A (en) | 1971-10-19 |
Family
ID=8625849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US706544A Expired - Lifetime US3614330A (en) | 1967-02-23 | 1968-02-19 | Three dimensional matrix for performing switching operations |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3614330A (en) |
| DE (1) | DE1638129A1 (en) |
| FR (1) | FR1522302A (en) |
| GB (1) | GB1221805A (en) |
| NL (1) | NL6802622A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3711670A (en) * | 1970-12-30 | 1973-01-16 | Ericsson Telefon Ab L M | Selecting device for cross-point selectors with cam contact actuating means |
| US4057804A (en) * | 1973-06-21 | 1977-11-08 | Holme Communications Systems, Inc. | Branched path communications apparatus for routing communications signals |
| US4071728A (en) * | 1973-03-15 | 1978-01-31 | U.S. Philips Corporation | Crosspoint switch comprising bistable crosspoints |
| WO1992022919A1 (en) * | 1991-06-17 | 1992-12-23 | Telefonaktiebolaget Lm Ericsson | A galvanic switch |
| US5920049A (en) * | 1995-08-04 | 1999-07-06 | Telefonaktiebolaget Lm Ericsson | Crosspoint matrix switch with ball actuating members for contact mechanisms |
| US5939689A (en) * | 1995-08-04 | 1999-08-17 | Telefonaktiebolaget Lm Ericsson | Matrix-related switching arrangement including movable rods and balls |
| US11178788B2 (en) * | 2018-11-05 | 2021-11-16 | Cisco Technology, Inc. | Cooling system for a networking device with orthogonal switch bars |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2901547A (en) * | 1955-06-28 | 1959-08-25 | Bell Telephone Labor Inc | Switching system network |
| US3088999A (en) * | 1959-03-26 | 1963-05-07 | Ericsson Telefon Ab L M | Circuit arrangement for controlling cross-bar selectors in a telephone system |
| US3478285A (en) * | 1966-12-22 | 1969-11-11 | Gen Electric Co Ltd | Electric crossbar switches |
-
1967
- 1967-02-23 FR FR96300A patent/FR1522302A/en not_active Expired
-
1968
- 1968-02-19 US US706544A patent/US3614330A/en not_active Expired - Lifetime
- 1968-02-22 GB GB8647/68A patent/GB1221805A/en not_active Expired
- 1968-02-22 DE DE19681638129 patent/DE1638129A1/en active Pending
- 1968-02-23 NL NL6802622A patent/NL6802622A/xx unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2901547A (en) * | 1955-06-28 | 1959-08-25 | Bell Telephone Labor Inc | Switching system network |
| US3088999A (en) * | 1959-03-26 | 1963-05-07 | Ericsson Telefon Ab L M | Circuit arrangement for controlling cross-bar selectors in a telephone system |
| US3478285A (en) * | 1966-12-22 | 1969-11-11 | Gen Electric Co Ltd | Electric crossbar switches |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3711670A (en) * | 1970-12-30 | 1973-01-16 | Ericsson Telefon Ab L M | Selecting device for cross-point selectors with cam contact actuating means |
| US4071728A (en) * | 1973-03-15 | 1978-01-31 | U.S. Philips Corporation | Crosspoint switch comprising bistable crosspoints |
| US4057804A (en) * | 1973-06-21 | 1977-11-08 | Holme Communications Systems, Inc. | Branched path communications apparatus for routing communications signals |
| WO1992022919A1 (en) * | 1991-06-17 | 1992-12-23 | Telefonaktiebolaget Lm Ericsson | A galvanic switch |
| US5214400A (en) * | 1991-06-17 | 1993-05-25 | Telefonaktiebolaget L M Ericsson | Galvanic switch |
| AU659186B2 (en) * | 1991-06-17 | 1995-05-11 | Telefonaktiebolaget Lm Ericsson (Publ) | A galvanic switch |
| US5920049A (en) * | 1995-08-04 | 1999-07-06 | Telefonaktiebolaget Lm Ericsson | Crosspoint matrix switch with ball actuating members for contact mechanisms |
| US5939689A (en) * | 1995-08-04 | 1999-08-17 | Telefonaktiebolaget Lm Ericsson | Matrix-related switching arrangement including movable rods and balls |
| US11178788B2 (en) * | 2018-11-05 | 2021-11-16 | Cisco Technology, Inc. | Cooling system for a networking device with orthogonal switch bars |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1638129A1 (en) | 1971-02-25 |
| GB1221805A (en) | 1971-02-10 |
| FR1522302A (en) | 1968-04-26 |
| NL6802622A (en) | 1968-08-26 |
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