GB781119A - Improvements in or relating to electro-magnetic relays - Google Patents
Improvements in or relating to electro-magnetic relaysInfo
- Publication number
- GB781119A GB781119A GB1396755A GB1396755A GB781119A GB 781119 A GB781119 A GB 781119A GB 1396755 A GB1396755 A GB 1396755A GB 1396755 A GB1396755 A GB 1396755A GB 781119 A GB781119 A GB 781119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- core
- length
- equation
- relay
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
Abstract
781,119. Electromagnetic relays. PETTERSSON, G. A., and KORNFELDT, P. May 13, 1955, No. 13967/55. Class 38 (5). [Also in Group XXXV] A relay comprises a magnet core with at least two branches 1, 2, at least one coil (not shown), a pivoted armature comprising a main body 4 and at least one arm portion 5, groups of contact springs and lifting studs to lift the moving springs, the relay dimensions satisfying the equation:- where R is the length of the arm portion of the armature, L the length of the main body of the armature, (R+l) the distance between the pivot axis of the armature and the point of engagement between the armature and the lifting studs, # the maximum air gap between the armature and the core, Á the permeability of the magnetic material, Aj the cross-sectional area (b x h) of the core, b the width of the core, and (D+L 1 ) half the length of the paths of lines of force in the iron (equals a- L+C+h/2 + d/2 +L 1 ). The Specification develops the equation together with others by mathematical analyses. A relay constructed according to the equation produces a maximum contact operating force for a minimum number of ampere turns. Two examples of relays having E-shaped cores are described with reference to Figs. 7-9 and 12, 13 (not shown).
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE538144D BE538144A (en) | 1955-02-19 | ||
| DEP14101A DE1023823B (en) | 1955-02-19 | 1955-05-12 | Electromagnetic relay |
| FR1131997D FR1131997A (en) | 1955-02-19 | 1955-05-12 | Electro-magnetic relays |
| GB1396755A GB781119A (en) | 1955-05-13 | 1955-05-13 | Improvements in or relating to electro-magnetic relays |
| CH341230D CH341230A (en) | 1955-02-19 | 1955-05-13 | Electromagnetic relay |
| US518872A US2858488A (en) | 1955-02-19 | 1955-06-29 | Electromagnetic relay |
| US737182A US2918611A (en) | 1955-02-19 | 1958-03-27 | Electromagnetic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1396755A GB781119A (en) | 1955-05-13 | 1955-05-13 | Improvements in or relating to electro-magnetic relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB781119A true GB781119A (en) | 1957-08-14 |
Family
ID=10032628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1396755A Expired GB781119A (en) | 1955-02-19 | 1955-05-13 | Improvements in or relating to electro-magnetic relays |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB781119A (en) |
-
1955
- 1955-05-13 GB GB1396755A patent/GB781119A/en not_active Expired
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