GB315496A - Improvements relating to relays and other electromagnetic instruments and machines - Google Patents
Improvements relating to relays and other electromagnetic instruments and machinesInfo
- Publication number
- GB315496A GB315496A GB12160/28A GB1216028A GB315496A GB 315496 A GB315496 A GB 315496A GB 12160/28 A GB12160/28 A GB 12160/28A GB 1216028 A GB1216028 A GB 1216028A GB 315496 A GB315496 A GB 315496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- limbs
- reluctance
- magnets
- flux
- steady
- 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
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Electromagnets (AREA)
Abstract
315,496. Carpenter, R. E. H. April 25, 1928. Electromagnets .-An electromagnetic device, more particularly a contact-making relay, loudspeaker driving unit, or gramophone pick-up, comprises a vibratory armature and a magnetic structure consisting of a portion embodying a circuit of low reluctance to carry the fluctuating flux and a portion embodying two parallel paths for the steady polarizing flux and possessing a reluctance substantially larger than that of the portion of low reluctance which includes the effective air gap in which the armature vibrates. Figs 1 and 2 show a construction of a contactmaking relay in which the magnetic structure comprises a horizontal limb 1 connected by permanent magnets 2, 3 to L-shaped limbs 4, 5 which form the part of the low reluctance magnetic circuit through which the steady flux passes. Like poles of the magnets are connected to the limb 1 to the centre of which is secured the central member 6 so that the fluxes from the magnets 2. 3 pass in parallel through the member 6 in the same direction. The armature 7 carrying the tongue 8 is pivoted to the member 6 either by a knife-edged pivot or, as shown, by blade springs 9 clamped in non- magnetic brackets 10. The butts 11, 12 are adjustably mounted in pillars 13, 14 insulated from the limbs 4, 5. The outer ends of the limbs 4, 5, are connected by a bridge piece 20 of smaller cross section which carries the coil 22 and is retained in notches in the limbs by readily removable clamping plates 21. Fig. 5 is a diagram of the magnetic circuit, the low reluctance portion carrying the fluctuating flux comprising the bridge-piece 20. limbs 4, 5 and the effective air gap whilst the portion of substan tially higher reluctance embodying two paths in parallel for the steady, polarizing flux is made up of the limb 1, central member 6, limbs 4, 5 and magnets 2, 3. The reluctance of this latter portion may be increased by the insertion of saturated portions of reduced area or air gaps in the divided branches. In order to correct for any steady-current which may be flowing in the bridge-piece 20, a bar magnet 27, pivoted at 28, to the member 6 is adapted to be turned under the action of a screw 31 and spring 29 so as to assist one or other of the magnets 2, 3. When applied as a driving unit for a loud-speaker, the tongue 8 may be replaced by a reed or the member 6 may be pivoted at its lower end and itself form the reed.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL29387D NL29387C (en) | 1928-04-25 | ||
GB12160/28A GB315496A (en) | 1928-04-25 | 1928-04-25 | Improvements relating to relays and other electromagnetic instruments and machines |
FR672368D FR672368A (en) | 1928-04-25 | 1929-03-30 | Improvements to relays and other electro-magnetic devices and machines |
US352494A US1826990A (en) | 1928-04-25 | 1929-04-04 | Electromagnetic device |
DEC42877D DE607203C (en) | 1928-04-25 | 1929-04-04 | Electromagnetic device with vibrating armature, e.g. B. electromagnetic relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12160/28A GB315496A (en) | 1928-04-25 | 1928-04-25 | Improvements relating to relays and other electromagnetic instruments and machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB315496A true GB315496A (en) | 1929-07-18 |
Family
ID=9999432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12160/28A Expired GB315496A (en) | 1928-04-25 | 1928-04-25 | Improvements relating to relays and other electromagnetic instruments and machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US1826990A (en) |
DE (1) | DE607203C (en) |
FR (1) | FR672368A (en) |
GB (1) | GB315496A (en) |
NL (1) | NL29387C (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2491098A (en) * | 1940-10-14 | 1949-12-13 | Gen Railway Signal Co | Polar biased relay |
DE761496C (en) * | 1941-04-19 | 1954-10-04 | Johannes Bohmeyer | Electric slave clockwork with armature that can be stepped forward due to current surges changing polarity |
US2716232A (en) * | 1950-10-25 | 1955-08-23 | Bell Telephone Labor Inc | Flux modulated ringer |
NL178634B (en) * | 1952-05-29 | Philips Nv | DEVICE FOR DETECTING UNDESIRABLE SIGNAL COMBINATIONS OF TWO SIGNAL LAMPS FOR TRAFFIC LIGHTS. | |
BE538941A (en) * | 1954-06-14 | |||
GB793825A (en) * | 1955-11-08 | 1958-04-23 | Telephone Mfg Co Ltd | Improvements relating to polarised electromagnetic devices |
US3058038A (en) * | 1959-11-20 | 1962-10-09 | Weston Hydraulics Ltd | Torque motor with null balance |
-
0
- NL NL29387D patent/NL29387C/xx active
-
1928
- 1928-04-25 GB GB12160/28A patent/GB315496A/en not_active Expired
-
1929
- 1929-03-30 FR FR672368D patent/FR672368A/en not_active Expired
- 1929-04-04 DE DEC42877D patent/DE607203C/en not_active Expired
- 1929-04-04 US US352494A patent/US1826990A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR672368A (en) | 1929-12-27 |
NL29387C (en) | |
DE607203C (en) | 1934-12-19 |
US1826990A (en) | 1931-10-13 |
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