US1768950A - Shading coil - Google Patents
Shading coil Download PDFInfo
- Publication number
- US1768950A US1768950A US424570A US42457030A US1768950A US 1768950 A US1768950 A US 1768950A US 424570 A US424570 A US 424570A US 42457030 A US42457030 A US 42457030A US 1768950 A US1768950 A US 1768950A
- Authority
- US
- United States
- Prior art keywords
- conductor
- shading
- coil
- link
- shading coil
- 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
Links
- 239000004020 conductor Substances 0.000 description 24
- 244000145845 chattering Species 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 241000234435 Lilium Species 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
- H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements
- H01F7/1205—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements having short-circuited conductors
Description
y 1930. L. c. FRANK 1,768,950
SHADING COIL Filed Jan. 30, 1950 Fig. I.
,4 Fig. 3.
INVENTOR Leo 0. Frank.
ATTORNEY Fateeted duly 1, 1938 LEO G. FRANK, OF MCKEESPORT, PENNSYLVANIA, ASSIGNQR {BRIG &; MANUFACTURING COMPANY,
ESTINGHGHSE ELEG- A CORPORATIGN PENNSYLVANIA SHADEII (30111 Application filed January 30, Serial 4%,570.
lily invention relates generally to shading coils for alternating-current magnets.
The use of shading coils in connection with elcctroinagnets, which are energized by alternating current, to reduce chattering of the arinatures is old in the art, the theory of operation is well known and Will not be descr bed in detail.
lrleretotore, a great'deal of trouble has been. exocrienced With shading coils becom inc; loose and breaking as a result of the impact oi the armature striking the core when the magnet is actuated. This impact and also the heating of the armature causes the laminations of the arn'iature to spread. apart or expand. ,Vhen shading coils are used. on. the magnets of contactors for industrial service, which operate almost constantly, this action produces strains on the coils which cause them to break. a
An object of my invention is to provide a shading coil which may be economically manutactured and readilv assembled by a machine operation.
.A more specific object of my invention is to provide a shading coil that shallhe resilient and may be distorted. slightly in shape to permit expansion of the magnetic conductor on which it may be mounted Without subjecting the members of the coil to disrupting strains.
also object of my invention to faoili re moon of the shadin soil by n1.
. o invention, reference she d detailed descicot-ion. with the accretion hich: s View, partly in e elevation, oi an electr n coils, constructed in on, mounted t ll, 9. portion only of which is shown.
trated magnet comprises a magnetizahle core 10 of U-shape which is supported by a frame An armature is supported by an arm 13 which is pivotally mounted on the frame 11 by a pin 14.
In order to ellect the operation of the arniature 12, a coil 15 is mounted on one leg of the core 10, d When the coil 15 is excited from a source of alternating current, the core member 19 is energized and deenergized cyclically. The energization of the magnet effects the actuat tion of the armature 12 into engagement with the core member 10, hereby establishing a closed magnetic circuit.
In order to prevent chattering, which is caused by the varying flux, shading coils 16 are mounted on the armature 12. In this par ticular instance, the shading coils are made from sections of seamless tubing, usually of brass or copper, but it will be readily understood that any other suitable non-magnetic conductor may be utilized. A section of tubing so shaped to constitute an elongated link having side members 17 and recnti'ant end portions 18 for engaging the armature 19). A coil. constructed in this manner is resilient and may be distorted slightly in snaps.
vi 1 "f llie cestoniaiy slots l3 ale fjlOi ltl cl in s shown in 3, f r rece1vr Y J", m
ie S(.illl; coll. in. assen e coils are Yd departing from the spirit and scope of the inventlon, 1t 15 desired that the foregoing description be construed as illustrative and not in a limiting sense.
I claim as my invention:
1. A shading coil for the armature of an alternating-current magnet comprising an elongated link member of conducting material for mounting on the armature, said link member having its ends curved inwardly to present faces for resiliently engaging the armature to permit expansion of the latter Without imposing suiiieient strains on the link member to break it.
2. A shading coil for an alternating-current-magnet core comprising a link member of conducting material for mounting on the core, said link member having portions extending inwardly to provide resilient projections to engage the core.
3. A shading coil for a magnetic conductor comprising a link member for mounting on the conductor, said link member being curved inwardly to present a face to resiliently engage the conductor to permit a predetermined expansion of the conductor Without exerting sufficient strains to break the link.
4. A shading coil for a. magnetic conductor comprising a link of conducting material having a reentrant portion disposed to resiliently engage the magnetic conductor and to permit a predetermined expansion of the conductor Without exerting disrupting strains on the link.
5. A shading coil for a magnetic conductor comprising a link of conducting material having a plurality of reentrant portions disposed to resiliently engage the conductor and to permit a-predetermined expansion of the conductor withoutexerting disrupting strains on the'link.
6. A shading coil for a magnetic conductor comprising a section of seamless tubing so shaped as to constitute an elongated link for mounting on the conductor, said link having portions curved inwardly to resilientl; engage the conductor and to permit a predetermined expansion of the conductor Without producing suiiicient strains on the link to break it.
7. A shading coil for a magnetic conductor comprising a section of tubing having a substantially rectangular shape for mounting on the conductor, said section having portions curved inwardly to resiliently engage the conductor and to permit a predetermined expansion of the conductor without breaking the section of tubing.
In testimony whereof, i have hereunto subscribed my name this Qlst day of January,
LEO C. FRANK.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US424570A US1768950A (en) | 1930-01-30 | 1930-01-30 | Shading coil |
FR710065D FR710065A (en) | 1930-01-30 | 1931-01-27 | Improvements to the closed secondary turns of alternating current electromagnets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US424570A US1768950A (en) | 1930-01-30 | 1930-01-30 | Shading coil |
Publications (1)
Publication Number | Publication Date |
---|---|
US1768950A true US1768950A (en) | 1930-07-01 |
Family
ID=23683079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US424570A Expired - Lifetime US1768950A (en) | 1930-01-30 | 1930-01-30 | Shading coil |
Country Status (2)
Country | Link |
---|---|
US (1) | US1768950A (en) |
FR (1) | FR710065A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466592A (en) * | 1946-03-15 | 1949-04-05 | Carlos C Cleverdon | Solenoid with plunger |
US2479344A (en) * | 1944-10-26 | 1949-08-16 | Picker X Ray Corp Waite Mfg | Motor braking device |
US2494349A (en) * | 1946-08-21 | 1950-01-10 | Gen Electric | Method and means for forming stacked magnetic cores |
US2521533A (en) * | 1948-03-13 | 1950-09-05 | Gen Electric | Electric induction apparatus |
US2558640A (en) * | 1948-06-08 | 1951-06-26 | Allis Chalmers Mfg Co | Through conductor relay with detachable armature assembly |
US3671903A (en) * | 1971-02-08 | 1972-06-20 | Gte Sylvania Inc | Non-inflammable horizontal output transformer |
US3766643A (en) * | 1971-02-08 | 1973-10-23 | W Arrington | Method for fabricating a non-inflammable horizontal output transformer |
-
1930
- 1930-01-30 US US424570A patent/US1768950A/en not_active Expired - Lifetime
-
1931
- 1931-01-27 FR FR710065D patent/FR710065A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2479344A (en) * | 1944-10-26 | 1949-08-16 | Picker X Ray Corp Waite Mfg | Motor braking device |
US2466592A (en) * | 1946-03-15 | 1949-04-05 | Carlos C Cleverdon | Solenoid with plunger |
US2494349A (en) * | 1946-08-21 | 1950-01-10 | Gen Electric | Method and means for forming stacked magnetic cores |
US2521533A (en) * | 1948-03-13 | 1950-09-05 | Gen Electric | Electric induction apparatus |
US2558640A (en) * | 1948-06-08 | 1951-06-26 | Allis Chalmers Mfg Co | Through conductor relay with detachable armature assembly |
US3671903A (en) * | 1971-02-08 | 1972-06-20 | Gte Sylvania Inc | Non-inflammable horizontal output transformer |
US3766643A (en) * | 1971-02-08 | 1973-10-23 | W Arrington | Method for fabricating a non-inflammable horizontal output transformer |
Also Published As
Publication number | Publication date |
---|---|
FR710065A (en) | 1931-08-18 |
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