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Publication numberUS984748 A
Publication typeGrant
Publication dateFeb 21, 1911
Filing dateNov 2, 1910
Priority dateNov 2, 1910
Publication numberUS 984748 A, US 984748A, US-A-984748, US984748 A, US984748A
InventorsJohn P Coleman
Original AssigneeUnion Switch & Signal Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electromagnetic apparatus.
US 984748 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)



' APPLICATION FILED NOV.2,1910. 984,748, Y Patented Feb. 21,1911.


w A g m wv wx & M MK mi/g .a v w WITNESSES:


Patented Feb. 21, 1911.



Patented Feb. 21, 1911.





984,748. Specification of Letters Patent; Patented Feb. 21, 1911. Application filed November 2,1910. semi o. 590.314.

T aZZ wh0m it may concern.v I ets S), t), are held in place h means f'screws Be it known that I, Jonx P. COLEMAS H which passthrough the base plate portion citizen of the United States. and a resident of the frame. 'lhese ln'aekets extend upof the borough of Manhattan, in the city, ward to the top-plate 7. to whit-h they are 5 county, and State of Xew York have in,- seeurml hr m uwht'Screws 11, as shown in (it) vented certain new and useful lniprovemcnth 'Fig. .1, it'lon'ntetl between the two brackets in Electromagnetic Apparatus, of which the 9-, 9. is it solenoid. coil 1 T is SUP-w following is a specification. I poi-ted. .aashmvn in Fig. n sh n l r 1? My invention relates to electromagnetic formed by Slightly flaring out. the upper ap 'iaratus of the typeatlapted to he operated edges of the Wehhetl portions of the hraclgets Go by alternating current, and particularly to 9. t):v and the coil ifi'fttl'ther. heltl securely apparatus of this characteradapted to conin place by means; of I halts 14 pa sing etrol such devices as a pin-valve for pneu tween the two uprights, of the sup -iorting matic apparatus, the armature or'movable frame of the upper portiona of he l 'flt' i t' i5 meiuher of a relay device, or similar mecha- 9.19, as shown in Rigs. .3 audit. 15, 1 ilesig- 70 nism. v nate two ari'uatures whiehare m d to An object of in y invention is the provision have relative movements, One armature of apparatus of this character which will 0p; niay be stationary and .the other pivot ally,

erate with a minimum amount of chattering; mounted to have movement l'tlativel wtothe 0 and with a maximum amount of holding. stationary one,'ol"hoth may he pivotetli 76 power for a given consumption of energy. here shown both are pivotally mounted he- I will describe oneforni of ,apparatusenn tween the'two brackets J, H. The tll'lnatnt'es hodying m v invention, and then point out are prefwahly of Soft iron ainl itlllllllilltti.

the novel-features thereof in claims. I Each of these armatnres in the torni-lwreiu In theaccompanying drawings, Figure 1v shown. coml'n'ises an upright body portion 80 a view showing in sitie elevation, partly and three'horizontally iliapolqetl arms, th

serttontahone form of electro-magnetie aphitter being designated in noarawin s paratus embodying my invention. Fig. 2 is a, 7) tllltiif, Of these arms. lhearnm usejr\'e .iew showingiireml elevation. partly see as suppor ts tor the pivot pins 17,. while the 3O tionetl. the apparatus shown in Fig.1. Fig. arms (1 and!) perform the functions" otipo le s5 3 is a view similar-to Fig. 1, hut showing -pieees. anii fo'rfthiS purporie are. each pro-,. the parts of the ap 'iaratus in their closed Vitittl with a ft-shadingJmndj or ,short eiror energized positions. Fi 4 is a sectional euiting coil 16comprising,a han i of copper view on the line 4--+4 of Pig. 3. and Fig. mq flmr good electrical t'omlnetor paasingj is a sectional view on the line of Fig. l. aronntl approximatelyone-halt of the area. 90

Fig. 6 is a view showing an application of of the face ofeaclr'of'tlu-se mle;pieees. 'lh an electrwmagnetic" apparatus embodyingarrangem'ent is clearly.shown in Figs. 1 aut my invention to the operation of the arma- 2. The ol'ijeet of these shatling hands is to ture or movable contacts of an electric-relay. prevent as "far as possible the total (leiin- Fig. 7 is a'view showing the application of ergization' of the pole-pieeegduring the pe '95 I such an apparatus to the operation of a pin- 'l'lfltht ot' reversals of the alternating etnrent.

valve for pneumatic apparatus. Fig. Sis a The shading-hands pret'e'rahl v exi -nil itllli'. iew showing in rletail certain mechanical ward a small distance from the 'l atfle; ol' the features of the apparatua shown in the prepole-D r $h i or the purpose of pr":

coiling views. venting theac'tnal eontaet of their-on otthr;

Similar reference characters refer tosimitwo arn'nitures when lht hill" in. hlll lar parts throughout the. several views. energized or closed positions. Helm-ring now to the first, five figuresot' The arInaHIreH are So arraugeththat; the

the drawings. the numeral ti' designates. 'an olwpieceul) enter the hole of the solenoiil 5t) inclosing cover of aluminum. glass or other coil 1'2. while the rmlepieees a pass above 10 auil'ahl material. 7 represents the upper lh coil 12 antl meet. at agl'ealel ra lins i l t'llll entl of a frame formed by its union with the point of pjvoting 17. The upper edges hottoiu plate 3 aml the nprightsh. ()n the ol' pole-pieresli are LlItYt'lttl as also the lower eml of the frame ia a Htlttl 8. for Seeur shading-ham'la it, on these jn le-piei'es. its

L35 ing the. wow! (3. The two supporting hraekshown in high. 1 alnll, fl l! I P "1,110

apart by rotation on their avoiding? interference withft-he interibrisiiiface of the coil 12. It will be noted in Figs.

1 anda? that the-adjacent .endst-tof-the legs, 7. 4 t v e'xccsslve pressure is avoided on the device to be operated, and some range is-providcd or bearings drape -b. "shaped that when the; armatures are tCldSd or drawn together until their pole-pieces?) andc are in co ntact respectively, as shownin Fig. 3, there is an, opening or I airgap between then ends 0t the bearings'a at the point 18-. When, however, the arimitures areZpermittc'dWO fall ivots, this airgap18-btzc01nes smaller unti -the bearings a come into contact at "that point-,:"and *the armature's'are then heldfin the-positionsshown bdclyingmy,invention, will exp ainthe op,

eration' of this apparatuspand willthen 'de-.. scribe af means 0 adaptingit to the, per

" formance of work;:-

" feet. an'opening'ofthe cireultgat. that pomt As hereinbefore explained, the armatu'res are so] shaped iii the portions adjacent to, their pivots/as to normally form a closed magnetic circuit at the) point lsya'n'd-to efwhen the ,aiinatures have assumed their losedior energizcd positions as shown' in. Fig.1. lvhenlan' elect'rie currentis passed through"; the .c'oil -12 ",{a jmanetic flux is developed through-1 the 1 center pole pieces I) and 'thefpivotediarms .af of fthe armatures. Under-the i nfluence .of 'tlhisflux' .th'e *arma-' tures are drawn together, opening the anagnctic circuitat }the oi1'1't 18 and bringing the pole-pieces,' b ;a1 ,c"i nto' close relation resjmctivelyg "The effect ofjthis closing f'to-' gethe'r'of -.the arm'aturcsis to establish a magneti'cfcircuitiof relatively low reluctance through the ,center and f upper polepieces b and -c, "at.the same time makin theirelucmnc'e relatively high in am at originally taken by the flux through? t iejcenter polepieces If andfthe bearings a. 1 Consequently the preponderance ofm'signctic flux will'take the1u'pperpath and this path being; at a large radius f fromr'the point. of support of the; arm aturs, a gre ter"; holdin power or torqu'i's obtainedthan'is possible, when the magnetic fiup is causedltoflow alwaysinthe same path Likewise (there is a relatively;

links pivotally' secured to" the armatures 9;

9 as; lown'particula-rly in: Figs- 1 and"2," Mounted at the. upper ends of {these links is a ma fl ciihleplate 2Qof'thinihronze or other suitable flexible material. to the center of 'l' 'l f -i qllj nul 22 through which porting base 25.

motion is transmitted to any device which is to'be operated by the electro-magnetic apparatus. By means of this flexible plate 20,

"lar to that shown in detail in Fig. 8. Re

ferring to this view' it will be seal that vertical slots 23 are cut into the upper ends of the links 19,'and.- that blocks 21 of cold rolledsteel or other suitable material turned down near each end to fit'the slots 23, are riveted to the plate 20 at or near the ends of'the plate. The plate 20 may'ther'efore easily be removed 'froin the links 19 by rais-,

ing it," in case of necessity, to disassemble the apparatus; x

Re erring to Fig. 2, I have here shown two terminal posts 24 fitted to the cover portion 7=of the inclosing case, ,by meansof, which-electrical connections may be led to the solenoid coil 12.:

Referring now to Fig. 6, I have hereshown an application of an apparatus embodying 'my invention to the operation of the armature or movablecontacts of an electric-i'relay devicef Gdesignates as before the inclosing case which. for this particular ap plication, is preferably provided with amp The operating rod 22 is for this application pivotally secured to'the flcxibleplate 20, and again pivotally secured at its-upper end to a pivoted armature-26 carrying contact fingers 27. mentof the cont acts, contact fingers, terminal posts, etc., of a relay device of this type is too familiar .to require further description.

pneumatic apparatus. 28 designates a pinvalve,wh1ch1sshown as being raised bymeans of the rod 22 for the admission of air or other fluid from the inletgto the cylinder or other place in which theiluid is desired. \Vhen the upward pressure on the rod 22 exerted by theelectro-maguetic apparatusvbelow is released, thevalve 28 is moved downward by gravity and by fluid pressure to-clos the conn'ect-ion between the inlet and the cyl-Iv 1nder,- and to o en the connection between the cylinder an the exhaust. Having thusdescribed my invention, what I claim is: i

' 1. An electromagnetic apparatus having in combination, an energizing coil, two armatures pivotally mounted to have relu- The arrange- Referring now to Fig. 7 I have here shown the application of an apparatus embodying. my invention to a pin-valve device fore", 110

tivemovements and adapted to be excited by said coil and lravirug two .paths for magnetic flux, one of said paths being at a small radius from the pivotal points and having 1 being at a large-radius from the the lower reluctance of the two paths when t": armatures are open, and fiie other path,

being at a large radius from the pivotal points and having the lows]; reluctance of the two paths when thear natures are closed. 2. An electromagnetic apparatus com-- prising an energizing coil, two armatures'e pivotally mounted to have relative movement, and two paths for magnetic fiux throughsaid arfiii atures, 'one. of 'said paths being at a smallradius from the pivotal points and adapted to be energized when the armatures are open, the other of said paths lvota-l points and adapted to be energize the armatures areclosed. V

lectro magnetic apparatus com:

prising an energizing'coil, and two armatures pivotally-mounted to have relative l gized positions.

movement provided with arms adapted to form two ,magnetic paths through said armatures at different radii from the piv-v otal points for magnetic flux. induced by said coil, the path at the smaller radius having the lower reluctance of the two when the armatures are in their open or deiinergized FOSihiOHSyflIld the path at the greaterradius av'ing the lower reluctance of the two when the armatures are in their closed or ener- 4, An electroniagnetic device comprismg. an energizing c011,: and. two pivotally mounted armatures, said armatures being adapted to rovide 7 two paths. for magnetic flux at di erent radii from the pivotal points, the path at the smaller radius being [energized to move the armatures to their closed positions, and the path. at the larger when radius being energized to hold the armatures in their closed'positions.

' '5. An electromagnetic apparatus having in combination, on energiz ng coil, two pivotally mounted arm'atures each having two ole-pieces, the pole-pieces of one armature heing op osite the corresponding pole-pieces of theot erarmature, said armatures hav:

in two-paths for magnetic flux, one path being through the parts adjacent the pivotal pnintg -and one set of le-pieces, said path liavin" j-the lower re uctance' of e two pathswhen the armatures are 'open, the other path bei throu h'the two sets of of the two paths when'the armatures are closed.-

6. An electro-magnetic apparatus com-v prising an energizing coil, two pitotally mounted armatures, projecting arms carried by said armatures adapted to provide two paths throu h said armatures at different radii from t e pivotal lpoints for the mag-- JOHN P. O E AN,

- 0. 0. Warm,- Jaime CHALMEBS, Jr.

7 itness'es:

pole-pieces and aving t e lowerreluctance '.specificati0n n the presence of two -su.b-

scribed witnesses.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2546053 *Sep 1, 1948Mar 20, 1951Gen ElectricElectromagnet control device
US3754199 *Sep 29, 1972Aug 21, 1973IbmMagnetic mechanical amplifier
US4488099 *Dec 3, 1982Dec 11, 1984Novacor Medical CorporationReal time servo control apparatus and method
US4577174 *Mar 11, 1985Mar 18, 1986Square D Starkstrom GmbhElectromagnet for electric switching device
US4773772 *Jun 13, 1986Sep 27, 1988Ncr CorporationPrinting apparatus
WO1984002204A1 *Nov 30, 1983Jun 7, 1984Novacor Medical CorpReal time servo control apparatus and method
Cooperative ClassificationH01H71/345