US3121194A - Polarized electromagnetic device - Google Patents

Polarized electromagnetic device Download PDF

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Publication number
US3121194A
US3121194A US12174A US1217460A US3121194A US 3121194 A US3121194 A US 3121194A US 12174 A US12174 A US 12174A US 1217460 A US1217460 A US 1217460A US 3121194 A US3121194 A US 3121194A
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core
frame
extending
armature
pole pieces
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US12174A
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Stehlik Rudolph Frank
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Automatic Electric Laboratories Inc
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Automatic Electric Laboratories Inc
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Priority to US12174A priority Critical patent/US3121194A/en
Priority to BE594919A priority patent/BE594919A/en
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated

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  • FIG.2a I I 7 i I I I E I G 23 l IIJTM mm k A I I I I l J 22 FIG.2a
  • the present invention relates to polarized electromagnetic structures or devices. Specifically the invention relates to a single coil alternating current signalling device or the like and more particularly concerns bells suitable for use in telephone systems or similar situations.
  • the principal object of the invention is to provide a bell which can be manufactured cheaply and in addition to being very light in weight, possesses compactness so that it can be installed in a conveniently small space.
  • a feature therefore of this invention is to provide a one piece integral ringer armature, hammer arm and hammer combined.
  • a second feature of this invention resides in the relationship of a single coil and magnetic circuit to the abovementioned integral armature hammer.
  • FIG. 1 is a front view of a ringer structure embodying the features of this invention
  • FIG. 2 is a front view of the one piece armature hammer and FIG. 2a is a top view thereof;
  • FIG. 3 is a top view of the mounting frame
  • FIG. 3a is a view taken from the bottom of FIG. 3;
  • FIG. 3b is a view taken from the right side of FIG. 3;
  • FIG. 4 shows a top view of one of two polar plates
  • FIGS. 5, 6 and 7 are schematic representations illustrating the flux paths set up by the permanent magnet and the electromagnet employed in the ringer.
  • the frame 30, constructed of brass or other suitable non-magnetic material, is shown supporting the soft iron coil pole pieces 16, staked at four corners thereof.
  • a ringer coil 14, wound on an iron core 10, having insulated spool heads 13, is disposed between the coil pole pieces 16, and fastened thereto by the screws 12.
  • the frame 30 has a bent leg 32 perpendicular to the main portion thereof lying flush against the base plate 1.
  • a hole 33 is provided in leg 32 for insertion of a screw for fastening the frame 30 at one end to the base 1.
  • a slotted hole 34 is provided through which a screw is inserted and screwed into a threaded hole (not shown) in base plate 1 for adjustably securing the frame 30 to the base 1 at the opposite end.
  • FIGS. 3, 3a, and 3b The particular form of the mounting frame 30 can be more clearly ascertained from FIGS. 3, 3a, and 3b.
  • At the outer ends of frame 30 are four lobes 38 for securing the pole pieces 16 within the aperture portion designated as 37.
  • An opening designated as 39, is utilized to securely squeeze the legs 41 of two polarizing plates 40 between pole pieces 16 and the frame 30.
  • the form of the two polarizing plates can be more clearly ascertained by the one shown in FIG. 4. As seen in FIG. 1 there is a gap between the inner ends of the two polarizing plates 40 as they lie horizontally.
  • the notches 42 on the polar plates 40 permit the frame 30 to rest at a prescribed horizontal level in acocrdance with notches on the pole pieces 16, whereby portions of legs 41 and portions of pole pieces 16 pro trude upwardly through the apertures on the frame 30.
  • a cleft or opening 31 is utilized for insertion of a rectangularly shaped permanent magnet 15 for resting on and bridging the gap between the polar plates 40, and secured thereon by two inverted L-shaped ears 36 of the frame 30 overlapping the top of the magnet.
  • Spanning the upper ends of the insulated terminal members 13 is a preferably brass or other non-magnetizable flat spring 19, which tensions the polar plates 40 in an upward direction. The tension exerted by the spring 19 on the polar plates 40, further tend to stabilize the permanent magnet 15 within the ears 36 and cleft 31.
  • the combination armaturehammer comprises a fiat armature portion 20, and along one edge rising perpendicular to the flat side, an elbow 22 forms the integral connection with the hammer arm 21 which extends parallel to the flat surface of the armature.
  • the hammer 23 lying between the two gongs 29 and 29' which are secured tothe base 1 by screws 28.
  • Theelbow 22 has a bearing pin hole 24 in alignment with a hole (not shown) in a lobe 26 on armature 20, which holes lie in alignment between holes 37 on the integral flanges 35 of frame 36 where a bearing pin 18 is insertably secured by staking the ends of the pin within the holes 37'.
  • Two indentations 25 in armature-hammer 20 form openings above the inverted L-shaped ears 36 of frame 30, to prevent engagement of the armature with these ears during pivotal movement of the one piece armature-hammer while, at the same time, keeping the air gap between the armature and the magnet at a minimum.
  • the entire unit can be movably adjusted to place the hammer 23 at a point desired between the gongs 29 and 29'.
  • the screw holes in the gongs are off centered to further align the gongs in a desired location in relation to the hammer 23, for a desirable hammer stroke adjustment.
  • FIGS. 5, 6 and 7. In these figures the permanent magnet, magnet core, polar plates and iron pieces are shown as integral parts to simplify the schematic.
  • the letters N and S indicate the north and south poles respectively of the permanent magnet 15 (FIG. 1).
  • FIG. 5 shows the path of the permanent magnet flux when uninfiuenced by flux set up by the operating coil.
  • FIG. 6 shows the path of the polarizing flux and the flux set up by the operating coil during the application of one-half cycle of ringing current thereto and the resulting attraction on the armature.
  • FIG. 7 shows the path of the polarizing flux and the flux set up by the operating coil during the application of the second half of the same cycle of ringing current thereto and the consequent actuation of the armature.
  • a core In a telephone ringer, a core, an electromagnet wound on said core, a pole piece of magnetic iron fixed to each end of said core and extending at right angles thereto, a frame having openings at each end thereof and an opening in the center thereof, the extending ends of said pole pieces inserted through the openings in the ends of said frame so that the frame lies parallel to said core, a permanent magnet inserted in the center opening of said frame and magnetized in a direction at right angles to the length of said core, a pair of L-shaped polar plates with the short ends thereof lying parallel to said pole pieces and extending through said end openings in said frame and the longer ends thereof extending toward each other between said core and said permanent magnet and forming an air gap between said longer ends, a bowed spring extending between the ends of said core and bowed upward'to force said long ends of said L-shaped polar plates and said permanent magnet outward from said core, and an armature pivoted at its center point to the center of said frame and having its ends lying adjacent the ends of
  • an operating mechanism for vibrating the clapper comprising a core of magnetic iron having a winding thereon, a pair of pole pieces secured to the ends of said core and extending upward at right angles therefrom, an armature pivoted at its center point and having its outer ends lying adjacent the ends of said pole pieces, a pair of L shaped pole piece extensions having their short ends lying parallel to the outer ends of said pole pieces and their longer ends extending toward each other in a plane parallel with the said core and armature and between the armature and core and providing a short air gap between said longer ends, a permanent magnet, polarized in a direction at right angles to the length of the core and mounted between said air gap in the pole piece extensions and the armature, a frame having a pair of bearings thereon upon which said armature is pivoted, and a tension spring for securing said pole pieces, said extensions and said permanent magnet to said frame.
  • An electromagnetic structure comprising a core of magnetic material having a wound bobbin thereon,
  • said frame having a center opening, an aperture portion at each end, a pair of ears formed on said frame outwardly of said opening, and means for pivoting said armature at its center on said frame,

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnets (AREA)

Description

Feb. 11, 1964 R. F. STEHLIK 3,121,194
POLARIZED ELECTROMAGNETIC DEVICE Filed March 1, 1960 2 Sheets-Sheet 1 I INVEN TOR. RUdO/ph F SfGh/I'k Feb. 11, 1964 R. F. STEHLIK 3,
POLARIZED ELECTROMAGNETIC DEVICE Filed March 1, 1960 2 Sheets-Sheet 2 FIG. 312
26 I I 7 i I I I E I G 23 l IIJTM mm k A I I I I l J 22 FIG.2a
INVEN TOR. Rudolph F. Sfehl/lr Affy.
United States Patent 3,121,194 POLARIZED ELECTROMAGNETIC DEVICE Rudolph Frank Stehlik, Antwerp, Belgium, assignor to Automatic Electric Laboratories, Inc., Northlake, 111., a corporation of Delaware Filed Mar. 1, 1960, Ser. No. 12,174 4 Claims. (Cl. 317171) The present invention relates to polarized electromagnetic structures or devices. Specifically the invention relates to a single coil alternating current signalling device or the like and more particularly concerns bells suitable for use in telephone systems or similar situations. The principal object of the invention is to provide a bell which can be manufactured cheaply and in addition to being very light in weight, possesses compactness so that it can be installed in a conveniently small space.
In the past, a multitude of small parts were required to be assembled to make up a compact alternating current signalling device. For instance, aside from the core and soft end iron pieces, separate armatures, hammers, hammer arms, pivot pins therefor, and bolts, rivets etc., all went into making this assembly. A feature therefore of this invention is to provide a one piece integral ringer armature, hammer arm and hammer combined.
A second feature of this invention resides in the relationship of a single coil and magnetic circuit to the abovementioned integral armature hammer.
Other objects and features of this invention will become apparent from a perusal of the following specification taken in conjunction with the accompanying drawings, of which:
FIG. 1 is a front view of a ringer structure embodying the features of this invention;
FIG. 2 is a front view of the one piece armature hammer and FIG. 2a is a top view thereof;
FIG. 3 is a top view of the mounting frame;
FIG. 3a is a view taken from the bottom of FIG. 3;
FIG. 3b is a view taken from the right side of FIG. 3;
FIG. 4 shows a top view of one of two polar plates;
FIGS. 5, 6 and 7 are schematic representations illustrating the flux paths set up by the permanent magnet and the electromagnet employed in the ringer.
Referring to FIG. 1, the frame 30, constructed of brass or other suitable non-magnetic material, is shown supporting the soft iron coil pole pieces 16, staked at four corners thereof. A ringer coil 14, wound on an iron core 10, having insulated spool heads 13, is disposed between the coil pole pieces 16, and fastened thereto by the screws 12. The frame 30 has a bent leg 32 perpendicular to the main portion thereof lying flush against the base plate 1. A hole 33 is provided in leg 32 for insertion of a screw for fastening the frame 30 at one end to the base 1. Also, a slotted hole 34 is provided through which a screw is inserted and screwed into a threaded hole (not shown) in base plate 1 for adjustably securing the frame 30 to the base 1 at the opposite end. The particular form of the mounting frame 30 can be more clearly ascertained from FIGS. 3, 3a, and 3b. At the outer ends of frame 30 are four lobes 38 for securing the pole pieces 16 within the aperture portion designated as 37. An opening designated as 39, is utilized to securely squeeze the legs 41 of two polarizing plates 40 between pole pieces 16 and the frame 30. The form of the two polarizing plates can be more clearly ascertained by the one shown in FIG. 4. As seen in FIG. 1 there is a gap between the inner ends of the two polarizing plates 40 as they lie horizontally. The notches 42 on the polar plates 40 permit the frame 30 to rest at a prescribed horizontal level in acocrdance with notches on the pole pieces 16, whereby portions of legs 41 and portions of pole pieces 16 pro trude upwardly through the apertures on the frame 30.
"ice
A cleft or opening 31 is utilized for insertion of a rectangularly shaped permanent magnet 15 for resting on and bridging the gap between the polar plates 40, and secured thereon by two inverted L-shaped ears 36 of the frame 30 overlapping the top of the magnet. Spanning the upper ends of the insulated terminal members 13 is a preferably brass or other non-magnetizable flat spring 19, which tensions the polar plates 40 in an upward direction. The tension exerted by the spring 19 on the polar plates 40, further tend to stabilize the permanent magnet 15 within the ears 36 and cleft 31.
Referring to FIGS. 2 and 2a, the combination armaturehammer comprises a fiat armature portion 20, and along one edge rising perpendicular to the flat side, an elbow 22 forms the integral connection with the hammer arm 21 which extends parallel to the flat surface of the armature. At the extreme end of hammer arm 21 is the hammer 23 lying between the two gongs 29 and 29' which are secured tothe base 1 by screws 28. Theelbow 22 has a bearing pin hole 24 in alignment with a hole (not shown) in a lobe 26 on armature 20, which holes lie in alignment between holes 37 on the integral flanges 35 of frame 36 where a bearing pin 18 is insertably secured by staking the ends of the pin within the holes 37'. Thus the one piece armature-hammer will pivot on hearing pin 18. Two indentations 25 in armature-hammer 20 form openings above the inverted L-shaped ears 36 of frame 30, to prevent engagement of the armature with these ears during pivotal movement of the one piece armature-hammer while, at the same time, keeping the air gap between the armature and the magnet at a minimum.
It should be appreciated that with the slotted hole 34, the entire unit can be movably adjusted to place the hammer 23 at a point desired between the gongs 29 and 29'. Furthermore, the screw holes in the gongs are off centered to further align the gongs in a desired location in relation to the hammer 23, for a desirable hammer stroke adjustment.
Reference is now made to FIGS. 5, 6 and 7. In these figures the permanent magnet, magnet core, polar plates and iron pieces are shown as integral parts to simplify the schematic. The letters N and S indicate the north and south poles respectively of the permanent magnet 15 (FIG. 1). FIG. 5 shows the path of the permanent magnet flux when uninfiuenced by flux set up by the operating coil. FIG. 6 shows the path of the polarizing flux and the flux set up by the operating coil during the application of one-half cycle of ringing current thereto and the resulting attraction on the armature. FIG. 7 shows the path of the polarizing flux and the flux set up by the operating coil during the application of the second half of the same cycle of ringing current thereto and the consequent actuation of the armature.
Thus, on the energization of the coil 14 by current in the proper direction the one-piece armature hammer is attracted to one of the pole pieces and is pivotally moved in a first direction to cause hammer 23 to strike gong 29, while with current in the reverse direction the armature is attracted to the other pole pieces and the hammer 23 strikes the gong 29. In this manner the alternate energization and de-energization of the coil 14 produces the required ring.
From the foregoing it will be appreciated that a new ringing device has been devised, which is economical to manufacture, is very compact, requires a minimum of parts and assemblance, requires very little space for mounting, and is comparatively light in weight.
What I claim and desire to secure by Letters Patent is:
1. In a telephone ringer, a core, an electromagnet wound on said core, a pole piece of magnetic iron fixed to each end of said core and extending at right angles thereto, a frame having openings at each end thereof and an opening in the center thereof, the extending ends of said pole pieces inserted through the openings in the ends of said frame so that the frame lies parallel to said core, a permanent magnet inserted in the center opening of said frame and magnetized in a direction at right angles to the length of said core, a pair of L-shaped polar plates with the short ends thereof lying parallel to said pole pieces and extending through said end openings in said frame and the longer ends thereof extending toward each other between said core and said permanent magnet and forming an air gap between said longer ends, a bowed spring extending between the ends of said core and bowed upward'to force said long ends of said L-shaped polar plates and said permanent magnet outward from said core, and an armature pivoted at its center point to the center of said frame and having its ends lying adjacent the ends of said pole pieces, and a hammer arm-clapper integral with and extending in a plane parallel with that of the said armature for striking the gongs of said ringer when the armature is vibrated.
2. In a telephone ringer having gongs and a clapper therefore, an operating mechanism for vibrating the clapper comprising a core of magnetic iron having a winding thereon, a pair of pole pieces secured to the ends of said core and extending upward at right angles therefrom, an armature pivoted at its center point and having its outer ends lying adjacent the ends of said pole pieces, a pair of L shaped pole piece extensions having their short ends lying parallel to the outer ends of said pole pieces and their longer ends extending toward each other in a plane parallel with the said core and armature and between the armature and core and providing a short air gap between said longer ends, a permanent magnet, polarized in a direction at right angles to the length of the core and mounted between said air gap in the pole piece extensions and the armature, a frame having a pair of bearings thereon upon which said armature is pivoted, and a tension spring for securing said pole pieces, said extensions and said permanent magnet to said frame.
3. An electromagnetic structure comprising a core of magnetic material having a wound bobbin thereon,
a pair of pole pieces extending at right angles from said core,
an armature,
a frame of non-magnetic sheet material etxending between said pole pieces,
said frame having a center opening, an aperture portion at each end, a pair of ears formed on said frame outwardly of said opening, and means for pivoting said armature at its center on said frame,
.a permanent magnet extending through said opening,
a pair of L-shaped members of magnetic material, the
long legs of said members extending from said pole pieces toward each other in the space between said magnet and said bobbin, and the short legs of said members, as well as said pole pieces, extending through said aperture portions and being fastened to said frame,
and a non-magnetic leaf spring pressing with its ends against said bobbin and with its center against the long legs of said L-shaped members to urge said members against said magnet and said magnet against said ears.
4. An electromagnetic structure as claimed in claim 3, wherein indentations are formed in said armature opposite said ears on said frame to accommodate said ears and thereby provide minimum spacing between said armature and said magnet.
References Cited in the file of this patent UNITED STATES PATENTS 2,547,537 Power Apr. 3, 1951 2,733,435 Bredenhoft Jan. 31, 1956 2,890,447 Lohs et al June 9, 1959 2,928,028 Persson Mar. 8, 1960 2,941,130 Fischer June 14, 1960 FOREIGN PATENTS 745,952 Great Britain Mar. 7, 1956

Claims (1)

1. IN A TELEPHONE RINGER, A CORE, AN ELECTROMAGNET WOUND ON SAID CORE, A POLE PIECE OF MAGNETIC IRON FIXED TO EACH END OF SAID CORE AND EXTENDING AT RIGHT ANGLES THERETO, A FRAME HAVING OPENINGS AT EACH END THEREOF AND AN OPENING IN THE CENTER THEREOF, THE EXTENDING ENDS OF SAID POLE PIECES INSERTED THROUGH THE OPENINGS IN THE ENDS OF SAID FRAME SO THAT THE FRAME LIES PARALLEL TO SAID CORE, A PERMANENT MAGNET INSERTED IN THE CENTER OPENING OF SAID FRAME AND MAGNETIZED IN A DIRECTION AT RIGHT ANGLES TO THE LENGTH OF SAID CORE, A PAIR OF L-SHAPED POLAR PLATES WITH THE SHORT ENDS THEREOF LYING PARALLEL TO SAID POLE PIECES AND EXTENDING THROUGH SAID END OPENINGS IN SAID FRAME AND THE LONGER ENDS THEREOF EXTENDING TOWARD EACH OTHER BETWEEN SAID CORE AND SAID PERMANENT MAGNET AND FORMING AN AIR GAP BETWEEN SAID LONGER ENDS, A BOWED SPRING EXTENDING BETWEEN THE ENDS OF SAID CORE AND BOWED UPWARD TO FORCE SAID LONG ENDS OF SAID L-SHAPED POLAR PLATES AND SAID PERMANENT MAGNET OUTWARD FROM SAID CORE, AND AN ARMATURE PIVOTED AT ITS CENTER POINT TO THE CENTER OF SAID FRAME AND HAVING ITS ENDS LYING ADJACENT THE ENDS OF SAID POLE PIECES, AND A HAMMER ARM-CLAPPER INTEGRAL WITH AND EXTENDING IN A PLANE PARALLEL WITH THAT OF THE SAID ARMATURE FOR STRIKING THE GONGS OF SAID RINGER WHEN THE ARMATURE IS VIBRATED.
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BE594919A BE594919A (en) 1960-03-01 1960-09-12 One piece frame and hammer for ringing.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346858A (en) * 1964-06-08 1967-10-10 Int Standard Electric Corp Telephone ringer
US20080204177A1 (en) * 2005-08-05 2008-08-28 Koninklijke Philips Electronics N.V. Pendulum Drive System for Personal Care Appliances
US20120147715A1 (en) * 2010-12-10 2012-06-14 Montres Breguet Sa Striking mechanism for a watch or a music box
US20160299472A1 (en) * 2015-04-09 2016-10-13 Montres Breguet S.A. Mechanism for the magnetic actuation of timepiece striking mechanisms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547537A (en) * 1948-12-22 1951-04-03 Bell Telephone Labor Inc Telephone ringer
US2733435A (en) * 1956-01-31 bredehoft
GB745952A (en) * 1952-10-24 1956-03-07 Licentia Gmbh An electro-magnetically operated switch, particularly a contactor
US2890447A (en) * 1956-06-21 1959-06-09 Siemens Ag Electromagnetic drive system for relays, ringers and the like
US2928028A (en) * 1957-03-20 1960-03-08 Ericsson Telefon Ab L M Polarized magnet arrangement
US2941130A (en) * 1956-09-14 1960-06-14 Siemens Ag Polarized relay

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733435A (en) * 1956-01-31 bredehoft
US2547537A (en) * 1948-12-22 1951-04-03 Bell Telephone Labor Inc Telephone ringer
GB745952A (en) * 1952-10-24 1956-03-07 Licentia Gmbh An electro-magnetically operated switch, particularly a contactor
US2890447A (en) * 1956-06-21 1959-06-09 Siemens Ag Electromagnetic drive system for relays, ringers and the like
US2941130A (en) * 1956-09-14 1960-06-14 Siemens Ag Polarized relay
US2928028A (en) * 1957-03-20 1960-03-08 Ericsson Telefon Ab L M Polarized magnet arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346858A (en) * 1964-06-08 1967-10-10 Int Standard Electric Corp Telephone ringer
US20080204177A1 (en) * 2005-08-05 2008-08-28 Koninklijke Philips Electronics N.V. Pendulum Drive System for Personal Care Appliances
US7852182B2 (en) * 2005-08-05 2010-12-14 Koninklijke Philips Electronics N.V. Pendulum drive system for personal care appliances
US20120147715A1 (en) * 2010-12-10 2012-06-14 Montres Breguet Sa Striking mechanism for a watch or a music box
US8559277B2 (en) * 2010-12-10 2013-10-15 Montres Breguet Sa Striking mechanism for a watch or a music box
US20160299472A1 (en) * 2015-04-09 2016-10-13 Montres Breguet S.A. Mechanism for the magnetic actuation of timepiece striking mechanisms
US9599963B2 (en) * 2015-04-09 2017-03-21 Montres Breguet S.A. Mechanism for the magnetic actuation of timepiece striking mechanisms

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