US2424550A - Electric ringer - Google Patents

Description

July 29, 1947. v 0. J. J. BRACKE 2,424,550

ELECTRIC RINGER Filed Feb. 12, 1945 2 Sheets-Sheet l INVENTOR mMAJJE/B ICAE ATTORNEY 1947. o. J. J. BRACKE ELECTRIC RINGER July 29 Filed Feb. 12, 1943 2 Sheets-Sheet 2 III ilNVENTOR ATTORNEY Patented July 29, 1947 ELECTRIC RINGER Oscar J. J Bracke, Antwerp, Belgium,

International N cw York, N.

Application February 12 Inthe Netherla assignor to Standard Electric Corporation, E, a: corporation of Delaware 1943, Serial No. 475,688 nds andBelgium- November 15, 1940 6: Glaims.

This invention relates to hell ringers for subscriber telephone sets and more particularly to improvements in ringers of the type disclosed for example in Belgian Patent No. 437,365.

A principal object of the inventionis to provide an improved armature pivot support and attachment for telephone bell ringers and the like.

A feature of the invention relates to a subscribers telephone bell ringer wherein the electro magnetic armatureis provided with a pivot-bearing support and attachment, whereby the armature can be fastened firmly in a fixed member after the gap adjustment with respect to the electromagnet cores has been accurately gauged. In carrying out this feature, the armature is supported on two fixed pivots each in the form of a rigid rod integrally fastened to the permanent magnet portion of the operating mechanism.

Another feature relates to an improved magnetic assembly for bell ringerswherein a permanent magnet ismounted centrally between and substantially parallel to a pair of electromagnetic cores, with the magnet and cores integrally fastened, as by welding or soldering, to one end of a common yoke which forms part of the main-bell support frame. The permanent magnet at its end remote from the bell has integrally fastened thereto, as by soldering or welding, a pair of perforated or channeled supports in which can be adjustably mounted and permanently anchored, a pair of cooperating armature pivots.

Another feature relates to a bell ringer of the construction above mentioned wherein the bell striker and the retractile spring form an integral part of the armature assembly.

A further feature relates to an improved bell ringer construction wherein the vibratory armature assembly can be initially and accurately adjusted with respect to the electromagnet cores, and can be firmly anchored in place without danger of the gap adjustment being disturbed after long use.

A still further feature relates to the novel organization, arrangement and relative interconnection of parts cooperating to produce a simple and improved bell ringer.

Other features and advantages not specifically enumerated will be apparent after a consideration of the following description and the appended claims.

The invention will be understood more clearly from the following description based on the accompanying drawing, in which,

Fig. 1 is a plan view of a preferred embodiment of the invention.

Fig. 2 is an elevation view of Fig. 1.

Fig. 3 is a plan view of the main bell supporting frame and magnet and yoke unit according to the invention.

Fig. 4 i an elevation view of Fig. 3.

Fig. 5 is a view, partly sectional, but in enlarged form, showing the armature and pivot mounting therefor.

Referring to the drawing, the ringer comprises a mainframe I having a pair of offset end portionsZ and 3, for fastening toa suitable support and a pair of intermediate integral lugs 4, 5, for supporting the usual bells 6 and 1 of known construction. In accordance with the invention, the frame orcasting l, which may be of iron or other magnetic material, has its central portion bent at right angles to form a magnetic yoke 8. Central- 1y fastened to yoke 8, for example by soldering or welding, is a permanent bar magnet 9. Also directly attached toyoke 3, for example by soldering or welding, are two spaced parallel electromagnetic cores l0 and H, terminating at their forwardends in the usual pole faces l2, l3. The magnet 9 hasrigidly fastened thereto at its forwardend and on opposite faces thereof, by welding or soldering, a pair of members [4, [5, which may be in the form of metal blocks, each having a transverse perforation or channel l6, ll, for purposes to be described. Suitably supported on the yoke 8 are the electromagnetic windings or coils I8, I9, of known construction. Fitted into the openings l6 and I1, are a pair of right-angled rigid rods 20, 2|, (Fig. 5). Preferably, although not necessarily, the portions 22 and 23 of these rods are grooved or otherwise roughened where they fit into the openings l6 and H. The rightangled bent portions 24, 25, of these rods are proportioned so that when the rods are fitted into the said openings i6 and I!, there is a gap 26 between the abutting ends. The armature 21 is mounted for pivotal vibration on the rod portions 24 and 25, and for this purpose the armature has bent- back portions 28, 29, into which are staked, or otherwise fitted against clislodgment, bearing members 36, 3|, which receive the pivots 24 and 25 to allow perfect operation of the armature without causing wear of the moving parts. A coupling sleeve 32 overlaps the grooved or roughened ends 33, 34, of the pivots, and this sleeve can be a tight fit or can be pressed so as to prevent relative movement of the ends 33, 34, after the parts have been assembled. The armature also has a vertical extension 35 into which is rigidly fastened the bell striker arm 36 and also a short member 31 to receive and anchor one end of the retractile spring 38. Suitably supported on the electromagnets is an insulator strip 39 to which the connecting lugs 40, 4|, are attached so that current may be applied to the windings l8 and I9 in the usual manner.

The manner of assembly of the ringer mechanism is as follows. The two rods 22 and 23, carrying the armature 21 and the coupling member 32, are inserted and are driven in the respective supports [4 and 15, until the required air gap is provided between the cores I0, I I, and the armature 27. The supports l4 and Hi can then be punched so members 22 and 23 and to maintain the assembled adjustment of the parts. The adjustment of the members 22 and 23 in the members l4 and therefore, accurately and finally positions the entire armature and striker assembly in proper position with respect to the magnets and the bells.

While one particular embodiment has been described herein, it will be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

What is claimed is:

l. A bell ringer comprising a magnetic yoke, a pair of substantially parallel electromagnet cores attached to said yoke, coils on said cores, a permanent magnet located between said cores and also attached at one of its ends to said yoke, and an armature and bell striker assembly unit pivotally mounted on the other end of said permanent magnet.

2. A bell ringer according to claim 1 in which ivots of said armature and bell striker assembly unit are movably mounted so as to permit adjustment towards and away from the ends of said electromagnet cores prior to final anchoring of said assembly unit on said permanent magnet.

3. A bell ringer comprising a magnetic yoke, three substantially parallel magnets attached at one of their ends in spaced relation to said yoke, at least one of said magnets being an electromagnet having a coil; an armature-bell striker as to prevent dislodgment of the.

assembly unit comprising an armature, pivot means on which said armature is mounted for rotation, and a movable mounting for said pivot means on the other end of the central magnet, whereby the gap between the armature and the other two magnets can be adjusted, the lastmentioned means also serving to anchor said assembly unit in final adjusted position.

4. A bell ringer comprising a bell-supporting frame, said frame having a portion bent to form a magnetic yoke, a pair of electromagnets and a polarizing magnet integrally fastened at one end to said yoke in substantially parallel spaced relation, a pair of substantially L-shaped armature pivot rods adjustably anchored on the other end of said polarizing magnet and positioned so that two arms of said rods are in alignment, an armature pivotally mounted on said aligned arms, and a bell striker integrally carried by said armature.

5. A bell ringer according to claim 4 in which the aligned arms of said rods are held in rigid alignment by a coupling sleeve.

6. A bell ringer according to claim 4 in which said pivot rods, said sleeve and said armature and striker bar form a unitary assembly, said pivot rods constituting means to fasten the unit to said polarizing magnet.

OSCAR J. J. BRACKE'.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 288,202 Bowen Nov. 13, 1883 559,274 Fitch Apr. 23, 1896 843,283 Krum Feb. 5, 1907 924,030 Birsfield June 8, 1909 2,209,382 Blattner July 30, 1940 2,217,073 Obergfell Oct. 8, 1940 FOREIGN PATENTS Number Country Date 163,350 Great Britain 1892

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