US2608613A - Mounting for a telephone substation ringer - Google Patents

Description

aNvENToR JOSEPH F. HOUDEK. JR.

ATTORNEY R E G m R we mm RT Je, ,U1

..120 5 umm A 4 A Umm 3 u urb 2 n.6 I 3 I .WWF M64 2 32 Ri l m m. mil l IIT.. G0 I .IBA-w Mw m 3 3 o m .6 W 3 2 5 n W 2 9 m @3. ...l m P lllllllllllll IIL .A

Patented Aug. 26, 1952 MOUNTING FOR A TELEPHONE SUBSTATION RINGER Joseph F. Houdck, Jr., Elmhurst, Ill., assgnor, by mesne assignments, to Kellogg Switchboard and Supply Company, a corporation `of Dela- Ware Original application May 16, 1946, Serial No. 670,265. Divided and this application May 15, 1950, Serial No. 162,067

` Claims.

This appli-cation is a division of my application Serial number 670,265, led May 16, 1946, now Patent No. 2,516,214 of July 25, 1950.

This invention relates to a mounting for a telephone substation ringer. Its principal object is to provide a simple and economical mounting arrangement for ringers which is suiciently flexible that only a minimum of the clatter incident to operation of the armature thereof is transmitted, while holding the ringer suiiiciently rigid that the intended operation thereof is not impaired.

The incidental objects and the features of the invention will become apparent as the description progresses.

Figs'. 1 and 2 are respectively a top View and a rear view of the non-tuned ringer mounted on a supporting base plate.

Fig. 3 is a side sectional view of the device of Figs. 1 and 2 taken generally along line 3--3 of Fig. 1. I

The ringer herein shown may be described as a biased ringer in that the armature is biased to stand normally in association with one electromagnet, as shown. It includes a foundation assembly and parts mounted thereon. The foundation assembly comprises parts 2 and 4 secured together, as by rivets 3. Part 2 comprises a mounting strap of relatively thin and comparatively springy material, While part 4 is a non-magnetic foundation plate to which the other parts going to make up the ringer are attached.

` `The complete ringer is shown mounted on base plate I`, which has raised bosses (Figs. 2 and 3), tapped to receive mounting screws I3. All parts of the ringer are thus held out of direct contact with base plate I, such contact as exists between the ringer and baserplate being by way of the comparatively thin and exible mounting strip (or strap) 2. Direct transmission of clatter, incident to the armature of the mechanism striking the ends of the electromagnets, and incident to the clapper striking the gongs. is materially reduced by this simple illustrated strip mounting.

Foundation plate 4 is provided at the front with arms 5, tapped to receive screws mounting gongs |4 respectively thereto.

The rear portion of plate 4 has a portion sheared end struck up therefrom to provide upstanding wall portion 8, supporting the rearwardly extending horizontal portion 9, ending in tab I0. A hole is provided through part 9 and through the underlying main portion of foundation plate 4 to receive pivot rod 32 for mounting armature 30.

The armature assembly of the device of Figs. l to 3 includes armature 30 which has upper and CII lower ears 3|, pierced to receive pivot rod 32. The upper ear 3| is sheared and struck up from the armature, leaving an opening in the armature through which the rearwardly extending part 9 of foundation assembly 4 freely passes. Armature 30 is provided with non-magnetic coreengaging members 33 applied in the form of rivets. Their well-understood function is to reduce the tendency of the armatureto "freeze in either of its two extreme positions.

The rear end of clapper rod 34 is suitably upset to provide an enlarged portion through which it is secured to the armature, as by riveting. The clapper 35 is mounted on the front end of the rod 34 in a position to strike the gongs I4 alternately as the armature turns back and forth about pivot rod 32.

The illustrated ringer, being of the biased type as noted, is provided with bias spring 36, comprising a round reed forced into a hole in armature 30, the front end entering an eccentric opening in bias-adjusting member 31. Spring 36 thus exerts a normal force on the armature causing it to return to the illustrated position after every use thereof, whereby, when in normal position, it is not affected by current ow in a given direction.

The magnet assembly includes electromagnets having cores 25 and windings 4D, permanent bar magnet 24, and the common yoke 2| of magnetic material.

The magnetic yoke 2| ha-s a horizontal part, which overlies foundation plate 4 in assembled position, and a vertical part which is pierced to receive the shouldered front end of electromagnet cores 25. These cores may be held in part 2|, as by the illustrated spring washers, or speed nuts 26, each of which has inwardly extending parts which snap into an annular groove inthe reduced end portion of its core 25. `Core-s 25 are thus held yieldingly, whereby sliding of the assembly is not materially affected by minor displacement of the location of receiving holes l in the upstanding rear portion 8 of foundation plate 4.

The front end of permanent bar magnet 24 enters an accurately sized opening in the upstanding portion of yoke 2|. This opening is produced by a shearing action which provides the rearwardly extending central tab 23, which underlies the front end of magnet 24. Parts 23 and 24 are secured rigidly together as by welding.

Yoke 2| is provided with a front tab 22which is tapped and threaded to receive the reduced forward portion 42 of stroke-adjusting screw 4I. The main upstanding portion of yoke 2| is pierced 4 clapper assembly is supported to turn, and means supporting the end portions of said flexible mounting strip on said base member with the remainder of the strip out of contact therewith, the ringer being ilexibly suspended on said strip out of direct contact with the base member.

of bifurcate spring member 38, which holds part 31 in its assembled position, and retains part 31 by friction in its desired rotational position of adjustment. The enlarged rear portion of Vbias-adjusting member 31 is provided with a longitudinal off-center opening receiving the forward end of bias springV 36.V By a rotation of member 31 through 180 degrees, the front end*4 of bias spring 36 is carried from an extreme left position of maximumV bias tension to an extreme right position of minimum bias tension. Ordinarily, some intermediate position is employed.

The rear end of cores 25 are received in openings Il in upstanding portion 8 of foundation plate 4, and they may protrude somewhat to the rear of portion 8, as shown in Figs. 1 and 2. Additionally, the rear end of bar magnet 24 is received on opening in upstanding part 8, such opening beingpreferably rather accurately sized to serve as the principal rear guide for the slidable magnet assembly, keeping in mind that cores 25 of the electromagnets' are effectively articui lated, with respect to each other and to the magnet, by the resilient mounting arrangement including retaining parts 2S. It will be observed that the rear end of bar magnet 24 ends slightly short of the end of cores 25, whereby the bar magnet does not directly contact armature 30 in anyl position of stroke adjustment, whereby the intended movement of the armature cannot be interfered with incident to the sliding of the magnet assembly for stroke adjustment.

Accurate and readily controlled longitudinal positioning of the slidable magnet assembly, according to the armature stroke desired, is obtained by the illustrated compound stroke-adjusting screw having a threaded section 4I and a reduced threaded section 42. Section il is threadedly received in an opening in upstanding tab 6, formed integrally with foundation plate li, vwhile the reduced portion 42 is threadedly received in upstanding tab 22, formed integrally with magor steeply pitched, threads; the other part is pro- .1.;

vided With ne, or mildly pitched, threads. It is preferable that the larger section GI be provided with the coarse threads, and that the smaller section 42 be provided with the line threads.

Lock nut d3 retains screw H in its desired position of adjustment, such adjustment being performed as detailed in the parent application.

Iclaim:

l. In combination, a base member, a ringer including gongs and a turnably supported armature-clapper assembly consisting of an armature and a clapper supported thereon, and including electromagnetic means operatively associated with said assembly for causing said clapper to strike said gongs, a flexible mounting strip and means securing the intermediate portion of it to the ringer with its shortest dimension generally parallel to the-axis about which the armature- 2. In combination, a base member, a ringer including gongs and a turnably supported armature-clapper assembly consisting of an armature and a clapper supported thereon, and including electromagnetic means operatively associated withsaid assembly for causing said clapper to strike said gongs, a flexible mounting stripand means securing the intermediate portion of it to the ringer outside the confines of the space occupied by said armature-clapper assembly during 'operation thereof, and means supporting the end portions of said flexible mounting strip on said base member with the remainder of the strip out of contact therewith, the ringer being exibly suspended on said. strip out of direct contactI with the base member.

3. In combination, a base member, a Vringer including gongs and a turnably supported armature-clapper assembly consisting of an armature and a clapper supported thereon, and including electromagnetic means operatively associated with said assembly for causing said clapper to move reciprocally to strike said gongs, a flexible mounting strip and means securing the intermediate portion of it to the ringer, said ringer being constructed so that a given plane exists between said ringer and strip on one side of which said ringer is wholly disposed, and means supporting the end portions of' said flexible mounting strip on said base member with the remainder of the strip out of contact therewith, the ringer being flexibly suspended on said strip out of direct contact with the base member.

4. In combination as set forth in claim 3, said pla-ne being disposed so that motion of said armature-clapper assembly is generally parallel thereto.

5. In combination, a base member, a ringer including as elements gongs and a turnably supported armature-clapper assembly consisting of an armature and a clapper supported thereon, and including electromagnetic means operatively associated with said assembly for causing said clapper to strike the gongs, va foundation plate of given thickness, means supporting said ringer elements on said plate, a flexible mounting strip substantially thinner than said foundation plate, means securing the intermediate portion of the strip to said foundation plate. and means supporting the end portions of said iiexible mounting strip on said base member with the remainder of the strip out of Contact therewith, the ringer being flexibly suspended on said strip out of direct contact with the base member. JOSEPH F. HOUDEK, JR,

' appearances Crrnn The following' references are of record in the le of this patent:

UNITED STATES PATENTS

Images