US2487385A - Mounting and operating means for radio tuning units - Google Patents

Description

1949 w. A. SCHAPER MOUNTING AND OPERATING MEANS FOR RADIO TUNING UNITS Filed March 15, 1947 HII ll] 14 1:4

INVENTOR. W/ LL /AMA.5CH/7PER.

Patented Nov. 8, 1949 MOUNTING AND OPERATING MEANS FOR RADIO TUNING UNITS William A. Schaper, Cicero, Ill., assignor to The Mantle Lamp Company of America, Chicago, 111., a corporation of Illinois Application March 15, 1947, Serial No. 734,888

17 Claims. (Cl. 171-242) The invention pertains to a structure providing simple and inexpensive mounting means for the several parts involved in a radio tuning unit by means of integral lugs and tongues punched and formed from a single sheet metal plate.

Said invention also provides improved operating mechanism for the movable parts of said radio tuning unit; in addition the invention provides an improved form for supporting a drum for rotary movement on said mounting plate, together with an endless flexible band extending from said drum to operate said movable parts, the support of the drum from the mounting plate being complete whether an operating shaft is associated with said drum or not, to the end that the complete tuning units of the invention may be manufactured and ready for use, and subsequently assembled in any one of different desired associations as may be required in different kinds of complete radio apparatus. Further objects, advantages and capabilities will later more fully appear.

The invention will be best understood by reference to the accompanying drawings showing preferred embodiments thereof in which:

Fig. 1 shows in plan view a complete tuning unit in accordance with the invention,

Fig. 2 shows in side elevation the tuning unit illustrated in Fig. 1,

Fig. 3 shows in end view the tuning unit illustrated in Fig. 2,

Fig. 4 is a fragmentary plan view on an enlarged scale, of a portion of the mounting plate illustrated in Fig. 1, with the parts of the tuning unit removed therefrom,

Fig. 5 is a sectional view of the plate on the line 5-5 of Fig. 4,

Fig. 6 is an end view looking toward the right hand end of Fig. 5,

Fig. 7 is a sectional view, to an enlarged scale, on the line 1-1 in Fig. 2,

Fig. 8 shows in a view similar to Fig. 2 the mounting of a plurality of tuning units constructed in accordance with Figs. 1 and 2 and mounted for simultaneous operation by a single operating shaft,

Fig. 9 is a section on the line 9-9 of Fig. 2.

Similar numerals refer to similar parts throughout the several views.

As shown in' Fig. 1, a single mounting plate I of fiat sheet metal is employed, which has punched and formed therefrom upwardly extending guide posts 2, 3, I and 5 around which a flexible band 6 of suitable material, for example its ends secured to a rotary drum I, a tensioning spring 8 being secured to the drum and engaging the ends of said band to exert a desired tension thereon. The hub 9 of the drum engages a sleeve I0 extending through the plate I with a free-turning fit, which sleeve below the plate I is headed as shown in Figs. 2 and 'l to prevent appreciable axial movement of the drum relatively to the plate. The sleeve and the drum are secured together, for example by a soldered connection II (see Fig. 1) to prevent separation of the sleeve from the drum and movement of the sleeve relatively to the drum. Sleeve III is preferably fixed to rotate with shaft S, but the drum is operatively rotatable on plate I regardless of whether or not a shaft is used therewith. As shown in Fig. 2, the band 8 is supported in a plane just above and parallel with the plate I, the guide posts 2-5 each having formed in its active surface a groove to slidably receive and guide the band in its movement thereover.

As shown in Fig. 1, coil forms I2 and I3 are mounted on the plate I, by means below described, and adjacent and parallel with the band 8, ferromagnetic cores I4 and I5 being provided for axial movement in the coil forms I2 and I3 and securely connected by sheet metal clips I6 and II with the endless band 6 to move therewith, as later more fully explained. The coil forms I2 and I3 are preferably located on diagonal corner portions of the mounting plate I adjacent opposite sides of the band 8, so that turning the drum 1 simultaneously moves the cores II and I5 equal amounts and in opposite directions relatively to the coil forms I2 and I3, respectively.

The manner of supporting the drum I from the mounting plate I by means of the headed sleeve I0, and the mounting of this sleeve on shaft S, is more clearly shown in Fig. 7. Each of the coil forms I2 and I3 is supported on plate I by a U-shaped mounting member I 8 having a fiat base portion a, parallel with plate I, and at each end outwardly extending members I8 and 20 the free end of each of which is formed with a central notch 2I to receive a complementally notched bracing bar 22. The coil forms are fixedly mounted in holes 23 and 24 in the outwardly extending members It and 20 of the mounting members, there being one of these holes in each end thereof.

Novel means are provided for quickly, easily, removably and securely mounting the mounting members on the plate I, in which the plate I is formed at suitably spaced apart locations with a cord or flexible wire, extends, which band has T-shaped slits or cuts, the base end of the middle top cross bar of the T being spaced from the plate a distance equal to the length of the middle bar of the T the end of the middle bar away from the cross bar being integrally connected with the plate. This will best be understood in Figs.

4-6, in which the cross bar of the T is indicated at 25'and the middle bar thereof at 2B. The hole from which the cross bar was punched is indicated in Fig. 4 at 27 and the hole from which the middle bar was punched at 23. When a mounting member 58 is to be fixed on only one 5 surface of plate i in one of the diagonal corners thereof, or elsewhere as desired, a pair of said metal Ts will be punched out from the plate and pushed outwardly from the plate on the side desired, as seen at the upper side of the plate in Figs. 5 and 6. 7

When a mounting member is to be fixed at both sides of the plate, another pair of Ts will be punched out to extend on the other side of the plate as seen at the bottom side of the plate in Figs. 5 and 6. As many of these pairs of Ts may be formed as desired in the late in any desired locations, and the Ts of each pair be spaced apart any desired distance. The height of the middle bar of each of said Ts will preferabl be approximately the thickness of the base a of the mounting member I8 so that said thickness may be snugly pushed under the ends of the cross bars of each pair of Ts. To enable this,

said mounting member base a is formed with a pair of T-shaped slots as seen in Fig. 9 at 29. As will be understood the wider portions of the slots 29 will register with the cross bars of the Ts when being applied to the plate, and when said pair of T cross bars has been inserted theremember on the plate.

As will be understood as many pairs of these complemental T formations may be formed as desired, for mounting any desired number of mounting members and coil forms on the plate.

In Fig. 1 two mounting members, with a coil form in each, are shown on the upper surface of plate I. In Fig. 2, said two are shown on the upper surface of the plate and one mounting memher and coil form on the lower surface. Figs.

5 and 6 show how a mounting member may be arranged for on both sides of the plate. From this it will be seen that various arrangements and locations of mounting members and coil forms may be provided for in any desired loca- As seen in Figs. 1 and 2, the plate I at one end is formed with an integral mounting flange 30 extending upwardly at approximately right angles to the plate and formed at each end with a rectangularly extending locating lug 3| seated in an opening 32, said holes 32 being formed in any desired supporting member 33 upon which the radio tuning unit is mounted. Flange 30 at approximately its middle position is formed with a threaded hole receiving the inner threaded end 7 member is rotated to tighten the flange 30 against the supporting member. The projections 3! and the screw member 34 are positioned a sufficient distance above the plane of plate I to afford the necessary stability of the plate and the parts mounted thereon when the screw member is tightened in the flange and supporting member. By this arrangement only a single screw is required to mount the plate and associated parts on the support.

Plate l at suitable locations is provided with any desired number of pairs of tongues 36 and 3V bent upwardly at preferably right angles from the plate, suitable slits being formed in the plate from which said tongues are bent so that the tongues are integrally connected at one end with the plate. To these tongues, trimmer capacitors 38 and 39 are secured in any desired manner,-

as shown in Figs. 1, 2, 3 and 8. These capacitors may be located on plate l in positions best accommodated to the other associated parts on the plate.

As seen in Fig. 1 the coil forms, i2 and I3, and their axially movable cores i4 and [5, are positioned on opposite sides of the band 6, and on diagonally opposite corners of the plate, as a result of which rotation of drum I will cause movement of the cores in opposite directions and from opposite ends of the coil forms. The connection of the outer ends of the clips l6 and H with the band 6 is positive so that movement of the band will cause corresponding movement of the cores, but the movement of the cores will be in opposite. directions with relation to each other.

As pointed out earlier herein, coil forms may be mounted on one or both sides of plate I. Fig. 2 shows two coil forms on the upper surface of the plate and one on the lower'surface, the latter being indicated at 40, and being mounted in a mounting member N3 of the same construc-- tion as those previously described. Coil form 40 has axially movable therein a core 4! to which is fixed a sheet metal clip 42 whose laterally projecting end portion passes through a longitudinal slot 43 formed in plate I to extend parallel with band 6. After passing through slot 43 the end portion of clip 42 is fixed to band 6 so as to at all times move therewith when the drum 1 is rotated. This arrangement of parts enables simultaneous axial movement of the cores even when mounted on opposite sides of the plate. In the mounting of Fig. 2, the cores l4 and 4| move in the same direction and core IS in the opposite direction, but all actuated by a single drum.

In Fig. 8 I have shown two plates spaced apart, but both mounted in the same manner as described earlier herein, to the supporting mem ber 33. To give added rigidity to the form of tions on either or both sides of the plate. 30

Fig. 8 the plates I are provided at diagonally opposite corners with ears 44, each with an opening to receive an elongated bolt having at its ends nuts 45 which when tightened clamp brace members 46 rigidly between the plates. In this form there are mounted two coil forms and the other associated parts on the upper surface of the upper plate, arranged as shown in Fig. 1 and on the upper surface of the plate of Fig. 2. A similar arrangement of coil forms and associated parts are shown on the upper surface of the lower plate of Fig. 8. The drum on the upper plate and the drum on the lower plate are in alignment so that a single shaft S may operate both drums simultaneously. The operation of the parts on the upper surface of each of the plates of Fig. 8 is the same as that described in connection with Fig. 1. As seen from the foregoing. I have provided mounting means for radio tuning units, capable of various combinations and arrangements of units, and all operable simultaneously from a single shaft, or operable as single or multiple units actuated by a single drum regardless of whether or not a shaft is used for rotating the flat sheet metal mounting plate having integral band guiding posts formed therefrom and projecting from the surface of said plate, a band drum mounted on said plate for rotary movement, a flexible band extending under tension around said posts and having its ends connected with said drum, coil forms supported by said plate parallel with said band, ferromagnetic cores movable axially in said coil forms, connecting clips extending from said cores and secured to said band, whereby rotary movement of said drum simultaneously moves said cores axially relatively to said coil forms, said plate havingintegral lugs formed therefrom and securing said coil forms to said plate, and a rotary shaft connected with said drum.

2. Mounting and operating mechanism for radio tuning units, including in combination a fiat sheet metal mounting plate having integral band guiding posts formed therefrom and projecting from the surface of said plate, a band drum mounted on said plate for rotary movement, a flexible band extending under tension around said posts and having its ends connected with said drum, coil forms supported by said plate parallel with said band, ferromagnetic cores movable axially in said coil forms, connecting clips extending from said cores and secured to said band, whereby rotary movement of said drum simultaneously moves said cores axially relatively to said coil forms, said plate having integral lugs formed therefrom and securing said coil forms to said plate, and a rotary shaft connected with said drum, the mounting of said drum including a headed sleeve extending through said plate for rotary movement and into and secured to the hub of said drum, said sleeve having a bore for receiving said shaft and for connection therewith, whereby the mounting of said drum on said plate is effected by said sleeve regardless of the presence of said shaft in said sleeve.

3. Mounting and operating mechanism for radio tuning units, including in combination a fiat sheet metal mounting plate having integral band guiding posts formed therefrom and projecting from the surface of said plate, a band drum mounted on said plate for rotary movement, a flexible band extending under tension around said posts and connected with said drum, coil forms supported by said plate parallel with said band, ferromagnetic cores movable axially in said coil forms, connecting clips extending from said cores and secured to said band, whereby rotary movement of said drum simultaneously moves said cores axially relatively to said coil forms, said plate having integral lugs formed therefrom and securing said coil forms to said plate, and

a rotary shaft connected with said drum, said coil forms being mounted on diagonally opposite portions of said plate and said cores having movement from opposite ends of said coil forms, and said cores having connection with opposite sides of said band, whereby rotary movement of said drum simultaneously moves said cores in opposite directions relatively to said coil forms respectively.

4. Mounting and operating mechanism for radio tuning units, including in combination a flat sheet metal mounting plate having integral band guiding posts formed therefrom and projecting from the surface of said plate, a band drum mounted on said plate for rotary movement, a flexible band extending under tension around said posts and connected with said drum, coil forms supported by said plate parallel with said band, ferromagnetic cores movable axially in said coil forms, connecting clips extending from said cores and secured to said band, whereby rotary movement of said drum simultaneously moves said cores axially relatively to said coil forms, said plate having integral lugs formed therefrom and securing said coil forms to said plate, and a rotary shaft connected with said drum, said plate having an integral mounting flange and integral locating lugs extending from said flange, whereby a single mounting screw is required to mount said mounting plate on a desired support.

5. Mounting and operating mechanism for radio tuning units, including in combination a flat sheet metal mounting plate having integral band guiding posts formed therefrom and projecting from the surface of said plate, a band drum mounted on said plate for rotary movement, a flexible band extending under tension around said posts and connected with said drum, coil forms supported by said plate parallel with said band, ferromagnetic cores movable axially in said coil forms, connecting clips extending from said cores and secured to said band, whereby rotary movement of said drum simultaneously moves said cores axially relatively to said coil forms, said plate having integral lugs formed therefrom and securing said coil forms to said plate, and a rotary shaft connected with said drum, two of said coil forms being on opposite sides of said mounting plate, said plate having a slot therethrough to receive the connecting clip extending from the core on the side of said plate remote from said band.

6. Supporting and operating means for a radio tuning unit including a coil form and a core axially movable in said coil form to effect permeability tuning, which supporting and operating means comprises a mounting plate having bandguiding posts struck out of said plate to extend outwardly therefrom to slidably guide a band thereover, ears punched and bent out of said plate to project from the same surface thereof as said posts, a coil form mounting member having a base portion formed with slots removably and slidably mounted over said ears, a band drum rotatably mounted on said plate, a flexible band secured to said drum and slidably passing tautly around said posts, and an angular connecting clip secured to said band and for connection with a core axially movable in a coil form to be carried by said coil form mounting member, whereby rotation of said drum moves the band around said posts and simultaneously may move a core in a coil form.

enemas 7. Supporting and operating meansfor a radio tuning unit as claimed in claim 6, in which said drum has one face rotatably mounted on one face of the plate, said plate having an opening concentric with the drum, a member fixed to the drum to extend through said opening, said last mentioned member having a dense contacting the other face of the plate to rotatably secure the drum to the plate.

8. Supporting and operating means for a radio tuning unit as claimed in claim 7,including a shaft extending through said last mentioned member and said drum.

9. Supporting and operating means for a radio tuning unit including coil forms and cores axially movable in said coil forms to effect permeability tuning, which supporting and operating means comprises a fiat mounting plate having a plu= rality of band-guiding posts struck out from the plate and havin curved guiding surfaces, a band slidably passing around one side of said curved surface of each post so as to have two parallel sides, a pair of coil form mounting members on said plate one on one side and one on the other side of said parallel band sides for supporting coil forms with cores respectively and axially movable therein, a drum rotatably mounted on the plate, the two ends of the band being fixed to the drum, and an angular connecting clip for connection with each core, each of said clips being fixed at one end to the band and for connection at its other end with a core axially movable in a coil form to be supported by one of said coil form mounting members. 1

10. Supporting and operating means for a radio tuning unit as claimed in claim 9, in which integral ears are struck up from the plate, and said coil forms are removably connected to the plate by said ears.

11. Supporting and operating means for a radio tuning unit as claimed in claim 10, in which a further coil form mounting member is secured to the other side of the plate for supporting a coil form with a core axially movable therein, said plate having an elongated slot, and an angularly extending connecting clip fixed at on end to the band and extending through said slot for connection at its other end with a core axially movable in a coil form to be supported by said further coil form supporting member, whereby cores of coil forms on opposite faces of the plate may be operated by the same band.

12. Supporting and operating means for a radio tuning unit including coil forms and cores axially movable in said coil forms to effect permeability tuning, which supporting and operating means comprises a flat mounting plate having guide posts, coil form mounting members mounted on the plate for supporting coil forms with cores respectively and axially movable therein, a drum rotatably mounted on the plate on one face, a tubular hub in said drum, a sleeve fixed in said hub and extending through an opening in the plate, a flange on said sleeve rotatably bearing on the other face of the plate, a flexible band passing around said drum and said posts, and clips connected with said band and for connection with cores axially movable in coil forms to be supported by said coil form mounting members.

13. Supporting and operating means for a 70 radio tuning unit as claimed in claim 12, in which said posts are struck up from the plate and curved on the side over which the band passes.

14. Supporting and operating means for a radio tuning unit, as claimed in claim 12, in which a shaft is mounted in the sleeve for rotating the drum.

15. Supporting and operating means for a radio tuning unit including coil forms and cores axially movable in said coil forms to effect perme-- ability tuning, which supporting and operating means comprises a fiatsheet-metal mounting plate having a pair of integral headed ears struck up from one face thereof, a pair of integral headed ears struck up from the other face thereof, a coil form mounting member having slots passed over the headed ears on one face of the plate, a coil form mounting member similarly mounted on said ears on said other face of the plate, said coil form mounting members being adapted to respectively support coil forms with cores axially movable therein, a drum rotatably mounted on the plate, guide posts, a flexible band on said drum and slidable over said posts, and angular clips connected with said band and for connection with cores axially movable in coil forms to be supported by said coil form mounting members.

16. Supporting and operating means for a radio tuning unit as claimed in claim 15, in which said plate is formed with an elongated slot, and one of said clips passes through said slot.

17. Supporting and operating means for a radio tuning unit including coil forms and cores axially movable in said coil forms to effect permeability tuning, which supporting and operating means comprises a pair of spaced apart mounting plates each having integral headed ears struck up from a face thereof, a plurality of coil form mounting members secured to said ears on each plate, a drum on each plate, each drum being rotatably mounted on its plate and having a headed sleeve the head of which is rotatably mounted on the other side of the plate, the coil form mounting members on each plate being adapted to support coil forms with cores respectively and axially movable therein, a plurality of guide posts, a flexible band and clips connected with said band and for connection with cores axially movable in coil forms to be supported by 7 said mounting members, and a single shaft on which both of said drums are mounted.

WILLIAM A. SCI-IAPER.

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

UNITED STATES PATENTS Number Name Date 881,511 Waters Mar. 10, 1908 1,355,462 Francis Oct. 12, 1920 1,533,209 Radu Apr. 14, 1925 1,824,708 Davis et al Sept. 22, 1931 1,867,206 Brady July 12, 1932 1,935,354 Dressel Nov. 14, 1933 2,198,354 Kaufman Apr. 23, 1940 2,226,822 Kirk Dec. 31, 1940 2,260,985 Benton Oct, 28, 1941 2,272,433 Schaper Feb. 10, 1942 2,389,986 Koch Nov. 2'7, 1945 FOREIGN PATENTS Number Country Date 461,092 Great Britain Feb. 10, 1937

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