US2489392A

US2489392A - Coil form mounting

Info

Publication number: US2489392A
Application number: US665049A
Authority: US
Inventors: Wood Frank
Original assignee: Zenith Radio Corp
Current assignee: Zenith Electronics LLC
Priority date: 1946-04-26
Filing date: 1946-04-26
Publication date: 1949-11-29
Anticipated expiration: 1966-11-29

Description

Nov. 29, 1949 F. WOOD I COIL FORM MOUNTING Filed Aprfil 26, 1946 FRANK W000 mvsuron.

H/s Arron/vs).

Patented Nov. 29, 1949 COIL FORM MOUNTING Frank Wood, Elmhurst, 111., assignor to Zenith Radio Corporation, a corporation of Illinois Application April 26, 1946, Serial No. 665,049

6 Claims.

The present invention pertains in general to coil form mountings and in particular to an improved mounting arrangement wherein a coil form mounting member is formed as an integral part of a radio receiver chassis or the like.

In the past, coil forms, such as those used in radio receivers, have generally been mounted by means of twist or spade lugs which are riveted to the coil form and pass through openings in the chassis to which the coil form is secured by twisting the lugs or threading nuts thereon. It is an object of the present invention to pro- .vide an improved mounting arrangement which eliminates the need for attaching lugs or the like to the coil form, whereby more economical manufacture of apparatus employing such coil forms is obtained through elimination of certain manufacturing operations and reduction of coil form spoilage occurring therein.

A further object ofthe invention is to provide an improved arrangement for securing a coil form to a chassis of sheet material without the need for any securing means which extends through the chassis, whereby greater freedom in mounting parts on the side of the chassis opposite the coil form is obtained.

The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The present invention itself, both as to its organization and manner of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawing in which:

Figures 1, 2 and 3 disclose one method of forming a mounting member, or lug, from a chassis of sheet material in accordance with one embodiment of the invention,

Figure 4 is a perspective view of a coil form mounted by means of the member, or lug, disclosed in Figures 1 to 3,

Figures 5 and 6 are elevational views of coil forms mounted in accordance with modifications of the invention,

Figures 7 and 8 disclose an alternative form of mounting member,

Figures 9 and 10 disclose side and elevational views, respectively, of a further modification of the invention, and

Figure 11 discloses an alternative form of the mounting members disclosed in the preceding figures.

In the embodiment of the invention illustrated in Figure 4 there is shown a portion of a chassis I of sheet metal or the like, from which a mounting member, or lug, 2 has been formed perpendicular and parallel to the plane of the chassis. The parallel portion of the lug 2 extends through opposed slots in a tubular coil form 3. The openings are preferably diagonally opposed whenthe coil form is cylindrical. The free end of lug I is formed overto engage the coil form-3,-thereby securing it firmly in place.

It is preferred that the mounting lug 2 be formed from a sheet metal chassis in order to simplify manufacturing operations and to obtain the utmost economy in manufacture. Figure} discloses an outline which is die-cut in a sheet metal chassis I. The die is preferably arranged also to form the cut away portion along the dotted lines of Figure 1 into the shape disclosed in Figures 2 and 3. Coil form 3 is passed ovelj the portion of lug 2 whichis parallel to the chassis l until the coil form engages a shoulder formed near the fixed end of the lug 2, as illustrated in Figure 4. The free end of lug 2 is then formed perpendicular to the plane of the chassis I in order to prevent movement of coil form 3 relative thereto. The free end of the lug 2 preferably has a weakened neck portion 4 formed therein so that it may readily be formed over without damage to the coil form.

.While chassis for radio receivers and the like are generally mad-e of sheet metal, the invention is not limited to the use of such material. For example, the chassis may be molded of a phenolic resin in'which case mounting members, such as 2, may be molded therein. When the mounting members are formed of material which is not ductile a dab of cement or the' like may be ap plied to the tip thereof, after the coil form has been placed thereover, rather than bending the tip of the mounting member. V

The cantilever portion of the mounting member need not be parallel to the chassis. In Figure 5 there is shown a section of a supporting sheet or chassis, 5 having a mounting member 6 formed therefrom, which member is formed closer to the chassis 5 at the free end of the member than at the fixed end thereof. A coil form I, having diagonally opposed openings therein which are spaced at different distances from one end thereof, is placed over the cantiliver portion of member 6 by springing the latter away from the chassis. After the coil form has been placed over the mounting member, it is allowed to spring back in place to press the lower end of coil form I firmly against the chassis 5. The slope of member B may be relied on to prevent movement 01,

3 coil form 1 relative thereto, or, if desired, a dab of cement 8 or the like may be applied to the tip of member 6.

In Figure 6 there is shown a section of supporting sheet, or chassis, 9 having a mounting member 10 formed therefrom, which member is formed farther from the sheet 9 at the free end of the member than at the fixed end thereof. This arrangement is-,desirable since it: allows a, coll form ll to be-placed over the cantilever portion of the mounting member with the greatest of, ease. The tip of member ID is subsequently formed upwardly to engage one side oiiformllv and thereby secure it firmly in place.

In some instances it is not"permissible-to have" openings in a radio receiver chassis. In such cases a mounting member, sueh;as-.-that=,disclosed; in Figures '7 and 8, may be employed in, lieu of that previously described. The mountinglug' 12'' is formed in a shape similar to that disclosed in the preceding figures but has a portion 7 formed parallel to'achassis I3, and adjacent thereto, at the fixedfi end ot thes lug. l2. Thisportion of the -lug I2 is preferably attachedv to the chassis Baby spot welds;

Radi'o receiver chassis usually have-several fiat portions formed: perpendicularly to eachother. Itiswthereiore possible tov form a mounting lug from one of a pair of perpendicuiar flat portions,

or walls; inorder to securea coil form to the other oneof thefiat portions; or walls. Such an arrangement h-as been illustrated in Figures #9 and lo' whereinamounting lug l5--is-formedfrom a sidewall of a chassis lfi parallel to a,-- horizontal portion'-ofi 'such chassis. A- coil form ['1 is secured, with one end thereof in abutment with thehorizontalportionof the chassis-l6; in-the same'manner as described heretofore.

' In Figure 1 1- a-modified formioi the-mounting lugs previouslydescribed hasbeen shown; In this-modification the entire tip endof' th'elug has been reduced-inwidth rather than merely provid-inga narrow constricted portion near the tip; In the appendedclaims it is in-tendedj'th'at the-term neck-portion apply-to either of the forms" of' tip-disclosed herein;

While particular embodiments of the present invention have been shown and'described; it ,will be obvious to thoseskilled in the art that changes and-modifications may be made withoutv departing from this invention in its broader aspects, andltherefore', the aim" in the appended-claims is to cover all such'changesandmodificationsasf all "within the ;true spirit and: scope a of this invention.

I'claimt" I-. Incombination, a metallic sheet, atub'ular coil form having one end abutting said sheet, said form havingopposedfopenings therein spaced, at equal distances from said'one end, and av member extending ironrsaid; sheet and haVing a, portion extending parallehthereto, said member having -asheulder formed therein at the fixedfend of the parallel portion and having a neck portion formed therein at the free end of the parallel portion, the parallel portion of said member extending through said openings with said shoulder engaging one side of said form and having said neck portion formed over to engage the opposite side of said form.

2. In combination, a supporting sheet, a tubular coil form having one endgabutting said-sheet, said form having openings therein-- spaced from said one end, and a member extending from said sheet and having a cantilever portion, said member havingsanshoulder formed therein at the fixed end of the cantilever portion and having a Weak- M enedsection at thefree end of the cantilever portion, the cantilever portion of said member extending through said openings with said shoulder engagingeone side of said form and having said weakened section formed over to engage the opposite side of said form.

3. In -combination, a supporting sheet, a tubular coil form having one end abutting said sheet, said form having opposed openings therein spaced at equal distances from said one end, and a member formed from said sheet and having a portion extending parallel thereto, the parallel portion of said memberextending through said openings to firmly secure the form to said sheet.

4; In combination, a supportingsheet, a tubular coil form having one end abutting said sheet, said form having openings therein spaced from said oneend, and a member-formed 'from' said sheet and having a cantilever portion extending through said openings to firmly secure the form to said sheet.

5. In combination, a supporting sheet, a tubular coil form having one-end abutting, said sheet, said form having openings therein spaced from said one end, andamember extending from said sheet and having a cantilever portion extending through said openings tofirmly secure the form to said sheet.

6. Incombination, a supporting sheet, a tubular coilforin having oneend abutting said sheet, a member extending from said sheetand having a. cantilever, portion extending through said coil form, and meansat the free end of the cantilever portion for preventing movement oilsaid coil form relative to said member.

FRANK WOOD.

REFERENCES" CITED The following referencesare of,-record in the