US3017547A

US3017547A - Solenoid

Info

Publication number: US3017547A
Application number: US764992A
Authority: US
Inventors: Hollis W Jencks
Original assignee: Detroit Coil Co
Current assignee: Detroit Coil Co
Priority date: 1958-10-02
Filing date: 1958-10-02
Publication date: 1962-01-16
Anticipated expiration: 1979-01-16

Description

H. W. JENCKS Jan. 16, 1962 SOLENOID Filed Oct. 2, 1958 INVENTOR. #0441: w. vavcw; BY

A TTORNEYJ of FIG. 4.

United States PatehtQfifice 3,017,547 Patented Jan. 16, 1952 3,017,547 SOLENOID Hollis W. Jencks, Ferndale, Mich, assignor to Detroit Coil Company, Ferndaie, Mich., a corporation of Michigan Filed Oct. 2, 1958, Ser. No. 764,992 4 Claims. (Cl. 317-191) This invention relates to an improved solenoid.

. More particularly it relates to improvements in the construction of a solenoid whereby the component parts may be quickly assembled together.

An object is the provision of a solenoid which includes a stator portion, a coil and bobbin assembly portion, an armature portion, and holding means capable of being detachably coupled with the stator and coil assembly so as to quickly releasably secure the component parts of the solenoid structure together.

Another object is the provision of a solenoid as hereinvabove described of simple, inexpensive construction which ends itself to easy and quick assembly and disassembly of its component parts without the use ofscrews, bolts, or the like.

A furtherobject is the provision of a solenoid wherein there is a ;-shaped stack or stator part, abobbin and coil assembly part removably receivable between the arms of the C-shaped stator, a T-shaped armature part removably associated with the stator and coil for working reciprocation, and releasable improved securing means capable of being quickly connected and/or disconnected with the stator and coil assembly to hold the coil in place.

A meritorious assembly is disposed bet-ween the two arms of the C- shaped stator seated upon the bight portion of the stator, and when so seated the coil and bobbin assembly is spaced from overhanging end portions of the stator arms, and the securing means is in the form of a U-shaped spring clip which is adapted to resiliently grip the arms of the stator and a portion of the bobbin assembly, and said spring clip has parts received between the overhanging ends of the stator arms and the adjacent end of the bobbin assembly, which results in holding the bobbin assembly against the bight of the stator, and which parts are so held in place between the overhanging ends of the stator arms and said end of the bobbin assembly by the tension of the spring clip, as hereinafter more specifically set forth.

Other objects, advantages, and meritorious features will more fully appear from the following description, claims, and accompanying drawings wherein:

FIG. 1 is a side elevation of the solenoid assembly;

FIG. 2 is an elevation similar to that of FIG. 1 except that a part of the assembly is broken away to show the construction more clearly;

FIG. 3 is a transverse sectional view taken on the line 3-3 of FIG. 1;

FIG. 4 is a plan of a spring clip which is used to hold the coil and bobbin assembly in position within the stator;

FIG. 5 is a sectional view taken on the line 55 In the drawings the solenoid or electromagnetic device comprises a stator or frame in the form of a core struc ture generally indicated at and having a substantially C-shaped configuration. This core is formed of a multiplicity of laminations as is conventional practice. The C-shaped configuration of the core exhibits two opposed arm portions 12 connected at one end by the bight portion 14. The upper ends of the arms are formed to project toward each other as shown in FIGS. 1 and 2. These overhanging upper end portions of the arms are feature is that the coil and bobbin,

indicated as 16 and terminate spaced from each other providing therebetween an armature passageway.

The inner surface of the bight 14; of the stator is provided with a lug portion 18 over which the bobbin and coil assembly is seated as illustrated particularly in FIG. 2. A passageway 20 extends through the bight of the stator and through this lug portion 18 whereby an operating element such as a rod might be extended therethrough to be actuated by the armature of the solenoid.

Removably receivable within the space between the arms 12 of the stator is an energizing coil and bobbin assembly. This assembly is slidable as a unit from either side to a position between the two arms of the stator. The coil and bobbin assembly includes a spool or bobbin 22 which may be formed of suitable insulating material and about which the coil 24 of fine wire is wound. A liner 26 of thin sheet metal or other suitable material extends through the interior of the bobbin as shown and projects thereabove as indicated at 28 into the space between the overhanging end portions 1d of the stator arms 12.

, A generally T-shaped armature having a shank portion 30 and a head portion 32 is provided. The shank portion 30 is received between the overhanging end portions -16 of the arms and into the interior of the passageway through the bobbin for reciprocation therein. This armature may be built up of a multiplicity of thin laminations of' magnetic material in a manner well known. The head 32 of the armature is shown as seating upon the upper ends 16 of the arms 12.

To hold these three parts of the magnet together, I provide a spring clip indicated generally as 36. This spring clip is U-shaped in configuration having complementary opposed arms 38 connected at one end by a bight portion 40. The opposite and free ends of the arms are outspread at indicated in FIG. 4 for a purpose hereinafter set forth. The two arms are shaped so as to exhibit tWo pairs of oppositely disposed inwardly projecting protuberances. ()ne pair of these protuberances is indicated as 42- and the other pair is indicated as 44. The arms of the clip are preferably shaped as at 46 to exhibit opposite arcuate edges or wedgelike surfaces.

To assemble the coil and bobbin assembly between the two arms of the stator as shown in the figures of the drawings, such bobbin and coil assembly is inserted from one side between the arms 12 and seated over the lug 18 of the bight portion of the stator. Such lug is receivable within the open end of the passageway through the bobbin or spool 22 as illustrated in FIG. 2. It will be noted that the projecting upper end portion of the lining 28 of the bobbin is received between the opposite ends of the overhanging arms 16. It will also be noted that there is a space between the upper end of the bobbin as shown in FIGS. 1 and 2 and the underside of the overhanging end portions 16 of the arms 12.

The U-shaped spring clip is next passed over the arms of the stator as shown particularly in FIG. 3. It is passed over one arm 12 until the bight portion 40 bears against such arm 12 and the diverging free end portions of the spring clip arms engage opposite sides of the other stator arm 12, all as shown in FIG. 3. When the clip is so engaged intermediate portions of its arms engage opposite sides of the projecting end 28 of the coil liner 26. When the clip is so engaged with the coil liner and the stator arms, it will be seen that the

opposed protuberances

42 and 44 of the resilient spring arms of the clip are wedged between the overhanging end portions 16 of stator arms 12 and the adjacent end of the coil and bobbin assembly.

Opposed inwardly projecting protuberances 42 are received between one overhanging arm 16 and the end of the bobbin and coil assembly being wedged therebetween.

3 Opposed inwardly projecting protuberances 44 of the spring clip arms are received underneath the overhanging end of the other stator arm and above the adjacent end portion of the bobbin and coil assembly and wedged therebetween.

T he resilient spring arms of the clip are tensioned toward each other so that the spring tension is such as to wedge the arcuate edges of the arms in place between the stator and the bobbin. As the spring arms of the clip are thus wedged in position the bobbin is held down against the bight of the stator and held in position by virtue of the interengagement of the lug 18 of the bight portion with the bobbin. The resilient tension of the spring clip does not act directly to hold the bobbin and coil assembly against the bight portion of the stator but it acts to urge the two arms of the spring clip toward each other and this wedges them between the overhanging ends of the stator arms and the adjacent end of the bobbin and thus holds the bobbin assembly toward the bight of the stator.

The solenoid may be provided with a base plate such as is indicated at 48, which may be secured to one side of a stator arm by welding or the like. This base plate may be provided with means whereby it may be attached to a support as desired.

Due to the simplicity of the assembly of parts, it is possible to assemble the component parts of this solenoid easily and rapidly. It is also possible to disassemble the structure rapidly and this assembly and disassembly may be carried out without the use of any special tools.

What 1 claim is:

1. In a solenoid, a generally C-shaped stator having opposed arms spaced apart providing a coil and bobbin assembly-receiving space therebetween, said arms connected at one end by the bight portion of the C-shaped stator and provided at the end opposite to said bight portion with inturned arm portions terminating spaced apart providing an armature-receiving opening therebetween, said bight portion of the stator provided with a lug spaced between the stator arms and projecting upwardly, a coil and bobbin assembly positioned between the stator arms seated upon the bight portion of the stator and spaced below the inturned ends of the stator arms with the passageway through the bobbin received at one end over said lug and at the opposite end aligned with the armaturereceiving opening between said inturned ends of the arms and with a portion of the bobbin extending beyond the coil and toward the space between the inturned ends of the stator arms, a T-shaped armature having its shank portion reciprocably extending through the armature-receiving opening between said inturned ends of the stator arms and into the bobbin passageway, and a generally U-shaped spring clip having its arms resiliently tensioned toward each other removably sprung transversely over one arm of the stator immediately underneath the inturned end of said arm with the two arms of the clip adjacent to its bight portion grippingly embracing therebetween said arm of the stator and grippingly embracing therebetween that portion of the bobbin assembly extending toward the space between the inturned ends of the stator arms, said two arms of the clip between the portion embracing said stator arm and the portion embracing said portion of the bobbin assembly tensioned toward each other and wedged within the space between the inturned end of the embraced stator arm and the adjacent end of the coil and bobbin assembly holding the coil and bobbin assembly toward the bight of the stator.

2. A solenoid as defined in claim 1 characterized in that portions of the two arms of the clip on opposite sides of that portion of the two arms which grippingly embraces that portion of the bobbin assembly that extends toward the space between the inturned ends of the stator arms and are wedged into the space between the two inturned ends of the stator arms and adjacent opposed end portions of the bobbin assembly holding the bobbin assembly yiel'dingly toward the bight of the stator.

3. A solenoid as defined in claim 1 characterized in that the two arms of the clip on opposite sides of that portion thereof which grippingly embraces that portion of the bobbin assembly that extends toward the space be tween the inturned ends of the stator arms are provided with indentations projecting toward each other and said indentations are tensioned toward each other and are wedged into the space between the two inturned ends of the stator arms and the adjacent opposite ends of the bobbin assembly holding the bobbin assembly yieldingly toward the bight of the stator.

4. A solenoid as defined in claim 3 characterized in that said indentations of the spring clip have their opposite edges tapered toward each other inwardly of the clip, and the free ends of the two arms of the clip grippingly engage an arm of the stator.

References Cited in the tile of this patent UNITED STATES PATENTS 2,616,452 Clay et al. Nov. 4, 1952 2,715,199 Bogue et al Aug. 9, 1955 2,812,479 Seitzman Nov. 5, 1957 2,904,729 Harwood Sept. 15, 1959