US1710999A - Object-inclosing casing - Google Patents

Description

April 3o, 1929.

W. SCHMID OBJECT INCLOSING GASING Filed April 5. 1926 :711/14 1111 'Il c.: r,

Patented Apr. 30, 1929.

WILLIAM SCHMII), OF COLDWATER, MICHIGAN, ASSIGNOR T CASKEYJDUPBE 'Mur UFACTURING COMPANY, OF COIDWATER, MICHIGAN, .A CORPQRTION OFOHIO.

OBJ ECTJN CLOSING CASING.

Application led April 5,

My invention relates to objects inclosing n casings having closures and resides in the Lil) provision ot improved intere-ngaging torniations upon the body of such a casing and the closure therefor whereby the closure may be surrounded by the casing body.

In accordance with my invention, the cle sure is provided with tongues projecting trom the edge thereof into recesses formed in the casing body and the casing body, in turn, is formed with tongues that project into recesses formed in the closure. Each tongue upon the closure also constitutes a Wall of one of the recesses, the tongues and recesses upon the closure being distributed in couples around the closure. The tongues and recesses upon the body of the casing similarly inter-related. The interengaging "formations upon the casing bodyY and casing closure are thus provided in compact arrangement without weakening the structure.

The casing ot my invention is ot' j )articular ser 7ice in the construction oit switches having movable switching pai-ts Within the casing and terminal contacts passing through the casing closure whe-re they are connected with the circuit Wires. The recesses in the casing closure receive the tongues upon the casing body at a depth which Will Widely space tongues upon the casing body trom the circuit ivires upon the outer tace of the closure whereby the casing body, which is customarilv nietldlic7 `is removed trom the short circuiting relation with the terminal contacts upon the casing closure.

"lfhe accompanying drawing illustrates the pretcrrcnl embodiment ot the invention as employed. with a switch structure. Fig. 1 being a rear vieuv ot a switch having a easine: ot rnv invention; Fig. 2 a sectional plan view online QW@ oit Fig. 1 Fig. 3 is a plan fieiv ot part ot the casing; and Fig. l illustrates a portion ot the casing body and cas ing closure in perspective and in separated relation.

rllhe structure illustrated includes a metallic cylindrical casing body 1 having a Wall 2 at one end thereof. rIbis casing body is suitably assembled at its said end Wall With a mounting plate 3. The said end Wall is nvv'ardly dished to provide.` with the mount-- ing plate, an annularl recess il. The hub por tion 5 ot a switch handle 6 is Jformed With flanges 7 that are received in the recess el, the inner end of the hub projecting through 192e. j serial Nofsasaa.

a circular holeS in the mounting plate, this hole being coaxial with `the ycasing body. This construction and arrangement of the handle permits iteto be turned'upon;` the axis of the casing body.l A ring9 of insulation is also coaxial with the casing body, the handle being placed in turning engagement with thisring by'means of `the tonguesy 10 that are received Within grooves 11 formed upon the inner side of the ring. This ring is formed with cylindrical recesses 12 in` which the cylindrical spring barrels 13 are slidably received. These spring barrels house coiled springs 14 and inclose the headed ends ot the plungers 15 that project through the spring barrels into engagement with the end Walls of the recesses 12.v The springs 14 press upon the plunger-s andjiilso upon the spring barrels and therefore tend to press these parts in opposite diretions. The spring barrels are mounted upon a .float-y ing contact carrier 1G, here shown as a metallic ring. The ends of the spring barrels opposite the ends through which the pluug# ers project constitute contacts which are engageable with the contacts 17 which are in the nat-ure of flanges at the inner ends of metallic bushings 18. These metallic bushings are also provded with flanges 19 at their rear ends. The metallic contact bushings 18 are carried by and passed through a closure in the form of a circular plate 2O formed ot' inj sulating material. The bushings are threaded to receive binding screws 21. that cl amp the circuit Wires Q2 into firm mechanical and electrical engagement with the bushings.

The closure 20 is surrounded by the casbody and has tongues in the plane thereof that project beyond the closure 20- into recesses 2l formed in the casing body. The casing body is formed With tongues Q5 that are inwardly bent at angles to the cylindrical wall ot' the casing body to be received Within recesses 26 formed in the closure. The tongues 23 areot' the full thickness ot the ciri cular closure 20, While the recesses 26 are of a depth less than the thickness ot the closure to atl'ord slots for the angular tongues 25. The angular tongues 25 upon the casing body rmly hold the closure tongues 23 in the bottoms ot the recesses 24 whereby the contacts 17 are held in a fixed plane to enable the con tacts upon the carrier 16 to be properly brought into and out of engagement therewith. The recesses 26 in the closure define positions for the inturned tongues 25 which will Widely separate these tongues from the bushing flanges 19 and the wires clamped against these flanges by the screws 2l Whereby the tongues 25 are )revented from liuving short circuiting relation with the contacts upon the closure. The tongues 23 constitute Walls of the recesses 26, each tongue 23 thus having a recess 26 immediately contiguous thereto, the recesses 24 and tongues 25 in the casing body being similarly related.

Having thus described my invention, I claim:

A easing struct-ure `coniprising n cylindrical casing body and a closure in the forni of u circular plate surrounded by the easing body, said casing body and closure being euch formed with immediately contiguous tongues und recesses, the tongues upon the closure being in the plane of the closure end substantially of the thickness of the closure, the recesses in the closure being less in depth than the thickness of the closure to afford seats for the tongues upon the casing body, these tongues being inwardly bent into the recesses in the closure and engaging the aforesaid slots to hold the closure against outward move nient with respect to the easing the tongues upon the closure projecting into the recesses in the casing body and acting iinlependontly of the tongues on said easing to hold the closure against turning movement within the easing.

In witness whereof, I hereunto subscribe my name.

IVILLIAM SCHMII).

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