US1343472A - Vania - Google Patents

Description

j wurw A. PAPINI.

COMPBESSIBLE RHEOSTAT.

APPLICATION mw MAA. 23. 1920.

1,343,472. A Patented June 15, 1920.

11.., i h u ATTORNEYS. i'

UNITED STATES PATENT OFFICE.

ANTONIO PAPINI, OF PHILADELPHIA, PENNSYLVANIA. ASSIGNOR T0 A. MECKY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYL- VARIA.

COMPRESSIBLE BHEOSTAT.

Specification of Letters Patent.

Patented J une 15, 1920.

Application led March 23, 1920. Serial No. 368,020.

To all whom t may concern.-

Be it known that I, ANTONIO Parmi, a subject of the King of Italy, and having resided in the United States one year lastl ast, and having declared my intention ot becoming a citizen thereof, residinfr 1n the city and county of Philadelphia, tate of Pennsylvania, have invented a new and useful Compressible Rheostat, of which the tollowing is a specification.

My invention consists of a novel construe` tion of a double cell rheostat which is de signed to step down the current of the house lighting circuit to the proper point so that said current can be used in connection with bells, audible signals and the like, my novel device being provided with novel adjustable devices, so that it may be adjusted to take care of one bell or a plurality of bells.

My novel rheostat is designed to be fastened or supported upon a Wall, board or other support, and its general principles of operation embodies the compression of conducting and non-conducting substances commingled together, as mica and graphite or graphite and asbestos or the like, said substances being comminuted or commingled in suitable proportions and the compression taking place in a plurality ot' separate cylinders contained within a porcelain body, said cylinders containing pistons which are operable or adjustable in unison.

It further consists of a novel construction of a rheostat, comprising a cover or body of porcelain or the like within which cylinders are formed, said cylinders containing porcelain or other pistons, which have a connecting plate common thereto, said late having a threaded stem passing tierethrough and being held in proper position by a suitable tenslon device.

It further consists of a novel construction of a bottom closure and its adjuncts for the bottom of the transformer wherein the bottom of the porcelain body is rovided with means for insulating and retaining said closure in proper position with respect to said bottom.

It further consists of a novel construction of a bottom closure having integral eyes, struck up therefrom and rods or pins passing throu h said eyes and having their ends cated in t e walls of the rheostat bod It further consists of other nove features of construction all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same will be found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities oi which my invention consists can be variously arrangedand organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a 1vertical sectional view of a rheostat embodying my invention, the section being taken on line 1 1 of Fig. 2. F ig. 2 represents a section on line 2--2 of ig. 3 represents a top plan view of F i 1.

ig. 4 represents in detached position a perspective view of a connectin plate employed, the same being shown 1n detached position from its coacting pistons.

Fig. 5 represents a perspective view of the bottom plate or closure in detached position.

Similar numerals of reference indicate corresponding parts in the igures.

1 designates my novel construction of a rheostat, all the internal mechanism thereof being contained Within a cover or body of porcelain or the like 2, which is composed of the top 3 and depending Walls 4, the bottom of sa id body being initially left open while from about the center of said top depends the preferably integral wall or portion 5, having the bore or passage 6 therethrou h, in which is seated the screw 7, whose hea 8 is contained in the countersunk portion 9. lVithin the cover 2 are formed two cylinder hores or piston chambers 10 closed at their top and open at their bottom and as the construction of cach and their adjuncts is substantially the same, a description of one will sufiice for both. At the upper extremity of each piston chamber, cell or bore 10, I locate the contact plate 11, against which contacts -the resistance material 12 which latter is contained between said plate 11 and the piston contact plate 13 which is carried by the porcelain piston 14. The piston contact late 13 has an asbestos washer 15 interposed betweeiLit and the piston 14, and said plate, washer and pstoii are held in assembled position by the screw 16. 17 designates an insulatingwasher, and the parts 13, 14, 15 and 17 are held in position by the nut 18, said screw and nut also serving as a binding post for the lead wire 19 shown in ["ig. 2, but omittedfrcm Fig, 1, for the salie of clearness of illustration.

20 designates a compressing plate com posed of the straight members 21, having thel holes-.- 22` tliei'elilirougli,I througlv which the screws 16 pass, andiinthe-intermediate bowed or depressed-'portion23' having the hola-24 therethrough which may be tapped or: threaded, through which passes the -lower threadedi-portion ofi 1the-central screwr` 7, it being'ap arentthwt the coiled spring 25, seen inf i i 1 andinterposed betweenthe top=oftlie epressed portion 23 andthe bottomfof` the -walll 5,- will exert the proper -tenA sion 'upon 'said plate20 atl all! timesand 'that asthe screw 7 isrvrotated the 4position oil the pistons 14andvthe extent of` compression lon the-materiali 12, maybe readilyvanied, as desired: i

The compressing-plate 20 isproperlyl insulatedfrem the binding-posts-l'by the washers 17.

26'and'27 designate conductors, whose terminals as 28 and 29 are connected electrically to thefcontactplates 11, the manner of such connection being apparent from-the rigltofFig; -andtlie upper-left) hand-portion oEi'g: 2; theloop 29 beingsoldered-to the-plate 11. Atfthelwer-rghtmf Fi'g 2 is shown thepreferredfcenneetionof the terminel ofthe wirellto-its-bndin -post- 16, tlle terminal lportion -30 being so deredto the4 washerl.' The open bottom\-of-the cover or bedy=2 has the shoulder'32against whiehis-secumd the paperor otheninsulating-materialf 325; which` isheld' in place by the bottom closure 33f off metulor similar rruiteirial;l said Iclosure hav-ingthe Vpunched or-slieared loops struck up thererom-form ing'tl'le-eyes whichlmay be four in num bei',v .as willlbe understood from- Fig. 5 through lwhich pass'v the -pins 35' whose outer ends' areseated n=holes 36=in the walls'2.`

Aswillz be understood' from Fig: 2, tue pins-35ai'esliorter than the outer dimensions of tliecase orl body 2 and the outer portionsfolsad' holes 36V are filled with cem0n`37 Tlie foregoing construction forms a neat andfe'ieient-clsuie for` the bottom of the rheoslsat' body, since it eleotively seals and clses 'the saine, as isevident.

THe-slotted lugs 38 form aeonvenent meansforsecuring the rheostat inthe de' si'iiedlposi-tion, and? the-recesses 39- whose location -n the bnseof the rheostab will-be undezsboodfom--Fge 1 and-2am for *ventilation purposes.

llt will he seen from the foregoing that by adjusting the screw 7, the compression of the material 12 can be varied according to requirements, through the medium of the plate 20 and the pistons 14 and-their adfuiicts, anydcsrcd adjustment of'said screw icing) readill made by the insertion of a suite le imp ement throu h the countersunk hole 9 in the top of the cevicc'it vbeingfapparent that theresistance of the material 12 will be varied, according to its compression cil'cctcd by the adj ustmentiof the pistons. 14.

The double cell constizuetionseen inA Eig. 1 and the-provisionpfthe adjustingfdev-ice above referredto, enablein novel rheostat to bei readily,r adjusted to different voltages to take care of one belloin audible .signaler a plurality thereof- It will now be. apparent thatI have de vised. a novel and uscfuhcoiisstructiou of, a rheostat which embodies the features of advantage enumerated as desirable inthe stato.- mentiof the invention and the above descrip tionand while I have, in. the present. instance, showii aiiddescribed a preferredenibodimentthereof which= will be. found in practice togiife satisfactor Y and. reliable |1'csults, it is tobe understoodithat;theame is susceptible off modification in vuriousparticulainv withouv departing from thespirit or; scope o thednventionzor. saorificinggany of its advantages.

Havingthus described my. invention, -what l claim as. newv and clesiue-ltoswureby. Letters Patentuis:

1. In a double-cell rheestat, aiponoelain body, havingga pluralityY ofi piston chambers therein, .a contact platefonthe .top of. each ofi said-y piston chambers,- .a contact plate` for each 011 saidv pistonsand .insulatedl therefrom, compreible resistance.- material between: said p1ates,a icoinpressing plate .coniinon to said pistons, airadjusting screwintermediate ofsaid cylindere,. and.in.engag ment: with said plallmandA av springintlmdiate of' said Vplatofandftheportioln oisaid body'in1 which said screwis Allnlilntedu 2. Inardoublc cell: rheostat,..aurcelain bod having a. closed top, depen ingside wal s andian-openbase,` istonichambersin saidbody, pistons in-` sai ;chambers,-.an.ad justing screw mountedrin saidbody.; intermediate of'said pstons,a comprein plate commomtmsaid piston and,.in.threa ed engagement4 with-said. screw, andmeans .interposedbetween. said compressi-n plnteand the portion oi the :bodytnnwhi said. screw is mounteale fon resiliently: supporting said pistons and compressing plate.

3; Irl-.a double cell, rheestah, ai orcelain bodvhaving a; closed top,.depen in L side walls-and an'open base, (piston chambers in said body',- pistons in sa-i chambers, an..a(1- justing screw4 mounted in.said;body; ntermediate-of said pistons.and a compressing plate common to said piston and in threaded engagement with said screw, in combination with a tension device for said plate.

4. In a double cell rheostat, a porcelain body having a closed top, depending side Walls and an open base, piston chambers in said body, pistons in said chambers, an adjusting screw mounted in said body intermediate of said pistons, and a compressing plate common to said piston and in threaded engagement With said screw, in combination With a closure for said open base, eyes on the inner surface of said closure, insulating material above said closure, and pins passing through said eyes and seated in holes in said Walls.

5. In a double cell rheostat, a porcelain body having a closed top, depending side Walls and an open base, piston chambers in said body, pistons in said chambers, an adjusting screw mounted in said body intermediate of said pistons, a compressing plate common to said piston and in threaded engagement with said screw, in combination with a tension device, pressin outwardly on said plate, a closure for sai open base, eyes on the inner surface of said closure, insulating material above said closure, pins passing through said eyes and seated in holes in said Walls and a cement filling for the outer ends of said holes.

6. In a double cell rheostat, a body, a plurality of cells therein, compressible resistance material therein, means for varyin the compression on said resistance materia a closure for the bottom of said body comprising a plate having eyes on its inner surface, insulating material on said plate, pins passing through said eyes and having their ends seated in holes in said body and closing means for said holes.

7. In a double cell rheostat, a plurality of cells, compressiblc resistance material therein, contact plates above and below said resistance material, a threaded screw intermediate of said cells, a compressin plate actuated by said screw, and resilient y supported connections from said plate for varying1 the compression of said resistance materia 8. In a double cell rheostat, a bod a cell therein containing resistance materia ,means for compressing the latter, and a closure for the bottom of said body, comprising a plate having eyes therein, pins passing throu h said eyes and having their ends seated 1n holes in said body and a cement filling for the outer ends of said holes.

ANTONIO PAPINI.

Witnesses:

J oHN A. WIEDERSIIEIM, N. BUSSINGER.

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