US1598884A - Resistance unit - Google Patents

Description

Sept. 7 ,1926. 1,598,884

L. B. SAUL-:R ET AL RESISTANCE UNIT Filed April 17 1924 Patented Sept. 7, 1926.

1,598,884 PATENT UFFICI-..

LOUIS B. BAUER, OF WESTERN STRINGS, `.AND `(zrEORIGE A. YA'NOCHOWSKI, 0F LA 'GRANGE IL'LINGIS, 'ASSIGNORS TO KELLOGG SWITCHBOARD AND SUPPLY COM- TAN'Y, 0F CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.

RESISTANCE VUNIT.

.Appution lined `Api-n 17, v1924. serial No. 707,045.

Our invention relates :to resistance units -and is krparticularly adapted to be employed yin .ignition systems wherein ythe main circuit is 'intermittently interrupted such as .are

now-employed in automobile ignition systems rand the like.

.A.n objectof our invention is the provision of n siniple,durable and cheaply constructed resistance .unit whose parts are simple in structure and very leasy to assemble into a 'single mountable unit.

Another' feature of our invention is the manner rand means employed for securing the diii'erent parts of .our resistance unit to- :gether against displacement and movement relative to each other` to form a single .mountable operating lunit.

A further .feature of our `invention is the simplified .manner in which we secure our vresistance unit yto ,the device with which our invention may be used. g f

'Still another feature :of Vour invention is the ovisionrof simplified Ymeans for conductive y connecting the resistance unit of our invention in circuit with the 4operating circuit-ot the device, with which our resistance unit is utilized, independently of the means which we employ for securing our resistance unit to said device and `which securing means also forms la featureof-our invention.

The above features, as well as others, will 'be more `specifically pointed out in the Aensuing specification and fora more complete and `clearer understanding of our invention 'reference may be had to the .accompanying drawings, in which `like reference characters in the several views denote like parts.

In the drawings:

Fig-.1 is a top plan view of the resistance unit fof our invention, showing the same secured lto ythe casing of `a distributing unit, `tlae top or covered.: said distributing unit being removed to expose certain operating parts of the distributing unit. This figure also shows the means We employ for conduc- `tively connecting our resistance unit incircuiri'. with the operatingr circuit of the distributing unit secured to the casi-ng yof said distributing unit;

Fig. 2 is a plan view in Ielevation of the resistance unit and circuit connecting means of our invention showing the same secured tu the casing of the distributing unit;

Fig. r3 is n right side view of Fig. Q;

Fig. 4 is a sectional view of the resistance unit of our invention along the line 4-4 of Fig. 2; and

Fig. 5 .is a sectional view of the resistance yunit and means for connecting the same in circuit with the circuit .control meansof 4the distributor unit of our invention along .the .line 5 5 of Fig. 2.

.Referringnow particularly to the distrib- .utingunit DU with which we Aillustrate and n describe our invention, we will first point out in general a few of the important parts or elements of said distributing unit.

EC is an venclosing casing afor enelosimg .and supporting various parts ofthe distributing unit DU, which Veasing is iprovided with a pair of yspring members or vlatches L for holding a suitable .top or cover on said casing and is also provided with an yintegrally formed member or bracket B .for adjustmounting fthe unit .DU in operative .position by any suitable means. A pair of interruptor contacts C are provided which are pivotally supported on a removable conducting plate P secured .in the -casing EC and are spring pressed finto` contactual engagement with a pair aoi stationary contacts C to close the ignition circuit, controlled by the distributing unit DU, throughsaid stationary contacts. `A cam member CM is provided which is secured rto .the rotatable shaft of the distributing unitandis 4adapted to yrotate -with the shaft Ato operate the .pair oi" interrupter contacts C to interrupt the contactual enfragement of said interrupter contaets C an a ,pair of stationary contacts 4C for .purposes well known to those skilled lin the art. A condenser D is also 'provided which is suitably secured .to a .Hat face portion `of 'the casing EC and .is adapted to be connected in the operating circuit for lthe well ,known purposes. For a clear understanding of our invention further description `ot .the distributing unit DIU is thought unnecessary and will., therefore, not be given.

Referring now in detail to the resistance unit RU of our invention, it comprises a re- `.sistance element carrying member 2, circular in shape and `for-med out of suitable insulaof a pre-determined resistance. The flat faces et' tie member' 2 have integrally toi-ined therewith rectangularly shaped extending lugs 7 and 8 tor purposes to be described presently. A disk member 9 ot suitable conducting material is provided and has a rectangular centrally located opening 10 of a size to permit said member 9 to lit snugly around the rectangular lug 'T ot the member 2 so that one tace ot' the disk member 9 engages the tlat circular face 5 ot the member 2, while the end ot the lug T tlush with the other tace ot the disk member 9. A protector 12 formed out ot suitable conducting material having an interrupted tlange 13 integrally 'formed therewith is provided. The protector 12 has a rectangularly shaped and centrally located opening 15 ot a size to permit said protector to lit snugly around the integrally formed lug 8 ot the insulation member 2 so that the face 16 of the protector 12 engages the circular face G ot the niember 2, the end ot' the lug 8 being flush with the other face 1T ot' the said protector 12. The flange 13 is cut away at certain places to avoid wrinkling of the said tlange when the same is formed on the protector 12 and to also permit passage of air currents, as do also the orifices 1S provided in the protector 12 as will be pointed out more in detail in the ensuing specitication. An ear 19 is integrally formed with the protector 12 and has an opening 2O provided in its :tree end through which a suitable screw 21 extends, said screw 21 extending through a U-shaped clamping member 22 and then has screwthreaded engagement with a suitable nut` 23. The clamping member 22 and free end of the ear 19 are adapted to receive and have clamped there between an external conductor by means of the screw 21 and nut 23.-

To secure the protector 12 and disk member 9 on the insulation member 2 against displacement a terrule 25 is provided which extends through suitable aligned openings in a metal washer 26, and an insulation washer 2T. then through a central opening in the insulation resistance element carrying member 2 and through a suitably aligned opening in an insulation washer 28, whereupon both protruding ends et the said terrule 25 are spun over by a spinning operation whereby the insulation washer 2T engages the outer tace of protector 12 and the end ot the lug and the insulation washer 28 engages the outer 'tace o'l" the member 9 and the end ot the lug` 'T of the insulation member 2. The protector 12 and the disk member 9 are now clamped and secured on the insulation meinber 2 against displacement by the washers 2G. 2T, 2S and the terrule 25, and against rotation on said member 2 by the engagement ot the rectangular lugs 7 and S whichextend snugliY through suitable rectangular openings in the protector 12 and member 9 as described above. The insulation washer 2T insulates the protector 12 trom the metal washer 26. while the said insulation washer 2T and the lug S insulate the said protector 12 'from the tei-rule 25, and the insulation washer 28 and 7 ot' the member 2 insulate the disk member 9 from the said lterrule then the parts oi the resistance unit llll are assembled as described above the helical resistance element 4 has its one end tied or soldered to an ear 8() integrally :termed with and at right angles to the member 9 and is then drawn taut around the insulation inember 2 in the groove or lhannel 23 ot said member 2 and has its other end tied or soldered to an xar 3l integrally liornied with the tlange 123 ot the protector 12. rl`hc helical resistance element il will remain in the channel 3 ot member 2 due to its spring ellect and the protector 12 and member 9 serve as terminals tor said resistance element il. The flange 13 ol' the protector 12 serves to protect the resistance element 4;, and the cut away portions o'l said flange 17;) and the orilices 1S permit air currents to pass therethrough to the resistance element l tor cooling purposes.

N ow in order to secure the resistance unit RU of our invention to the distributing unit DU as a single unit and in operative position relative thereto, we provide a suitable screw which extends through the central opening 3G in the terrule and then through a suitable opening 23T in the enclosing casing EC ot the distributing unit DU and has screw-threaded engagement with a suitably tapped nut 39, a suitable spring asher s0 being interposed between the nuty 39 and the inner tace ot the casingl E@ to prevent the nut 39 trom loosening and disengaging the screws b5 of own accord or by the vibration ot the distributing unit DU. The nut 39 drawn in on the screw 35 whereby the resistance unit llll is secured in position on the casing EC. It will be noted, however. that the protector and disk member 9 oi the resistance unit RU are not in any *ayconductivcly connected to the easing 'EC ot the distributing unit DU. consequently there will be no circuit closed through the protector 1.2, resistance clement fl and member 9 to the casing ,C when an external conductor is clamped between the U-shaped member 22 and ear 19 ot the protector 12 although the screw 9,9 has direct contactual engagement with the caring EC.

To connect the resistance unit itil' in cir cuit with the ignition circuit controlled by the interrupter contacts C and stationary.' contacts C. we provide au arm lll which is integrally formed with the disk member .i

and has its i'ree end biturcated. fr scr/er.' lf2 is provided which extends through a terminal member -il-IB. bilurcated end7 ot the arm 49., insulation bushing `l-l. nigh a coa IES) ducting member 45 Vintegrally formed with "the removable plate 46 ofthe distributing unit DU, said plate 46 ybeing connected in circuit With the contacts C and C. The terminal member 43 is rovided for receiving a conductor exten ing from the condenser D and is connected With vthe arm 40 through the metal washer 46 and screw 42. 'lhe `screw 42 has screw-threaded engagement with a suitably tapped nut 47 which is screwed down against the conducting member 45 to secure said screw 42 and parts engaging saidscrew in position. The screw 42 is insulated from Athe casing EC by the insulation bushing 44; the bushing 4 4 and insulation washer 5() insulating the arm 40 `from the casing EC and the insulation bushing 44 and #insulation Washer 5l insulating the conducting lmember 45 of the removable plate 46 from the said casing EC. Thus it will gbeapparent that the resistance unit RU -is in no Wayconductively connected I'to the `enclosing casing EC ot' the distributing unit DU.

The arm 40 of fthe member 9 need not be provided as anysuitable flexible conductor' may be employed and suitably connected to the screw 42 and soldered lto the said member 9 and it isto be understood that We do not Wish to be limited to the use of the rigid integrally ft'ornied arm 4() as shown and described.

To remove the resistance unit VRU from the distributing unit DU all xthat is necessary is to remove the screw 35 and "loosen the screw 42 which permits the removal of. the arm 40 from the screw 42 *through the bifurcated end of said arm 40 which engages said screw 42.

From vthe foregoing description it will be at once apparent that ourresistance unit RU is secured to the casing EC of the distributing unit DU independently of the movable and stationary contacts C and C and the other operating parts o'f the said distributing unit, and that the said resistance unit may be removed Without interfering with said contacts Aand said operating parts.

While We have illustrated and describeda preferred embodiment of ourfinvention We do not wish to be limited to the exact structure as shown and described as changes and modi tcations Awill readily suggest themselves without departing lfrom our invention and it is to be understood that we intend'to cover and claim all that which may come svithin the spirit and scope of the appended claims.

What we claim as new and desire to secure by United States Letters Patent, is:

1. A device of the class described including a non-conducting supporting member having a central opening, conducting members supported by'said supporting member, insulation Washers engaging said conduct.- ing members, a cylindrical member yof con- W. hers for engaging said lugs ducting material extending through said central opcinngand said Washers and having kits ends distorted to secure said conducting bers.

2. A device of the class described includ- :ing an insulation member having a pair of rectangularly shaped lugs integrally formed therewith, a pair of conducting members having rectangular openings for receiving said flugs and adapted to engage said insulation member, a pair of' insulation Washers for engaging said conducting members and the free ends of said lugs, a central opening in said insulation member, a cylindrical member for engaging said Washers and said opening in said insulation member and adapted to have its end spun over to prevent its removal andto clamp said conducting members between said insulation member and said insulation Washers to form a single ymountable unit, said lugs preventing rotary movement et said conducting members and also adapted to insulate said conducting members from said cylindrical member, and a resistance element supported on said insulation member having its ends secured to said conducting members.

3. A resistance unit comprising a pair of terminals, a supporting member of non-conducting material interposed between said terminals, insulation washers for engaging said terminals, a cylindrical n'ieinber for eX- tending through said Washers and said support-ing member and having its ends upset to secure said Washers and terminals on said supporting member, a resistance element supported on said supporting member and connected in circuit with said terminals, and protruding members integrally formed with said su pporting member for insulatingl said terminals from said cylindrical member and to prevent rotary movement ot said termiynais Lrelative to each other and to said supporting member.

4. A device of the class described including a pai-r ot' conducting members having llO rectangular centrally located openings, a re- 4 sistance element supporting member inter- ;posed between said conducting members and *having integrally 'formed thereivitl'i rectangulaily shaped lugs Yior engaging said openi s in said conducting nienib., as, insulation and said conducting members, an opening extending through said supporting member and said lugs, a cylindrical member tor engaging said opening and adapted to have its ends distortezl vvhereb)Y said conducting members are clamped on said lugs between said supporting member and said vv: shers to t'orm a singie operating unit. and a resistance element supported on said supporting member and having one et' its ends secured to one ot said conductingl members and its other end secured to the other ot said conducting members.

)L device oitl the class described including a nen-co iducting supporting member, a pair et' conducting members provided with centi-all)v loca openings, means including` a cylindrical memberI Y'i'or securing said conducting meml ers on said supporting memb r, members integrallyv Ytermed vvith said supporting member Yfor engaging the openings in rsaid conducting members to prevent rotation otl said conducting men'ibers relaive te each other and te said supporting naemler and also to insulate said conducting members 'from said clvlindri Aal member, and nce element supported on said supA poi in member and having its ends secured to said conducting members.

G. A device oit' the class described including a non-eoiulucting sui'iporting member, a conducting member having an integrally tormed tlange and a rectangular central opening', a rectangular member integrali)Y formed with said supporting member and adapted to engage said central opening in said conductingl member so that the tlange ot said conducting material extends over the periphery ot said supporting member, another conducting member having a rectanguiar central openino, another rectangular member integrall)r formed with said supporting member opposite to said tirstreetangular member 'for engaging the opening in said second conductingmember, means including a? cylindrical conducting member Ytor securing said conducting members on said supporting member against displacement, said rectangula members adapted to insulate said coi'iducting members from said t-,vlindrical conducting member, and a resistancey element supported on said supporting men'iber and having` its ends secured to said conducting` members, the flange of said tirf-t conducting men'iber adapted to protert said resistance elementI against injurj'.

T. fr device ot the class described including a tlat circular supporting member of non-conducting material and having intelgrallv Ytormezl therewith a rectangular member on cach side ot' said supporting member, a pair oi? conducting members each having a rectangular opening, one of said conducting members adapted to tit over one oit said rectangular members and engage one.

side ot the supporting member While the other ot said conflueting members lits over the other rectangular men'iber ot said supporting member, insulation Washers tor engaging said conducing members, and means including a conducting cylindri :al member tor clamping' said conducting inemliiers on said supporting member againsty displacement to form a single mountable unit, and a helica resistance element draivn taut around said supporting member and having one ot ends secured to one oit said coeiducti ig members and its other end secured to said other conducting meniber vi'herebliv a circuit is closed through said conducting members via said resistance element.

S. A device ot the class described including a non-condmting suljiporting member havinga circumferential groove 'termed therein, a pair et non-circular members integrally Ytermed .vith said supporting menr ber, saitV supporting central opening extending through said ien-circular members, a pair et conducting members tor litting over said nen-circular members and adapt-ed to engage said supporting member, insulation Washers Afor enk ging said conducting members, a cvliir drcal'member tor extending through said central opening and said v'ashers and having its tree ends distorted vvhcreb)v said conducting members are clamped on said supporting member between said distorted ends to prevent their displacement, said non-circular members adapted to prevent rotar)Y movement et said conducting members relative to each ther and to said supporting member, and a resistance element resting in said circumferential `groove and having its ends connected to said conductingl members to connect said conducting members in circuit.

9. 'X device ot' the class described ineluding an insulation member, a pair ot rec1 tangular lugs formed integrali)r with said member, a pair ot conductingl members provided vvith rectangular openings adapted to receive said pair ot lugs, insulation `Vasi ers ifor engaging said pair o1 conducting ineinbers and said pair oll lugs, a iterrule `tor engaging said insulation membel and insulation washers having its ends spun over to secure said pair ot conducting members and Vashers on said insulation member to itorm a single i'nountablc unit, and a metal washer interposed betiveen one Ot said washers and one ot the spun over ends ol said it'errule.

lO. A device oi the class described including an insulation menilier having a central opening and a circumiterential groove. z pair of rectangular lugs itormed integrallyY with said member and through which said opening extends, a pair ot' tern'iinals having rectangular openings and adapted to tit over said lugs and engage said msulation memmember provided with ber, a cylindrical member extending through said central opening and having its ends turned over to prevent its removal, insulan tion washers interposed between said turned over ends and the ends of said pair of lugs, said cylindrical member' adapted to clamp said washers and terminals on said insulation member against displacement andsaid lugs adapted to preventrotary movement of said terminals, and to also separate said cylindrical member from said lugs, a resistance element secured to said terminals and adapted to engage said circumferential groove, and a flange integrally formed with one of said terminals for protecting said resistance element against injury, said one terminal having openings for permitting air currents to pass therethrough to said resistance element.

1l. A device of the class described including a pair of terminals having rectangular openings, an insulation member having rectangular lugs integrally formed therewith interposed between said pair of terminals,

said lugs adapted to extend through the openings in said terminals, an opening for said insulation member extending through said pair of lugs, a ferrule engaging said opening for clamping said terminals on said insulation member against displacement, insulation washers and a metal washer for engaging said fel-rule, said ferrule having its ends spun over to clamp said terminals between said insulation member and said washers to form a single mountable unit, said lugs engaging said rectangular openings to prevent rotary movement of said pair of terminals on said insulation member, and a resistance element supported on said insulation member and having its ends secured to said pair oit terminals whereby said terminals are included in circuit with each other via said resistance element.

Signed by us at Chicago, in the county of Cook and State of Illinois, this th day of April, 1924.

LOUIS B. SAUER. GEORGE A. YANOCHOVSKI.

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