US1687040A - Best available cop - Google Patents

Description

Oct. 9, 1928. 1,687,040 w. D. scHRoPE IGNITION DEVICE Filed Aug. 2, 1526 Patented Oct. 9, 1928.

UNITED STATES PATENT OFFICE.

WIILIAM n'. sc'iIRorE, or ANDERSON, INDIANA, AssIGNoR, Er MEsNE ASSIGNMENTS, To DELco-REMY coEPonATIoN, E DAYTON, oHIo, A conroEATIoN or DELAWARE.

This invention relates-to ignition timers for internal-combustion engines.'

It is among the objects of thepresvent invention to simplify-the construction of 1g,

5 nition timing devices for engines so that the various adjustments' necessaryin-adevice may be made precisely an'd -Wit-hfsimple tools and minimum laborlj Y Further objects 'andl advantages of the present invention will be apparent -rom' the following description,- reference being'had to the accompanyingV drawings, wherem a preferred fc'i'rxri of exiibddinent of l 'the present Y intenti@'isciearlyfshwa if. 'ntheidiawingsf la i* 'v 5f'- "Fig". lis Ea 'fplan viervvfof' 'the ignition timer having lthe' 'distributor -head "removed therefrom., "'lf'if': 'H'kuu l Y. -'Fig' 21 'is a` fragmentary setionalview takenaln'g'the'lin2il2ofEige'1.` :Fi '3"isffa': d :tail `laiiE -vfiiw"foi`4 he' aperture"V mounting -p'latefwith the bridging con# ductormouilted ,thrm -Qther' parts' carsoi Figi'fis'a.detailedfsectintaken'falong the lines Hbf-:Fig3 -7`.:' 55;..:..; amar.:- 'adiag'ainnatic viewishowing the electical"conxiections of the fi'gitionf timer when included in an icgnitipn system. f

3'5 :f'IReferrin'gf cette? rawingf the ignition device is 'as" 'coinpris'iig" a 'housing 2Q whichis adapted to besecuredt to 'thei engine in' an? suitable'l manner. V'In "this housing there' provided fa hollow 'sleeve 21 having a- '4'0" shaft 22Ae'irtendingjthere'into fwhichsliaft is included in' the7 driving ''nnetions'between 'tli engine'iand the" hollow "'sle've21. The method lof "journaling :the sleeve 21 in' the distributor andthev method of 'Connecting 45'- af'fshajfr 22'v with fai-@engine --bein'g well lownimthe" artl-noillustration of these structure's'has"beenincluded in thc'drawings. The fend oitlie sleeve-21 isl tapered as at 23 and hasa V :arri2l1ffitting aboutit. f This cam 50 is held inipo'sition on the sleeve 21l by a nut 25'whi'c`h engagesthe'upper threaded end of the sleeve, '.Thecam 24 has a cylindrical extension 26 having a flat surface'27 which is received by asimilarly shaped recess in a IGNITION DEVICE."

Application fliedl August 2, 192e -seriai No. 126,413.

rotor block 28. The rotor block 28 carries a conducting strip 29 which is adapted to rotate in close proximity to the plurality of terminals 30 carried b v the distributor head 31 for the purpose of distributing spark impulses to the engine. The distributor head 31 fits on the peripheral edge ot' housing 2O and is held on said housing by clips 32 which are hingedly secured to the outer Wall of the housing. v

lWithin the housing there is provided a mounting p late 35,41 detailed plan of which is shownin fFig. -This'- mounting 'plate` has downwardly turned ears 36`formed'in' spaced relation" on :its periphery, -said ears having screw-threaded apertures for receivi' ing screws-37 lwhich secure the mounting plate in the housing. 1 These screws also se-4 cure hinge brackets 33 to the housing- 20 which brackets'- hingedly support theclips 32. The mounting plate 35 -is provided with elonfrated apertures 38 and 39 oppositely dispose from the central opening 401 in said plate: A pivot postj41jis carried' on the plate 35 adjacent the aperture 38. Plate 35 supports two members havingl screW driver# slotted heads ft2A andf43 and eccentric stems 42a and 43a'respect'i'velyiby which .these members are-pivotallyconnected with Athe plate; A 'plurality-ofv screw threadedfholes' 44,45, 46' and 67 andrplaim ho'les 47'and'48 areprovided in this plate. *E ''.f' f

A"bridgii1g'conductorf 50is secured to the undersidefof plate 35-by'1rivets 51. 'A'strip of- =insulation= 521is' interposed' lbetween said bridging conductor and the plate35 so that these two elements are not in electrical connection. 2 The bridging-conductor has angu-l lar portionsl53 and 5ft so'constructed and-ar# ranged'tliat 'thei portion V53 will' extend' up throughrthev aperture 39? of plate v35- without-engaging saidv plate While theangular portion 54 extends up through the Saperture 38 without engaging. anyl portion of plate 35. The angular portions'53 and 54 have elongated apertures -53a and` 54a re spectively for receiving screws 55 and' 56 respectively which cooperate WithnutsV 55a' and 56a respectively tosecure leaf spring conductors'57 and 58 to the angular portions 53 and 54, respectively.` An arm 59 of the bridging conductor extends through an aperture 60 formed' in the timer housing. The arm is insulated from the housing' by two plates 61 and 62 secured on opposite sides of the arm 59 adjacent the opening 60 in the housing.

An adjustable plate 65 is .pivotally secured to the mounting plate by means of a screw 66 which passes through an aperture of plate 65 and screws into the screw-threaded opening 67 of plate 35. Thus the plate 65 is in electrical connection with the mounting plate 35. Plate 65 has arcuate slots 68 and 69 for receiving screws 70 and 71 respectively screw-threaded into the tapped holes and 46 respectively in the plate 35. These screws 70 and 71 when tightened hold the plate 65 in any desired position on platey 35. Intermediate the screws 70 and 66 the plate 65 is provided with 'an elongated slot 72 into which extends the screw-driverslot ted head 42 carried? by plate 35. Loosening of screws 66, 70 and 71 will permit adjustment-of plate 65 by rotation of the head 42 which, as has been 'mentioned before, is rot-atably connectedwith the plate'35 by means of a stem. eccentric to said screwheadf. l

A plurality oi'circuit interrupters are providedinthe housing 20,.oneof.said circuit interrupters beingcarried by 'the mounting plate-35 while the othercircuit interrupter is carriedby theiadjusim'ble` late 65.- The circuit interruptermoun on; plate 35 'i'n. cludesz-a'n adjustableb'racket 80- pivo'ted to the post 41.and in electrical connection therewith. 'lhis :bracket has an. angular portion 81 upon .which iscarrieda contact member 82termcd thefstationary-con'tactl- Adjacent-.thisendpf--thefbracket there '-is..pro-

vided an rareuateslot-athrough iwhi'ch' ex- 65.- -A contact bracket 91 is pivoted upon this pin 90 and in electrical connection therewithjand, like the other interrupter bracket 80, is provided with an angular portion-93 carrying a stationary contact 94. Adjacent this. contact 94:y the bracket 9.1 is provided with an arcuate --slot 95 through which extends the-stem of screw 96. which is screw-threaded into the plate 65. The plate carries an eccentrically mounted screwdriver-slotted head 97 which extends into an elongated slot 98 provided in bracket 91. iVhen the screw is loosened and the head 97 is turned the bracket 91 is rotated relative to its pivot pin 90 carried on the plate 65.

Contact 94 is adapted to be engaged by a contact 99 which is carried at the free end of a contact arm 100, supportingr a cam follower 105. Like in the other interrupter, contact bracket and contact aim are mounted coaxially, the arm of the former interrupter being in electrical connection with the pivot pin and the arm of the latter insulated therefrom. In Fig. 4 the Contact arm 100 is shown mounted on the insulating sleeve 101 which in turn fits over the pivot pin 90 carried by the adjustable plate 65. The sleeve 101 is held on the pin 90 by a lock spring washer 102.

As shown in Fig. 1, the movable contact arm 86 of the interrupter carried. onV the mounting plate 35 is electrically connected with the angular portion 54 of the bridging member 50 by a flat spring conductorz-58 while the movable contact arm is electrically connected with the other angular portion 53 of the bridging member 50 by the flat spring conductor 57. This spring conductor 57 is' so constructed and arranged as to permit adiustment of. the plate 65 without interference by thesprin'g. The spring ressure between contacts 99 and. 94 can e adjusted by loosening the nut 55a which holds screw 55 and moving. the screw V55 sidewisein the slot 53a in the angularportion 53 in order to move the stationary 4end of spring 57 relative to thecontact arm 100. The screw 55 and said end of 4spring. 57 .are clamped-in adjusted position by the -nut:-55. In a similar manner, the fixed end -of .the spring 5 8 can be vadjust ed,-the .screw-56 passing through a slot 54a in. thel angular. portion54. Referring toFig.. 7 it maybeseen that the contacts of the two interrupters operate inaapredetermined sequence; First the' contacts 82 and 87 will beseparate'd'to provide a sparking impulse then the contacts 94 and 99 will be separated tof provide anotherjimF pulse5 these operations' being recurrent. in proper sequence. If oneA of thev cam followers should wear more than the other, or if one lobe of thecam wear away faster than another, causing the intervals between sparking impulss to vary, or if for any other reason the timing of the sparking impulses be effected, the plate 65 may be loosened and adjusted relative to the plate 35 thereby shifting the positions of the cam followers relative to the cam and thus vary ing the angular relation between the two cam followers of the two circuit interrupters relative to the cam for purposes 0f again establishingr proper sequential sparking imzit) pulses. If 'on the other hand the co-operating contacts of either interrupter'do not separate suiliciently to properly break the circuit, that is, if the movable contact is not moved a'sufiicient distance from its cooperating stationarycontact by the operation of the cam, the properstationary contact bracket can be adjusted by'means of its eccentric adjusting screw thereby to adjust the 'gap' between the said cooperating contacts.` To make such an adjustment, for instance, between contacts-94-'and 99, the operator first unscrews the screw 96 t0 release the contact bracket 91 from the plate 65,V then the screW-driver-slotted head 97 is rotated to move the contact bracket 91 about its pivoted pin 90 toward the cam 24. The cam is then rotated so that the cam follower 105 of the contact Carrying arm 100 rides upon one of the cam lobes. Following this, a shim of proper thickness is placed between the contacts 94 and 99 and then the screwdriver-slotted head 97 is rotated to move the contact carrying bracket 91 so that the shim may easily be withdrawn from between the contacts. After this screw 96 is again tightened to clamp the contact carrying bracket 91 upon the plate 65. The interrupter including bracket 8O and arm 86 may be adjusted in a similar manner. From Athis it will be noted that all of these adjustments may be made with a. single screw driver. No special tools are necessary and neither need be held in adjusted position While it is being secured in the adjusted position. Thus the present device provides an ignition timer of simplev structure and design which may be easily adjusted.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. An iginition device comprising in combination, a housing; a cam in the housing; pivot pins in said housing; an adjustable, stationary contact bracket pivoted on each of said pivotpins and in electrical connection therewith; and a cam operated, contact carrying arm pivoted on each of said pivot pins so that the contact of each arm is adapted to engage the contact of its respective stationary contact bracket.

2. An ignition device comprising in combination, a housing; a cam in said housing; a pivot pin in the housing; a contact carrying bracket pivoted to said pin and in electrical connection therewith; a. cam operated contact carrying arm also pivoted on said pin, but insulated from the bracket and pin; a flat spring conductor anchored to said arm, and adapted to hold the contact of the arm in engagement with the contact of the bracket; and means for moving the bracket on the pivot pin to adjust said bracket relative to the contact arm.

3. An ignition device comprising in combination a housing; a cam in said housing; an apertured mounting plate secured in the housing; a conducting bridging member insulatingly secured to the one side of the said mounting plate, said member having angular portions extending through the apertures in said plate; circuit interrupters in said housing on the side of the mounting plate opposite the bridging member, said interrupters each including a stationary contact bracket anda movable arm carrying a contact adapted to engage with the contact of the stationary bracket; and a leaf spring conductor interposed between each contact arm and an angular portion of the bridging member extending through thev mounting plate, and being in eieetrical connection with both.

4. An ignition device comprising in combination, a housing; a cam in said housing; an apertured mounting plate secured in said housing; a plurality of circuit interrupters in said housing, on one side of the mounting plate; a conducting bridging member insulatingly secured to the other side of the mounting plate, the said member having angular portions extending through the apertures of the mounting plate; a terminal arm extending from the bridging member through the housing but insulated therefrom; and leaf spring conductors interposed between the interrupters and the several angular portions of the said member.

5. An ignition device comprising in combination, a housing; a cam in said housing; a mounting plate secured in the housing; an adjustable plate pivotally carried by mounting plate and in electrical connection therewith; circuit interrupters supported on each of said plates, said interrupters each including an adjustable bracket carrying a contact and a co-operating contact carrying arm coaxially pivoted on the respective plates; and conducting means normally holding the movable contact on the arm in engagement wit-h the contact on the bracket.

6. An ignition device comprising in combinat-ion, a housing; a cam in said housing; a mounting plate secured in the housing; a pivot pin on said plate; an adjustable plate pivotally carried by the mounting plate and in electrical connection therewith, said adjustable plate also having a pivot pin; circuit interrupters in said housing, one of which is carried by the mounting plate, the other by the adjustable plate each interrupter including a contact carrying adjustable bracket pivoted on and elect-ricallj. connected with the pivot pin of its respective plate, and also including a cam controlled, contact carrying arm also pivoted on but insulated from the pivot pin of its respective contact bracket; and spring conductors connected to each contact carrying arm and adapted normally to hold the Contact of the arm in engagement with the respective bracket Contact and to conduct electric current to each of said arms.

7 An ignition device comprising in cornbination, a housing; a cam in said housing; an apertured mounting plate secured in the housing; a pivot pin on' said plate; an adjustable plate pivotally carried by the mounting plate and in electrical connection therewith, said adjustable plate also having a pivot pin; circuit interrupters in said housing, one of which is carried by the mount-ingplate, the other by the adjustable plate, each interrupter including a contact carrying adjustable bracket pivoted on and electrically connected with the pivot pin of its respective plate, and also including a cam controlled, contact carrying arm also pivoted on but insulated from the pivot piu of its respective Contact bracket; a bridging, conducting member insulatingly secured to the side of the mounting plate opposite the adjustable plate, said member including angular portions extending through the apertures in the mounting plate; and spring conductors interposed between said angular portions and the several cam controlled contact arms.

In testimony whereof I hereto affix my signature.

WM. D. scHRoPE.

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