US1624113A - Ignition apparatus - Google Patents

Description

1,624,113,v Aprll 12, 1927. H. E' NORVEL 4 IGNITION APPARATUS Filed Nov. 20. 1923 iso Patented yApr. VV12, 1927.

Ulll'l'liil) STATES l A Y 11,624,113 PATENT VOFFICE'. f

HARRY E. NOBVIEL, OF ANDERSON, INDIANA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO DELCO-REHY CORPORATION, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

IGNITION APPARATUS.

Application led November 20, 1923. Serial No. 675,928.

This invention relates to ignition apparatus for internal-combustion engines, and has. among its objects to simplify the construction of an ignition timerand'dstributor unit in order that the cost of manufacture may be reduced. I

Further objects 'and advantages of the present invention will be apparent from the following description, reference being had m to the accompanying drawings, wherein a preferred'embodiment of one form of the present invention is clearly shown.

In the drawings: Fig. l is a longitudinal sectional view of 1A a timer distributor unit constructed vin accordance with the present invention.

Fig. 2 is a plan View with the distributor head removed, certain partsy being shown in vsection taken on the line 2-2 of Fig. 1.k

2o Fig. 3 is a longitudinalsectional View of a timer provided with speed responsive.

j mechanism for controlling theY timing of the ,spark, certain parts of the apparatus being common to the apparatus shown in Fig. l. Fig. 4 is a plan view of the apparatus shown in Fig. 3, with the distributor head and breaker plate removed, certain parts be ing shown in section taken on the line 4&4 of Fig. 3. v

Referring to Figs. land 2, designates a timer cup which cooperates with a distributor head 21 to provide a housing inclosing the timing and distributing mechanism. The timer includes a breaker plate 22 journaled upon a boss 23 projecting up from the bottom of cup 20. The plate 22 is rotated by a handle 24 connected therewith which projects through an opening on the side of cup 20. A stationary -timer contact 25 mounted on an adjusting screw 26 is threaded into a bracket 27 which is attachedto the late 22 but Ainsulated therefrom. hracket 27 is attached to a stud 28 which projects through the plate 22 andthrough a curved slot 29 in the bottom of the cup 20.

with a flexible wire 30 for making connection with the primary circuit of an ignition system. The timer contact 25 cooperates with a movable contact 31 carried on the 33 upon the plate 22. The lever 32 `carries a Y rubbing block 34 which cooperates4 with a.

-timer cam to be described. A spring 35 hav- 55 inghone end engaging the lever 32, the other I when separated by the timer cam.

The lower'end of the stud 28 is connected end of a breaker ]ever 32 which is pivoted at end engaging a post 36 attached to the plate 22, and an intermediate portion coiled around the hub 37 of.leve 32 causes the contacts 3l and 25 to be engagedexceptco The distributing mechanism includesa vcenter contact 40 and a circular row of contacts 41 which are each connected with a pointed member 42 projecting into a sleeve 43 extending from the head 2l. Each sleeve 05 I 43 receives an insulated cable 44 which is retained by means of a wire split ring 45. The stranded conductor of the cable is engaged by the pin 42. In order to conduct a sparking impulse from the center of the contact 40 to anyof' the contacts 41, there is proyvided a leaf spring member 46 held in en is constructed for a four-cylinder engine. the

flange 5l will be substantially rectangular as shown in Fig. 2; 'for a six-cylinder engine, this flange would be hexangular. The body is provided with an internal flange 52 which includes an arcuate portion and a fiat. portion 53. This metallic body 5() is permanently attached to a nonconductiug rotor which includes a hub 56 and an arm 57 which carries the insert 49. Preferably, the .lo

rotor. 55 is constructed of molded material preferably a phenolic condensation product such as bakelite. The parts 49 and 50 are placed in the mold and the material forming the rotor 55 is introduced into the `mold so that when the rotor 55 has become' a solid vbody by methods usually employed iu molding articles from bakehte, e parts 49 and 50L will be permanently attached to kthe rotor 55.

. loo A. sha-ft is journaled inthe shanlcl of the cup 20 and is .provided with a shoulder 62 which rests upon the end of the boss 23 and sup orts `the 'rotor 55.' The shaft 60 is rovi ed witha portion 63 which is 105 shape so as to be received. by the socket in the rotor 55 provided by the internal flange 52 of the member 50. The portion 63 is provided with flat surface engaging-the flat portion 53 of the flange 52 to vprovide a driv- ,11"

To change thetime of .separation of con- I tacts 3l and 25, the plate is rotated by means of the handle 24.. Plate 22 is retained from the bottom of the surface of cup by means of screws extending through curved slots 66 formed in the bottom of cup 20 and threaded into the plate 22. A spring washer 67 is'located between the head of the screw 65 and the bottom of the timer cu Idy making the timer cam integral with the distributing rotor, the number of parts has beenrcduced and the relation between the timer cam and distributing segment can be permanently fixed so that `during the use of apparatus there is no liabilitythat this relation will bechanged.

The rotor S5-is susceptible of use with different types of ignition timing apparatus, and one other type is shown in Figs. 3 and 4. In this form of timer the braker plate 70 which carries the timer contacts and braker lever 32, is fixed with relation to timercup 71, and 'variation of the timing ignition is effected by changing the relation ofthe rotor 55 with respect to the driving shaft 72. This change of relation is effected in 'response to variations in speed by mechanism which includes a weight plate 7 3 attached to the shaft 72 and carrying a plui'ality of studs 74, each providing Ia.`fulcrum for a weight member 75. Eachweight inemher l75 has a tail portion 76 for engaging -an arm 77 projecting radially from a hub 82 which isjournaled -upon a reduced portion 7 2 of the shaft 72. Each arm 77 carries a stud 78'connected by a spring 79 with a stud 74. The vhub 82 is provided with al shoulder 80 which supports the member 50 of' the rotor 55 Aand .is .provided with a'n eX tension 81 which has the same function as the portion 63 of shaft 60 shown inF ig. 1. The hub 78 drives the rotor 55 and is driven bythe shaft 72 by means of the engagement of the tail portion 76 with the arm 77. .As-

the speed qt' the shafty 72 increasesthe weights 75 cwill move away from the shaft and cause argm 77 to be rotated clockwise with relation to the shaft 72, Ias viewed in Fig. 4. y.In this manner, the timing of the..

ignition is advanced as the speed of shaft 7 2 increases. As the speed 'decreases the mechanism is restored to position shown in Fig. 4 .through the action of springs 79.

While the form of embodiment of the pres-V ent 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. Ignition timing and distributing apparatus comprising, in combination, a driving y shaft, a breaker lever, a distributor head, a metallic cupped member detachably engageable with the end portion of said shaft and directly driven thereby and having an annular flange shaped to provide a timer cam, a non-conducting distributor rotor body having a hub projecting within the cupped member and driven thereby, and a distributing conductor attached to said body.

2. Ignition timing and distributing apparatus comprising, in combination, a driving shaft, a breaker lever a distributor head, a metallic cupped membdetachably engageable with the end portion of said Shaft and directly driven thereby and having an .annular flange shaped to provide a timer cam, a body of phenolic condensation product molded to said cupped member, and a distributing conductor attached to said body. F

3. Ignition timing and distributing appa-- ratus comprising, in combination, a driving shaft, a breaker lever, a distributor head, a.

metallic cupped member having yan internal shaft, a breaker lever, a distributor head,`

a. metallic cupped member having an internal `annular flange shaped to directly receive and be driven by an 'end of said shaft, and having an external annular l flangeshaped to provide a timer cam, a body of phenolic condensation product having a hub portion molded between said flanges' and having an arm portion, and la distributing conductor attached to said arm.. f

*In` .testimony whereof I .heretoaflx my signature. r

' HARRY E. NoRvlEL.'

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