US1847899A - Ignition assembly - Google Patents

Description

March l, 932. RABEZZANA 1,847,899

IGNITION ASSEMBLY Filed July 17. 1929 2 Sheets-Sheet l gfvvento/v iwf fm a@ en/Umm, WML/f Grammy March 1, 1932. H, RABEZZANA IGNITION ASSEMBLY 2 Sheets-Sheet 2 Filed July 17, 1929 `somewhat modified form.

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those leads, forshielding the high tension portion of the ignition system, wholly or in part, which shielding is 'of particular importance in the case of aeroplanes or motorv vehicles equipped with radio receiving sets. The invention also aims to improve the appearance of the power plant. Other-objects and advantages will be understood vfrom the following description.

ln the drawings, Flgure 1 isa view in'end elevation of an engine `.equipped with my invention, the view being broken away and 2'0/ partly in section.

Fi re 2 is a transverse section, the coil being s own in elevation.

Figure 3 is a top plan view. Figure 4 is a view in side levation.

Figure 5 represents a sectional view of a l Figure`6 is a transverse sectional view of the further modification.

ated with driven mechanism. At 9. is shown one ofthe usual series of spark plu s, the '.35

spark plug bein shown as positione with- 1n the contour o the engine and enclosed by "a cover 1-1. 'In addition to excluding dust,

y moisture and oil, this cover shields the spark tension currents cannot transmit electrical energy in a way to interfere with the radio receiving set' carried by the vehicle. This cover also shields apart of the high tension leads extending to the'spark plugs as will be seen from an inspection of ,Figur-e1. The

ignition system employs agenerator 12, a contact breaker 13, for the low potential current and a coil 15. The primary coil winding is ,supplied by a battery, as usual, and represented conventionally by numeral 17. The

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secondary current of the coil supplies the 'spark plug leads through a distributor. In

'accordance with the vusual practice a driven shaft operates the breaker device and the distributor, the breaker device and the distributor usually constituting lone unit and fref quently mounted adjacent the generator. With this conventional arrangement-a somewhat longl electrical leadA extends from the secondary winding of the coil to the distribu-A tor and a group of wires extend from the-distributorto the several spark plugs. The appearance is far` from neat. At present attempts arebeing made to cleanup the appearance` of the engine accessories and my improved ignition system goes a long way toward that end. lt alsopkeeps out dust, oil and moisture from the parts of this system.- It reduces capacity losses and shields the whole secondary system.

In -making the improvement the breaker f devicev may be separated from the distributor and it may be as shown `in the drawings located adjacent the generator as is common` ly done since in thisposition drive mechanism is accessible. Secured within the cover -11 by fastening means 21 is a bakelite Strip23 extending lengthwise along't-he engine block'.

The ignitionwires may bein 'the form of uninsulated wires imbedded inthe bakelitc strip as'shown at 22. From the imbedded wires light spriiigs 25 may extend .to make contact with the several spark plugs. If it be desired to vomit the bakelite strip, insulated wires, as usual, may be used within the cover. and secured thereto. Carried by the cover 11 and' mounted 'on an outward extension of the bakelite strip, when such a strip is used, plugs so that the parts thereof carrying higlris the coil 15. A secondary winding of the lcoil has a terminal 27 engaging a rotatable plate 29 carried by an insulating member 31. This member 31 is mounted on end 33 of a vrotor 3'5 journalled within stem 37. To the stem 37 is secured as by a cap 39 a flexible shaft housing 41. Within thls housing is a fieXible drive shaft 44 rigidly fixedwith'the rotor 35. The shaft 44 with its housing 41 for rotating shaft 44 may be taken from any convenient part of the driven mechanism of the engine. The several spark plug leads 22 terminate in contact points 43 which are engaged'in sequence by rotating member 29; these parts constituting the distributor.

By the arrangement described above, including the location of the coil 15 and the distributor, the high tension system from the .coil through the distributor to the plugs is greatly reduced in length with a consequent avoidance of loss of capacity.1 The major parts of the leads Within the cover are shielded whereby interference With radio receiving sets is avoided and the appearance'is greatly improved. The collection of leads extending from the distributor to the plugs is done away With. In the act of assembling the cover and the bakelite strip the spring arms 25 firmly contact with the several plugs and no trouble occurs such as is commonly the case due to breaks in the insulation 0f the leads or misplaced cablesi The coil positioned as it is on the bakelite strip serves as a convenient cover for the distributor. In the event that even more complete shielding be desired, the expedient shown in Figure 5 may be adopted. In this' form in addition to the features already described the bakelite strip is itself covered With a metallic coating as by plating with copper for example. By this provision a complete shielding of the high tension Isystem Vis effected.

Figure 6 shows a simplified form in which the invention `may be embodied. Here a cover 11` carries secured thereto a bakelite strip 23 by `fastening means 21. In this bakelitel strip are imbedded high tension leads as before with resilient contact members 25 for engaging the spark plugs 9. This simple form-effectively improves the appearance of the engine and furnishes a ready and convenient Way of assembling and removing the high tension system. It also serves efiiciently to shield the larger part of the high tension system although the idea is not as fully de- 4veloped as inthe form shown in the other figures. l

I claim:

1. In an ignition system for engines', having sparkplugs, a cover for said spark plugs, a strip of insulating material supported on said cover, high tension leads imbedded in said strip, and resilient contact members carried by said strip in electrical contact with said leads and positionedto firmly Contact said plugs when the cover is placed in position, together With a distributor carried by and within said strip, and means driven by theengine for operating said distributor.

2. An ignition system for multiple cylinder explosive engines comprising a strip of insulating material, high tension leads imbedded therein, resilient spark plug contact members carried thereby, a distributor carried by and within said strip, said distributor having a rotary engine driven part, a coil positioned over said distributor and means to secure said strip in position Whereby the several spark plug contact members engage the several spark plugs, said last named means being a cover to enclose the engine spark plugs and the resilient contact members.

3. In an ignition system for engines having spark plugs, a shielding cover for said plugsyastrip of insulating material secured.

to and Within said cover,vsaid strip of 1nsulating material having an extension outside

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