US1983794A

US1983794A - Ignition tehee

Info

Publication number: US1983794A
Authority: US
Publication date: 1934-12-11
Anticipated expiration: 1951-12-11

Description

Dec. 1.1, 1934. J. T. FlTzslMMoNs IGNITION TIMER Original Filed Nov. 18, 1927 I section certain elements, substantially .carrying plaie 22 Patented Dec. l1, 1934 UNITED STATES PATENT OFFICE by meme Wration, ware assignments, to General Motors Cor- Detroit, Mich, a corporation of Dela- Original 'application November 18, 1927, Serial No. 234,100. Divided and this application July 11, 1931, Serial No. 550,164

5Claims.

This invention relates to an ignition apparatus for internal combustion engines and more particularly to the type of ignition timer which has circuit interrupters operated by a single engine driven member, as disclosed 'in my copending application, Serial No. 234,100, filed Nov. 18, 1927, and of which this is `a. division.

One of the objects of this invention is to provide improved means for lubricating the timer.

A further object of the invention is to provide means for lubricating parts having arunning nt, including means to cause relative movement between the parts toaid in such lubrication.

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

In the drawing: l

Fig. 1 is a vertical sectional view, involving the instant invention, substantially as indicated by the line and arrows'l-l of Fig. 2.

Fig. 2 is a plan view of the same, with the distributor head removed, it being a view substantially as indicated by the arrow 2 of Fig. 1.

Fig. 3 is a sectional view substantially as indicated by the line and arrow 3-3 of Fig. 1, and

Fig. 4 is an enlarged detail view, showing in as indicated by the line and arrows 4--4 of Fig. 1.

The ignition timer housing 20 supports a drive shaft 21 to which is drivingly connected a weight carrying a plurality of weight pivot pins 23. Each pin 23 pivotally supports a weight plate 24 which slides across ridges or elevated portions 25 formed in the supporting plate 22. Each weight 24 has an arm 26 for engaging a cam arm 27 of a lever 28 which is drivingly connected with a sleeve or hollow shaft 29 which is formed to provide a cam 30 and a cylindrical extension 31. Each of the arms or cams 27 has a spring stud 32 connected by spring 33 with the weight pivot stud 23. These springs tend to maintain the weights 24 in innermost position adjacent the sleeve 29, which sleeve is rotatable upon an extension 35 of the shaft 21 and thus restrain rotation of the cam 30 relative to the shaft 35 in such direction as to advance the timing of the ignition spark as the weights move outwardly with increasing speed.

The cam 30 cooperates with a plurality of circuit interrupters supported by a main plate 40, having upright ears 41 by which the plate 40is attached to the inside of the timer cup 20 by screws42. Each interrupter includes an L-shaped block, comprising (Cl. 74-5l 68) rubbing block 43 adapted to be engaged by the cam 30, the rubbing block being attached by a rivet 44 to a breaker lever 45 having a non-conducting hub 48 pivoted upon a stud 47 attached at 48 to the plate 40, all as is fully described in gy copending application hereinabove referred The present invention provides for the lubrication of the cam surface, this is accomplished by providing the cam shaft 29 with a radially extending hole 120 which will be located slightly below the upper end of the drive shaft extension .35 when the parts are assembled as shown in Fig. 4. The cylindrical bore of the sleeve 29 above the end of the shaft extension 35 contains a wick of fibrous material 121 saturated with lubricating oil. By capillary attraction oil from the wick 121 is fed as needed to the cam shaft re- -ceiving surface of the shaft end 35, and some of this oil passes through the radial passage 120, and by centrifugal force finds its way to the outer surface of the cam 30 where it serves to lubricate the rubbing blocks of the interrupters, and reduces wear on the cam and rubbing blocks. It is desirable that the'passage 120 be located below the end of the shaft extension 35 so that the progress of oil from the wick 121 to the passage 120 will be retarded.

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. In an ignition timer having a cam rubbing block, the combination of a hollow shaft providing a earn, and having a transverse pamage leading from the interior of the shaft to the rubbing-block-engaging surface of the cam, a ilbrous body saturated with lubricantand located withintheshaft,adrlveshaftreeeivedbythe camshaft engaging the nbrous body, said drive shaft extending above the transverse passage for retarding the passage of lubricant from the fibrous body to the passage, said drive shaft having a running nt with the cam shaft.

2.Inanignitiontimerhavimacamrubbing block, the combination of a hollow shaft providing a cam, means for lubricating the rubbing a transverse passage leading from the interior of the shaft to the rubbingblock-engaging surface of the cam, a fibrous body saturated with lubricant and located within theshaft,adriveshaftreceivedbythecamshaft tosupporttheiibrousbodnandsaiddriveshaft e for I8- the fibrous tarding the passage oi lubricant from body to the passage, said drive shaft having a running t with the cam shaft.

3. In an ignition timer having a cam rubbing block, the combination of a hollow driven shaft supporting a cam, said shaft having a passage leading from the interior thereof tothe rubbing block-engaging-surface of the cam, a drive shaft received by the hollow shaft-to form a chamber, said drive shaft extending across the pe of the driven shaft, and a iibrous body saturated with lubricant located within the chamber, said drive shaft retarding the ow of the lubricant from the chamber to the cam surface.

4. In an ignition timer having a cam rubbing block, the combination of a hollow shaft providing a cam, means for lubricating the rubbing block, comprising a transverse passage leading from the interior of the hollow shaft to the rubbing-blockengaging surface of the cam, a brous body saturated with lubricant and located within the hollow shaft, a drive shaft received by the hollow shaft to support the brous body, said drive shaft extending above the transverse passage for retardlng the passage of lubricant from the brous body to the passage, said drive shaft having a running ilt with the hollow shaft.

5. In an ignitiontimer having a cam rubbing block, the combination 'of a shaft providing a cam and having a chamber; said shaft having a s," w e leading from said chamber to the rubbing-block-engaging surface of the cam, a ibrous body saturated with lubricant and located within the chamber, and means rotatable within said chamber for holding the brous body beyond said passage, and said means cooperating with said shaft for retarding the flow of lubricant from theviibrous body to the passage.

JOHN T. FI'IZSIMMONS. 20