US1724707A - Silencer for valve mechanisms - Google Patents

Description

Aug. 13, 1929. c, w, HALL 1,724,707

SILENCER FOR YALVE MECHANISMS Filed Oct. 1, 1927 Patented Aug. 13, 1929.

UNITED STATES PATENT OFFICE.

CHARLES WESLEY HALL, 01 DENVER, COLORADO, ASSIGNOR TO KANT-KLICK VALVE SILENCER COMPANY, A CORPORATION OF COLORADO.

SILENCER FOR VALVE MECHANISMS.

Application filed October 1, 1927.

My invention relates to valve silencers for internal combusition engines and is a companion to my invention on rocker arms for internal combustion engines, application for a patent .on which was filed October 1st 1927, Serial Number 223,347.

IVhile my invention on rocker arms may be applied to internal combustion engines which have overhead valve mechanisms and rocker arms as an accessory to replace ordinary rocker arms, or may be installed at the factory as a component part of the engine as manufactured, my present invention is adapted to be used as an accessory only.

It may, however, act as an accessory not only on overhead valve engines, but also on the L head, F head or T head types of engines; and though an accessory it may, of course, be installed as a component part of an engine as manufactured.

In the drawings Figure 1 is a side view of the form of my valve silencer used as an accessory for overhead valve engines provided with rocker arms.

Figure 2 is a top view of the same.

Figure 3 is an end view of Figure 1.

Figure 1 is a section on'the line 44 of Fi ure 1.

igure 5 isa view showing a rocker arm, part of a push rod and part of a valve stem assembled with my silencer and showing how the proper clearance is obtained in the mechanism.

Figure 6 shows a view of a form of my silencer as assembled with a portion of the valve stem, and cam follower of an engine that does not employ rocker arms, that is, one of the other types mentioned above.

Figure 7 is an end view ,of the silencer shown in Figure 6.

Figure 8 is a side View of another modified form.

Figure 9 is an end view of the same.

In the form shown in Figures 1, 2, 3, 4, and 5, the track 1 is provided with the counterbore 2 to receive the valve stem 20, and with the counterbored hole 14 which receives the roller bolt 12, and in which the Serial No. 223,348.

bolt 12 is slightly riveted to prevent it from turning.

The roller 10 is provided with the arc face 11 which rolls on the track 1. The roller*10 is also provided with the hole 13 through which the roller bolt 12 passes.

The roller spring 17 surrounds the roller bolt 12 and its pressure is adjusted by the knurled roller bolt nut 18 The guide 9 is riveted to the track 1 by the rivet 15, and acts to hold the silencer in line with the rocker arm, and to align the track 1 and the roller 10. The ball 6 of the adjusting screw 22, fits in the cup 7 on the push rod 21, the adjustment being locked by the lock nut 23.

In the modified form shown in Figures 6 and 7, the roller 10 is provided with the curved face 10, the curve being adapted to maintain approximately a right angle contact between the cam follower screw 22 and the roller 10 regardless of the position of the cam follower 21 or of the roller 10. The screw 22, locked by the nut 23, provides adjustment of the clearance in this form. Since in this form the silencer may revolve about the axis of the valve stem 20 without any efi'ect upon its action, the guide is made slightly different from that shown in the form mentioned above, as indicated at 9 in Figures 6 and 7, and merely acts to align the trackl and the roller 10.

In the modified form shown in Figures 8 and 9, the track 1, is formed with an arc face 11 and the roller 10 is straight for the length of its travel or rolling contact with the track, and has two overlapping edges 10 which act to guide it on the track 1, and the extensions 9' of the edges 10 acting to guide silencer on the rocker arm, in the manner similar to that of the guide 9 shown in Figure 5. The straight roller rolls on the are faced track with the same action, as far as valve silencing is concerned as the are shaped roller rolling on the straight track.

In the adjustment of my silencer, regardless of which form is employed, the valve adjusting screw is set to give the required clearance in thousandths of an inch between the roller and the part With which it contacts, the roller bolt nut 18 being meantime backed off till the roller spring 17 is perfectly free and the roller contacts against the track in line with its contact with the valve stem 20, giving solid metal to metal contact except on one side of the roller.

When all valves are thus properly set, the engine is run slowly and the roller bolt nuts 18 are screwed down, putting more and more pressure upon the springs 17, and hence holding the rollers against the tracks with a stronger and stronger resilient pressure until true rolling contact is obtained for the transition between the open and the closed positions of the valve and of the cam follower at all speeds. When this true rolling contact is obtained, the clearance between the partsv will be entirely taken up by the valve silencer in any position of the valve or of the cam follower, and at any speed,

and the result will be silent valve operation.

Thatis, when the valve is closed, the heel 24 of the roller 10 (see Figure 5) will be in solid contact with the track 1 as shown in Figure 6.

When the valve is open. the roller will be in. theposition shown in Figure 5, but with the rocker arm in solid contact therewith.

The drawings. are slightly exaggerated forthe sake of clearness.

And the transition from either one; of

these two positions tothe other position will be by means of the rolling contact between the track 1 and the roller 10.

with rocker arms.

I. have shown some few modifications' but am well aware that there are others which an. intelligent mechanic might perceive once my nvention had been disclosed to him. For nstance, the form shown in. Figures 8 and 9 might be combined with the-form shown in F iguresfirandl', so that the straight roller and the curved track might be used on other than rocker arm engines.

01', the roller might be provided with a cup to receive the ball of the adjusting screw 22 of the rocker arm, and the pushrodcup 7 might be eliminated. made to fit into a borein the track l of-the silencer. Or, various other modifications or combinations might be made.-

So, I do-not wish to be narrowly limited.

in. my protection to the exact forms, constructions, dimensions, proportions and designs. shown, but what I claim as new, and" Letters Patent, is as desire to protect by follows-:-

12. Means for silencing a valve mechanism.

stem, a base member, a rocking member and the push rod 21" adapted to rock upon said base member, spring means for forcing one extremity of said rocking member toward said base member, and a guide engaging the sides of said rocking member and maintained in alignment with said base member, said guiding means arranged to. contact with said rocker arm so as to maintain said base member in alignment therewith.

2. Means for silencing a valve mechanism having a rocker arm; comprising a valve stem, a base member adapted to rest upon said valve stem, arms extending upwardly from said base member into contact with the sidesofsaid rocker arm so as to maintain said base member in alignment with said rocker arm, a rocking member adapted to rock upon said base member and pass under said rocker armv adjacent its. one extremity; and spring means arranged to draw the other extremity of said rocking member toward said base member.

3. Means for silencing a Valve mechanism having a rocker arm; comprising a valve stem, a base member adapted to rest upon said: valve stem, armsv extending upwardly from said. base member into contact with the sides of-said rocker arm so as to maintain said base member in alignment with said rocker arm, a rocking member adapted torock. upon said base member and pass under said rocker arm adjacent its one extremity and spring means arranged: to draw the other extremity of said rocking member toward said base member, said rockingmember being enclosed by said arms so as to be maintained in alignmentwithsaid base member;

4., A silencer' for valve mechanism comprising: a. base member arockin-g member adapted to rock upon the upper face of said base member;-al spring arranged to hold one extremity of'said rocking member normally against said? base member; and means for maintaining the other extremity of saidrocking; member inv alignment with said base member;

5. A silencer for valve mechanisms-bommaintaining the other; extremity of said" rocking member in alignment with said'base member, saidi means COIIlpIlSlIlgi arms extending upwardly at eachside of saidbase" member: so as; to enclose one extremity of said rocking member.

6. Mean-s for silencing a valve mechanism having a rocker arm, comprising a valve stem, a base member adaptedtorest uponsaid valve stem; arms extending upwardly from. said base member into contact with the sides of said: rocker armso as to-main-- tain said base member in alignment with maintained in alignment with said base said rocker arm, a rocking member adapted member, said means comprising: a U-shaped 10 to rock upon said base member and pass clip adapted to pass under and upwardly under said rocker arm adjacent its one exfrom one extremity of said base member so 5 tremity; and spring means arranged to draw as to maintain said rocking member between the other extremity of said rocking member its two sides. toward said base member, said rocking mem- In testimony whereof I afiix my signature. ber being enclosed by said arms so as to be CHARLES WESLEY HALL.

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