US 1527456 A
Description (OCR text may contain errors)
Feb.. 24. 19.25. 11321456 E. WOYDT ET AL VALVE OPERATING MEANS Filed Feb. 29, 1924 Patented Feb. 24, 1925.
UNITED STATES PATENT oFFlcE.
vEDFAIRD WOYDT .AND DEJOE CSANDY, F DETRDIT, MICHIGAN.
'. Application led February 29, 1924. Serial No. 695,981.
To 'whom t may concern ".Be it known that we,`EDWARD Worn'r, a
ing mechanism and has special reference to a cam action that may be advantageously used in connection with high pressure internal combustion engines, especially of that type in which the liquid fuel, asl gasoline, is delivered to the combustion chambers or cylinders of the engines.
The primary object of our invention is to provide a set of cams for operating a single valve member, one of the cams having a constant action and the other a variable action, whereby compreion ratio of an engine may be changed during the operation of the engin Another object of our invention is to provide valve operating means including a cam within a cam and no'vel means for adjusting the inner cam whereb it may have a valve opening action in a Vance or behind the outer cam. i A further object of this invention is to provide a set of cams for operating a valve member with the cams arranged to be actuated in synchronism or one cam in `advance of the other with reeiprocable means for adjusting one of said cams. The above are a few of the objects attained by our invention and others will appear as the nature of our valve o erating be means is better understood, by ai of the accompanying drawing and the. following description. A
vIn the drawing,
Figure 1 is a bottom plan of one form o valve operating mechanism in accordance with our invention;
Fig. 2 is a side elevation of a valve member engaged by two cams adapted to cooperate in actuating the valve member;
Fig. 3 is a similar view showing one of the cams positioned to follow the action of the other cam;
, Fig. 4 is a vertical longitudinal sectional vewillustrating another form of our invention wherein one cam is within the other;
Fi 5 is a cross sectional view taken on the line V--V of Fig. 4 showing the cams arranged to operate together; l
Fig. is a similar view showing theinner cam adjusted relative to the outer cam;
Fig. 7 is a longitudinal sectional view cfa y hollow cam member; Fig. 8 is a cross sectional view of Same;
Fi 9 is. a longitudinal an a justable cam;
sectional view of Fig. 10 is a cross sectional view of the Same;
Fig. 11 is a longitudinal sectional View of another form of hollow cam member;
Fig. 12 is a cross sectional view of the same;
Fig. 13 is a vertical longitudinal sectional View illustrating a further modification of our invention, vand Fig. 14 is a cross sectional View taken on the line XIV-XIV of Fig. 13.
Reference will first be had to Figs. 1 to 3 inclusive showing a bearing 1 for parallel cam shafts 2 and 3 provided with cams 4 and 5 respectively adapted to actuate a puppet valve member 6.
On the cam shaft 2 is a long pitch or spiral gear wheel 7 meshing with a similar gear wheel 8 on a driven shaft 9.
v Telesco ing the end of the cam shaft 3 and slida le thereon vand adapted to rotate with said shaft is a sleeve 10 having .one end provided with a small spiral gear wheel 11 meshing with the gear wheel 7, so that the shaft 9 may drive the cam shafts 2 and 3 and simultaneously operate the cams 4 and 5, which if in the relation shown in Fig. 2, will cooperate in actuating the valve mem- Loosely connected to the sleeve 10 is a yoke 12 carried by an adjustable rod 13 in the support 14 provided with means 15 for holding the rod 13 in adjusted position. During the operation of the cam shafts 2 and 3 the adjustable rod 13 may reciprocate the sleeve 10 to move the spiral gear wheel 11 longitudinally of the spiral gear wheel 7 larit of the cam 5 relative to the cam 4,
for instance as shown in Fig. 3, where the cam 5 lags behind the cam 4 considering the shafts 2 and 3 driven in an equalized direction. This means that the cam 4 initially actuates the valve member and is followed by the cam 5, thus prolonging the actuation of the valve member. If the valve member controls a puppet valve such valve will be held open for a period of time greater than that caused b the cams 4 and 5 operating together, as s own in Fig. 2. 4
In Figs. 4, 5 and 6, we show another form of our invention wherein a bearing 16 supports the hub portion 17- of a gear wheel 18 driven from a gear wheel 19 on a drive shaft 20. Mounted in or integral with the hub portion 17 of the gear Wheel 18 is a tubular hollow cam member 21 having a portion thereof pressed out to form an outer cam 22 which is slotted, as at 23 to provide clearance for an inner cam 24. The inner cam 24 is slidably keyed relative to a shaft 25 which extends axially of the hollow'cam member 21 and is slidably keyed in a spiral member 26 ad'ustable axially of the gear wheel 18, sai spiral member having a threaded engagement with the gear Wheel which permits of the spiral member being driven by the gear Wheel and at any time during the rotation of the gear wheel adj usted therein. The spiral member 26 serves practically the same purpose as the small spiral gear Wheel 11 previously mentioned, and at the outer end of the spiral member 26 is a yoke 27 carried by an adjustable rod 28 in a support 29, the elements 27, 28 and 29 being similar to the elements 12, 13 and 14 previously described.
During rotation of the gear wheel 18 the spiral member 26 may be adjusted to change the angularity of the cam 24 relative to the cam 22, as best brought out in Figs. 5 and 6.
In Figs. 7 and 8 we show the cam member 21 outpressed to form a cam 3() and a somewhat similar cam may be formed, as shown in Figs. 11 and 12 by slitting the cam member 21, as at 31 and pressing the slitted portion outwardly to form a cam 32.
Figs. 9 and 10 show how the cam member 21 may be slotted, as at 33 to provide clearance for a cam 34 on the shaft 25.
Considering Figs. 13 and 14, the cam member 21 has a longitudinal slot 35 providing clearancefor a beveled cam 36 radially disposed on the shaft 25. The shaftl 25 may be adjusted relative to the spiral member 26 by 4an adjusting rod 37 loosely connected to said shaft and held by a support 38 provided With a locking device 39. The beveled cam 36 is adapted to engave the edge of the valve member 6 and it 1s obj vious that the shaft 25 may be shifted longitudinally of the Vcam member 21 to vary the action of the cam 36 relative to the valve member 6. By the sliding of the said cam 36 towards the valve member 6it may be brought into actuating position and thereby lronodify the operation of the said cam mem- It is thought that the operation and utility of our invention will be apparent without further description, and while in the drawing there are illustrated the preferred embodiments of our invention it is to be understood that the structural elements are susceptible to such variations and modifications as, fall within the scope of the appended claims. V
What we claim is 1. In a valve operating mechanism, means for the operation of a single valve comprising a tubular cam sha-ft having a valve operating cam thereon, and a further cam adapted to be reciprocated into operative position modifying the operation of said first mentioned cam.
2. In a valve operating mechanism, a pair of cams adapted to the combined operation of a single valve, one of said ca ms being axially reciprocable but of operative 4relation to the other of said cams, and means effecting the reciprocation of said reciprocable cam.
3. The combination With a valve member, of two cams adapted to engage and operate saidvalve member, cam operating means, and means coaxially of the operating means of one of saidcams for reciprocating the other cam into and out of operative relation to said valve member.
In testimony whereof we aHx our signatures in presence of two Witnesses.
EDWARD WOYDT. DEJOE CSANDY.
KARL H. BUTLER, ANNA M. Donn.