US1757046A - Variable nose cam - Google Patents

Description

May 6, 1930. M. c; HORINE. r I 1,757,046

VARIABLE NOSE CAM I Filed Feb. 27; 1929 2 Sheets-Sheet 1 l May 6, 193Q. M. c. HomE 1,757,046

VARIABLE NOSE CAM Filed Feb. 2'7, 1929 2 Sheets-Sheet 2 Patented May 6, 1930 ATE QF f M-ERRILL gc) QRINE; 0F 'NEw"YoRiz,"-N; Y.,'AfssIGNoIt'ro INTERNATIONAL MOTOR COMPANY, or NEw'YoR'K, .;Y,, A coRPoRATIo OF DELAWARE V VABIABVL'E Nose CAM,

Application. filed February'27, .1929. Seri al No, 342,043. I

The present invention 'relates to expanding or var able nose cams and embodies, more s aeclficall a cam the nose of whlch ma be 7 7 expanded or varied during the continuous operation of the cam without lnterrupting the function which it accomplishes.

In many instances it nis desirable tova ry the characteristics of a cam during the'operar' tion thereof This is particularly so'in 'connection with engines operatingat high speeds where the opening ofthe valves is required 7 to be of greater duration than the opening required for low speeds. It will thus beseen that it would be very desirable to have "a cam nose of greater width for use during lilgh speeds than that for use underilow speedfconditions. In low' speed engines, where jthe torque is great, the cam nose should'be narrow" to decrease the durat1on;oftheopen1ng ofthe valves.

An object of during rotation thereof, thus not affecting the operation of the engine, and adapting the cam to the desired condition of operation.

A further object of the invention is toconnection which is operatedby asliding rod within such driving part: By sliding the rod axially of the driving part, the movable caln element can be rotated and advanced into or away from the other element to vary the constructed in accordance with the present invention, the nose thereof being adjusted to its smallest width.

rotation.

the accom- Figure Q is an end view, taken from the-left inFigure 1, justed to its s'inallestwidth.

Q Figure3 is a view similar to'Figure 2 showingthe' cam nose expanded from the position shown 1nF1gure'2. v 1 f qFl'gure 4. IS a plan view, similar to F igure and showing; the cam nosea'd- 1, showing the cain noseeXpandedas in .Fig- I V Referring to the above drawings, a designates a driving sleeve to which is keyed, a i j V collar al ,Abutting against the collar and the present invention is to provide a cam which is automatically variable keyed to. the sleeve a, is a cam section b,-this section being formed of a hub b and a cam segment 5 The cam section his keyed to the sleeve at, b and'the outer face, thereof is helically formed as at b", as shownin Figure 7. The outer face merges into the outer edge of the cam segment b the latter being formed with a grooveb a Aligned with the canisection Z; is a cooperating cam section 0 having a cam segment 0 This segment is formed with a tongue '0 the segment and tongue being adjacent the helically formed face of the cam sectionb.

The face 0 of the cam sectionjc is helically, formed to cooperate with the corresponding face 12 of the cam section b. It will be seen that relative rotation of one section with respect to the other will advance ,the tongue c into the groove I or retractthe sa1ne 'therefrom inaccordanceWith the directionof such; V Such movement will be accom panied by a slight axial movement time of the sections with respect to the other but the effective breadth of the will'not be. varied materially by suchmovement."

iFigures 2 and 3 illustrate the manner in which the cam nose may be expanded orv aried and the meansffor efiecting such-ex pension duringoperation of the cam will now be described. Within. the sleeve fla, operat ing rod Z is sliclably mounted. A slot a lying in a radial plane of the shaft (Z is formed in the sleeve a and acnrved groove ation'of the device will be quiteapparent";

since axial movement of with respect to the driving sleeve acansesthe keyeto hem ved wi in the l t t uch m iement is purely axialwith respect to the sleeve a and cam section I h t nosefogt the key ag the er espondins s d f r e nd efies si elu rentia m em t the o with respect'to the sleeve qi and'cam; section h rst-r lati e qta-tion b e n the am et enz e es ithe to e pa et a t the cam in accordance with the direction of movem n o h ha t- I Prec icath haft d m y b utoma al y I b in a cordance with the speed of the engine; as by mean 'e a fl wh l r e h form of s e e p ns v -de i e 1 Although the invention has been described n oimec en with th pec fi n tru e shown in the accompanying drawings; it is -HQ be l m ed, v a define in the ppe e d-e ai 1 '1 l sh m a m i vent m 1, A variable nose cam comprising hole w ri ing m mbe e ativel eb e Cam f elements mounted onthe driving member on of aidslem nt ein k ye to h d -l s member and the other provided with acurved sree mi nt rnal Periphery e e i m eet ons n he' elem nts, an'exiel tending slot in the driving member, an operinsre s t i n menb 'r d kev on the rod movable in the slot and engaging the groove to vary the telescoping of the am S ct on A vafahle nose cam comprising a holow dri ing me b a ax y end 10b relatively movable cam elements mounted on the driving member, onexof said elements being keyed to the drivingmember, opposed cam sections on the elements, op-

' posed helical faces on the elements, a curved groQ-Ye the other element, an o erqri oain the,driving member, and a key on the ne rzti s red t e vable 2 t e s a a d 1 seems the e ,3. variable nose cam comprising a .hol-.

0w drivingmemher, an ax y exte ding.

a the ein, ela ively m wb ?e el ment wa e -a the se s memb r; nee $2 1 1 m nts b ing ke to he r ng mem er h enien -seesaw;

groove in the other element, and a key on the operating rod movable in the slot and engaging the groove.- I 4.]A variable nose cam comprising a hollow drivingmember, an axially extending slot therein, relatively movablepam elements mounted the driving member, one of said elements being keyed tothe drivingmember, 'oppos ed cam sections on the elements, an operating rod in the-driving member, and. a; connection iii-the slot betweenthe rod and the other of said elements to move one of thecain sections circumferentially with resheet fie the e er: 7 I a 5'. 'A'variable nose camcompri'sing a hol- QW: de ise m mbe a a m n lqr h me? sa e siedef ar mlity lativelyeev hl el ee e b n ed l e th rivi m mb r i s i sai l ment -b keyed $0, the driving member, an operatmg rod in the driving- .membega movable key n the M ndi'ehgl si ie he 50 a d s a re reeve e the ether ele i Q t e s e 6.- A r eble was em ess hel low drlylllg memb r, anhax aly eXi mli ri 1a th e n; scamerme f a plu ty 9f rela i ely mete el ment m te driving-member, one off said elements being .7 ved fie t dri n lie reb s spewin rod :inthe, driving member, and, means in the to. o .drivh membe -Q hi ficfition signed mqvethe last'f i dfelement w t at s.

23rd day of 1929. a j

ME RILL s re February, A.

sloteqnncting theother element'and.therogl

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