US1032978A - Governor for explosive-engines. - Google Patents

Description

P. G. ZUMDAHL. GovEBNoR PoR EXPLosIvB ENGINES.

APILIOATION FILED SEPT. 24, 1910. 16,

2 SHEETS-'SHEET 2.

` P. G. ZUMDAHL. GOVERNOR FOB. EXPLOSIVE ENGINES.

APPLIoATIoN HLED smi'. 24, 1910.

* Patented July 16, 1912.

2 SHEETS- SHEET 1.

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commun p UNTTED STATES PATENT OFFTCE.

FREDERICK C. zUI/IDAHL, OF ROCKFORD, ILLINOIS, AssIGNoR To ROCKFORD ENGINE WORKS, F ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

GOVERNOR FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented July 16, 1912.

Application led September 24, 1910. Serial No. 583,645.

To all whom it may concern:

Be it known that I, FREDERICK C. ZUM- nAI-IL, a citizen of the United States, residing at Rockford, -in the county ot llVinnebago and State of Illinois, have invented certain new and useful Improvements in Governors for Explosive-Engines, ot which the following is a specication.Y

The Object of this invention is to provide novel and effective means for automatically governing the speed of explosive engines.

ln the accompanying drawings, Figure 1 is a view in side elevation, parts being shown in section, which sect-ion is taken on dotted line b o Fig. 3. Fig. 2 is a partial rear elevation and section. Fig. 3 is a partial plan view and sect-ion. Fig. 4 is a section on dotted line a a Fig. 2. Fig. 5 is a section on dotted line Z) l) Fig. 3 of the governor portion only. A

The engine in the main is ot the usual construction and comprises the base 1, supporting the crank-shaft 2, to which are connected the fly-wheels 3 and 4. A cylinder 5 is supported by the base, and to it is detachably connected a head 6, which supports the intake 4and exhaust valves, also the ignition devices. The exhaust valve has its stem 7 surrounded by a coiled spring 8, which serves t-o hold t-he exhaust valve closed. A

Y bell-crank lever has one arm 9 located beneath the lower end ot the exhaust valvestern, and to the other arm 10 Ot this bellci'ank lever is pivotally connected a rod 13. To the crank-shaft is keyed a spur gear 14, and a spur-gear is idly mounted on a stud 16 extending from the base of the frame. These gears 14 and 15 are in constant mesh, and a Cam 17 is connected with the spur-gear 15 to rotate therewith. A rocker arm is pivoted to the base 1 on the stud 1S, and to the free end of the branch 19 of this arm is pivoted a roller 2O with which the cam 17 contacts. The other branch 21 of this rocker arm supports a block 22 formed with a notch 23.

To the frame ot the engine is pivoted a bell-crank, to one arm 24 ot which is secured a detent 25 in an adjustable manner by bolts 2G passing through slots 27 in the detent. A screw 28 is supported by t-he bell-crank and contacts with one end of the detent. The other end 29 ot' the detent is beveled and fitted to enter the notch 23. To the other arm 30 of this bell-crank is pivoted an arm 31 about midway ot its length, and to one end of this arm is secured a shoe 32, and to the other end ot this arm is connected a screw-threaded rod 33 supporting a nut 34. This rod 33 passes through an ear 35 extending from the bell-crank arm 24 and has a coil spring 36 surrounding it and located between the` ear and the end of the arm 31. Another coil-spring 37 is located between the nut 34 and the bell-crank arm 24.

To the inner side of one of the spokes of the fly-wheel 3 is pivoted a lever 38 at one end, and its other end has a connection with the fly-wheel through the spring 39, and is adjustable in connect-ion therewith by the screw-threaded rod 40 and nuts 41. This lever 38 has a projection 42 extending from it and lies within the path ot the shoe 32. As the crank-shaft rotates, the spur-gears 14 and 15 will be rotated which will rotate the cam 17. At each rotation ot the cam 17 it will contact with the roller 2O and rock the rocker-arm which will pull on the rod 13 and rock the bell-crank 9-10 thereby raising the exhaust valve stem 7 against the actie-n of the spring 8. As the ily-wheel 3rotates, the arm 38 will be carried with it which will bring the projection 42 in the path of the shoe 32, and if the {ly-wheel is rotating above normal speed, the projection will not contact with the shoe, owing to centrifugal torce. l/Vhen the fly-wheel is rotating below normal speed, the vprojection 42 will contact with the shoe 32 which will rock the arm 31, and through the spring 36 will rock the detent 25 so that 'its beveled end 29 will be held out of the notch 23, which will allow the rocker-arm to move, thereby allowing the spring 8 to close the exhaust valve, but when the projection 42 rotates tree of the shoe 32, a spring 43 will hold the detent 25 in the notch 23, thereby holding the Vrocker-arm stationary and hold the exhaust valve Open. lllhile the exhaust valve is being held open, no compression can take place wit-hin the cylinder, consequently no power will be developed, but when the exhaust valve is closed, compression can take place. By this arrangement, the exhaust valve is normally ield Open and permitted to close at the times an explosion is required.

I claim as my invention.

l. ln an internal combustion engine, the combination with an exhaust valve, of oper- `ating means therefor including a rocker zii-nn means for moving the rocker arm, t detel'it Controlling1 ,euch niovenient and Conipi'ising a pivoted level', an zii'ni pivoted to the lever, :t yielding Connection between the levell and znni that noi'inally beldey Said anni in :1 predetermined position, but permits the yielding movement ot the infin in both directions iiioin said noi-nml position, and a centrifugal device that operates on the nin to effectthe inoveinent of the detent.

ln an internal eoinbustion engine, the eoinliiinution with en exhaust vulvq of operating ineens therefor includingY a i'oelei aun, ineens for moving the rocker aun, a detent thatl engages the toeliet' infin to control its nioveinenft, Said detentcomprising t pivoteil bell crank lever, one arm of which engages the i'ooliei min, an alni pivoted between its ende on the other niin. of the bell crank level', :i spring interposed bet-Ween one end el" the pivoted zu'in and the bell crank, u bolteonneeting said, end ot' the arm and the bell (5l-zink, it nut on the bolt for moving` the arm against tbe notion of the spring and holding it in different positions, :i Spring intel-posed between the nnt and bell crank, und a oentiifngnlly operated device that engages the other end of the pivoted arm.

in testimony whereof l have hereunto setl my hand in presence of two Subscribing witnesses.

FREDERICK C. ZllhlDAl'lL.

lVitnesSes A. O. BEHEL, E. D. E. N. BEHEL.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. C.

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