US898074A - Governor and reversing-gear for engines. - Google Patents

Description

PATENTED SEPT. 8, 1908.

2 SHEETS-SHEET 1.

.726 veznior W. N. SPRINGER.

APPLICATION FILED MAY 2, 1900.

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GOVERNOR AND REVERSING' GEAR FOR ENGINES.

2 SHEETSSIIEET 2.

PATENTED SEPT. 8

GM E N I G N E R 0 F .R BA BB G G MN M R W E WE D N A R 0 N R E V 0 G APPLICATION FILED MAY 2, 1900.

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WILLIAM N. SPRINGER, OF PEORIA, ILLINOIS, ASSIGNOR TO AVERY MANUFACTURING COMPANY, OF PEORIA, ILLINOIS,'A CORPORATION OF ILLINOIS.

GOVERNOR AND REVERSING-GEAR FOR ENGINES.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed May 2, 1900. Serial No. 15,258.

T 0 all whom it may concern:

Be it known that I, WILLIAM N. SPRINGER, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Governors and Reversing- Gears for Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to means for operating the main steam valves of engines, especially adapted for use in connection with traction engines in which it is desired both to govern the speed of the same, or of the main shaft when used for power purposes, and also frequently necessary to reverse the engine.

My invention comprises an automatic centrifugal governing mechanism whereby the steam admission valve of the cylinder is constantly controlled for maintaining the engine at a predetermined speed, with the most economical consumption of steam and fuel, and also combined therewith a manually operated mechanism whereby, at the will of the engineer, the eccentric, operating the steam valve and controlled as aforesaid by the automatic centrifugal governing means, may be shifted or reversed without interfering with the operation of said governing means or the mechanism comprised therein, with the result that the direction of rotation of the engine may be changed as desired.

The invention consists in the parts and combinations thereof hereinafter set forth and pointed out.

In order to make my invention more clearly understood I have shown in the accompanying drawings means for carrying the same into practical effect, without limiting my improvements, in their various useful applications, to the particular construction which, for the sake of illustration, I have deline'ated.

In said dranings-Figure 1 is a side and 2 a plan view of a traction engine embodying my invention. Fig. 3 is an elevation on a larger scale of the eccentric carrying part, wheel or disk, showing also the means for automatically controlling said eccentric. Fig. 4 is a similar view from the opposite side of said disk or wheel. Fig. 5 is a longitudinal sectional view of the same, showing also a portion of the manually operated reversing mechanism. Fig. 6 is a plan view of the latter mechanism, or the principal portion thereof. Fig. 7 is an inner end or face veiw of one of the collars comprised in the reversing mechanism.

Referring to the drawings, 1 indicates the main shaft of the engine. As illustrated it is the main power shaft of a traction engine, of which latter 2 is the boiler, 3 the steering wheels, 4 the traction or ground driving wheels, 5 the compensating or differential gear, 6 the countershaft with which said gear is concentric and by independent pinions 7 of which the gears 7" and the traction wheels are actuated, 8 the transmitting gearing connecting with the gear 5, 9 the fly and band wheel fiXed on the shaft 1, 10 the friction clutch by which the shaft 1 or wheel 9 is connected with the gearing, 11 the crank wheel, and 12 the engine cylinder.

13 is the eccentric-carrying part, wheel or disk, typical of any suitable eccentric-carrying means, mounted on the shaft 1 so as to be capable of being turned relative thereto for the purposes hereinafter set forth, and confined between collars 14 and 15 which are fixed on the shaft, as by set screws 16.

17 is the engine eccentric adapted to actuate the valve of the cylinder 12 by the usual strap and valve rod 18. It incloses the shaft 1 by a slot 19 which allows the eccentric to be moved or shifted relative to the shaft, and is preferably guided by a lug 20 carried by an arm 21 of the eccentric and fitting in a slot or recess 22 or equivalent guide, in or on the wheel 13.

The automatic centrifugal governing mechanism for controlling the eccentric and moving the same relative to the shaft 1, to vary the cut off of steam from the cylinder 12, comprises levers 23 fulcrunied at 24 on the wheel 13 and provided with centrifugal weights 25. These weights are adjustable, to vary their leverage and power, by means of screw threaded stems 26 fitting in correspondingly threaded sockets 27 on the levers and provided with clamping nuts 28. The levers, as shown, are of the second order, con nected, between the fulcrums 24 and weights 25, by links 29 with the eccentric. The links are connected with the levers by pins 30, which pass through slots 31 in the wheel 13 (the weights being preferably on the opposite side of the wheel from the eccentric), and with the eccentric by pins 32. Too high speed of the engine, and the centrifugal force and movement of the weights, will consequently cause the links 29 to draw the eccentric to a position more concentric with the shaft and will accelerate the cut off of the valve and diminish the steam power and speed.

The tendency of the weights is opposed by a spring or springs suitably acting on said weights or on the eccentric. I prefer the construction shown in which a single coiled spring 33 is mounted in the slot 22 and interposed between the lug 20 and a fixed or adjustable seat or bearing in or on the wheel 13. Such a bearing is furnished by a nipple or bushing 34 fitting in the inner end of the spring,- held from rotation in the slot 22, and mounted by a screw thread on a bolt 35. The latter has a rotary bearing at its inner end at 36 in the hub of the wheel 13, passes through the spring, and has its head 37 seated in a recess 38 in the periphery of the wheel. By this head the bolt may be turned, the tension of the spring on the weights varied and the governor set for the desired speed.

The manually operated reversing mechanism which I have combined with the above described automatic governing mechanism, to be actuated by the engineer at will for the reversing of the position of the eccentric from one to the other side of the shaft 1 andthe consequent reversal of the direction of rotation of said shaft, will now be described. A leading feature of this part of my invention consists in means whereby the governing mechanism as a whole, including the eccentric carrying part or wheel 13 and the eccentric 17, are turned bodily on and relative to the shaft to sufficiently shift the eccentric for the purpose above mentioned.

39 is a supplemental reversing lever fulcrumed at 40 on a suitable fixed support 41 which may be carried by the boiler. This lever has one of its arms provided with one or more trunnion pins 42 fitting in seats 42 in or on a two part longitudinally movable collar 43, of usual construction, embracing the shaft 1 and fitting over the flange 44 of a sleeve 45. The latter is caused to turn with the shaft by means of a spline 46, and is longitudinally movable thereon by the lever 39 and collar 43. Said spline serves also to secure the collar 14 from rotation and make it a strongly fixed fulcrum from which toactuate the wheel 13 relative to the shaft.

47 is a bevel or miter gear or segment pivoted on a stud 48 on the collar 14 and engaging a corresponding gear or segment 49 loosely mounted on theshaft 1, or on the reduced end 50 of the hub of the wheel 13, between the collar 14 and the said hub. The segment 49 is adapted to engage and turn the wheel 13 on the shaft, as by pins or lugs 51 fitting in corresponding recesses 59 in the 52 is a link connecting an eccentric pin or bolt 53 on the segment 47 with a pivot stud 54 on the sleeve 45.

By the mechanism above described it will be understood that an oscillation or movement of the lever 39 will be transmitted to the wheel 13 and turn it, with the eccentric, on the shaft 1. It is necessary that the move ment of the wheel 13 shall be properly stopped in order that, for either direction of movement of the engine ,the valve may have the proper lead. I prefer to provide a stopping or arresting means closely connected with the eccentric carrying means or part 13 and to this end the segment49 is provided with a shoulder or lug 55 (Figs. 5 and 7) which extends between adjustable stop screws 56,

mounted in or on the collar 14, as in lugs 57 of the latter. By adjusting said screws 56 the proper positions of the valve may be secured for the desired speeds during both directions of rotation of the engine. When so adjusted the stops 56 may be securely clamped by nuts 58 which engage the screw threads of said stops and abut against the faces of the lugs 57.

The supplemental reversing lever 39 is actuated by the rod 60 extending to the hand lever 61 mounted on the engine within convenient reach of the engineer. with this hand lever is a quadrant 62 (Fig. 1) by which the lever is held and locked in the desired position. With this quadrant may be combined adjustable notched pieces 63, which may be set along the quadrant so as to stop and hold the lever 61 to give the proper valve 0 ening for the desired speed both in going a ead and in backing. These notched pieces may be said to correspond with the adjustments of the tops 56. The notched pieces may however be dispensed with and the quadrant 62 finely notched, the stops 56 being relied upon to properly arrest the shifting of the eccentric and the lever 61 to hold the eccentric in such position by engaging that notch of the quadrant at which it has arrived when arrested by a stop 56.

64 and 65 indicate the hand lever and rod for actuating the clutch lever 66 friction clutch 10.

The normal position of the main wrist pin of the engine is indicated by the dotted circle a, Figs. 3 and 4.

What I claim is:

1. In a speed governor and reversing mechanism, the combination of a shaft, an eccentric carrier mounted and adapted to be turned thereon, an eccentric on said carrier and movable thereon, centrifugal devices connected with the eccentric to move the same for governing, and toothed gearing arranged to turn said carrier angularly relative 0 tlkile shaft for reversing, substantially as set ort 2. In a speed governor and reversing mechanism, the combination of a shaft, an

Combined eccentric carrier mounted and adapted to be gear or segment and mounted on said fulturned thereon, an eccentric on said carrier and movable thereon, centrifu a1 devices arranged to move the eccentric or governing,

a shifting device mounted on the shaft and rigidly secured thereto on a pivot transverse to the shaft, turnable in lanes parallel with the shaft and connecte with said carrier, and means for actuating said shifting device to turn the carrier for reversing, substantially as set forth.

3. In a speed governing and reversing mechanism, the combination with the engine shaft, the eccentric, the centrifugal devices adapted to shift the eccentric, and a carrier for the eccentric loosely mounted on the shaft, of the gear 47 ivotally mounted in fixed osition on the shaft, the shifting devices for said gear, the gear 49 loosely mounted on said shaft and adapted to mesh with gear 47 and to engage said carrier, whereby when the shaft is rotated the carrier is caused to rotate therewith and when the reversing mechanism is rotated the carrier is turned relative to said shaft.

4. In a valve governing and reversing mechanism for engines, the combination of an eccentric carrying part or wheel, an eccentrio, and centrifugal governing devices con- 1 nected therewith on said Wheel, a rotary gear or segment connected with said wheel, a fulcrum adapted to be fixed on the engine shaft, a second gear or segment engaging the first crum and manually operated mechanism connected with the latter gear, whereby said wheel with its supported devices may be turned on an, engine shaft relative to said fulcrum.

5. In a valve governing and reversing mechanism for engines, the combination of a shaft, an eccentric carrying means or wheel on said shaft, an eccentric and centrifugal the latter, and adjustable stops for arresting such turning of said wheel to determine the position of the eccentric and the engine valve for the desired speed of the engine in either direction.

6. The combination of the eccentric carryin part or wheel, an eccentric and centrifugaI governing devices connected therewith mounted on said wheel, a fixed collar having adjustable stops 56, a lug connected with said wheel and situated between said stops, and means for turning said wheel in either direc tion relative to said stops.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM N. SPRINGER.

Witnesses L. A. SMITH, F. P. KINsEY.

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