US561171A - Island - Google Patents

Description

BShegets-Sheet 1. E. 'O'MYRIOK & G. G. DOEG.

, (No Mo del.)

STOP MOTION FOR ENGINES.

' Patented June 2, 1896.

(No Model.) 6 SheetsSheet 2] E. 0.. MYRIOK & G. O. DOEG. STOP MOTION FOR ENGINES.-

N0. 561,171. Patente me 2, 1896.

ANDREW EGRAHAM. PHOYO-UTNO. WA$HINGTDND C.

(No Model.) I 6 SheetsSheet 3. B. O. M'YRIGK & G. O. DOEG.

STOP- MOTION FOR ENGINES.

INVIEN'TEIHS.

WITNESSES.

AN DREW BYGRMAM PNMO-III'HQWASNIN GTDN. D C

(No Model.

6 Sheets-Sheet 4.

E. C. MYRI'OK & G. O. DOEG. STOP MOTION FOR ENGINES.

N0.561,171. PatentedJuneZ,18 96.

AN DRILW EGRANAM. PNOTO-UTHQWASi'IINGTDN. D Iv 6 SheetsSheet 5-. G

(No Model.) 3

' E. o. MYRIGK & G. 11. DOB

- STOP MOTION FOR ENGINES Patented June 2, 1896.

1 m WITNESSES.

UNTTED STATES PATENT ,OFFIcn.

EUGENE C. MYRICK AND GEORGE O. DOEG, OF PROVIDENCE, Rl-IODE ISLAND.

STOP-MOTION FOR ENGiNES.

SPECIFICATION forming part of Letters Patent No. 561,171, dated June 2, 1896.

Application filed December 30, 1895. Serial No. 573,727. (No model.)

of the same, to be a full, clear, and exact description thereof.

The stop-motion which forms the subject of the present invention is more particularly adapted for use upon steam-engines which are provided with a detachable valve-gear and mechanism connected with and controlled by the governor for regulating the detachment of the valves.

. motion in which the mechanism connecting. the governor with the mechanism for regu- The invention relates to means for stopping the engine automatically whenever the speed of the engine rises above or falls below predetermined limits, or when a part of the engine becomes displaced, and which will also enable the engine to be stopped whenever desired from a point distant from the engineroom.

In Letters Patent No. $1,287, heretofor granted to us, is shown and described a stoplating the detachment of the valves comprises two parts detachably connected together, one of said parts being provided with an independently-movable engaging device for engaging the 1 other part and carrying an elec tromagnet for operating said engaging device when an electric circuit is closed either automatically by the movement of the governor or by hand at a point distant from the engine. In an application of even date herewith we have also shown and described a somewhat similar stop-motion, in which the independent engaging device is operated automaticall y by mechanical devices instead of by an electromagnet and in which a magnet serves to operate said engaging device on the closing of an electric circuit by hand. With the constructions of stop-motions described in said patent and said application, in which the electric devices are included in an open circuit, which circuit is closed to effect the .anism to be detached, in a closed circuit,

whereby if the circuit is broken or becomes inoperative for any reason, the electric devices act to cause the stopping of the engine.

It is very desirable to cut oif the supply of steam from the cylinder in case of any movement of the cylinder-head, and a further feature of the present invention consists in includin g the cylinder and cylinder-head in the closed circuit above referred to, whereby the circuit will be broken and the electric devices act to cause the steam to be cut off fromthe cylinder should the cylinder-head move from its seat.

The invention further consists in certain features and combinations hereinafter described, and particularly pointed out in the claims. I

Referring to the drawings, Figure 1 is an elevation of so much of an engine as is necessary to the understanding of the present invention. Figs. 2 and 3 are front and side elevations of a stop motion embodying the present invention. Figs. 4, 5, and 6 are enlarged elevations, partly in section, showing the parts of the stop-motion in different positions. Fig. 7 is an elevation, and Fig. 8 a plan View, of a stop-motion. Fig. 9 is a longitudinal vertical section on theline 0c 00, Fig.

4, looking in the direction of the arrows in said figure. Figs. 10 and 11 are details showing the electric devices in two different positions. Fig. 12 is a horizontal section on line Figs. 14 to 17 are details derstood, however, that the features of invention hereinafter described are not limited to any particular form or type of engine, but may be applied to any engine provided with detachable valve-gear, whether horizontal or vertical, stationary or marine, and can read ilybc applied to such class of engines now in use without any change in or addition to the mechanism for regulating the detachment of the valves.

1 represents an oscillating or swinging frame pivoted at 2 and to be operated in the usual manner by an eccentric upon the main shaft of the engine connected to said swinging frame at 3 for giving the proper movements to the steam and exhaust valves of the cylinder. The arms 4 of the swinging frame 1 are connected bymeans of the links 5 to the crank-arms (i, which operate the exhaustvalves. The arms 7 7 of the swinging frame are connected by means of links 8 8 to the crank-arms 9 9, which operate the steamvalves. As will be understood, the crankarms are not permanently connected with the steam-valves, but are dctaehably connected therewith through a suitable latch connection, and so that the valves may be unlatched and disconnected from the arms 9 before the completion of their throw and quickly closed by weights \vorkin g in the dash-pots 10. The time of unlatching and thus disconnecting the steam-valves from the arms which operate them is automatically controlled by the position of the governor acting through proper connecting mechanism to vary the position of the latch connection, or in, some other suitable way.

IIeretofore the mechanism commonly used for connecting the governor with the mechanism for regulating the detachment of the valves in an engine of the type shown in the drawings has consisted of a T-lever suitably pivoted upon the framework, the long arm of which was connected with and operated by the governor-sleeve a ,and from the short arms of which extended connecting-rods c 0, connecting said short arms of said T-lever with the pivoted levers 11 11, the opposite ends of which were connected to the parts 13 13, which in this case serve for regulating the detachment of the valves, the combination being such that as the governor-sleeve rose and fell under the action of the governorballs the T-lever would be oscillated, and thereby, through the connecting-rods c, the position of the parts 13 automatically controlled and determined.

In the application of the present invention to the engine of the type shown there is no change in or addition to the mechanism for regulating the detachment of the valves, the latches 12, the parts 13, and the connecting rods 0 being all constructed as heretofore. Instead, however, of connecting the rods 0 to the governor-sleeve a through a T-lever constructed of a single part or piece, a T-lever, as in the patent above referred to, is constructed in two parts adapted to be detachably connected together.

A represents the governor, to the sleeve (1/ of which is connected the arm I), extending from a hub [1 loosely mounted on the shaft 11. The hub b is grooved at I)", and said groove is provided with adepression forminga shoul. dcr b. The shaft 1) is mounted in suitable bearings b, one only of which is shown, and has secured thereto the part Z), to which are pivoted the rods 0 cfor controlling the detachment of the valves. The shaft b may be extended and the valve mechanism of a number of cylinders connected therewith, if desired. The part (1 is provided witha flange D which partially surrounds the hub I)", and also with a flange or housing 11*, which supports and protects certain parts to be described. livoted to the part I) is alever I), on one arm of which is adj ustably secured a weight M. The other arm of lever b-"is provided with a shoulder b, forming an engaging device or catch which engages the shoulder I) on hub Z1, and said arm is also provided with a shoulder or notch 11", adapted to be engaged by the dog or latch U carried on the end of a lever b, pivoted in an offset in the housing U. Pivoted to the other end of lever I)" is an arm (1, the free end of which butts against the free end of a similar arm cl, pivoted at d to the top of housing I), said arm forming a toggle for holding the dog I) in engagement with the shoulder 11 An adjustable bolt (2 mounted in abraeket d", secured to housing I), limits the upward movement of the arms (1 (1. The bolt (1 is provided with an adjustable nut cl on its lower end, against which the arms strike, and a lock-nut (1 serves to hold said bolt in its adjusted position.

Secured to the under side of the top of the housing U is abearing e, in which a rodor tube a is mounted to slide, said tube being provided at its ends with the adjustable screwplugs (2 a The housing b is recessed at c to receive the plug 6 at the upper end of the tube 6', and the free ends of the arms cl cl normally rest on said plug. An arm 0" (see Fig. 7 extends from hub Mahd carries a setscrew 0 which engages a lug l)" on the plate or cover I), secured to the housing If. The setscrew b serves to hold the shoulder 1;" against the catch 1) when the parts are in their normal position, and a check-nut b" is provided to hold said set-screw in position when it has been properly adjusted.

With the parts above described in their normal position-21 6-,, that shown in Fig. ihub 11 and the part b are firmly connected together and the detachment of the valve is controlled by the governor in the usual manner. \Vhen the tube 0 is raised, the toggle formed by the arm (1 d is broken and the lever I)" rocks on its pivot under the influence of the weight Z1 the lover I) being forced back against the tension, of spring U and the catch 11 is disengaged from the shoulder l1", thus disconnecting the parts b b. As the weight continues to fall after the parts are disconnected the lever b engages an adjustable setscrew or shoulder f, carried by the part b, and moves said part and the roofs c c independently of the governor, so that the valves are not operated, and thus the engine is stopped.

The tube a is raised automatically to allow the unlocking of the parts D Z) and cause the stopping of the engine when the speed of the engine becomes abnormal by the following mechanism: A bell-crank lever 9 passes through a slot formed in the lever b and is pivoted to the part b on the stud g, on which said lever b is pivoted. The arm 9 of the lever g engages the screw-plug e in the lower end of the tube e and the other arm of said lever carries a cam g which is forced inward by its engagement with one of the abutments h whenever the speed of the engine becomes abnormal, thus rocking the lever g to raise the tube 6 and release the catch 1), .as above described. A set-screw f passes through a lug on the part Z) and serves to adjust the lever g, so that the end of arm g shall properly engage theend of tube 6. The abutments h are in the form of disks carried on the ends of spring-pressed rods h, mounted in the bear ings 7L2, and provided at their outer ends with milled disks h. The bearings 72, are adjustably secured to the bar 7) by means of setscrews h said bar 13 being provided with a depending rod 1', ad justably secured in a support 71, which support is in turn adjustably secured to an arm i secured to the governorstand. Then the engine is running at normal speed, the cam g stands between the abutments h, as in Fig. at, but if the speed falls below or rises above certain limits the said cam engages one of the abutments h and the engine is stopped, as above described.

Then it is desired to stop the engine without unlocking the parts 19 b, as will be the case whenever the engine is stopped by closing the throttle-valve, the engineer draws back the left-hand disk h out of the path of the cam g and said cam passes back of said disk as the engine slows down and the governor falls. (See Fig. 5.)

WVhen the engine is started up, the disk It returns to its normal position under the influence of its spring as soon as the cam g moves from behind said disk.

If desired, the parts may be so adjusted that when the speed of the engine has increased to such an extent that the governor has risen high enough to bring the cam 9 onto the righthand disk the rods 0 0 will have already been moved into position to prevent the opening of the valves, and any further movement of the part b by the weight b will be unnecessary. In this case, however, the weight I)? will move far enough to unlock the parts 19 b, so that when the governor-balls fall the part b and the rods 0 0 will be unaffected by the movement of the governor and the engine will be stopped and remain stopped until started by the engineer.

In the case of a condensing-engine it is advantageous, in order to insure a prompt stopping of the engine, to not only prevent the admission of steam to the cylinder, but to also destroy the vacuum in the condenser. To accomplish this result, a rod 25 is connected to the lug 2i, projecting from the part b by means of the pin 25 and slot 25 and said rod operates a valve t of any suitable construction to admit air to the condenser, and thus destroy the vacuum therein whenever the part b is moved into the position shown in Fig. 6. This valve may also be constructed to form a stop for limiting the movement of the part b under the influence of weight b or any other suit-able means may be employed for this purpose.

For unlocking the parts b b from a distant point or automatically when there is a displacement of a part of the engine the following means are employed.

Secured to the under side of housing 19 and surrounding the bearing e is an armature 7c. Directly below the armature is an electromagnet is, carried by a plate 7L pivoted at 7.2 to a lug k secured to the part 1). One end of a lever Z, pivoted .to the armaturek at Z, passes througha slot in bearing 6 and engages the upper end of. a slot 6 in tube 6, and the other end of said lever is connected to the plate k by a link Z The ends of the electromagnet-wire pass through the part b and are connected to the binding-posts p. The wires 0 0 of a closed electric circuit are connected to the posts 19 p, and said electric circuit is provided at suitable points with push-buttons 0, whereby the circuit may be broken and the magnet is deenergized. The wires 0 0 are also connected to the cylinder and cylinder-head, as shown in Fig. 1, so that should the cylinder-head move from its seat the circuit will be broken and the magnet deenergized.

So long as the circuit remains closed the magnet is is held against the armature h and the parts remain in the position shown in Figs. 4, 5, and 6, but when the circuit is broken by pushing one of the buttons 0' or by the movement of the cylinder-head or for any other reason, the magnet is deenergized and drops, as shown in Fig. 10, therebylifting the tube 6 through the link Z and lever Z, thus breaking the toggle d d and releasing the catch Z9 and allowing the weight b to unlock the parts I) Z) and move the rods 0 0, so that the engine is stopped.

With the construction above described, in which the electrical device for eausin g the unlocking of the parts of the connecting mechanism is in a closed circuit, the breaking of which causes the parts to be disconnected, the electric device acts as an indicator to indicate that the electric circuit is in proper working order,'for should the circuit become defective for any reasonthe magnet will immediately drop and remain in its lower position, whereas if the circuit is simply broken for an instant by operating one of the pushbuttons the magnet will drop to break the toggle (Z (l and then immediately return to its normal position.

In order that the engine may be run when the circuit is being repaired or when it is desired to discontinue the use of the electric devices for any reason, a device is provided to hold the magnet-support substantially in its raised position until such repairs have been completed or it is again desired to use the electric device. In the construction shown this device consists of the arm m, sccured to the stud m, pivoted in the housing I), and provided on its outer end with a weighted handle m \Vhen the circuit becomes defective and it is desired to run the engine while repairing said circuit, or when it is desired to run the engine without the use of the electric devices, the handle m is moved into the position shown in Fig. 11, thus causing arm on to engage and lift the plate 70 the friction on the end of arm 77]., due to the weight of the magnet 7t, holding said arm in position. This lifting of the magnet does not carry it into contact with the armature 7.3, but lifts it far enough to allow the arms at d to occupy their normal position. When the circuit is repaired or when the current is turned on, if the use of the electric devices has been discontinued for any reason, the magnet becomes energized and is lifted into contact with armature k, and the arm m is thus released and returns to its normal position under the influence of the weight m \Vhat we claim as our invention, and desire to secure by Letters Patent, is-

1. The combination with the governor and mechanism for regulating the detachment of valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device and mechanical devices for automatically rendering said means operative whenever the speed of the engine becomes abnormal, substantially as described.

2. The combination with the governor and -mcchanism for regulating the detachment of the valves, of mechanism for connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, means for operating said engaging device, and devices for releasing said means whereby the engaging device is operated to disconnect the parts of the connecting mechanism, substantially as described.

3. The combination with the governor and mechanism for regulating the detachment of the valves of mechanism for connecting said governor and said regulating mechanism said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device and for moving one of said parts independently of the governor, and devices for rendering said means operative, the construction being such that the operating means first operates the engaging device to disconnect the parts of the connecting mechanism and then moves one of the parts of the connecting mechanism independently of the governor, substantially as described.

4. The combination with the governor and mechanism for regulating the detachment of the valves,of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device, a dog for holding said operating means, and means for actuating said dog to release said operating means, substantially as described.

5. The combination with the governor and mechanism for regulating the detachment of the valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connectin g said parts, means for operating said engaging device, a dog for holding said operating means, a toggle for holding said dog, and means for breaking said toggle to release said dog, substantially as described.

6. The combination with a conncctin g mechanism comprising two parts for connecting the governor and the mechanism for regulating the detachment of the valves, of a lever pivoted to one of the parts of said connecting mechanism, a stop on said part arranged to be engaged by said lever, an engaging device for engaging the other part of said mechanism carried by said lever, means for operat ing said lever, a dog for holding said lever and means for releasing said dog, whereby the lever first moves the engaging device to disconnect the parts of the connecting mechanism and then engages said step and moves one of the parts of said connecting mechanism, substantially as described.

'7. The combination. with the governor and mechanism for regulating the detachment of the valves,of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device to disconnect said parts, means comprising a cam carried by said connecting mechanism for releasing said operating means and an abutment for actuating said cam whereby the two parts of the connecting mechanism will be automatically disconnected whenever the speed of the engine becomes abnormal, substantially as described.

8. The combination with the governor and mechanism for regulating the detachment of the valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts,

means for operating said engaging device to disconnect said part-s, means comprising a cam carried by said connecting mechanism for releasing said operating means and an abutment for actuating said cam and means for adjusting the position of said abutment, substantially as described.

9. The combination with the governor and mechanism for regulating the detachment of the valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device to disconnect said parts, means comprising a cam carried by said connecting mechanism for releasing said operating means and tWo abutments for actuating said cam, one of said abutments being located on each side of said cam, substantially as described.

10. The combination with the governor and the mechanism for regulating the detachment of the valves, of mechanism for connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, mechanical means for automatically operating said engaging device to disconnect the two parts of said connecting mechanism, when the speed of the engine becomes abnormal, and means for effecting the operation of said engaging device by the breaking of an electric circuit, substantially as described.

11. The combination with the governor and the mechanism for regulatin g the detachment of the valves, of mechanism for connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device to disconnect said parts, means for automatically releasing said operating means whenever the speed of the engine becomes abnormal, and means for releasing said operating means from a point distant therefrom, substantially as described.

12. The combination with the governor and the mechanism for regulating the detachment of the valves, of mechanism for connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device to disconnect said parts, means for automatically releasing said operating means Whenever the speed of the engine becomes abnormal, and means including an electric circuit forreleasing said operating means from a point distant therefrom, substantially as described.

13. The combination with the governor and the mechanism for regulating the detachment of the valves, of mechanism for connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, means for operating said engaging device to disconnect said parts, means for automatically releasing said operating means Whenever the speed of the engine becomes abnormal, and means including a closed electric circuit for releasing said operating means from a point distant therefrom, substantially as described.

14:. The combination with the mechanism for regulating the detachment of the valves, of a closed electric circuit, and mechanism connected with said regulating mechanism and made operative by the breaking of said circuit to move said regulating mechanism into such a position that said valves will not be operated to admit steam to the cylinder, substantially as described.

15. The combination with the mechanism for regulating the detachment of the valves, of a closed electric circuit, mechanism connected with said regulating mechanism and made operative by the breaking of said circuit to move said regulating mechanism into such a position that said valves Will not be operated to admit steam to the cylinder, and means for breaking said electric circuit, substantially as described.

16. The combination with the mechanism for regulating the detachment of the valves, of a closed electric circuit mechanism connected with said regulating mechanism and made operative by the breaking of said circuit to move said regulating mechanism into such a position that said valves will not be operated to admit steam to the cylinder, and means operated by the movement of the cylinder-head to break said-electric circuit, substantially as described.

17. The combination with the governor and the mechanism for regulating the detachment of the valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts, an engaging device for connecting said parts, an armature, an electromagnet in a closed circuit and devices intermediate said magnet and said engaging device,whereby the breaking of said electric circuit e'i fects the disengagement of said engaging device, substantially as described.

18. The combination with the governor and the mechanism for regulating the detachment of the valves, of mechanism connecting said governor and said regulating mechanism, said connecting mechanism comprising two parts detachably connected together, a closed electric circuit the breaking of which will serve to disconnect the two parts of said connecting mechanism, and suitable electric connections whereby said electric circuit may be broken either by hand or by the movement of some part of the engine, substantially as described.

19. In a connection between the governor and the mechanism for regulating the detachment of the valves, the combination of an engaging device, means for operating said engaging device, a dog for holding said engaging device, an electromagnet included in a closed circuit, and devices intermediate said magnet and said dog whereby said engaging device is released when the electric circuit is broken, substantially as described.

20. In a stop-motion for steam-engines the combination with a shoulder of a catch, means for operating the same, a dog for holding the catch, a toggle for holding the dog, and a sliding rod for engaging the toggle and breaking the same, substantially as described.

21. The combination of mechanism for preventing the operation of the valves comprising devices made operative by the breaking of an electric circuit and a catch under the control of the engineer for holding said de- EUGENE C. MYRIGK. GEORGE (3. DOEG, \Vitnesses:

W. II. THURSTON, IRA L. 'Elsn.

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