US676196A - Towing-machine. - Google Patents

Description

40.676,196. y -Patented lune'u, lsol. F. METCALF. TWING MACHINE.

(Application led Mar. 13, 1901.) (No Model.) 2 Sheets-$heet l.

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A Tros/vf YJ @www 93 No. 676,196. f rammed lune u, |901.

r. rar-:Temi4 TOWING MACHINE.

` (Appliqation led Mar. 13, 1901.) Y (No Model.) 2 S`heets$heet 2.

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UNITED STATES PATENT OFFICE.

FREDERICK METCALF, OF CLEVELAND, OHIO, ASSIGNOR TO THE CHASE MACHINE COMPANY, OF SAME PLACE.

TowiNG-MACHINE.

SPECIFICATION forming part of Letters Patent N0. 676,196, dated June 1 1, 1901.

l l Application filed March 13, 1901. Serial No. 50,897. (No model.)

improvements in towing-machines.

One object of my invention is to preventthe tow-line-engaging drum from paying out or-winding up too much line` and yet enable the drum to pay out a comparatively large length of line when the strain upon the towline exceeds the normal strain.

Another objectof my invention is to provide improved mechanism for automatically controlling the operation of the valve which controls the supply of steam or fluid under pressure to the Huid-pressure engine of the machine, so that when the strain upon the towline becomes abnormal the valvewillautomatically be actuated to increase or decrease the supply of steam or fiuid to the engine, ac-

cording as the strain upon the tow-line has become greater or less than the normal strain.

Another object of the invention is to provide such an improved construction and arrangement of the parts of the mechanism for controlling the operation of the aforesaid valve that when the abnormal strain upon the tow-line is great enough to require the movement of the valve into its full-'open position the valve shall be permitted without injury to any part of the mechanism and without interfering with the function which is to be performed by the mechanism to remain full open until a rotation ofthe tow-line-engaging drum in the direction opposite to the direction in which it is rotated by the abnormal strain upon the line is effected.

With these objects in view and to the end of realizing other advantages hereinafter appearing the invention consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims.

f In the accompanying drawings, FigureIis a invention. A portion `of the winding-drum is broken away in this figuretomore clearly show certain features of construction. II is a top plan, partly in section, showing the `mechanism for automatically controlling the operation of the valve which controls the supply of steam orfiuid under pressure to the engine of the machine, and portions are broken away in this figure to reduce the size of the drawing. Fig. III is a side elevation top plan of a towing-machine embodying my Fig.'

showing a portion of the mechanism for conv trolling the operation of the said valve. Fig. IV is a vertical section on line 1V IV, Fig. II, looking inthe direction indicated by the arrow. Fig. V is a view showing a portion of the mechanism for controlling the operation of the valve and other features hereinafter described. Eig. VI is an elevation showing the valve-casing containing the aforesaid valve in cent-ral longitudinal section with the valve full open and with the valve-operating mechanism in a corresponding position. Eig. VII is a vertical section on line VII VII, Fig. II, illustrating mechanism for preventing circumferential displacement of a star-wheel constituting a part of the illustrated valveoperating mechanism. Fig. VIII is a view illustrative of the operation of the mechanism shown in Fig. VII. Portions are broken away'in Figs. VII and VIII to more clearl show certain features of construction.

Referring to Fig. I of the drawings, a designates the stationary framework of the lmachine', and b represents a horizontally-arranged engine-shaft, which is supported from the framework c in any approved manner. The shaft b is operatively provided with `cranks b2, which have their wrists operaing a cylinder to exhaust at one end while takinginfluidv under pressure at its other end are so Well understood that description and illustration thereof in detail are consid-v ered unnecessary in this specification. Suffice it to state that the valves d' within the valve-chests and shown in dotted lines, Fig.

` I, are operatively connected with the rods 6 of eccentric-straps e, which embrace eccentrics b', formed upon the shaft b in theusual "mannen A shaft fis arranged at one side of and parallel with and a suitable distanceY from the engine-shaft b and supported from the framework a. A pinion bs is operatively mounted upon the engine-shaft b and meshes with the counter-gear f3 of a counter-shaft f4, Whichis supported from the framework a and a r.

ranged between'and parallel withthe shafts b andf. The shaft f4 has a counter-pinion f5, meshin g with the spur-gear f2, operatively mounted upon the Ashaft j'. A drum f is operatively mounted in any approved manner uponthe shaft f, and the tow-line Z engages the lsaid drumyand is coiled upon or paid out by the drum, according as the drum is rotated in the one or the other direction. The towlinel leads from the drum f' in the direction Yindicated by the arrow in Fig. I. 3.33`

Steam-supply passage-ways d2 conduct the steam to the valve-chests d of the engine-cylinders, and g designates a valve-casing having its chamber connected at g3 with the said passage-ways, and g represents a common slide-valve vcontained within the said casing and controllin-gthesupply of steam passing through the casing to the outlet g3 of the said casing from the casings inlet g2. (See Figs. Il and VI.) The arrangement of parts is such thatV normally the valve g shall be partiallyr open, as shown in Fig. Il, admitting enough steam. to the valve-chests of the engine to supply the engine-cylinders with a quantity of steamsufficient to counterbalance the normal strain upon vthe tow-line. apparatus whereby-the valve g' is automatically actuated in the direction required to still farther open the said valve or,I moved in the opposite direction, according as the strain upon the tow-linefrom any cause becomes greater or less than the normal strain upon Lhesaid line, is provided, and my invention,

wheel having radial teeth or projections h,

arranged at equal intervals circumeren tiall y of thewheel and adapted to be rotated one tooth. at a time by means operatively connected Withamovable member of the en gine,

the one direction or the other. :member 7c is formed, preferably, upon one Mechanism or is operatively mounted upon a shafth, which is supportedfromthe framework ot and arranged horizontally and parallel with the engine-shaft b, preferably at one side of one of the veccentric strap rods e of the engine. Preferably the shaft h2 extends near the said rod e and the Wheel h is mounted upon the v shaftsend which is adjacent to the said rod,

and a pin or projection e2, with which the said rod e is provided, is arranged to engage and intermittently rotate the wheel h, one

tooth at a time,once during each rotation of the engine-shaft, and obviously the Wheel h, and

consequently the shaft h2, are rotated in the kat right angles to and below the Worm-shaft h2. The slide-valve g has its stem g4 extendfing outside of the valve-casing g, parallel -with the worm-shaft h2, and consequently at rright angles to the shaft 7c. `lishing operative connection between the Means for estabvalve-stemgl and a revolving pin or member c, with which the shaft 7c is provided, isem- ,ployed, and the arrangement of parts is such more nearly close the same, according as the said revoluble pin or member* 7c travels in The revoluble of the parts or members of a clutch with which the shaft It is providedthat is, the shaft 7.o 'extends between the Worm-shaft and the line of the valve-stem gl and has its ouierend provided With a clutch whose members 762 and 7c3 are provided upon their opposing faces with mutually-engageable pins 7a4 and holes h5. The holes h5 are shown formed in the outer clutch member 7c3 and engaged by the pins 7a4, with which the inner clutch member lr,2 is provided. The inner clutch member k2 is slidable endwise of the shaft 7c, but operatively connected with the lshaft by the well-known means of groove and feather j, as shown in Fig. IV, and can therefore be actuated out of operative engagement with the companion and other clutch member k3, being provided with an annular groove '76, engaged by the fork of a forked lever t', applied in any approved manner. The outer clutch member 7c3 is loosely mounted on the extreme outer end of the shaft 7c and prevented fromV displacement endwise of the shaft by means of any suitable number of set-screws m, which eX- tend through the said clutch member into engagement with an annular groove k7, formed in the periphery of the shaft, andthe revoluble pin or member lo of the shaft, already hereinbefore referred to, is formed upon the outer end of the said loosely-mounted clutch member at one side of the axial line of the shaft IOO IIO

and is operatively connected with or disconnected from the shaft, according as the clutch members engage or disengage each other. A normally horizontally arranged bar o, extending from the outer end of the stem g4 of the valve g', is pivoted at one end horizontally and parallel with the shaft Zr to the outer end of the said stem by means of a pin n. The bar o is provided in its under side with a recess o', arranged to be engaged by the revoluble pin or member 7c' of the shaft 7c during the operation of the machine. The arrangement of parts is preferably such that the valve g in the normal position of the parts has been moved about one-fourth of its travel toward its full-open position by the pin or member 7c', as shown in Figs. II and III. With the worm h3 provided with a left-hand thread and with the arrangement of the remaining parts of the valve-operating mechanism as hereinbefore described and illustrated, obviously the revoluble pin or member 7s travels in the direction indicated by the arrow in Figs. III and VI or in'the opposite direction, according as the winding-drum f is being rotated in the direction required to pay out or wind up tow-line. In other words, theshaft k is intermittently rotatedin the direction indicated by the arrow in Figs. III and VI when the toW-line-engaging drum pays out tow-line during an abnormal strain 'upon the said line and is rotated in the opposite direction when the drum is rotated in the direction required to wind up tow-line when the strain upon the tow-line being normal is from any cause reduced or when au abnormal strain greater than the normal strain upon the saidline is from any cause lessened. In the normal position of the parts enough steam is being admitted to the engine to counterbalance the normal strain upon the tow-line and the revoluble pin or member 7c is ready to move the bar 0, and consequently the connected valve g',in the direction required to admit more steam to the engine or in the opposite direction to reduce the supply of steam to the engine, according as the strain upon the tow-line is increased or decreased. It will be observed that the arrangement of parts is such also that an operative engagement between the revoluble pin or member la of the shaft 7c and the bar 0 takes place only during the upper half of `the revolution of the said member 7c', and

that consequently the travel of the valve g is effected during the said half of the revolution of the said member k', and that the valve Vwill be left in the one or the other of its ex- 'treme positions, according as the'aforesaid revoluble pin or member 7c', traveling in the one direction or the other, has commenced to make the lower half of its revolution during its said travel. The capability of the supply of steam to the cylinder is continued until the abnormality in the strain upon the tow-line is removed without any injuryto or interference with the valve-operating mechanism or other parts of the machine. It will be observed also that with a drum f capable of winding up or uncoiling six inches ot towline during one rotation of the engine-shaft and with the star-wheel h having ten teeth, with the worm h3 having a pitch of threefourths of an inch, and with the worm-wheel kx having a pitch-circle eighteen inches in diameter the drum will pay out or wind up one hundred and twenty feet of tow-line during one revolution ot the Vrevoluble pin or member 7s of the shaft 7c or the drum will pay out or wind up sixty feet of tow-line during. the travel of the steam-supply valve g from the one to the other ot' its extreme positions. i

The operative connection of the revoluble pin or member 7c with the shaft k through the instrumentality of a clutch renders possible an accurate setting or adjustment of the said memberk relative to the position of the valve g in placing the machine in condition for operation. A disengagement of the slidable clutch member 7a2 by a proper manipulation of the lever i, engaging the said clutch member from the companion and relatively stationary clutch member 7c3, renders the lastmentioned clutch member and the revoluble pin or member 7c with which it is provided free to be adjusted circumferentially of the shaft k, and a restablishment ot operative engagement between the two clutch members secures the said revoluble member 7c in the desired adjustment.

Means for locking the star-wheel 7i and connected mechanism, so far as actuation or operation of the said wheel and mechanism is concerned, when not being operated by the pin or projection e2 of the respective eccentric-rod e' is provided and comprises, preferably, a bar p, which is suspended from the said rod, as shown in Figs. II, VII, and VIII, between the star-wheel and the said rod. The

` pin or projection e2 is preferably formed upon a collar e3, mounted upon the said eccentricrod and secured in the desired adjustment by means of a set-screw e4. The said pin or projection e2 is circular in end elevation. The bar p is provided at its upper end with an ear p', that loosely embraces and is turnable upon the pin or projection e2. The bar p is pivotally connected at its lower end by means of a pin p2, arranged horizontally and parallel with the axis of the star-wheel to a verticallyarranged and vertically shiftable slide s, which engages a correspondingly -arranged slideway forming hole a', formed in the bed or stationary framework a of the machine, and the said slide s is provided at its upper end with a member s', arranged to enter the space between the two adjacent teeth or projections h of the star-wheel h simultaneously (see Fig. VIII) with the disengagement of IOC IIO

IZO

' the pin .or ,projectionc of the aforesaid eccentric-rodfrom the said wheel, and preferably the slide s `has two members s', forming a fork arranged to straddle the tooth or projection of the star-wheel formed between the wheels spaces entered by the said members s.

Obviously the engagement of the space or spaces formed between the teeth or projecagain operated by the llast-mentioned pin or"v projection, and consequently there isno liability of a circumferential displacement of the revoluble pin or member 7c of the shaft lo between the intermittent movements -of the wheel h during the operation of the ma chine. The sweep of the star-wheel-actuatin member (a2-is shown in dotted lines, Fig. VII.

Another bar r, arranged at the outer side and a short distance from and extending longitudinally of the bar o, isnormally parallel with the bar o and is pivoted at one end horizontally and parallel with the axial line of the shaft-1,70 tothe outer end of the valve-stem g4 preferably by means of the pin n, which attaches the inner bar o to the said stem. The

bar r is attached at its other end to a suit-- ably-applied manually-operated lever r'. A short shaft i, arranged horizontally and parallel with the shaft 7c, and consequently arranged at right angles to the bars o and o', is

,journaled in the outer bar a a `suitable distance from the pivot n and is operatively provided at its inner end, between the two bars 0 and r, with a depending arm or lever i', which has a lug or member t2 projecting 'in under and affording a bearing or support-for the inner bar o, as shown in Figs. II and 1V. `The shaft tat its outer end is operatively provided with a hand-lever i3. The provision of the manually-operated shaft t and its varm t t2 enables the upward tilting of the bar o to .the extent required to lift the recessed p0rtion of the said bar out of the path of the revoluble pin or member 7d, and thereby render inoperativethe mechanism employed-in automatically controlling the operation of said valve g when required for any reasonas, for instance, in establishing the normal length of tow-line between the vessel towing and the boat being towed. Fig. V shows `the -shaft t turned to the extent required to lift the bar o out of the path of the pin or member k.

I wouldhave it understood that. although the details of construction hereinbefore described possess considerable merit my invention is not limited to such details'. For instance, the

recess 0', formed in the under side of the bar o, has the two oppositely-facing walls thereof forming two shoulders, and the revoluble p in ,or member lo during the operation of lthe said bar engages and pushes against the lone or the other of the said shoulders, according as the said revoluble member is `actuated in the Ione ldirection or theothemand -my;inven tion embraces, broadly, any-,movable bar operati vely connected withthe fluid-supply-controlling valve of a ,towing-.machine and Aprovided with two oppositely-facin g shouldersarranged a suitable distance apart, in combination with a s uitably-applied and suitably-operated revoluble or movable memberarranged to engage and push against the one or theother of the said shoulders, according as itis traveling in the one orthe other direction. Obviously also anymachine of the character indicated should be provided with means for enabling a `reversalof'the engine, and obviously an ordinary combined Huid-supply controlling and reversingval'ye `might beemployed in lieu of the plain slide-.valve illustrated; butrevers inggears and reversing-valves are so well understood that 'illustration or description thereof is not considered necessary in this application, and I -Would have it understood that my invention .is not limited -to the Aemployment of any particular type of valve, nor to any special arrangement of the parts of the mechanism for transmitting motion from the engine to .the valve.

What I claim is 1. -In a towing-machine, the combination, with the tow-line-engagin g drum, a fluid-pressure engine, an opera-tiveconnection between the engine-shaft andthe drum, a passage-way for conducting fluid under pressure tothe engine,and a valve arranged to control the supply of iuid to the said passage-way, of a shiftable bar operatively connected with the valve and provided with two shoulders arranged a suitable distance apart, a revoluble pin or member arranged to engage and pushagainst the one or the other of the said shoulders according as it is traveling in the one or the other direction, and mechanism whereby the revoluble memberis actuated lin the one direction or the other according as the engine-shaft is rotated in the one or the other direction.

2. In a towing-machine, the combination, with a fluid-pressure engine, the windingdrum, an operative connection between the drum andthe shaft of the engine, a vpassageway for supplying fluidunder pressure to the engine, a valvefcasing having an inlet for receiving the Iiuid under pressure, andan outlet connected with the said passage-way, and a suitably-applied valve controlling communication between the inlet Vand the outlet of the valve-casing, of a shiftable bar operatively connected with the valve and provided with a recess, and suitably-operated mechanism comprising a movable pin or member for engaging the said recess and actuating the bar, the arrangement of parts being such that the valve is actuated in the one direction or the other according as the aforesaid bar is shifted in the one or the other direction, substantiallyas'and for the purpose set forth.

3. In a `towing-machine, the combination, with a Huid-pressure engine, the winding IOO IIO

drum, an operative connection between the drum andthe engine-shaft, and a passageway for supplying fluid under pressure to the engine, of a valve-casing having an inlet for receiving the iiuid under pressure and having an outlet connected with the aforesaid passage-way, an endwiseshiftable bar, a

valve controlling communication between the inlet and the outlet of the valvecasing and operatively connected with the aforesaid bar, suitably-operated mechanism comprising a revoluble pin or member, and means for transmitting motion from the said revoluble member to the bar, the arrangement of parts being such that the valve is actuated in the one direction or the other according as the aforesaid bar is shifted in the one or the other direction, substantially as and for the purpose set forth.

4. In a towing-machine, the combination, with a huid-pressure engine, the windingdrum, an operative connection between the drum and the engine-shaft, a passage-way for supplying fluid under pressure to the engine,

V said shoulders according as it is traveling in the one direction or the other,which last-mentioned shaft is parallel or approximately parallel with the axis of the pivotal connection between the said bar and the valve-stem, substantially as and for the purpose set forth.

5. In a towing-machine, the combination, with a fluid pressure engine, the Windingdrum, an operative connection between the drum and the engine-shaft, a passage-way for supplying fluid under pressure to the engine, a valve-casing having an inlet for receiving the fluid under pressure and having its outlet connected with the said passage-way, and a suitably-applied slide-valve arranged to opcrate in a horizontal plane and control communication between the inlet and the outlet of the valve-casing and having a stem extending outside of the valve-casing, of a suitablyoperated shaft arranged at right angles to the travel of the valve, a vertically-tiltable end- Wise-shiftable barforming an extension of and suitably pivoted to the valve-stem, and means for transmitting motion from the last-mentioned shaft to the valve-stem and for actuating the valve in the one direction or the other according as the said shaft is rotated in the one or the other direction,- substantially as and for the purpose set forth.

6. The combination, with a valve for controlling the supply offluid under pressure to the engine of a towing-machine, ofa shiftable bar operatively connected with the valve and provided with two shoulders arranged a suit able distance apart, a revoluble member arranged to engage and push against the one or the other of the said shoulders according as it is traveling in the one or the other direction,and means foroperat-ing the said revoluble member, substantially as and for the purpose set forth.

7. The combination, with a valve for controlling the supply of fluid under pressure to the engine of a towing-machine, of a shiftable bar operatively connected with the valve and provided with two shoulders arranged a suitable distance apart,a suitably-operated worm-` shaft, another shaft having a Worm-wheel in mesh with the worm of the worm-shaft, and a revoluble pin or member operatively connected with the last-mentioned shaft and arranged to engage and push against the one or the other of the said shoulders according as it is traveling in the one or the other direction, substantially as and for the purpose set forth.

8. The combination, with a valve for controlling the supply of fluid under pressure to the engine of a towing-machine, of a shiftable bar operatively connected with the valve and provided with two shoulders arranged a suitable distance apart, a suitably-'operated shaft, a revoluble pin or member arranged to engage and push against the one or the other of the said shoulders according as it is traveling in the one or the other direction, and a clutch for controlling operative connection between the said revoluble pin or member and the shaft.

9. The combination, with a yalve for con-` trolling the su pply of fluid under pressure to the engine of a towing-machine, of a shiftable bar operatively connected with the valve and provided with two shoulders arranged a suitable distance apart, a revoluble pin or member arranged to engage and push against the one or the other of the said shoulders according as it is traveling in the one or the other direction, means for operating the said revoluble member, and the arrangement of parts being such that the said revoluble pin or member shall operate the valve-actuating bar only during a portion of its revolution,

and shall be in position to disengage the said 10. The combination, with a valve for con` trolling the supply of iiuid under pressure to the engine of a towing-machine, of a shiftable bar operatively connected with the valve and provided, upon its under side, with two shoulders arranged a suitable distance apart, a revoluble pin or member arranged to engage and push against the one or the other of the said shoulders according as it is trav-` eling in the one or the other direction, means for operating the said revoluble pin or member, and the arrangement of parts being such that the said revoluble p in or member shall operate the valve-actuating bar only during the upper portion of its revolution, and shall be in position to disengage the said bar when the said valve has been shifted into its full-l open position, and means whereby the bar is supported when the bar is disengaged by the aforesaid revoluble member, substantially as and for the purpose set forth.

1l. In atowing-machine, a tow-line-engag-- ing drum, a star-Wheel, a fluid-pressure engine provided with a member arranged to interniittently actuate the star-wheel duringv the operation of the engine and to turn the said wheel in the one direction or the other according as the engine-shaft is rotated in the one or the other direction, an operative connection between the drum and the shaft, a passage-way for conducting fluid under` pressure tothe engine, a valve for control` lingthesupply of fluid to the said passageway, and mechanism for transmitting motion to the said valve from the aforesaid star-` Wheel, substantially as and for the purpose set forth.

12. In a towing-machine,the winding-drum, a worm-shaft having a star-wheel for turning the same, a .fluid-pressure engine, an

1 the worm-shaft, and mechanism for transmitting motion from the worm-wheel-,bearing shaft to the valve, substantially as and for the ,purpose set forth.

13. In a towing-machine, the toW-line-engaging winding-drum, a duid-pressure engine comprising a crank-shaft operatively connected with the drum and having an ordinary eccentric strap and rod establishing operative connection between the valve of a valve-chest of a cylinder of the engine and the engineshaft, which rod is provided with a pin or projecting member, a star-wheel arranged to be intermittently rotated by the said projectingrmember of the eccentric-rod during each rotation of the engine-shaft, a passage-way for conducting liuid under pressure to the engine, a valve arranged to control the supply of iuidto the said passage-way, and mechanism ythrough the medium of which power for operating the valve is transmitted from the star-wheel, substantially as and for the purpose set forth.

14. In a towing-machine, the combination, with a tow-line-engaging winding-drum, a star-Wheel, a fluid-pressure engine having a member arranged to intermittently actuate the star-wheel during the operation of the engine and to turn the said wheel in the one direction or-the other according as the engineshaft is rotated in the one or the other direc-A tion, an operative connection between the engine-shaft and the drum, a passage-Way for conducting fluid under pressure to the engine, a valve arranged to control the supply of fluid to the said passage-way, and mechanism for transmitting motion to the said valve from the aforesaid- .star-wheel, of means for preventing circumferential displacement of the star-wheelduring the intervals of time between the intermittent actuations of the wheel.

15. In a towing-machine, the combination,

with the tow-line-engaging d rum,a star-wheel, a fluid-pressure enginehaving a member arranged to intermittently actuate the starwheel during the operation of the engine, and to turn the said wheel in the one direction or the other according as the engine-shaft vis rotated in the one or the other direction, an operative connection between the engine-shaft and th'e drum, a passage-Way for conducting -fluid under pressure to the engine, a valve .arranged to control the supply of fluid to the said passage-Way, and mechanism for transmitting motion to the Valve from the aforesaid star-wheel, of a movable member arranged to enter the space between adjacent `teeth or radial projections of the star-wheel ,during the intervals of time between the intermittent actuations of the said wheel and thereby lock the said Wheel against rotation during the said intervals of time, and such an operative connection between the said locking member and the engine as will result in `rendering the said locking member operative `as soon as the star-wheel-actuatin g member of the engine has disengaged the said wheel.

16. In a towing-machine, the combination, with the tow-line-engaging drum, a starwheel, means for intermittently-operating the star-wheel, a duid-pressure engine, an operative connection between the engine-sh aft and the drum, a passage-way for conducting fluid under pressure to the engine, a valve arranged to control the supply of fluid -to the said passage-way, and mechanism for transmitting motion to the said valve from the star-wheel, of a slide having a member arranged to enter the space between adjacent teeth or radial projections of the star-wheel during the intervals of time between the intermittent actuations of the said wheel, a slideway for the slide, and means for operating the said slide, the arrangement of parts being such that-the said slide shall be rendered operative as soon as the star-Wheel-actuating member has disengaged the said wheel.

17. In a towing-machine, the combination, with a tow-line-engaging drum, a star-wheel, a fluid-pressure engine having a pin or projecting member arranged to intermittently actuate the star-wheel during the operation of the engine and to engage the said wheel at the top and turn the wheel in the one direction or the other according as the engineshaft is rotated in the one or the other direction, a passage-way for conducting fluid un- IOO IIO

der pressure to the engine, a valve arranged to control the supply of fluid to the said passage-Way, and mechanism for transmitting motion to the valve from the star-wheel, of a slide arranged at an elevation below the starwheel and movable up and down and having two upwardly-projecting members forming a fork arranged to straddle a tooth or radial projection of the star-wheel during the upward movement of the slide, a slideway for the slide, and a bar having an ear loosely mounted upon the aforesaid star-wheel-actu` ating pin or member of the engine, which bar is pivoted at its lower end to the aforesaid slide, all arranged and operating substantially as shown, for the purpose specified. 18. In a towing-machine, the combination, with a tow-line-engaging drum, a Huid-pressure engine, an operative connection between the engine-shaft and the drum, a passage-Way for conducting Huid under pressure to the engine, and a Valve arranged to control the supply of liuid to the said passageway, of a revoluble pin or member, means for intermittently operating the said revoluble member, and mechanism for transmitting motion from the said revoluble member to the Valve. 19.' In a towing-machine, the combination, with the towline-engaging drum, a fluid-pressure engine, an operative connection between the engine-shaft and the drum, a passage- Way for conducting fluid under pressure to the engine, and a valve arranged to control the supply of fluid to the said passage-way, of a bar having two shoulders arranged a suitable distance apart, a pivotal connection between the bar and the valve, a revoluble pin or member arranged to engage the one or the other of the said shoulders according as it is traveling in the one direction or the other, and mechanism whereby the said revoluble member is actuated in the one direction or the other according as the engine-shaft is rotated in the one or the other direction, of means for shifting the aforesaid bar out of the path of the aforesaid revoluble member, substantially as and for the purpose set forth.

20. In a towing-machine, the combination, with the toW-line-engaging drum, ailuid-pressure engine, an operative connection between the engine-shaft and the drum, a passageway for conducting fluid under pressure to the engine, a valve arranged to control the supply of fluid to the said passage-way, an upWardly-tiltable endwise-shiftable bar operatively connected with the valve and having its lower surface provided with two shoulders arranged at a suitable distance apart, a revoluble pin or member arranged to engage or push against the one or the other of the said shoulders according as it is traveling in the one direction or the other, and mechanism whereby the said revoluble member is actuated in the one direction or the other according as the engine-shaft is rotated in the one FREDERICK METCALFQ Witnesses:

C. H. DORER, A. H. PARRATT.

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