US945703A - Reducing-wheel for steam-engine indicators. - Google Patents

Description

P. W. CRAIG. REDUCING WHEEL FOR STEAM ENGINE INDICATORS.

APPLICATION FILED PEB.24, 1908.

Patented Jan. 4, 1910,

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Patented Jan. 4, 1910.

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P. W. CRAIG. REDUCING WHEEL FOB STEAM ENGINE INDICATORS. APPLICATION FILED r3124 1908.

945,703. Patnted m 4, 1910.

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PARLEY WESLEY CRAIG, OF ENSLEY, ALABAMA, ASSIGNOR OF ONE-HALF TO LOUIS ERWIN BAUMGARTEN, 0F ENSLEY, ALABAMA.

REDUCING-WHEEL FOR STEAM-ENGINE INDICATORS.

Specification of Letters Patent.

Patented Jan. 4, 1910.

Application filed February 24, 1908. Serial No. 417,366.

T 0 all whom it may concern:

Be it known that I, PARLEY \VnsLEr CRAIG, a citizen of the United States, residing at Ensley, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Reducing-Vheels for SteanrEngine Indicators, of which the following is a specification.

This invention relates to improvements in reducing wheels for steam engine indicators, and consists in certain peculiarities in the construction and arrangement of parts and in certain novel combinations of elements substantially as hereinafter described and particularly pointed out in the subjoined claims.

The object of the present invention, stated in general terms, is to provide these reducing wheels with new and useful features whereby objections found to exist with those commonly used are obviated.

Among the new and useful features referred to, the following are worthy of special mention Means are provided which, in the event of an accident, such as the rupture of the cord which connects the cord-pulley with the cross head of the engine, for example, acts automatically against the spring which effects the return movement of the parts and brings the parts to a stop before rupture of said spring can take place. The illustrated embodiment of this mechanism is in the nature of a brake which frictionally acts upon the pulley referred to and between which and said pulley there is a relative to and fro movement in the operation of the mechanism, whereby the holding engagement between them is automatically released in one direction of movement of the pulley and is again automatically effected at the end of the return movement of the pulley. The operating parts are so related to each other that the return movement of the pulley is concluded at the place, predetermined in the action of the'spring, at which the spring is subjected to no strain in anywise liable to cause its rupture, and the brake is of such nature that it gradually overcomes the power of the spring and brings the parts gradually to a full stop.

Second. The reducing mechanism includes most effective and easily operated and simple means by which movement of the indiing frame and the second gear eating pulley, which is connected with the indicator cylinder, may be stopped without stopping the engine or disconnecting the cord. Different means may be used for this purpose. I have shown in the accompanying drawings a preferred form of means in which the indicating pulley is loosely mounted and is locked to a constantly rotating gear of the reducing train by means adapted to be manually operated to release it from said gear to stop the transmission of movement from. the gear to the pulley.

Third. A supporting frame of special construction is provided, and the parts are so related thereto and to each other as to provide a well balanced and effectively supported structure, whereby durability is enhanced.

In addition to these important features the details of the structure are such as to provide, among other things, for complete protection of, and convenient access to the spring and gears and for maximum adjustment of the guide provided for the operating cord.

These several features of the invention are well. exemplified in the structure illustrated in the accon'ipanying drawing, which exemplify what I now believe to be the best embodiment of the invention, but it is to be understood that the invention in respect of any of its features is not to be construed as limited to the form or mechanism illustrated, which may be varied within apparently wide limits, without departing from the spirit of the invention or the scope of the subjoined claims.

In said drawings: Figure 1 is a side elevation of an indicator embodying my improvements. Fig. 2 is a plan view of the reducing wheel. Fig. 3 is a longitudinal section through the same, on the line 83 of Fig. 2. Fig. t is a detail plan view of the means for controlling connection of the indicator pulley with the reducing gears, with certain parts removed and other elements broken away. Fig. 5 is a detail view of the elements in the pulley which are removed in Fig. t, showing their position when the pulley is locked for rotation. Fig. 6 is a view of the same in the position they occupy when the pulley is released. Fig. 7 is a section through a portion of the supportbox, intended particularly to show the general relation of the parts constituting the connection between the indicating pulley and the operating shaft. Fig. 8 is a section 011 the line h8 of Fig. 7. Fig. 9 is a detail view of a part of the frame, showing the lateral threaded projection and sleeve nut thereof.

'lhe Janie characters of reference designate the same parts in the several views.

In the drawing there is illustrated in a general way the usual indicator comprising the cylinder A which is provided with means whereby a diagram is produced on a card carried by the drum B. These parts may be of the usual or any suitable construction, the details of which form no part of the present invention, and for this reason and for the further reason that their construction and operations are well known, a detail explanation thereof is entirely unnecessary herein.

The present invention relates to the reducing wheels or mechanism of these indicators. This reducing mechanism comprises a supporting frame, C, a pulley, D, to which is connected the operatingcord (Z which runs to the cross head of the engine, a second or indicating pulley E, provided with the indicating cord 6 which runs to the carddrum l3, and connections between the two pulleys, including a reducing train of gears, whereby they are operated n1 unison. lVhile these parts have been embodied in other reducing wheels of this type, yet they are here shown as of novel construction and arrangement whereby advantageous results are secured. Thus, the frame C of the present construction is of yoke form, and is provided with lateral projections 11. a, one of which as a is threadably or otherwise suitably connected. to the cylinder A and the other, as a, is connected, preferably by means of a lock-nut a, to the valve-casing A through which steam is admitted to the interior of said cylinder. T he outer ends of the arn'is, 1, l of the frame form separated bearin s for the operating shaft :1. The operat 15; or cord pulley D is mounted upon tnis shaft at a place between these hearings. The opposite ends of the arms 1, l are preferably enlarged and chambered, or formed to provide boxes, G and H respectively, one as H, ada 3tl to contain elements 10 and 11 of the reducing; train, and the other G, adapted to contain the spring- F. This box l is provided with a plate 3., which cons itutes a cover therefor and is removably secured thereto by suitable means, such as the screws l. It second gear box, I, is pro vided. for other elements, 18 and 14-. of the reducing train, and this second box is mounted against the box H, and is formed by a ring}; 5 which is reniovably secured, as by screws to a disk 0 forming the outer wall of the box H. A wall of the box H thus forms one wall of the box I and the other wall of the latter is formed by one side of the pulley E1. in this box l there is also mount-ed releasing means for the pulley E. This relative arrangement and connection of the parts affords convenient access to the spring F, and also enhances the durability of the structure by alter-ding;- a most stable support for the shaft I; and the parts carried by said shaft, and by causing the parts to be well balanced. lrloreover, the. spring l and the referred to elements o the reducing train are incascd and prol ted. One end of the spring l? is suitably secured to the shaft while its other end is s xcurcd to a fixed support as a projection '7 from the spring-box or casing 'l for example.

The cord pulley l) is suitably connected to the shaft X. to rotate therewith, and is here shown as fixed thereto by a set screw 8 which constitutes a suitable means for the purpose. It is provided with a sleeve 2 which is secured to it by suitable inc-ans, screws Y being here shown for the purpose. This sleeve is externally threaded and acts as an adjusting means for a cord guide and brake, as will be hereinafter more fully set forth, and also forms extended bearing for the cord-pulley upon the shaft. It is apparent that the sleeve might be dispensed with and the brake adjusted by forming threads directly on the shaft, for example, but for the reasons juststated I greatly prefer to use said sleeve.

Mounted upon the end of the shaft X in the gear box H is the member 10 of the reducing train, another nunnbcr (ll) of which train is mounted upon a shaft 12 which extends into the second gear box or casing l and is n'oviiiled with the third gear (13) which intermcshcs with the fourth gear 14-. These gears are pro portioned pro perly to reduce the speed suitable between the shaft X and pulley l It will now be seen that when the cord (Z, which is attached to the cross head of the engine, is pulled, the shaft X is turned against the tension of the spring l and that this motion, suitably reduced, is communicated to the pulley E when the latter is fixed to rotate with the gear and that the pulley E, by means of the cord 0, rotates the drum B: and it will be understood that steam entering the cylinder It through the connection a will act upon the usual piston in the latter and raise and lower the pencil which is connected with said piston and is in contact with the indicator card upon the drum B.

Suitably connected with the shaft erably through the intern'iediate threaded sleeve 2, r s already indicated, is a sleeve 15, upon which is suitably secured an arm 16 from which a rod 1'7 projects across the periphery of the pulley D. lhis rod is propref CAD

vided with an eye 18 through which the cord (Z extends, and it is reciprocated in the oscillatory movement of the shaft,X. It is adjustably fixed to the free end of the arm 16 by clamp nuts 19, and its outer end is guided in its movements by an eye, here shown as formed in a projection 20 which extends from a spring band 21 mounted around the spring casing 6 and fixed thereon by a screw 22. As herein shown, the end of the arm 16 remote from the rod 17 is formed or provided with a spring band 23 having a clamping screw as by which it is adjustably fixed upon the sleeve 15. Most convenient provision is thus made for adjustment of the cord-guiding rod, through adjustments of its supports (the arm 16 and projection 20) and of the rod relative to its supports. It thus may be arranged in different position with respect to the sleeve, to suit the wishes of different users, and also may be adjusted relatively to the periphery of the pulley D to bring its guide eye 18 into proper position for the cord. It will be understood that this guide eye is, by the means described, caused to reciprocate as the cord (Z is unwound and wound upon the pulley D, thus guiding said cord to and from said pulley.

It commonly happens that the cord which is attached to the cross head of the engine breaks and when this occurs in the type of reducing mechanism to which the present structure belongs, the parts are brought back with force by the spring F sufficient to frequently and, in fact, usually, break the spring or destroy its operative connection with the shaft. To overcome this, means are provided whereby return movement of the shaft X is more or less gradually re strained. The means here shown for this purpose comprises a brake J carried by the arm 16 and arranged to engage the pulley D when the latter has reached its predeter mined limit of movement under the influence of the spring. This brake consists of a rod 26 reciprocatorily mounted in the arm 16 and having a head 27 which is pressed into engagement with the pulley D by a spring 28. The head may be provided with fiber or other suitable soft packing to bear against the pulley, if desired. Then the arm 16 moves away from the pulley it carries the brake with it, thus removing the restraint which said brake imposes to the unwinding movement of said pulley: and said brake moves toward the pulley in the winding movement of the latter and contacts therewith at the conclusion of the return movement which has been predetermined, and by its spring-pressure thereon prevents dangerous overrunning of the latter and brings it to a more or less gradual stop. It will be observed that the brake acts against the side or rim of the cord-pulley and that the sleeve 2 provides an extended bearing. The effectiveness of the brake is thus enhanced and all tendency of the mechanism to throw the cord-pulley out of true when the brake is applied is overcome.

This invention also contemplates certain improvements in the means for stopping the rotation of the pulley 15 without disconnecting the operating cord from the engine or stopping the latter. In the means illustrated for this purpose the pulley i is keyed upon a hub 30 of a carrier 31 which preferably is loosely mounted upon a stationary shaft Z in the box l, and means are provided for locking the carrier to and releasing it from the gear lat, which gear preferably is constantly intermeshed with the gear 13, instead of being shifted into and out of engagement with its driving gear. The shaft Z is preferably provided with a flanged end Z secured to the wall 6 of the box I by screws as indicated in Fig. 3. The carrier 31, here shown, is of cup-form and has hubs 3O projecting in opposite directions therefrom to provide effective bear ings. In its depression there are mounted a dog and an arm 3?, pivoted at the points 3-1t and respectively. The dog and arm are connected with each other by a spring 36, of such form that it presses the arm toward a cone 3? and the dog outward into operative relation with a collar 38, both hereinafter referred to. The spring also serves, when the arm 2%?) is moved by said cone, to return the dog from said operative relation. For the latter purpose the edge 39 of the dog is inclined and the end of the spring slides thereon and is sutlieiently rig d to turn the dog upon its pivot while it is being moved thereon. The dog extends through an aperture 4:0 in the wall. of the carrier and its free end engages a tooth or depression 41 in the collar which eueircles the carrier and attached to or formed integral with the gear 14;, and thereby loo the carrier, and through it the pulley E. to the l t for the transmission of movement between the s: me. To release this connection so as temporarily to discontinue movement of the pulley E, the dog is, as already il'nplied, moved out of engagement with the aperture or tooth 11. This is effected by moving the cone 3? longitudinally and relatively to the arm which rests ()v') thereupon, thus forcing the latter backward and connnunicating like movement to said dog by the spring already described. For the purpose of moving the cone 37 manually I have provided an operating lever or arm 12 which extends outward from the box I through an aperture 13 in the wall of the ring 5 and is fulcrumed upon a rod 4. 1 and has a crank arm 45 which is connected by a link &6 with a projection a? extending from said cone, whereby the cone is turned when lot) direction opposite to that imparted to it by the operating pulley, means for carrying the element upon which the indication is made, connections between the same and the shaft, a brake and means whereby relative to and fro movements between the brake and shaft is effected by the movements of the shaft, said brake having a cushioning element for contact with the pulley.

5. In an operating mechanism for steam engine indicators, the combination of the operating pulley, means for connecting the same with the engine-piston, for turning it in one direction, means for turning it in the other direction, and means operative to elastically check its movement when the first mentioned means becomes non-operative.

(5. In an operating mechanism for steam engine indicators, the combination of the operating pulley, means for connecting the same with the engine piston, for turning it in one direction, means for turning it in the other direction, a yieldable brake for restraining its movement, and means whereby relative to and fro movement occurs between the pulley and brake in the rotative movements of the pulley.

7. In an operating mechanism for steam engine indicators, the combination of the operating pulley, means for connecting the same with the engine piston, for turning it in one direction, means for turning it in the other direction, a brake for restraining its movement and connections between the pulley and brake for automatically moving the brake to and from the pulley.

8. In an operating mechanism for steam engine indicators, the combination of the operating pulley, means for connecting the same with the engine piston, for turning it in one direction, means for turning it in the other direction, a brake for restraining its movement, a shaft to which the pulley is fixed, and connections between the shaft and brake for automatically moving the brake to and from the pulley.

9. In an operating mechanism for steam engine indicators, the combination of the operating pulley, its shaft, means for turning the pulley in one direction, a spring for turning it in the other direction, a brake acting upon the pulley and means whereby the brake has connection with the shaft, said means adapted to reciprocate the brake from the shaft.

10. In an operating mechanism for steam engine indicators, the combination of the operating pulley, an oscillatory shaft carrying the same and turned in one direction thereby, a spring connected to the shaft for turning the same in the direction opposite to that imparted to it by the operating pulley, a brake acting upon the pulley, and

means whereby the brake has connection with the shaft, adapted to reciprocate the brake in the movements of the shaft.

11. In an operating mechanism for steam engine indicators, the combination of the operating mechanism, its shaft, means for turning the pulley in one direction, a spring for turning it in the other direction, a support having a threaded connection with the shaft, and a spring-pressed brake movably mounted in the support and arranged to act on the pulley.

12. In an operating mechanism for steam engine indicators, the operating pulley and its operating cord and spring, a cord guide and brake, a common support for said guide and brake, and means operative to produce relative to and fro movements between said support and pulley in the rotative movements of the latter.

13. In an operating mechanism for steam engine indicators, the operating pulley and its operating cord and spring, a cord guide and brake, a common support for said guide and brake, and means operative to produce movement of the support toward and from the pulley in the rotative movements of the latter.

lt. In an operating mechanism for steam engine indicators, the operating pulley and its operating cord and spring, a rotative shaft upon which the pulley is mounted, a support movable with relation to said pulley and having a threaded connection with the shaft, and a cord guide and a brake, both carried by said support.

15. In an operating mechanism for steam engine indicators, the operating pulley, the cord and spring, a casing for said spring, a cord guide, extending over the pulley, and having a support at one end, said guide and pulley having relative to and fro movement, and means for supporting the other end of the guide, the latter means mounted upon the spring casing.

16. In an indicator for steam engines, the combination of an indicating drum, a pulley having connection therewith, a shaft, means for turning the shaft in opposite directions, a reducing train, comprising a gear mounted upon said shaft, a second shaft, having gears one of which is constantly intermeshed with the first mentioned gear, and a fourth gear constantly intermeshed with the other gear on the second shaft, and a locking connection between the fourth gear and the pulley, movable to release the pulley.

17. In an indicator for steam engines, the combination of an indicating drum, a pulley having connection therewith, a shaft, means for turning the shaft in opposite directions, a reducing train, comprising a gear mounted upon said shaft, a second shaft having gears one of which is constantly intermeshed with the first mentioned gear, and a fourth gear constantly intermeshed with the other gear on the second shaft, and a locking connection carried by the pulley and engaging the fourth gear and movable to release the pulley.

18. In an indicator for steam engines, the

combination of an indicating drum, a loosely mounted pulley having connection therewith, and an operating mechanism for .aid pulley having constantly intermeshed reducing gears, one of which has an aperture, and a movable locking and releasing means, connected with the pulley and adapted to engage the aperture in said gear.

19. in an indicator for steam engines, the combination of an indicating drum, a loosely mounted pulley having connection therewith, and an operating mechanism for said pulley, comprising reducing gears, a carrier which rotates with the pulley and has a dog to engage a reducing gear, and means for moving the dog into and out of engagement with said gear to thereby locl; and release the carrier to and from the same.

20. in a reducing mechanism for steam engine indicators, a loosely mounted pulley having means for connecting it with the indicating drum, and an operating mechanism for the pulley, comprising reducing gears, a carrier which rotates with the pulley, a dog and an arm carried by the carrier, said dog adapted to engage a reducing gear, a spring connecting the arm and dog with each other and transmitting movement from one to the other, and means acting upon the 1 i to adjust the dog.

J. In a reoucii'ig mechanism for steam engine indicators, a loosely mounted pulley having means for connecting it with the indicating drum, and an operating mechanism for the pulley comprising reducing gears, a carrier which rotates with the pulley, a dog and an arm carried by the carrier, said dog adapted to engage a reducing gear, a spring connecting the arm and dog with each other and transmitting movement from one to the other, and a longitudinally movable cone which acts upon the arm to adjust the dog.

in a reducing mechanism for st 1am engine indicators, an indicator pulley, an operating shaft, connections between the shaft and pulley for transmitting movement to the latter, comprising reducing gears, and means for locking the pulley and a gear together for unitary movement, comprising a dog carried by one of the parts and adapted to engage the other and an actuating means for said dog, having an inclined surface, and means for moving the same relatively to the dog.

23. In a steam engine indicator, gearing, a pulley, and means for locking and releasing the pulley and gearing with relation to each oher, comprising a dog which moves with one of such parts and is adapted to engage the other of the same to lock them together "for unitary movement, and means for moving the dog into and out of engagw ment with the latter part, including an elcment having a sliding engagement with the dog and adapted to move the same in opposite directions.

Q-"l. In a steam engine indicator, gearing, a pulley and means for locking the pulley and gearing for unitary movement, comprising a dog which moves with one of such parts and is adapted to engage the other of the same, and means for moving the dog into and out of engagement with the latter part, having a rotatable element having an inclined surface, means for rotating said element and means whereby its rotative n'iovement c2 uses it to move longitudinally.

In a steam engine indicator, caring. a pulley, and means for locking the pulley and gearing for unitary movement, comprising a dog which moves with one oi said parts and is adapted to engage the other of the same, and means for moving the dog into and out of engagement with the latter part, comprising a slidable and rotatable actuating device having an inclined surface, a. arm engaging said surface, connections between the arm and dog for transmitting movement from one to the othe and means to cause said actuating device to slide upon the rotation thereof.

26. In a steam engine imlicator, gearing, a pulley and means tor locking the pulley and gearing for unitary movenmnt, comprising a dog which moves with one of such parts and is adapted to engage the other ot the same, and means for moving the dog into and out of engagement with the latter part, comprising a :-:lidable actuating device having an inclined surface, an arm. and a spring which prt the arm to said surface and has a siidin engagement with the dog.

2?. in a steam engine indicator, gearing, a pulley, and means "for locking and releasing the pulley and gearing with relation to each other, comprising a dog which moves with one of such parts, and is adapted to engage the other of the same to lock them together for unitary movement, and means for moving the dog into and out of engagement with the latter part, maid means comprising a cone having connection with the dog, an arm engagedv with the cone, a spring transmitting movement between the arm and dog adapted also to press said arm against id cone, and means tor moving the cone longitmlinally.

28. In a steam engine indicator, gearing, a pulley, and means for locking and releasin the pulley and gearing with relation to each other, comprising a dog which moves with one of such parts, and is adapted to engage the other of the same to lock them together for unitary movement, and means l (l (l for moving the dog into and out of engagement with the latter part, said means comprising a cone having connection with the dog, an arm engaged with the cone, a spring transmitting movement between the arm and dog adapted also to press said arm against said cone, a shifting lever and means actu ated by said lever for moving the cone longitudinally.

29..In a steam engine indicator, gearing,

a pulley, and means for locking the pulley and gearing together, comprising a carrier which rotates with one of such parts and is provided with a device for locking it to the other of the same, means for releasing the device from the latter part and means for arresting the movement of the carrier when said device is thus released.

80. In a steam engine indicator, gearing, a pulley and means for locking the pulley and gearing together comprising a device which moves with one of the parts and engages the other, means for releasing said device from the latter part and a device having connection with the latter means and operated thereby to arrest the movement of the part which carries said device when the latter is released from the other part.

31. In a steam engine indicator, gearing, a pulley, and means for locking and releasing the pulley and gearing with relation to each other, comprising a carrier which rotates with one of such parts and is provided with a dog for engaging the other of the same, a detent for the carrier, and means for simultaneously moving the detent out of e11- gagement with the carrier and the dog into engagement with the part which it engages.

In a steam engine indicator, a loosely mounted pulley, reducing gears and means for rotating the pulley from said gears, comprising a carrier which rotates with the pulley, a dog which is carried by the carrier and locks the same to one of the gears, a detent for the carrier and means having connection with the dog and detent and adapted to operate the same to release the carrier from the detent and lock it to the gear.

In a steam engine indicator, a loosely mounted pulley, reducing gears and means for rotating the pulley from said gears, comprising a carrier which rotates with the pulley, a dog which is carried by the carrier and locks the same to one of the gears, a detent for the carrier an actuating lever and means connecting said lever with the dog and detent for actuating both of the same.

84. In a steam engine indicator, av loosely mounted pulley, reducing gears and means for rotating the pulley from said gears, comprising a carrier which rotates with the pulley, a dog which is carried by the carrier and locks the same to the gears, a detent for the carrier, an actuating lever, means connecting the lever with the detent for actuating the latter, a cone having connection with the dog and adapted to move the same, and means controlled by the lever for moving the cone longitudinally.

35. In a steam engine indicator, a loosely mounted pulley, reducing gears and means for rotating the pulley from said gears, comprising a carrier which rotates with the pulley, a dog which is carried by the carrier and locks the same to the gears, a detent for the carrier, an actuating lever, means connecting the lever with the detent for actuating the latter, an arm, a spring connecting the arm with the dog, a cone engaging the arm, and means controlled by the lever for moving the cone longitudinally.

36. In a steam engine indicator, a frame having lateral connections for the engine and indicator-cylinder, respectively, and provided with a bifurcated portion forming spaced bearing arms, a shaft journaled in said arms, and operating mechanism for the shaft including an operating pulley mounted on the shaft between said arms.

37. In a steam engine indicator, a frame having a bifurcated end forming spaced bearing arms, one of which is chambered, a shaft journaled in said arms, an operating pulley mounted on the shaft between said arms, a second pulley, adapted for connection with the indicator drum, and l'edtuiing gears between the shaft and second pulley, comprising elements mounted in said chambered portion of an arm.

38. In a steam engine indicator, a frame having a bifurcated end forming spaced bearing arms. a shaft journaled in said arms and having an end projecting beyond one of the same, an operating pulley 1nounted outside one of said arms, and an incased spring mounted on said projecting end of the shaft.

39. In a steam engine indicator, a frame provided with a gear box, a second gear box adjacent to the first, a train of reducing gears arranged in said boxes, a pulley arranged adjacent to the second gear box, means for connecting it to said train, an operating shaft connected to said train, and an operating pulley connected to said shaft.

40. In a steam engine indicator, a frame having spaced arms one of which is provided with a gear box, a second gear box removably secured to the first box, shafts extending through said arms and boxes, one shaft movable and the other stationary, an indicating pulley mounted on the stationary shaft beyond the second gear box, an oper ating pulley mounted on the movable shaft between the arms, an incased spring mounted on the end of the movable shaft remote from the indicating pulley, and a reducing train of gears having connection with the movable shaft and indicating pulley and arranged in said gear boxes.

11. 1111 a steam engine indicator, gearing, a mllev, and means for loclnn and releasing; the polle and :aring with alien to each other, comprising a :arrier whlch moves with one of such parts, means for fixing it e the other off such parts in one direction onl' ot the movement of the latter, and means for locking the carr'er operable thereon only in one direction of movement.

1-12. "1 steam engine indicator, gearing a pnllej, and means for locking and releasing the pulley and gearing with relation to each other, comprising; a :arrier which moves with one of such parts means for 11: it to the other of such parts in one direta'ion only of the movement thereo't, means for locking; the carrier operable thereon onl in one direction of movement and opera ting mechanism for said means, acting thereon to release the carrier from its lockii'ia' means and fix it to one of said parts.

5 3. in a steam engine indicator, an indidrnnn an operating shaft, means 1b the shaft oscillated, a looselv indicator pulley connected with the y f 1 transmitting move in the gearing to the pulley, comrrier movable with the pulley, a

dog; i-arried b v engage the gear prisin a the carrier and adapted to 1 1ga detent to engage the carrier, 1 1 d means for simnltaneonslv movto dog; into operative relation with the 1d the detent 01117 of one 'ative relation carrier and vie 1 a team engnn 1 1 sha'l t an open nulle and its Cord,

111115; having; connection with the pulley a casing tor the spring, a rod extendmg over 1 the pulley and provided with an we tor the cord, a support to which one end ot the rod is secured, means whereby the support is reci pro :ated by the shaft and a bearing;- for the other end of the ro h carried by the spring casing;

-15. In a steam engine indicator, a shatt means for turning the shaft in opposite directions, one of such means comprising an operating pulley a sleeve on the sha'tt a support thrcadably mounted on the sleeve and reeiprocated thereby and a lll'llit carried by said support and adapted to engage said pulley.

116. In a steam engine indicator, a shaft, means for turning the shaftin opposite directions, comprising a pulley fixed to the shaft, a sleeve mounted on said shatt and fixed to said pulley and projecting); theretrom, a support threadablv monnted on the sleeve and reciprocated thereby and a brake arried by said support and adapted to on gage said pnlle v.

1:7. in a steam engine indicator a longindinally stationar shaft means tor lurn- 1g the shaft in opposite directions, con'ipris- 1; an ope ating pulley and its oord, a sleeve mounted on the shaft and moved therewith 2. supportthreadablv engaged with the sleeve to move longitudinally of said sha'lit and a brake and a cord guide both carried by said support.

.111 testimon whereof I allir' my signature in presence ot two witnesses.

Pi'tlt lilGY I (Ht-Alt llitnesses:

10111 B. 'ionnm', 11,11 G. 1111 011111111.

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