US1194640A - Fuel-supply-recording device - Google Patents

Description

G. C. KERR.

FUEL SUPPLY RECORDING DEV!6E.

APPLICATON FILED MAR. 24, 1915 1,1 94,640, Patented Aug. 15, 1916;

5 SHEETS-SHEET I.

\ -G.C. KERR. wfrufaiisyjeiv RECORDING DEVICE.

APPLIC'ATQON FILED MAR. 24, 1915,.

Patented Aug. 15, 1916.

5 SHEETS-SHEET 2.

Wr /fiasses" N; p?, (YE /MW G. c KERR. FUEL SUPPLY RECORDlNG DEVICE.

APPLICATION FILED MAR. 24. I915- 1,1 94,640 Pat-entedAug.15,-1916.

5 SHEETS- SH EET 3.

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G. C. KERR.

FUEL SUPPLY RECORDING DEVICE.

APPLICATION FILED MAR. 24, 19.15.

Patented Aug. 15; 1916.

5 SHEETS-SHEET 4.

1 7 70 /7/0r? $607 76 6.. ffzv."

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G. C.-KERR.

FUEL SUPPLY RECORDING DEV|CE.'

APPLICATION man MAR. 24. 1915.

1,194,640. Patented Au 15 191 5 SHEETSSHEET -5.

GEORGE-C. KERR, BRAINTERD, MINNESOTA.

EU L-sUrrLY-RiacoRnmG DEVICE.

To all whom it may concern:

Be it known that I, GEORGE C. KERR, a citizen of the United States, residing at Brainerd, in the county of Crow Wing and State of Minnesota, have invented certain new anduseful Improvements in Fuel-Sup ply-Recording Devices, of which the following is a specification.

My invention relates to fuel supply recording devices for boilers, and has for its object to provide in association with the door of a furnace for the boilers'certain mechanism which will automatically record each time the door is opened and closed,

will automatically-record each shovelful of coal thrown into the furnace, will record each time the boiler blows off through the safety valve, and provides a'recordable device for rendering it impossible for the fireman to throwcoal into the furnace without properly distributing the same.

In carrying out my invention, I provide a record tape with instrumentalities for advancing a-nd punching saidtape in accord ance with the operations .above specified in combination with a clock which makes a record mark upon the tape at the expiration V .-of each period for which the clock is set,

such period being preferably long enough so that it would be impossible for the furnace to be neglected by the fireman over as great a period. 'The instrumentalities above referred to consist of'record actuating mechanism which advances the tape each time the door is opened and punches the tape each time'the door is closed, which punches and advances the tape ;each time a shovelful of coalis thrown into the furnace and which marks the tape each time the engine pops off and will continue to make such m'ark until the safety valve exhaust ceases.

- In addition to the above devices a further and extremely" important part of my invention is a door .obstructer which is pneumatically caused to. be moved across, the door of the furnace after the same is opened so as to obstruct said door and prevent throwing another shovelful of coal into the furnace before the door is closed and again reopened. This obstructer, however, is not moved so rapidly but what the fireman can throw in a shovelful of coalafter the door is opened, andif such shovelful of coal isthrown properly so thatthe shovel strikes Specification of Letters Patent.

. Patented Aug. 15, 1916.

Application filed March 24, 1915. Serial No. 16,664.

the bottom of the fire-door opening to seatter the coal as should be done, the moving means for the door obstructer will be released and the same momentarily withdrawn Y giving time to throw in another shovelful of coal. But this requires that the shovel shall strike the bottom of the fire-door opening which includes a device for effecting the record above referred to. The movement of the door obstructer also results in marking the tape and making a record thereon. It will be apparent from the above that, generally stated, the record tape resulting from these operations will show exactly the manner in which the furnace has been fired.

The applicability of the device, particularly to locomotives where the waste of coal from improper firing may be, and usually is, very great will be fully apparent, for with such a record the traveling engineer can checkup on the fireman, and those who fail to comply with the regulations and practices of good firing canbe called to task and if necessary dismissed. The use of the apparatus will, therefore, result in greatly improved Work on the part of firemen and' in large saving of coal consumption.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularlypointed out inv the claims.

Inv the drawings, illustrating the application'of my invention, in one form,Fig-

ure 1 is a front elevation of a boiler such as a' locomotive boiler head showing the the door and openings connected therewith. Fig. 2 is a fragmentary view of a sliding type, door associating with my improvements. Fig. 3 is a section through the door shown'in Fig. 1 in closedposition. Fig. 4 is a similar sectional View in open position. F igs.-5 and 6 are fragmentary sectional views showing the door latching mechanism and the means of operating the register upon opening and closing of the door. Figs. 7 and 8 are plan and sectional detailedviews showing means for operating theregister when the boiler, pops off. Fig. 9 shows the means of locking the door in open posit-ion. Fig. 10 is a vertical sectional view of the control devices for the pneumatic mechanism for releasing the door and for projecting thedoor' obstructer. Fig. 11 is a horizontal sectional view, on line l1-1l of 10. Fig. 12 a plan '\'l\)T the registering device with the cover raised iid some parts broken awa v or in section. l t

1;, is a transverse section thron ot the register box. lig. l-lsection across the width ot said box. l'ig. 13 is a detail view showing the clock control lor the time recording mechanism. Figs. l and 1i are views showing the main her or printing the tape Fig. to is a sectional 'lront elevationa' detail view oi oi the parts shown in Fig.

As illustrated in Fig. l. the iler head '2 is provided with a lire ring il surroinnling the opening 2; in the 'l'urnaee orfir-- box and having a door 3:} sup 'iorted e.\' uh-d lugs ll hingmllv connected at 23 with n'a k ets 12o extended utwardly from the lzoilci head. The d or 2 3 is provided with a latch ar 1T centrallv pivoted at 2R to the jl ront of the door and restrained by a keeper 2 said latch bar engaging a latch arm Ho fast on the ring 21. It handle .32 on latch ar 27 is provided for the use or the op rator. 'lhe above is a common torin do r emplo \'ed for locomotive boilers. Another form shown in Fig. '2 in which two sliding members 3 and ll; are adapted to e moved along guide ars :3? and Ill; heing operated bv links 3? and '35 having slotted conne lions tin with the sliding sections 3 5 and 1H. said links eing automaticall v ope 'ated. by well known means not shown. The alternative i'orm of do r is shown in Fig. 2 as on invention is equally applicable to either t \'pe 'l door and because both types of doors are in common use.

is indicated in Fig. l. the latch bar 2? has a radial eXtension ll provided with an angularlv disposed toe l1. \Yhcn the door is swung open the toe -l-l will engage an arm -12 rigidly conuectedwith a rod -lwhich. in turn. is .last to a piston l-t slidahlv mounted in a bore l5 in a casing l6 secured to the boiler head 20. said piston being f rced into normal outward position by means of a coil spring 4? in the hore +l5. The toe l1 also passes beneath a latch lb on the bracket 26 and into a notch 49 it said latch. A swinging latch so connected b v means of links 51 with the latch bracket- 48. and is: also connected by means of a bent rod 52 with a piston 523 in a c vl inder Ti-l secured to the boiler head 20. a coil spring 55 normall v acting to force said piston downward so as to hold the swinging latch Bl) out of the path of toe .1. said latch being operated by means hereinafter described to force said latch 50 upwardly when the door has been opened and hold the samelocked open. as indicated in Fig. a. As

lent

r l lllt best indicated in 5 and t3; the opening and closing of the door operates indicating mechanism as will he later more full ex plained. A. piece 56 155 last on a rock shatt path of the latch bar 2T and also is provided with a leaf spring 'd taigaging the boiler When the door is opened. the lad will force the piece 5t and the enmember 30 jl'orwardlv as shown in 5. \Yhen the door is closed. the latch 1: will engage member ill) and rock the. iece so inwardlv against the l'oice head 2t).

spring ot spring 1 into the position shown in Fig. ll. The rock shaft 5T has thereon an arm (32 to which is pivotallv connected a plunger rod (3 running to a record box at and ell'ecting. in the manner hereinalter described. a recording operation ever time the door is opened and closed In the proper tiring of a boiler furnace. the lireman should strike the shovel containing the coal upon the bottom oi the lire door opening thereb) causing the coal to scatter and spread over the burning surface within the tire box. This is essential to obtain the est results from the coal delivered. to the turnace because it it is thrown in in hulk itwill result in gas being set free, above a. eomparatirelv cool mass of coal so that said gaswill not be consumed and will p: from the l'urnace in the form of black smoke. being wastet'ul of fuel. it import-ant. therefore. that l have provided. means whereby a record will be made ot each shorel'tul of coal delivered to the furnace in the proper manner wherein the shov l is caused to strike the bottom of the lire door opening. and .l have also provided means rendering it impossible to throw more than one shovel'lul of coal into the furnace without so striking the bottom of the lire door opening. To ellect the first of these. results I provide. as shown in Fig. l. a. rod (35 slidablv mounted at its lower end in a bracket W5 secured to the boiler head 20. The upper end of rod (35 has connected therewith a plate (.37 which projects through a slot in the bottom of the tire door ring 2i. the slot and bracket (3(3 forming the means for guiding the plate (37 and rod (35 in vertical movements; A spring (35 surrounding rod 5 between a collar (it) thereon and the bracket (36 forces plate 57 up through the slot so that the sameis projected above the lower surface of the tire door-ring as indicated in dotted lines in Fig. l. livotetl to rod (35 at T9 is a lever Tl which in turn is pirotally connected inttn'mediate its ends to a stand '72 on the boiler head 20. the other end of lever Tl being pivotally connected at T3 with a plunger rod T-t which extends into the recder 54, piston 83 being connected by means of a bent rod 85 with rod 78, as best shown in Figs. 10 and 11.

It will be apparent from the above that when the fireman delivers a sho'velful of coal properly to the furnace, he strikes the shovelupon the plate 67 which will depress that plate, thereby rocking lever 71 to effect a. recording operation in record box 64 and simultaneously oscillating lever 75 to force upwardlypiston 70 in bore 80 and piston 83 in cylinder 84. v

An air cylinder 86 is secured upon the boiler head 20 at an angle such that when a door obstructer rod 87 isprojected therefrom, it may at the end of its movement strike plate 67 and automatically operate the same. The rod 87 is secured to a piston 88 in the cylinder 86 and is normally held in retracted position by a spring. 89 within said cylinder. Compressed air from the storage tank of the engine may be admitted into cylinder 86 above piston 88 through a pipe 90 which, as clearly shown in Fig. 10, is adapted to be placed in connection with the supply pipe 91 by fixed passageways 92,. 93, and 94 in casting 46 and a movable passageway 95 in piston 44 and another movable passageway 96 in movable piston 70, the

- )assa ewa 93 connectin the bores and 80 while the passageway 94 opens into the bore 80 and the passageway 92 opens into the bore 45. All of said openings arein alinement so that when the passageways 95 and 96 in pistons 55 and v70, respectively, are brought into alinement an unobstructed air passageway extending from supply pipe 91 to delivery pipe 90 and cylinder 86 is provided. The normal position of piston under the influence of springs 81 and 82, as

shown in Fig. 10, brings passageway 96 into 10 and 11, thetoe 41 engaging piece 42 pushes piston 44 upwardly so as to bring passageway 95 into alinement with passageways 93 and 94, thereby permitting flow of air to delivery pipe 90 which immediately actuates piston 88 and starts to move ohstructer member 87 across the opening of the the door. As thls obstructer 1S moved against the force of spring 89 some time will elapse after the beginning of its movements before it obstructs'the fire box opening so much as to prevent the proper introduction of a shovelful of coal. ciently ample to permit the fireman to gather and deliver a shovelful of coal after the door is opened. If this is done properly, the shovel will be struck upon the plate 67 whichwill be depressed and will, through lever and rod 78, force piston 70 up This time is sufliwardly, thereby putting passageway 96 out of alinement with passageways 93 and 94 and cutting off the supply of air. At the same time, a passageway 97 in piston 7 0 is brought into alinement with a passageway 99 through casting 46 in communication with delivery pipe 90 and another passageway 100 in said casing which opens to at.- mosphere. This releases the air from back of piston 88 which, together with the obstructer, is immediately restored to initial position.

Upon the boiler head 20 adjacent cylinder. 86 is a small cylinder 101 connected by pipe 102 with cylinder 86 below the normal position of piston 88, so that when compressed air is admitted to cylinder 86'above piston 88 through pipe 90, and the piston 88 is moved. in the cylinder, air will beadmitted through pipe 102 to cylinder 101. A piston 103 in cylinder 101 has the rod 104 thereof connected with a lever 105 pivoted adjacent its center to a stand106 secured to boiler head 20. The other end of lever 105 is pivotally connected with a plunger rod 107 which goes to the record box 104, thus making a record every time the piston 88 and obstructer 87 connected therewith have been actuated and restored to position.

The operation of the member 50 for locking' the door in open position is effected at the same time as actuation of the obstructer through compressed air delivered from pipe 91. As best shown in Fig. 10, this is accom-' plished by means of a pipe connection 108 which admits airlthrough a' check valve 109 and port 110 to cylinder 54 below'piston 53., This drives the piston 53 upwardly and .through the bent rod connections 52 rocks the latch 50 to the locking position shown in Fig. 9. A port 111 opens from cylinder 54 into cylinder 84 and is normally kept closed by the piston 83 in the lastnamed cylinder. The operation of, these devices will be apparent. When the door '23 is thrown open the toe 41 engages the bar 42 communication from compressed air pipe 91 to pipe 90 and cylinder 86 above piston 88 and also through pipe108 to cylinder 54: be-

low piston 53.. This has the efliect of immediately beginning. the movement of oband brings port 95 into position to "open cinf pis l to position l. lircman wihout unlocking this cannot cl e the door device and this can onl v he etl'ected hv properlj' throwing shovell'ul olf coal into the furnace so that the shovel striltes the plate oi. as it should for stuttering the coal. The liretnan has time to do this helore the ohstructer hf? gets in tront ot the door. it he operates with proper expedition. lt however. he delavs or thror-s: the coal in without striking the plate 7, the ohstructer will he moved across the furnace door and it will he impossihle for the fireman to throw another shovel tul ol coal in until he has manually operated the plate (37 and parts: com nected therewith. thus necessitating the making of a record against himselt when no coal has heen delivered to the furnace.

hen the shovel strikes the plate t'n'. it not only results in the making of a record. as will hereinafter he pointed out. hut it forces upwardlv the rod TS and with it pistons T0 and s3. movement of the 'lormcr resulting lirst in tweaking the connection trout pipe 91 to pipes tilt and m and then opening to atmosphere pipes and too through passagewafv' UT. thu releasing the prcssure in cylinder no and permitting door ohstructer ST to he restored to initial position h v spring si Meantime. piston 3 has tirst uncovered port 111 and then has travclcd past a port Itl'l open to the atmosphere which permits air to exhaust l'rom cylinder 3 t. when the spring 33 will force piston 71:, downwar-.l rocking the latch 30 and unlocking the door. The. door can then he closed. ll. however.

this is not immediately done. the springs Flt other shoveltul of coal or make a record to that ctl ect in order to close the door. It is; to be noted also that it will he im iuissihle to close the door when the ohstructer ST is in front of the same as the door is: locked at all times that the ohstructer is projected. Immediately upon closing the door. the toe ll comes awa; from'pieee t2 and releases the piston ll so that spring *t-T can return the same to initial position in which communication from compressed air pipe l is cut oil. A notch 11 3 in the side of piston l is so positioned that when said piston is in normal inoperative position the notch will span the opening from pipe 9;. and a duct lt-lleading to atmosphere. therehv permitting release of any air that may have heen trappcd in pipe and cylinder St The sliding doors illustrated in Fig. 2 operate the above indicated instrumentalities in the same manner. the ditlerence heing merctv in the arrangement ot' the actuating parts. is shown. a levc pivoted at 1th is pivotally connected at .ltT to plunger tl l and has a toe ltt which is caused to taigagc a piece lt l on sliding door fit in leat spring 12o. h v which means the record of opening and closing the door is eli'ected. The door 33 directly engages a piecc tQ't corresponding to the arm l2 hv which piston it is aetuated and a latch 122 is conncctcd with rod 52 and engages; in a notch 123 in door 3 3 l'or locking the same in opcncd position.

Within the record hox t'rt are journaled rihhon drums til, 123 hetween which e.\' tends a recording rihhon it'll). t'pon cross partitions 1'27. li in the record hox is a tahle 12H over which the rihhon or tape lit) is fed and ahovc the tahle til is a plate l ltl provided with a plurality of nipples till. llolcs l li are provided in the tahlc til and punch rods 1 3 .5. 1 3 t. r17). 136, and t cX- tend through apertures in the nipples t tt and are adapted to cooperate with the holes 1 32 to punch records in the tape till. 'lhe punch rods are spring held out ol' engagement' with the tape. as clcarlv shown. ltod lZlT in operated h v a linger plccc' l l and is adapt d to matte a lltill'h such as indicated at. l 'l l in to and t7 upon the tapc 12 3 showing the point on the tape where any particular engine crew taltcs over the engine. That is, in locomotive practice. thc marlt t lt would indicate the time of coming out ol the round house. Punch l lo pivotallv connected with a lever ll l which is pivoted on a shal't t lt mounted on the cross pieces 112T. tZN. The lever l l is: pivotally connected at ll. with a litter rod ll l slidahle in a hearing in a shell It. and having its: lowcr end positioned in a socket 113. said socltct heing 'l'ormed with a sloping rear wall tl A spring t ll normally pushes rod l t l into position such that a sloping toe l lo ma} he cngagcd h a dog ill on the plunger rod Tlwhich is actuated hv the engagement ol' the shovel upon piccc lT. 'lhc a tuation ol the plunger rod will lift the rod il and oscillate lever .l-lt sutlicicntlv to cause punch har l l to punch the tape whcn the sloping toe HR ma v slide oil the dog l'li permitting the lc ver t ll) and rod tl l to return to normal position and the punch har 71 313 to he withdrawn out of the tape till. The rod T l has thereon a pair ol' collars- 15o which emhrace the l t'll'h'ttl end ot a lever l d looselv mounted upon a shat't 152 which is journalcd to rotate in hearings in cross pieces tlT. li Fast with lever 151 is an arm 1.32) having thereon a pawl 1.34- which engages the teeth ot a ratchet wheel 1- 3 last on shaft 152.

lt will he apparent from an inspection ot Fig. 1t that when thc plunger T-lis actuated upwardlv hr the proper throwing in of a shovel'l ul of coal. it will roelc the pawl arm parts to initial position and, in doing so,

willrotate ratchet wheel 155. As this wheel is fast on shaft 152 it will rotate a bevel gear 157 fast 011 shaft 152 which, through bevel gear 158 fast in the spindle for roller 125, will operate to forward the record tape Punch rod 185 is 126 theproper distance. connected to a lever 159 journaled upon rod 141 and issimi'lar to and operated from plunger 63 in the same manner. as lever 140. The lever 63 actuates a lever 160 loosely mounted on shaft 152 having an arm 161 carrying a pawl 162 which engages ratchetwheel 155. The plungerrod 163, it will be borne in mind, is actuated by the opening and closing of the door 23 (or 33, 34), closing of the door operating to lift the rod and effect punching of the tape at the same time positioning pawl carrying arm 161 while openlng of the door will, through operatlon of spring 61 and a spring 163 surrounding rod 63 restore theparts thereof rocking the pawl arm 161 and through the ratchet wheel 155- and connections therefrom forwarding the tape. It is thus apparent that after each shovel of coal deposited in the furnace and after each opening of the door the tape will be forwarded a distanceof one notch. The punch marks for these respective records may be different in character, the shovel' marks being as indicated 'at'164 in Figs. 16 and 17, while the door closing marks will be as indicated at 165. The aggregate number of shovels of coal going into the furnace may readily be recorded bya numbering machine indicated diagrammatically at 166 and operated by a lever 167 connected withspi ndle 74 as shown in Fig. 1. 1

- The push rod 107 operated by compressed air from cylinder 103 to show the number of actuations of obstructer 87 actuates a lever v 168- pivoted to rod 141 in a sim'ilar manner or substantially below the shovel marks 16 1.1.

follows that the period .Loftime covered bytothat shown in detail for the operation of lever 140 by push rod 74, a lever-168 operates punch bar 131 tomake record punches indicated at 169 in Figs. 16 and 17. No

forwarding of the tape is effected in making.

this record which will appear either below As above pointed 'out the tape 126 forwarded entirely by theopening of the door and the throwin in of shovelfuls of coal. The forwarding of the tape will not be entirely regularlas'to rate; but it is desirable to mark upon the, tape successively indications which, upon inspection, will show that a given period oftime'has elapsed between.-

any two succeeding marks, from which it any length of tape would be a time equal to the selected periodjrnultiplied by the surrounding said plunger.

' printing of time marks is effected bya clock 170 securedin therecord box asshown' in Figs. 12, 13, and 15. For indicating the quarter hour periods, the clock is provided with a cam head 171 on the stem which normally operates the hour hand, said cam head having a series of four cam extensions 172 with radial drops. A lever 173. preferably provided with a weight 171 has a head 175 which engages said cam extensions 172, said lever being pivoted to a' stand 176. The lever 173engages a'collar 177 on a rod 178, said rod being pivotally connected with a lever,179'journaled upon rod-141. Connected to the lever 179 in front of its point of pivotal connection with rod 141 and by means of a flexible connector 180 is a short arm 181 having a weighted'head 182 to ,which is pivoted thepunchrod 133. The

operation of this device is very plain. The lever 173 is rocked by a cam projection 172 .on thej-cam head 171 which is rotated by the clock. By'this means the plunger 178. is depressed against the force of spring183 Whenthe operation of the clockfinally takes the cam extension from under the head 175 of lever 173 the spring. 183 forces the parts up-' wardly quickly rocking lever 179 and throw ing arm-181' and weighted head 182 downwardly with suificient force to drive the punch rod 133 through the paper .tape 125,

said head'rebounding to' take the rod out of the tape.

Time. marks-which may not be more than a small needle punch are indi cated at 185 in Figs. 16 and 17.

Itjs undesirable to fire a locomotive so as to produce moresteam than can be used, resulting in what is known as pop-ping of the safety valve, thus resulting in waste of fuel.

To keep a record of the number of instances of, such popplng and the duration of each relatively, I providea lever .186 journaled upon a] bracket 187 formed on cross partition 128. Upon an arm of said bracket is mounted a pointed spur wheel 188 which is .adapted't'o extend-through a slot 189 inthe ,tablef129' and engage the tape 126, being normally held out of engagement with said tape by a spring190'. Said spur wheel188 also may extendinto-a'slot 191 in plate 130 so, that when brought into engagement with the tape, the spur wheel will make a perfol rate line which will. be extended through movement of the tape as long'a's the; spur wheel isheld in engaging-position, as indi-j ca-ted at 1921in Fig-.16. To the lever 186 is i attached a rod 193 which extends through the record casing ti-l and a pipe 19% to a rocking levttr 19-3 at the junction of said pipe. The pipe is extended through sections 1% and 1 7 to a point in proximity to the safety valve 198 and through this nipe extends a flexible connector li which is fas tened to a plate 200 pivoted at 201 and projection 202 from pipe 197. as best shown in Figs. T and The plate zoo has a wing 20; which overlies a portion of the steam escape port 20 i, being normally held upon the same by meansof a spring 05. When the engine pops, the force of the escaping steam impinging upon the wing 20 3 will lift said wing and through connections li lElI-l will rock lever 1N3 against the force of spring 1th) so as to project spur wheel 18% through slot 15 and into contact with tape 126 where it will remain until the pressure in the boiler falls sufficiently to permit the safety valve to cut oil. If during the period the door of the furnace is opened or coal is thrown into the furnace the tape will be forwarded and the mark indicating the duration of the escape of steam through the safety valve will be correspondingly extended.

The operation of my device has been very fully given in connection with the detailed description thereof. It-is apparent that by its use a complete record will be made of the character of service rendered b the fire man in firing the engine (whether locomotive or stationary). This record will show the manner of delivering the coal from the shovel to the furnace, will necessarily show aeh shovelful delivered. the total number full of shovelfuls: will show the number of shovelfuls for any fifteen minute period or correspoiulingly foany period which is a multiple of fifteen minutes; will show whether or not one shovel has been introduced into the furnace at each time that the door has been opened and closed: will show how often the steam has been raised in the boiler so that the engine -pops off, and, in general. will show exactly the kind of work the fireman is doing and will enable the road engineer or superintemlent in charge of such operatives to correct deficient operation. to

select the men in accordance with the effectiveness of the work which they are doing, will reduce waste of fuel, and will opcrate as an incentive to the fireman since it makes it possible for the conscientious and efficient man to have the character of his work known.

I claim: I

1. In combination with the door of a furnace, a fuel supply recorder comprising atape, and means within the door opening when the door is opened adapted to be. actuated by the shovel when the fireman throws in a shovelfnl of coal for making a record upon the tape.

2. In combination with the door of a furnace, a fuel supply recorder comprising a tape, means within the door opening ,when the door is opened adapted to be actuated by the shovel when the fireman throws in a shovelful of coal for making a record upon the tape, and. means for forwarding the tape after each actuation.

3. In combination with the door of a furnace, a fuel supply recorder comprising a tape. and means for effecting a record upon saidtape and for forwarding the tape each time thedoor is opened and closed.

4. In combination with the door of a furnace. a. fuel supply recorder comprising a tape. means for forwarding the tape rendered operative by opening of the door. and means for making a record on the tape when the door is closed.

In combination with the door of a furnace, a fuel supply recorder comprising a tape, means for punching the tape including a sliding rod having a bevel faced projection thereon, said rod being mounted for v ide swinging movement when the same has been slid longitudinally a sullicient distance to effect the punching operation, a' plunger having a pivoted toe for engaging said projection to slide the rod until the same becomes displaced laterally to permit passage of the plunger and to return to position upon the return of the plunger, and means engaged by the door when the same is closed for operating the plunger.

('3. In combination with the door of a furnace, a fuel supply recorder. comprising a tape, means for punching the tape, means including a ratchet for forwarding the tape, a plunger, a swinging arm having operative connection with the plunger and provided withia pawl for operating the ratchet when the arm is moved by return movement of the plunger said plunger being adapted to operate the punching means when the same is moved outwardly, means engaged by the door when the same is closed for moving the plunger outwardly, and a spring for returning the plunger when the door is opened.

7. In combination with a boile' and the furnace door thereof, a fuel supply recorder comprising a tape, means actuated by opening and. closing of the door for making a record upon said tape each time the-door is opened and closed, and means adapted to be actuated by the shovel when the fireman throws in a shovelful of coal for making a record upon the tape.

8. In combination with a boiler and the furnace door thereof, a fuel supply recorder comprising a tape, means actuated by opening and closing of the door for making a record upon said tape each time the door is opened and closed, means adapted to be actuated by the shovel when the fireman throws in a shovelful of coal for making a record upon the tape, and means actuated by the escape of steam from the safety valve when the boiler blows off for record upon the tape.

9. In combination with a boiler and thefurnace door thereof, a fuel supply recorder comprising a tape, means actuated by opening and closing of the door for making a record upon said tape each time the door is opened and closed, means adapted to be actuated by the shovel when the fireman throws in a shovelfulv-of coal for making a record upon the tape, means actuated by the escape of steam from the safety valve when the boiler blows off for making a record upon the tape, a door obstruoter, means for moving the door obstructer across the door opening when the door is .opened, and

11. In combination with thedoor of a furnace, a door obstructer, means set in operation by opening of the door for operatmg said door obstructer, and means adapted, to be actuated by the shovel'when the fire-- man throwsin a shovelful of coal for releasing, thedoor obstructer and permitting the same to return to normal position.

12.-.In combination with the door of a furnace, a lock for holding .the door open,

I a door obstructer, means set in operation by opening of the door'for operating said 'door obstructerand for closing said lock, and means adapted to be actuated by theisho'vel when the fireman throws in ashovelful 'of coal for releasing said lock and-said door obstructe'r to permit the door to -'be closed and the obstructer to be returned to-- I and means actuated by the shovel when the normal position.

' 13. In'combination with; the door furnace, a cylinder having a piston thereby, ja door-obstructing arm adaptedto'bd'PTojected by air pressure within the cylinder, at

--jected by air pressure/within the cylinder,

" der and a source of supply for compressed source vof supply for-compressed air and a i normally closed passageway therefor to said cylinder, and means actuated by opening of" thedoor, for opening said passageway.

"14;. In combination with the door ofwt furnace, a cylinder having a piston therein, a door-obstructing arm adapted to be proair pipes -1Il communication with said cylin air, a member normally interrupting communication through said pipes, and means making a I der and a source of supply for compressed air, a piston movable across openings for jected by air pressure withinthe cylinder, 1 'air pipes in communication with said cyl nsaid pipes and having a passageway therethrough adapted to register with the .said openings, means for holding said piston normally so "as to close the pipe, anarm connected with said piston, and' ia member on the door adapted to engage said arm when. the door is, opened and tomove said rpis'ton', andbring sai-d'passageway into, registering position.

a 16. In combination with the door of a furnace, a cylinder having a piston therein,

a door-obstructing arm adapted tobe pro jected'by air pressure within the cylinder, a

springforrestoring the arm to initial position, a source of supply'of compressed'air and a normally-closed passageway therefor to said cylinder, means actuated by opening of the door for opening said passageway, and other means actuated by the shovel when the fireman throws in a shovelful of coal for again closing said passageway to permit'the spring to restore the arm to 'ini tial position.

17. In combination with the door of a furnace, a cylinder having a piston therein,

a door-obstructing arm adapted to be pro jected by air pressure within the cylinder, a spring for restoring the arm to initial position, a source of supply of compressed air and means forming a passageway therefor to said cylinder including an apertured block and a pair'of apertured slides therein each adapted to open or close said passageway, one of saidslides being. normally in f position to open and the other in position to close the passageway, means actuatedby opening of the doorformoving the normally closin'g, slide into openingposition,

fireman'throws ina shovelful of;coal for moving-the normally-opening slide into closing position to permit the spring to restore the arm to initial position;

18. In combination with the doorof a furnace, a cylinder having a piston therein,

and a normally-closed passagewaytherefor to said cylinder,meansactuated by opening of the door for opening said-passageway, and a member adapted to be engaged by said arm whenth'e same is projected to its maximum obstructing position having connections for again closing said passageway to permit the spring to restore the a'rm to initial position. 7

19. In combination with the door of a furnace a cylinder having a piston therein, a door-obstructing arm adapted to be projected by air pressure within the cylinder, a spring tor restoring the arm to initial position. a source of supply of compressed air and a normally-closed passageway theretor to said cylinder. means actuated by opening.

of the door for opening said passageway, and other means adapted to be actuated by said arm at its maXimum projection or by the sho-vel when the fireman throws in a shoveltul of coal for again closing said passageway to permit the spring to restore the arm to initial position.

20. In combination with the door of a furnace, a cylinder having a piston therein, a door-obstructingarm adapted to ,be projected by air pressure within the cylinder, a

spring for restoring the arm to initial posi-.

tion, a source of supply of compressed air and a normally-closed passageway therefor to said cylinder, means actuated by opening of the door for opening said passageway. other means adapted to be actuated by said arm at its maximum projection or by the shovel when the fireman throws in a shoveltul of coal for again closing said passageway to permit the spring to restore the arm to initial position, a recorder comprising a tape. means actuated by opening and closing of the door for punching the tape. meansactuated by the compressed a' as the same moves the arm for punching the tape, and means actuated by the projected arm or the shovel for punching the tape.

21. In combination with the door of a furnace, a fuel supply recorder comprising a tape, a door obstrueter, means set in operation by opening ot the door for operating said door obstrueter, means adapted to be actuated by the shovel when the fireman throws in a shoveltul of coal tor releasing the door obstructer and permitting the same to return to normal position, and means simultaneously actuated to punch the tape.

22. In combination with the door of a furnace, a fuel supply recorder comprising a tape, a door obstructer, means actuated by opening the door for operating the door obstructer, means for terminating operation of the door obstrneter and to restore the same to initial position, means for punching the tape, a block slidably mounted in the fire-door ring in position to be engaged by the shovel when the fireman drops the same upon the bottom of said ring in scattering the coal to the furnace, and levers connected with the said block for simultaneously operating said terminating means and said punching means.

9.3. In combination with the door of a fur-' nace, a fuel supply recorder comprising a tape, a clock and means operated by the clock tor marking the tape at regular inteu vals of time. means within the door opening when the door is opened adapted. to be actuated by the shovel when the fireman throws in a shovelt'ul of coal tor making a record upon the tape. and means for forwarding the tape after each said actuation.

it. In combination with the door of a furnace, a fuel supply recorder comprising a tape. a clock and means operated by the clock tor marking the tape at regular intervals of time. and means for ellecting a record upon said tap and for torwarding the tape each time the door is opened and closed.

25. In coml'iination with the door of a furnace, a fuel supply recorder comprising a tape. a clock and means operated by the clock for marking the tap at regular intervals of time, means for ell'ecting a record upon said tape and for :lorwarding the tape each time the door is opened and closed, means within the door opening when the door is opened adapted to be actuated by the shovel when the fireman throws in a shoyel'lul of coal tor making a record upon the tape. and means tor forwarding the tapeafter each actuation.

2b. In combination with the door of a furnace, a cylinder having a piston therein, a swinging lock for holding the door open adapted to be moved into locking position by air pressure within the cylinder. air pipes in communication with said cylinde' and a source of supply tor compressed air. a member normally interrupting connmmication through said pipes. and means actuated by opening of the door tor positioi'iing said member to complete connnunication.

27. In combination with the door of a lur-' mice. a cylinder having a piston therein, a swinging lock for holding the door open adapted to be moved into locking position by air pressure within the cylinder. air pipes in comnninication with said cylinde' and a source of supply for compressed air. a member normally interrupting connnunication through said pipes. means actuated by open ing of the door tor positioning said member to complete communication.- and means adapted to be actuated by the shovel when the fireman throws in a shovelful of coal for rebreaking con'nnunication 'to permit the door to be closed.

28. In combination with the door of a furnace. a swinging lock. a door obstructer, means including a cylinder for operating the swinging lock by compressed air, mums including a cylinder for operating the door obstructer by compressed air, a source of supply for compressed air and a normallyclosecl passageway therefor leading to both i of said cylinders, and'means actuated by sageway and admittingcompressed air to both cylinders and simultaneously operating the locking device and the door obstructer.

29. In combination with the door of afur- Zing when the door is opened adapted to be actua-ted by ,the shoye'l when the fireman throws in a'shove'lful of coal for making a 'record upon the tape, and a numbering manace, a swinging look, a door obstructer means including a cylinder for operating the'swinging look by compressed air, means including a cylinder for operating the door obstructer by compressed air, a source'of supply for compressed air and a normallya closed passageway therefor leadingto both of said cylinders, means actuated by opening of the: door'for opening said passageway and admitting compressed air to both 1 cylinders and simultaneously operating the locking device and the door obstructer, and means adapted to be actuated by the shovel when the fireman throws a shovelful of coalfor again closing said passageway to permit release of thelock and the obstructer to be returned to normal position.

. 30. 'Afuel-supply recorder comprising a recordin'gtape', means within the door open.

chine actuated by the, same means for keepoftw'o witnesses.

I GEORGE C. KERR. f Witnesses: 1 q

' JOHN 0. Games, FRANK G.- HALL.

3() 'ing a record of, the aggregate number of shovels o'f'coal going into the furnace,

' ,Intestimony whereof I afii-X my signature {in presence

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