US1379528A - Profile-map machine - Google Patents

Description

E. S. CLARK.

PROFILE MAP MACHINE.

NPucfmon msn FEB.15,1919.

1,379,528. atmted May 24, 1921.

Fj l...

60 f Ei A TTOHNEVS E. S. CLARK.

PROFILE MAP MACHINE.

APPLICATION FII'ED FEB. I5, I9I9.

Patented May 24, 1921.

5 SHEETS-SHEET 2.

A TTOH/VEYS WIT/VESSES .E. S-. CLARK. PROFILE MAP MACHINE. APPLICATION FILED FEB.15, i919.

Patented My 24,1921.

5 SHEETS-SHEET 3.

/NVENTOH ,4 TTORNEYS v AWIT/VESSES E. s. CLARK.v

PROFILE MAP MACHINE. APPLICATION FILED FEB. I5, I9I9.

Patented May 24, 1921.

l5 SHEETS-SHEET 4.

/NVENYOR A TTOR/VEYS E. s. CLARK.

PROFILE MAP MACHINE.

APPLICATION FILED FEB. 15| 1919.

Patented Mil-y 1921.

lo @www mmlt EDWIN S. CLARK, F WALLA WALLA., WASHINGTON.

p PROFILE-MAP MAcHINn,

Specication of Letters Patent.

Patented May 24, 1921.

Application led February 15, 1919. Serial No. 277,149.'

I To all whom t may concern.'

Be it known that I, EDWIN S. CLARK, a citizen of the United States, anda resident of Walla' Walla, in the county of Walla Walla and State of Washington, have invented a new and ImprovedY Profile-Map ful Machine, of which the following is a clear, and exact description. The present invention relates to roadmap making instruments. An object of the invention is to provide an improved machine to produce automatically a delineation on a record sheet of the prole of the road traversed by the vehicle on which the device is carried.

The nature and objects of the invention will appear more fully upon examination of the following lspeciication and the accompanying drawings forming a part thereof.

In the drawings, in which is shown an illustrative embodiment of the invention,

Figure 1 is a side view of aprofile-record-L ingq device embodying the invention;

ig. 2 is a top plan view of the same;

Fig. 3is a front view of the device;

Fig. 4 is a sectional view showing the reversing gears of the lmain driving mechanism and the gear shifter therefor, taken on the line 4 4, Fig. 5, looking in the direction of thel arrow;

Fig.- 5 is a side view of the gear-shiftingv mechanism shown in Fig. 4;

Fig. 6 is a detail sectional view-showing the belt tightener of the record-spool driv-l ing mechanism, taken on the line 6 6, Fi s. 3 and 7, looking in the direction of t e arrow; Y

Fig. 7""is a sectional view taken on the line 7-7, Fig. 6, looking lin the direction of the arrow;

Fig. 8 1s a sectional detail view showing the proile tracer together with theoperatino' screws therefor;

ig. 9 is a sectional view taken on the line 9--9, Fig. 3, looking in the direction of the arrow, of the record-carrying drum and the profile-tracer driving mechanism; Fig. 10 is ya sectional view showing the record-(strip, drum-drivin worm, taken on the line 10-10, Fig. 11, looking in the directiono the arrow; 4 Fig. 1l is a detail view showing the same mechanism Fig. 12 is a central, sectional view showingvone of the record-strip carrying spools; 1g. 13 isa central sectional vie'w, taken on the line 13-13, Fig. 1, looking in vthe direction of the arrow;

Fig. 14 is a detail view, taken on the line 14--14 Fig. 15; Y

Fig; 15 1s a detail view partly in Section of the control rod shiftlng mechanism, lshowing the 'parts in operative profile-tracing1 position;

ig. 16 is a view similar to Fig. 14 and taken on the line 16-16, Fig. 17, showing the same parts but in position assumed during the' return of the prole tracer by the `translating screw; V

Fig. 17 isa view similarto Fig. 15 but showlng the parts in the same position as v in Fig. 16;

fFig. 18 is a top plan view of the parts shown in Figs. 16 and 17;

Fig. 19 isa longitudinal, central sectional view of the upper variable-speed friction gear; and

Fig. 2O is asimilar sectional view of the lower variable-speed friction gear.

The device shown in the drawings, for the purpose of' illustrating the invention, is ldesignedI to be carried upon any vehicle and to automatically record upon a'record strip carried in the device a delineationv of the profile of the road or surface over which the vehicle travels. The machine comprises a pendulum 1, Fig. 1, mounted to swing on the pivots 2in a 'vertical plane parallel to the direction of travel of the vehicle upon which the device is carried, thus indicating the grade; and a record-carrying drum 3, Fig. 2, which is driven by suitable mechanism at a speed corresponding to the speed of the vehicle in which' the device is mount'- ed. All parts are mounted in a suitable rigid frame and mayl beinclosed in a casing, if desired. The delineation of the profile of the road is in operation traced upon the record strip 4, Fig. 13, carried by the drum, by a pr'ole tracer 5 which is moved ed on a horizontal shaft 12 having at its farther end a bevel gear 14 adapted to be meshed with a correspondmg bevel ear 15 i on the vertical yprincipal driving sha tL16 of the device, which shaft is hereinafter termed the driving shaft. On the drive shaft 1s slidably mounted a pair of rigidly-connected, reversing bevel gears 1,7, 18, Figs. 5, 3 and 4, a gear'sh'ifter 19 being connected to said pair of bevel gears to shift one or the other thereof into mesh'witha bevel gear 20 upon the end of a horizontal worm shaft 21 vh aving at its farther end a worm 22 meshing with the worm wheel 23- upon the end of the record drum 3. The bevel gears of this train of gearing, as shown, are all miter ears, so that the record-driving worm22 1s driven at the same speed as the first worm wheel 11. It is occasionally desirable, how ever, to provide for driving therecord drum at a faster speed in order that a larger scale profile map may be obtained. Accordingly, adjacent the driven bevel gear 20 of the reversing mechanism is secured a second bevel gear 25, i 3, ofsmaller diameter, as, for

example, o one-half the size; and a gear shifter 26 is adapted to shift either of the gears 20, 25 along `the shaft to position for engagement .with either of the reversing gears 17,18. The reversing gears may then be shifted by means of the' gear shifter19 to engage the driven gear. The gear shifter is operated by means of a hand wheel,28 with rack and pinion connection to shift either of the reversing gears'17, 18 into engagement with whichever of the gears 20,

\25 is! in position to be engaged' thereby.

Two record-carrying spools 30', 31 are rotatably mounted .adjacent to and parallel to the record drum 3. These spools are removably mounted in the usual manner, as shown in Fig. 12, in order to lfacilitate re' moval and replacement of the record strips.

In operation, the record strip wound upon,

one of the spools, is passed over and --around .the record drum 3 and secured to the second record spool. The spools vand the record strip are driven, as shown in Fig. 13, by a tape 32 passing around the record drum and both spools. Such tape engages the surface of the record strip upon the drum and spools, thereby maintaining the proper ratio of s eed of the winding and unwinding spools. luide wheels 33, 34 may be provided to insure accurate runnin of the tape. A tape tightener 35 isprefera ly provided, as vshown in Fig.I 13,` to maintain the tellOil 0f the tape.v This tape tightener, illustrated indetail in Figs'. 6 and 7 comprises a transverse shaft 36 on which are mounted near the ends thereof lianged pulleys 39, 39 over which the aforesaid tape passes. The ends of the shaft are mounted in bearings 40,

which maybe moved forwardly or rear-A wardly by .means of the screws 41 to adjust the tension of said tapes.' Y

The travel of the record strip under the profile tracer is, when driven by the mechanism .above described, proportional to the linear speed of the vehicle. When the vehicle is traveling upon a slope, the linear travel is greater than'the horizontal dis- 'tance traversed. This-unless' corrected, in'- .troduces an errorinvthe profile map. Ac-

cordingly, it is desirable to correct the ery ror -there introduced.

In order to make such correction, a variable-'speed gearing controlled --by the gradeindicating pendulum is provided, so as to reduce the speed of motion ltransmitted to the recordfstrip drum in proportion to the grade on which the 4vehicle is traveling. Such variable speed. gearin consists of a tapered friction cone 44, ig. 1, secured upon the horizontal shaft 12, and a second complementary friction cone 45 secured toa"v parallel shaft 46.v Rotation is transmittedfrom the driving cone to the complementary .cone 45 by means of a friction gear 47 which is slidably mounted therebetween. The position of the said intermediate friction gear is controlled byarms 48, 49, Fig. 13, projects ing vertically upward from the pendulum and engaging the sliding carriage 50 in which saidfriction wheel is mounted. The friction cones or drums are so proportioned that the speed transmitted through such gearing will vary as the cosine of the angle of the grade. Accordingly, .the record drum 3 will be Vdriven ata speed corresponding to the horizontal traverse, instead of being driven f at a speed coi-responding to the linear speed 4of the vehicle.

The parallel shaft 46 is adapted to drive I the vertical drive shaft 16 through the mi'tei` gear 52 splined upon the end of ,the parallel shaft in position to engage a 'corresponding gear 53 fast to 'the drive shaft 16. -The gear 14 on the end of .the horizontal shaft 12 is also splined to its shaft, and a gear shifter 54 is provided to control both gears, where by either hone or the other-of 'the splined gears may be moved into engagement with` the corresponding gear on the drive shaft.

The friction gearing may thus be interposed in the driving gearing or not as it is desired a to make correc'tionfor grade Yor to omit such correction.

In order to produce the profile as desired Y upon arecord strip, it is necessary that the profile 5 driven along the record 1mm 3 1a a dlreetien transverse t0 the movewhichthe vehicle ,is traveling.

I l' A. Jl! :'A I l )merit of the record' strip at a Speed which operation thereof, anti-friction devices -70 will correspond to the grade upl-lor down the OOD- dructionl shownlthis is accomplished by providing a variablespeed gearing lbetween -the drivel shaft 16 which 'is driven constantly, as above described, .and a grade transverse 'to the direction of movement of the record strip.

is under con- This gearing com rises a bevel gear 57,

surface.

vcontrolled by the glade-indicating lum l. For this purpose, the vertically eX-A Fig. 1, secured to e upper end of the vertical drive shaft 16 meshing with a corresponding bevel gear 58 secured to the end of a horizontal s linedshaft 59 on which is splined a lbeve gear 60. A, carriagel is mounted in ways in the, frame of the machine to move parallel to the horizontal4 splined shaft 59, to this carriage is secured a bracket in which is rotatably mounted the splined bevel gear 60, :and a short horizontal shaft having at one end a bevel gear 63 meshing with the splined bevel gear 60 and having at its outer end a friction disk 65. The friction disk is thus mounted 1n the carriage in a manner to be moved laterally while constantly driven {from-the splined shaft. Parallel to theface of the disk -the shaft 66, 9 and 13, is rotatably mounted and carries adjacent its .innerjend a friction wheel 67 and at its outer end a bevel gem' 6.8. The friction Wheel 67 bears against the face of the friction disk. Thel face of the disk is constantly in contact with the friction wheel 67, and as the carriage reaches the central position or moves to one one side or the other thereof is in contact with the 'friction wheel. Y

The center-of the disk 65 is made smooth to prevent useless Wear upon the driven friction wheel 67 when the disk is centrally positioned. The remainder of :the disk may be prepared as desired to provide a driving The positionv of the carriage 61, Fig. 2, and, therefore, of the friction disk 65, is

pendul tending arm 49 rigidly ,connected to the pendulum engages the carriage 61 and thereby as lit swings with the pendulum moves the carriage forward and back, .thus holding the carriage at 4a position always corresponding to the grade. The velocity at which the friction gear 67 is driven andthe direction in whichv it is driven thus correspondto the amount and direction of grade. The carriage, friction ldiskiand associated parts are preferably of aluminum to reduce weight.

.In order to maintain the disk 65. in trueV alinement and accurate running and are provided which are positioned in a plane lto engage the face of the disk.l LAS the disk is moved forwardly and 4backwardly, it is alwa sin engagement with a larger or -smaler number of these anti-friction de- Such devices are conveniently shown and may b e of any desired type. The driven yshaft 66, through the coperating bevel gears 68 and 71, drives the short vertical shaft 72, and the bevel. gears 73 and 74 drives a horizontal grade Iscrew 75. This screw is preferably of slow pitch threaded substantially from end to end and lies parallel tothe record drum 3. The prole'tracer gearing above described at a speed whicht corresponds with the steepness of the grade 0n which the vehicle is traveling, and the -movement toone side or the other oor-responds to the up or down grade. Furthermore, the position of the pencil always re-- cords a position which corresponds to the elevation, from -a given base line for which the device is' adjusted. The angle of the line always corresponds todthe slo on which the lvehicle is traveling. ether lsuch angle is exact or is exaggerated will depend Y upon the screw used and the proportion of -parts and ratios of lthe gearing. side or the other, the center of the disk or It sometimes occurs that when' the road beingmapped includes considerable differ- ,ences of elevation, the width of the record strip-is insuiiicientfor recording the complete prole. In orderl to overcomerthe difiiculties 'thus involved, there is provided mechanism for automatically moving the profile tracer 5 from onel side to the other side of the record strip whenthe `movement 'is s uch that otherwise it would pass beyond the limit ofthe width of the strip. This mechanism is shown most clearlyin Figs.A 2, 8, and 9. A translating screw 8O of rela-` tively high pitch is positioned parallel tol the grade screw 75 and is driven therefrom by means of gears 81 and 82 ata consder- 120 ably greater speed'than the grade screw.'

and pitch of the translating screw, the tracer arm is carried. from side to side with such y may be tracedmanually.

ord strip. The automatic shifting mechanismis shown in detailin F igs..13 to 18. As show'n, the shiftingr mechanism comprises a control rod85 which extends trans-` versely of the device and parallel to the"- `tracer supporting rod 77, such rod being slidably engaged by the tracer arm.y The control rod is provided with adjustable collars or stops 87 87, Fig. 2, in position to be engaged by thetracer arm as the tracer ap.-

proaches the end of the travel -to automatically set in action the *shifting mechanlsm.

The rod passes at each end through a guide and supporting plateA 88', lFigs-1li to 17, having two holes 89, 90 positioned to hold the rod in the positions to engage the tracer,

' arm 5 .with the grade screw and translating shaft 85 moves these second collars 91 out' nected by a slot of a width to permit passcrew, the holes being of the size of a stop collar 91 secured to the rod and being con-j sage therethrough of the rod 85. Sprlngs 92,. 92 spaced from .the guidelplate 88 and having slots through which thel rod. ex-

tends, engage opposite. sides of the collar and tend to hold the same in central longitudinal nposition and in one of the retaining holes 89, of therguide. At each,V end of the rod a plate 921 is secured having a ver= tical slot 93 with central lateral extensions 94, 94, in which slot operates a spring 9.5. The plate is double to extend on oppositea sides ofa bracket 96.which,h0lds the plate upright. The spring projects from a piv oted block 97, Fig. 3, which is oscillated byV an eccentric pin 98 projectingtfrom the end. of the translatin screw sha as to the position shown in dotted lines in Fig. 15, the sprin engages one of the lateral extensions o raise or lower the rod. As the tracer 4arm approaches one of the extreme positions it engages the dog or carrier 87 carried on each end of the shaft 85 and shifts the entire shaft 85 longitudinally, that is trans' yv'ersely with respect to the record carrier,

frame, etc., against the resilient opposition of the plate springs 92 which are engaged by a second collar 91 on each endof the shaft 85. This transverse movement of the of vertical alinement with the slot, connecting the openings. v89 and 9 0 formed in Such section The eccentricthus causes t e spring to move up and down, and when the rod is 'moved laterally,

the slot and tends to the plate '88, .and as this slot isjof suliicient widt to permit passage therethrough of the shaft 85 but to prevent passage of the collar 91 when the collarhas been moved f out of alinement therewith, the .pin which isl being substantially reciprocated engages the plate 921. and shifts' the shaft 85 lvertlcally upward. This vertical movement of the shaft 85 'swings the tracer arm about its supporting shaft 77 so as to disengage the tracer arm from the` de screw 75 and engage it'xwith thetrans ating screw V80, .or1

to disengage it from the translating screw '80 and engage it with the. 'grading screw 75,

as the case may be` it being understood that when the shaft is shifted vertically upward it disenga' es the tracer 'arm`from theA grade screw an engages' it with the trans'- lating. screw and that when shaft v85 is shifted vertically downward it disengages the tracer arm from the translating screw Aandengages it with the grade screw. Such-V shifting of the profile tracer is,of course, the equivalent of shifting the record strip,

and the delineationA traced will be with respect to 'a diferentbase line.Y The rod 85 maybe counterbalanced or yieldably supported as .by springs 99, ifdesired.

It will be understood u n inspection of A the device*- thatv the trans er. of the' profile tracer from one side to theother underthe action of the translating screw is necessarily.

accomplished while the vehicle is traveling Aovera certain easily determined difference in elevation. Accordingly, since this is constant, the dogs or collars v87, 87 ma be so' adjustednn the control rodthat'a owan is made for such-inoperative movement; and when such allowanceis made, the base lines of the profile traced before and after will have a certain desired relation to each other; Y

for example, if profile aper ten inches in width be used, the di erence between the two -base lines of the two profiles traced may .be ten inches, if the adjustment is properly inade.

n is frequently desirable te mme the profile drum, or record-strip drum, by hanld as when introducing or removing a reco strip. `To facilitate such movement, means are provided for disengagin the worm from the ends of the drum. As own in Fig. 10, the worm shaft is mounted in a slidable journal 100 which may be moved out of and into position for 'engaging the worm with the worm wheel by means of a screw shaft 101 threaded into the journal block and secured a inst lon tudinal movement in the frame o the mac e, as indicated at 102. The hand wheel 103, Fig. 2, on the end of the shaft facilitates operation thereof. A suitable counter 104.'may be attached at any convenientpoint in the gear, as, for example, at the end of the'drum, in order to indicate the horizontal distance traversed; and, if de iso sirevd, an elevation meter 105 may alsov meter may be provided with three dials, one of which indicates lthe total ascent, another which indicates the total descent, and the third of which ma indicate the change of grade,`that is, the iii'eren'ce. v

It is desirable to provide. means to lock the pendulum against swinging motion when lthe machine is not in operation but is being carried. Accordingl I provide a lockin bolt 108, Fi 3, w ich may be inserte through a ho e in the frame and into a recess in the pendulum. Anti-friction rollers 109 are provided in the frame.

It is understood that the gearing hereinbefore described may be designed with regard to the. particular requirements as to range of grade to be-recorded and as to accuracy of resultsl required. Satisfactory results may be obtained for' recording grades of twenty-five er cent. or less if, 1n the machine especia ly illustrated in the drawf ing, the variable-speed friction gearing which modifies the speed of the drive" shaft in accordance with the de traversed, is made substantially asl fo lows: the friction gear 44, one inch' in diameter at its'centerand .976 inch in diameter at each end; the curve of an element of the surface bein of a radius of 162 inches; the gear 45 one inch in diameter at its center, 1.024 inches in di' ameter at each end, the curve of an element Vof the surface being of a radius of 162 inches; and the distance from the pivot 2 of the pendulum to the center of the intermediate friction inches. The istance from the pivot 2 of the pendulum tol the center of the grade disk 65 may be twelve and one-half inches, and

the grade disk may be of a diameter of six and one-quarter inches. The grade screw and gearing connectin the same is designed accordingly to suit Y e profile paper used.

It will be understood that while I have illustrated an operative .embodiment of the invention, chan es may be made without departing from 't e spirit of the'invention as set forth.v v

VHaving thus described my invention, I

,i claim vas new and desire to secure by Letters Patent:

1. In a prole delineatmg device for use on a traveling vehicle, a drive shaft; means for driving said drive shaft at a speed corresponding to the horizontal traverse of the vehicle; record-strip supporting means; selective-speed gearing driven by the drive shaft land coperating with the record-strip supporting means `for feeding a record strip at any one of a plurality of speeds to vary the scale of the profile; a prole tracer mounted to engage and traverse the record s transversely of the record strip; a

ear 47, six and one-quarter stri and driving means driven vby the drive` l, l

sha t to'move said tracer transversely of the record strip at a speed corresponding to the grade over which the vehicle i-s travelf ing. 70

.2. In a rofile delineating device for use on a trave ing vehicle, a drive shaft; means for driving said drive shaft at a speed corv responding to the horizontal traverse of the vehicle; record-strip supporting means; selective-speed gearing driven by the drive shaftand coperating with the record-strip supporting means for feedinga record strip at anyone of a plurality of speeds to varythe scale of the profile; a profile tracer movable ade indicating device; and variable speev gearing 'driven by the drive shaft and controlled by the grade indicating device to move the profile tracer transversely at a speed corresponding to the grade over which the vehicle is traveling.

3. In a profile ,delineating device for use on a traveling vehicle, a driveshaft; ymeans for driving said drive shaft at va speed corresponding to the horizontal traverse of the vehicle; record-strip supporting means; sin` gle-speed gearing driven by the drive shaft and coperating with the record-stripl supporting means for feeding a record strip; a profile tracer movable transversely of the record strip; a grade-indicatingdevice; variable speed gearing drivenv by the drive shaft and controlled by the grade indicat- -ing device to move the profile tracer transversely in a direction and at a speed corresponding to the grade over which the vehicle is traveling; and means for moving the profile tracer relatively quickly from one extreme transverse position to the opposite extreme transverse osition.

4. In a profile delineating device for usev on a traveling vehicle', a drive shaft; means for driving said drive shaft at a speed corresponding to the horizontal traverse of the yehicle; record-strip supporting'means; single-speed gearing driven by the. drive shaft and coperating with the record-strip sup- 'porting means for feeding a record strip;

a profile tracer movable transversely of the record strip; agrade indicating device; variable speed gearing driven by the drive shaft and controlled by the' grade indicating device to move the prole tracer transversely ina direction and ata speed corre- .120

onding to the grade over which the 'vehicle is traveling; and auxiliary means cooperating with the variable-speed gearing and automatically set in operation' as the fprofile tracer approaches one extreme of its travel to move said tracer to the opposite extreme of its travel. 1 5. In a prole delineating device for use on a traveling vehicle; a frame; a drive shaft carried by said frame, means for driving said drive shaft at a speed corresponding to the' travel of the vehicle, carriedby said frame; record-strip supporting means carried by said frame; gearing driven by the drive shaft and coperating -with the record-,strip supportingmeans for feedin 'a record strip, said gearing being carrie by said frame; a

rofile tracercarried by the frame and sli ably mounted for movement transversely of the record strip and'.

means for -driving said profile tracer including a friction wheel carried .by 'fthe frame; ways carried bythe/frame and extending transversely of the .friction wheel; a carriage mounted in said ways, :1 -friction disk mounted upon' said carriage engageablewith said friction wheels; and a gradecontrol pendulum suspended Yfrom said frame and actuating said carriage whereby to move said friction'wheel relative to said friction disk and vary the speed of the profile tracer correspondingly with the grade over which. the vehicleis'traveling.

6. In a device of the character described,l

a movable record strip, a profile tracer mounted to move transversely of the record 4strip and to. engage the same; a screw of relatively low pitch with'which said profile tracer is engageablefto be moved thereby; a second screw arallel thereto and of relatively high pitch with which said profile tracer isengageable alternatively withv said low-pitch screw; a grade-indicating device;

ss'rvariable-speed gearing controlled by thegrade-indicating device to drive said lowpitch screw at a relatively low speed and said high-pitch screw at a relatively y hifglh speed; and means for holding said pro e' tracer in. coperative engagement with said screws alternatively.

7. In a device ofthe character described, a movable record strip, a prole tracer mounted to move transversely of the record strip and tol engage the same; a screw of relatively lowpitch with which said profile tracer is engageable to be moved thereby); a

second screw arallel thereto and of relatively high pitch with which said profile tracer is engageable alternatively with said engagement with one screw to en 8. St lus shifting means for use on a pro-- file delineating device including a stylus, a stationary supporting shaft on which'said 'stylus is mounted for sliding and swinging movement, a vertically and longitudinally movable shaft associated with said stylus,- and means` adapted to shift said vertically movable shaft to reverse the motion of said stylus when it approaches either extreme. position of travel.

9. Stylus shifting means for use on a proiledehneating device including a stylus, a 'stationary' supporting shaft on which said stylus is mounted for sliding and swinging movement, and a movable shaft associated with said'stylus to reverse the motion of said stylus when it, approaches either extreme position of travel.

` 10.- In a' rofle delineatingidevice for use on a trave ing vehicle; a frame; a drive shaft'c'arried by saidframe, means for driving said drive shaft at a-speed corresponding to the travel of the vehicle, carried by said frame; record-strip supporting means carried by'said frame; gearing driven by the drive shaft and coperating withth'e record-strip supporting means for feeding a-record strip, said gearing being carried by said frame; a profile tracer carried by the frame and slidably mounted for movement transversely of the record strip; means -for driving said profile tracer including a friction wheel carried by said frame, ways carried by said frame and-extending transversely of said friction wheel, a carriage mounted Vin said ways; a friction disk journaled on'V said carriage `and engaged withsaid friction wheel, a jack shaft carried b said frame and. having its axis .p aralle to the'fline ofmotion of said car- -riage and arranged adjacent said carriage,

gearing for driving said friction disk from said jack shaft carried by said carriage. and including a pinion slidably keyed" on said jack shaft Aand a ade-controlpendulum suspended f rom said frame and actuating said carriage Whereb to move said friction wheel relative to saidyf'rictiondisk and vary the` speed of the profile tracer correspondlingly with the grade over which the vehicle is traveling.

11. Stylus shifting means for use onl a profile delineating device including a stylus,

a stationary supporting shaftconv which said stylus is mounted for sliding and swingingy movement and va vertically ymovable shaft associated with said stylus thereby to effect reversal of motion of the stylus whenit approaches either extreme position of travel..

12. Stylus shifting means for use on a profile delineating device including va stylus,

a supporting shaft uplonwhich said stylus is mounted; avertica y and longitudinally movable shaft associated with said stylus; a collar carriedon each end of said last mentioned shaft adapted to be enga ed by the lstylus to move this shaft longitudinally, and' means operative to move said last mentioned shaft vertically When it has been moved longitudinally by said stylus thereby to effect reversal of motion of the stylus when it approaches either eXtreme position of travel.

13. Stylus shifting means for use on a profile delineating device including a stylus, a supporting shaft upon which said stylus is mounted, a vertically and longitudinally movable shaft associated with said stylus, a` collar carried on said last mentioned shaft adjacent the point of extreme travel of the stylus and adapted to be engaged by the stylus to move this shaft longitudinally; means resiliently resisting longitudinal movement of said shaft; means preventing vertical movement of the shaft, except when it has been displaced longitudinally; and means operative to move said last named shaft vertically when it has been displaced longitudinally thereby to effect reversal motion of the stylus when it approaches either eXtreme position of travel. v

14. Stylus shifting means for use on a profile delineating device including a stylus,

a supporting shaft upon which said stylus is mounted, a vertically and longitudinally movable shaft associated with said stylus, a collar carried on said last mentioned shaft adjacentthe point of extreme travel of the stylus and adapted to be engaged by the stylus to move this shaft longitudinally; means preventing vertical movement of the shaft, except ,when it has been displaced longitudinally; and means operative to move said last named shaft vertically when it has been displaced longitudinally thereby to effect reversal motion of the stylus when it approaches either extreme position -of travel.

15. Stylus shifting means for use on a profile delineating device including a stylus; a grade screw associated with said stylus; a translating screwiassociated with said stylus; a stationarysupporting shaft on which said stylus is mounted for sliding and swinging movement; and a movable shaft associated With said stylus to reverse the motion of said stylus when it approaches either extreme position of travel. v

EDWN S. CLARK.

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