Sept. 16 1 4- e. E. CASSEL SPEED INDICATING APPARATUS Filed July 9. 1923 4 4 Shuts-Sha l sq n 16 1924."
G. E. CASSEL SPEED INDICA'IING APPARATUS Filed July 9. 1923 4 Shoots-Shoot 2 Sept. 16 1924.
s. E. CASSEL SPEED INDICATING APPARATUS Filed July 9. 1923 4 Shuts- Shoot 5 S pt 16 1924.. 1,508,644
- G. E. CASSEL v Q SPEED INDICA'IING APPARATUS Filed July 9. 192a 4 sham-sum 4 T 157- T'- -11. z 1
bodiment of this invention- Patented Sept; 16, 1924;
UNITED STATES 1,508,644. PATENT OFFICE.
GUNNAR ELIAS CASSEL, OF STOCKHOLK, BWEDENQQASSIGNOB '10 ARTUR LEFFLEB,
. OF DJUBSHOLH, SWEDEN.
Application filed July 8,
To all whom it may concerfl:
Be it known that I, GUNNAR ELIAS CAssnL, a citizen of the Kingdom of Sweden, residing at Stockholm, Sweden, have invented new and useful Improvements in Speed-Indicating Apparatus, of which the following is a specification.
The present invention relates to a speed indicating apparatus for motor vehicles.
An object of this invention is to rovide an apparatus of the said kind whic automatically may produce a tem orary indication of the speeds of the ve icle during a limited distance which always terminates at that point of the road travelled where the vehicles is when the reading takes place. The said indicating o eration includes a temporary setting of a 'nstable pins under the control of a centrifugal governor (or tachometer) driven. from the vehicle in synchronism with'the speed of the vehicle at each moment so that the pins, when, set, will represent a speed diagram of the distance last travelled, and after a certain distance has been travelled subsequent to the setting of any pin the latter will be restored automatically.
Another object of the invention is to, provide an apparatus of the said kind in which levers pivotally mounted in a rotatable disk are successivel set into positions corresponding exact y to the speed of the vehicle at the moment at which said setting operation is effected under the control of a centrifugal governor (or tachometer).
A still further object of the invention is to provide an apparatus of the kind set forth which does not only indicate the speed of the vehicle at each moment under the control of the governor but also gives an indication of the maximum speed or another predetermined speed during one or more predetermined distances.
The above said and other objects of the invention will more clearly appear from the following detailed description of some embodiments of the invention reference being had to the accompanying drawings in which:
Figure 1 is an elevation and Fig. 2 a plan view of an apparatus accordin one em- 1g. 3 1s" a vertical section on the line A-BC in Fig. 4, and Fig. 4 is a horizontal section on the line EF in Fig. 3. Fig. 5 is a deve1op- 1923. Serial No. 650,445.
ment of a speed dialgram taken with the apparatus shown in igs. 1-4.
Fig. 6 is a vertical cross section of an ap paratus according to a second embodiment of the invention. A Fig. 7 is a front elevation of this apparatus. view.
Fig. 9 is a front elevation with parts removed of an apparatus according to a.
Fig. 8 is a detail third embodiment of the invention. .Fig:'
apparatus is used so as to rotate with an angular velocity proportional to the angular velocityof said wheel. The gears 2 and 2 transmit the rotary movement of shaft 1 to shafts 3 and 4 respectively. The
shaft 3 which rotates at a comparatively high speed carries a centrifugal governor" (or tachometer) which, while it may be of any type desired is herein shown as a ring 5 mounted to rotate with the shaft 3 while at the same time being free to swing about 35 an axis at right angles thereto. The swinging movement of the ring 5 is counter-balanced by a spring 6 so that the ring will assume a more'or less inclined position relatively to the shaft 3 according as the, number of revolutions of shaft 3 varies. A link 7 transmits the swinging movement of the ring 5 to a slidably mounted sleeve 8 the vertical position of which will thus depend on the speed of the vehicle. which is driven at a. comparatively low speed carries a drum or disk 9 fastened to t 1e shaft 4, said drum having near its periphery a series of vertical borings loosely engaged by pins 10 mounted to slide in 109 said borings. The pins 10 may be easily displaced in the vertical direction of said borings but may be held against movement by locking members or pawls 11 formed at their fore ends as knife-edges 11 and acted 105 on by springs 12 tending to push the pawls forward to cause them to engage the pins 10 which may be formed with teeth or'serrations to facilitate such engagement as will appear from Fig. 3. The disk 9 is posi- The shaft 4.-
tioned so as to cause allof the pins upon the rotation of the disk to successively pass exactly above the sleeve 8. A cylinder 13 attached to the frame of the apparatus serves to release each pawl from its respective pin immediately before the in passes over the sleeve 8, said cylinder 13 eing provided to this end with a cam 13 adapted,
when the disk rotates, to pusheach pawl 11 away from its pin. Thepins rest with their lower ends on a helical surface 12 till they reach a point exactly above the sleeve 8 wherethe said surface terminates. The pins will then successivelyl-drop down on the sleeve 8 to be thereupon immediately locked in the position determined by the sleeve 8 due to the fact that the pawls 11 are released upon the continued rotation of the disk 9 and allowed to again lock the corresponding pins. fUpon the continued rotation of disk 9 a' number of pins adjusted into'diiferent' heights will thus successively Said pins will remain in their set appear. positions during. a period of tune. corresponding for instance to half a revolution by the upper ends, of the operated pins for successive points of the distance last travelled'by the vehicle.
After a pin; has moved 180 awa from thesleeve 8 the? corresponding paw .is released by the cam 13" of the cylinder 13,-
said cam being shaped so as to allowthe pin to be in released condition until a inzpassing above the sleeve 8. Durin t is period the pin is lifted by "the helica surface 12 to a level corresponding to the highest speed possible of the vehicle. The pin, having completed a cycle of movement and again reaching the sleeve, may 'be again set in the manner described. It should be noted that all writing pencils or similar appliances for recording the speed are dispensed with. With reference to the apparatus illustrated in Figs.
6-8 the numeral indicates the casing of the apparatus. Said cas- I ing is covered at its front by a diskof glass '101. Mounted within the casing near the rear wall thereof is a shaft 102 adapted to be driven from any of the wheels of the' vehicle on which the apparatus is use or from any other member rotating syn hronously therewith. The shaft 102 carries the governor weight 103 mounted in an oblique "POSItIOH and .connected by a link 104 to a sleeve105 slidable in an u and down posi-.
tion on the shaft 102. The upper end of the sleeve 105 is adapted to engage a channel-shaped guide-way 107 pivotally mounted on the-journal 106 (Fig. 8) the side-walls of said guide-way converging towards the free end thereof. The shaft 102 is formed as 'an endless screw, as shown at 108 e'n-' gagedb a worm wheel 109 fixed on an interme iate shaft 110. Carried by the said shaft 110 is also a toothed pinion 111 in engagement withan internally toothed 'rim 112. formed on a rotatably mounted disk 113. Pivotally mounted in'said, disk .are a great number of levers 114 forming together an annular series of levers concentric to the axis of the disk 113. The ion er. ends .of said .levers" 114 engage in ra ial guide-ways or slots 115 formed-in a dial 116 rigidly attached to the disk 113, said dial having, preferably, a number of circular scores 120 (Fig. 7) corresponding to differcut speed (as froomO to 60km. an hour).
The shorter ends of the levers 114 en age the guide-way 107 when passing t ere above during the rotation of the disk 113, thereby setting the levers into positions corresponding exactly to the speed at which the vehicle is travelling at the moments .at
which the setting operations take'place,tliat I is the moments at which the said shorter ends of the levers leave the narrow end of the uide-way 107. To maintain the levers in t eir set positions each lever is acted on by a holding spring 117. engaging a surface 121 of the ever which is concentric to the journal of the lever. Said sprin is 1 liftedout of engagement with said su ace .by a fixed guide-way or cam 118 immediate- 1y as the shorter end of the lever engages the guide-way 107 so that the setting ofthe lever ma take place without causing any ,perceptib e resistance on the governor.
The ratio of gearing existing between the shaft 102 and the disk113 may, for in-' stance,be adjusted so that, while the vehicle travels a distance of 750 meters, the disk performs a suflicient rotation to cause an of maintained against rotation by their springs and will represent by their ends projecting above the dial a speed diagram for the 750 m.. lastvtravelled by the vehicle, as shown in Fig. 7
With reference to the embodiment shown in Figs. 9-13, the numeral 200 indicates the casing of the a paratus which is covered at its front by a isk of'glass 201. Rotatably mounted in the casing 200 isa shaft 202 adapted to bedriven from any of the wheels of the-vehicle or from a member rotating synchronously therewith. The
shaft 202 carries by meansv of' angularly the levers to move from thenarrow en of the guide-wa 107 and back to the wider end of the gui e-wa Duringsaid part of the revolution t e respective levers areprojecting pins 203 an obliquely mounted 3 governor weight 204 connected by a link 205 to a sleeve 207 slidably mounted on an extension 206 of the shaft 202. This sleeve 207 is pivotallg connected at itsupper end to a channel-s aped guide-way 209 pivoted at 208 the side-walls of which converge in the direction away from the pivot 208 towards the connection with sleeve 207. The shaft 202 is shaped as an endless screw as shown at 210 engaged by a worm wheel 211 on an intermediate shaft 212.. The shaft 212 carries also a toothed pinion 213 in engagement with an internally toothed rim 214 formed on a disk 215 rotatably mounted on a tubular journal 216 within the casing 200. Pivotally mounted on the disk 215 are a number of radially swinging levers 217 forming together an annular series of levers. The longer arm of each of said levers engages a radial slot 218 formed in a dial 250 attached to the disk 215. Said dial is pro- 'vided with concentric scores 219 correspond ing to different speeds. The rear ends of the levers 217 are adapted upon the rota tion of the disk 215 to successively engage the guide-way 209 to be thereby set into positions corresponding to the speed of the vehicle at the moments at which the shorter. arms of the levers are disengaged from. the narrow end of the guide-way 209. To maintain the levers 217 in theirset ositions a spring 220 is provided individua to each lever, said springs engaging a surface 221 of the respective levers concentric to the journal of the levers. The's rings areheld out of engagement with t eir respective surfaces 221 by a stationary guiding surface or cam 222 during the pa e ofthe respective levers through the guide-way 209 in order to enable the setting of the levers to take place without exerting any perceptible resistance against the movement of the' governor. In order that the'deflection of the governor may bear a directly proportional relation to the speed variations of the vehicle a spring 223'is provided, perferably acting on the guide-way 209, one end of which is fixed, while the other end is connected to a ta laced over a cam disk 224 carried by t e ub of .the guide-we In order to obtain in additiomto the indication of the momentary (1 during a certain, preferably, short-distance, as represented by the levers 217, an indication of the maximum speed or any other predetermined sipeed during one or more, preferably, longer istances the following provisions are made.
' S'ucha'number wheel is also, shown in Fig.
11. Mounted at the side of said meter is a shaft 226, pivoted at its one end on the journal 227 (Fig. 10) and resting with its opposite end in a slot 228 formed in a. bracket 229 in the direction of swinging of the said shaft. Rotatably mounted on the shaft 226 is a toothed segment 230, adapted to mesh in a toothed rim 231 on the disk 215. The shaft 226 carries further two rotatably mounted number wheel segments 232and 233, see also Figs. 12 and 13. The hubs of the segments 230 and 232 are provided with cooperating clutch members 234 arranged to permit a certain play at the throwingin of the clutch as will appear at 235 in Fig. 10. The lower face of the segment 232 is engaged by a curved arih-236 mounted on the shaft 237 and formed integral with an arm 238 the free end of which extends into the path of a collar or shoulder 239 on the sleeve 207. A spring 240 (Fig. 10) tends to maintain the hub of the segment 232 in engagement with the arm 236. The segment 232, Fig. 12, is
formed with a holding tooth 241 adapted to be engaged by a pawl 242 andis further provided with a stepping tooth 243 and a stop tooth 244 of which the latter is adapted to engage, a fixed stop pin 245. The segment 233, Fig. 13, is formed with-a holding tooth 246 to be engaged by a spring operated pawl 247 and carries further a stepping pawl 248 adapted to engage the tooth 243 (Fig. 12) and a stop shoulder 249 adapted to engage the stop pin 245 A spring 256 tends to move the segment .232 towards the stop pin 245, and another spring 251 tends to move the segment 233 towards the said stop pin 245.
The segments 232 and 233 carry each a number indicating a predetermined speed above the maximum speed allowed. Said numbers will appear through apertures 252 and 253 formed in the front wall of the casing 200. t
The pawls 242 and 247 cooperating with the segments 232 and 233, respectively, are formed with rear extensions 254 and 255, respectively, adapted to enga c any appropriate wheel of the meter 0 the distance recorder, as, for instance, the wheel indicating the kilometres, in such a way that said wheel at each revolution will first release the .pawl 247 and thereupon the pawl 242 or successively.
The detailed operation of the apparatus is as follows:
As long as the speed of the vehicle does not exceed the maximum speed allowed the arm 238 will be out of the path of the collar 239. The arm 236 will now hold the shaft 226 in moved position thereby keeping the segment 230 disengaged from the toothed rim 231. The apparatusis now in the position shown inw ich the rotation ofthe disk 215 has no influence on the apparatus. Both the segment 232 and the segment 233 show into the toothed rim 231.
until after a certain rotation has been 'com-' pleted, as, forinstance, after a rotation corresponding to 50 meters travelledby the vehicle. When the'clutch 234 is thereupon thrown into action the segment 232 is also caused to partake in the rotation which may, for'instance, take. place in the direction indi cated by the arrow shown on the wheel 230- in Fig. 11. After the segment 230 has been rotated to the utmost extent allowedby its teeth, the segment 232 is rotated to such an extent as to permit the pawl 242 to move behind the tooth 241 thereby locking the segment 232.- Should the speed be reduced below the maximum speed allowed the collar 239 will allow restoration of the arm 238 under the action of a spring causing the arm 236 to move the shaft 226 so as to disengage the toothed segment from the toothed rim..231. The pawl 242, however, will retain thesegment 232 in its set position in which it indicates that'the maximum speedsal lo'wed has been exceeded. This position is maintained during the period of time during which the digit wheel 225 which controls the pawl 254-is moving between two transfer operations to the. hi her digit wheel succeedin the wheel 225. hould the said first-mentloned wheel, as assumed above, be the ten kilometre wheel, the segment 232 will indicate, that a speed above the highest speed allowed .has been reached during the ten kilometres last, travelled. When the said digit wheel .which controls the pawl 254,
reaches the position inwhich itis adapted a to mere the next number wheel of the higher order of the distance meter to efiect the transfer operation, a cam or other projection (not shown) on said wheel will'act on the pawl 242-to'cause the latter torelease'the segment 232 which is now rotated by its 'spring256, untilthe tooth 244 strikes the stop 245. In this rotation the pawl 248 mounted on the segment 233 is caused also to rotate owing to its engagement by the stepping tooth 243. This causes also a rotation of the segment 233, and at the end of said-rotation the pawl 247 will engage behind the tooth 246and maintain the segment 233 in set position. The segment 233,v I when "in this position, shows through the aperture 253' that'the maximum speed allowed has been exceeded during a distance which comprises in the'case assumed the ten kilometres travelled by the vehicle next be- 7 fore the distance indicatedf'b the kilometre wheel. If the speed allowed exceeded be fore the kilometre wheel has completed a further revolution, a new setting of the seg- 'ment 232 is effected so that both the segment 1. not allowed, that is, the vehicle has reached 232 and the segment 233 will show a spec toohigh speed both during the distance indicated by the kilometre ,wheel and during the ten kilometres preceding said distance. It is thus clear that the apparatus may in this way always permit a supervision of the completed, inasmuch as thejindication of,
the segment 232 should be transferred. tothe should berestored to normal position. In
segment 233, 'whereas the segment 232 .9
such case the pawls 254 and 255 are in such 7 a position as to cause the wheel 225, when performing the transfer operation, to first I operate the pawl 255 causing it to release the.
segment 233 which is thereupon restored to normal due to the action of its spring. The wheel 225 will then operate the pawl 254 causing it to release the segment 232 to allow it to be restored to normal. In this movement the segment 233 is also moved as before to be thereby again moved to indicating position.
If no speed above the maximum speed al-- lowed has been attained during the ten kilo- .metres last travelled, such a .speed, however,
having been attained during the ten kilometres succeeding those last travelled 'so that in affecting transfer from the wheel 225 only-segment 233 but not segment 232 is in set position, it is evident, that the seg ment 233 is restored to normal and is main-f tained there, as no restoration of the segment 232'is taking place.
It'should be noted that the segments 232 and 233- may be made dependent on any 7 number wheel desired of thedistance meter or on any gearing driven from one ofthe shafts of the vehicle. It'should further be noted that the detailed construction of the invention may diifervfrom that shown in the drawings without departing from the principle of the invention.
While in the embodimentlast -described two indicating devices operating insuccession,as represented by the segments of num-' ber wheels'232 and 233, are shown it should be observed that the number of such devices.
may be varied according to the requirements to allow an indication to be maintained during any desired number of successively travelled distances. The connection between the various segments of number wheels may in such case be arranged in a way similar to that described in connection with the segments 232 and 233.
What I claim is:
1. In a speed indicator operated by a centrifugal governor driven by a. wheel of a vehicle, a rotary member driven from said wheel, a plurality of radially movable indicating members on said rotary member, and connections between said centrifugal governor and said indicating members designed so as to successively adjust said indicating means under the control of the governor in agreement with the momentary speed of the vehicle the indicating members being arranged so as to indicate, when adjusted, the speed of the vehicle duringa certain distance last travelled'by the vehicle.
2. In a speed indicator operated by a centrifugal governor driven b a wheel of a vehicle, a rotary disk drlven from said wheel, an annular series of indicating levers mounted in said disk so as to be able to swing radially therein, means under the control of said centrifugal governor to successively engage the levers of said series to set each lever into a position corresponding to the speed'of the vehicle at the moment at which the lever is set, and a dial on which the levers, when adjusted, indicate the speed of the vehicle during a certain distance last travelled by the vehicle.
3. In a speed indicator operated by'a centrifugal governor driven by a wheel of a vehicle, a rotary disk driven from said wheel, an annular series of indicating levers pivotally mounted on said rotary disk, a channelshaped guide-wa under the control of said governor adapte to be successively engaged by one endsof said levers, and a dial on [which the other ends of the levers after the engagement of the levers with said ideway lndicate the speed of the vehicle uring a certain distance last travelled by the ve hicle.
4. In a speed indicator operated by a centrifugal governor driven b a wheel of a vehicle, a rotary disk driven from said wheel, an annular series of indicating levers mounted in said disk so as to'be able. to
swing radially therein, means under the control of said centrifugal governor to successively engage the lovers of said series to set each lever into a position corresponding .to'
. vehicle, a rotary disk driven from said wheel the vehicle during a certain distance last travelled by the vehicle.
5. In a speed indicator 0 rated by a centrifugal governor driven E; a wheel of a vehicle, a rotary disk driven from said wheel, an annular series of indicating levers pivotally mounted on said rotary disk, a
of the levers into the'said guide-way, and a dial on which the other ends of the levers after the engagement of the levers with said guide-way indicate the speed of the vehicle durin a certain distance last travelled by the ve icle.
6. In a speed indicator operated by a centrifugal governor driven by a wheelof a a an annular series of lndlcating levers mounted in said disk so as to be able to swing radially therein, means under the control of said centrifugal governor to successively engage the levers of said series to set each lever into a position correspondingto the speed of the vehicle at the moment at which the lever is set, and a dial on which the levers .When in set positions indicate the speed of the vehicle during a certain distance last travelled by the vehicle, said dial having radial slots each engaged by one of said levers to form a guide-way therefor.
7. In a speed indicator. operated by a cenloo trifugal governor driven by a wheel of a vehicle, means under the control of the governor to indicate the momentary speed of the vehicle, an indicating mechanism, means controlled by the governor to operate saidm'echanism when a certain speed i of the vehicle is exceeded, means driven by the vehicle to restore said mechanism to normal at each time that the vehicle has travelled a certain distance,a second indicating mechanism adapted to be operated by the said first-mentioned mechanism at the restoration thereof, and means driven from the vehicle to restore said second mechanism after the vehicle has travelled a certain distance.
8. In a speed indicator vehicle, means controlled by the governor to indicate the momentary eipeed of the vehicle, a number wheel 0 erat under the control operated by a. centrifugal governor driven by a wheel of a of the governor w en the vehicle exceeds a certain speed, automatically operating means to lock said number wheel in 0 rated ition, and means driven from t e vehic e to release said locking means after the vehicle has travelled a certain distance.
9. In a speed indicator'operated by a centrifugaligovernor driven-by a wheel of a vehicle, means under the control of the governor to indicate the momentary speed, of the vehicle, a series of number wheels, one of which is operated by the governor, when a certain speed of the vehicle is exceeded, means on each preceding number wheel to operate, as the number wheel is restored, the subsequent number wheel, means to lock each operated number wheel in setposition, and means driven from the vehicle to release said locking means to allow the number wheel to restore to normal.
' 10. In a speed indicator'operated by a centrifugal governor driven by a wheel of a vehicle, means under the control of said governor to indicate the momentary speed of the vehicle, an indicating mechanism, connections between said governor and said mechanism to operate said mechanism under the control of the governor when the vehicle exceeds a' certain speed, said means being arranged to operateWith a certainv play corresponding to a certain distance-travelled by the vehicle, and means to restore said mechanism to normal after the vehicle has travelled a certain distance.
In testimony whereof I have signed my I name;