CA1059091A - Temper-proof vehicle hub odometer - Google Patents
Temper-proof vehicle hub odometerInfo
- Publication number
- CA1059091A CA1059091A CA267,458A CA267458A CA1059091A CA 1059091 A CA1059091 A CA 1059091A CA 267458 A CA267458 A CA 267458A CA 1059091 A CA1059091 A CA 1059091A
- Authority
- CA
- Canada
- Prior art keywords
- axle
- rider
- groove
- wheels
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Distances Traversed On The Ground (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Mechanical Operated Clutches (AREA)
- Electromechanical Clocks (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A device for distance measuring and recording of the type secured to a vehicle wheel hub having a plurality of digit wheels whose digits are disposed to face a slot for receiving a punch card for printing the instant value as recorded. The digit wheels are each driven by a pinion, the pinions being rotatable about a common axis. In order to prevent tampering with the device by a tool inserted in the card slot to turn the digit wheels to a false figure, at least one end of the axis of the pinions is mounted in resilient fashion such that on exceeding a predet-ermined pressure in radial direction at least some pinions become disengaged from the respective digit wheels thus releasing the digit wheels to become randomly arranged whereby subsequent punching of the card results in an out-of-line print showing that the device had been tampered with.
A device for distance measuring and recording of the type secured to a vehicle wheel hub having a plurality of digit wheels whose digits are disposed to face a slot for receiving a punch card for printing the instant value as recorded. The digit wheels are each driven by a pinion, the pinions being rotatable about a common axis. In order to prevent tampering with the device by a tool inserted in the card slot to turn the digit wheels to a false figure, at least one end of the axis of the pinions is mounted in resilient fashion such that on exceeding a predet-ermined pressure in radial direction at least some pinions become disengaged from the respective digit wheels thus releasing the digit wheels to become randomly arranged whereby subsequent punching of the card results in an out-of-line print showing that the device had been tampered with.
Description
`- lOS9091 .
The present invention relates to a deyice attached to a vehicle hub for recording the distance covered by the vehicle, which device comprises a counting mechanism, a printing mechanism for stamp cards and feed means fo~r advancing the counting mechanism wheels as a function of said distance, drive means for said feed means in the form of an annular pendulum concentric with the vehicle wheel axle and provided with mechanic coupling means, in the form of worm gears and screws on the pendulum axle, to the feed means for the counting mechanism wheels. A device of the above type is disclosed in our copending Canadian patent application number 240,650. In such device, the feed means for stepped feed of the counting mechanism wheels comprises a feed arm adapted in response to the rotation of the worm gear to perform in a arbitrary direction of rotation a rocking motion between two stable end positions by action of a snap spring. Said end positions are assumed by turning the feed arm by degrees to the dead point of the snap spring whereafter the snap spring completes said rocking motion to the stable end position.
The counting mechanism wheels are provided with elevated numeral types for printing on the stamp cards. It was now found that in the above prior art device it i8 possible to insert a thin, suitably bent metal sheet into the card slot and by pressing it against an elevated numeral type to press back the type. The counting mechanism, thus, can be so manipulated as to show a distance which is shorter than the real distance covered by the vehicle.
The present invention has the object to render such tampering with device of the aforedescribed kind impossible.
The feed means of the device comprise for each pair of numeral type wheels a transfer pinion rotary on a drive axle in parallel with the counting wheel axle, which pinions are arranged between and mesh with wheels in the pair in question in order to advance the numeral type wheel with higher significance in the pair one countiny step for each revolution of the numeral type wheel with lower significance. The invention is substantially characterized thereby that the 'drive axle at its end located on the same side as the most significant numeral type whe'el of the counting mechanism is held by mea'ns of a resiliént holding member, which is adapted upon actuation of said axle by at least a radial force exceeding a definite size to yieid and release said end,iwhich then performs such a pivotal motion, with the other end of the axle as pivot point, that the meshing between at least the most siignificant ~umeral type wheels and corresponding transfer pinions is interrupted. The numeral type wheels then perform a stamp print consisting of disordered integer, half and smaller parts of digits whereby the improper meddling is easily re~ealed.
At a device according to the invention, comprising a usual axle locking engaging with a groove in the drive axle at one end thereof, which is inserted into a normal hole in the frame of the device in order to radially and axially hold said end, said resilient member can be a groove rider engaging with a second groove at the other end of the drive axle, which end is inserted into an oblong hole in the frame of the device. The oblong hole can be formed of two circular hol~ portions, which partially overlap one another and o~ which the first one hais a diameter adjusted to that of the drive axle in order without clearance to receive said axle end, while the second hole portion has a substantially greater diameter in order after the release of the resilient member to receive wi~h great clearance said end. The groove rider further can be a sheet metal'rider provided w;th recesses, each leg Or the rider having at an intermediate portion Or its inner edge an arc-shapèd portion, in such a manner, that the shape and mutual distance Or these two portions are adapted to receive and retain the corresponding axle end to prevent its axial and radial movement. The rider, on it~
The present invention relates to a deyice attached to a vehicle hub for recording the distance covered by the vehicle, which device comprises a counting mechanism, a printing mechanism for stamp cards and feed means fo~r advancing the counting mechanism wheels as a function of said distance, drive means for said feed means in the form of an annular pendulum concentric with the vehicle wheel axle and provided with mechanic coupling means, in the form of worm gears and screws on the pendulum axle, to the feed means for the counting mechanism wheels. A device of the above type is disclosed in our copending Canadian patent application number 240,650. In such device, the feed means for stepped feed of the counting mechanism wheels comprises a feed arm adapted in response to the rotation of the worm gear to perform in a arbitrary direction of rotation a rocking motion between two stable end positions by action of a snap spring. Said end positions are assumed by turning the feed arm by degrees to the dead point of the snap spring whereafter the snap spring completes said rocking motion to the stable end position.
The counting mechanism wheels are provided with elevated numeral types for printing on the stamp cards. It was now found that in the above prior art device it i8 possible to insert a thin, suitably bent metal sheet into the card slot and by pressing it against an elevated numeral type to press back the type. The counting mechanism, thus, can be so manipulated as to show a distance which is shorter than the real distance covered by the vehicle.
The present invention has the object to render such tampering with device of the aforedescribed kind impossible.
The feed means of the device comprise for each pair of numeral type wheels a transfer pinion rotary on a drive axle in parallel with the counting wheel axle, which pinions are arranged between and mesh with wheels in the pair in question in order to advance the numeral type wheel with higher significance in the pair one countiny step for each revolution of the numeral type wheel with lower significance. The invention is substantially characterized thereby that the 'drive axle at its end located on the same side as the most significant numeral type whe'el of the counting mechanism is held by mea'ns of a resiliént holding member, which is adapted upon actuation of said axle by at least a radial force exceeding a definite size to yieid and release said end,iwhich then performs such a pivotal motion, with the other end of the axle as pivot point, that the meshing between at least the most siignificant ~umeral type wheels and corresponding transfer pinions is interrupted. The numeral type wheels then perform a stamp print consisting of disordered integer, half and smaller parts of digits whereby the improper meddling is easily re~ealed.
At a device according to the invention, comprising a usual axle locking engaging with a groove in the drive axle at one end thereof, which is inserted into a normal hole in the frame of the device in order to radially and axially hold said end, said resilient member can be a groove rider engaging with a second groove at the other end of the drive axle, which end is inserted into an oblong hole in the frame of the device. The oblong hole can be formed of two circular hol~ portions, which partially overlap one another and o~ which the first one hais a diameter adjusted to that of the drive axle in order without clearance to receive said axle end, while the second hole portion has a substantially greater diameter in order after the release of the resilient member to receive wi~h great clearance said end. The groove rider further can be a sheet metal'rider provided w;th recesses, each leg Or the rider having at an intermediate portion Or its inner edge an arc-shapèd portion, in such a manner, that the shape and mutual distance Or these two portions are adapted to receive and retain the corresponding axle end to prevent its axial and radial movement. The rider, on it~
- 2 -edge opposed to the recess opening, has an upward bent portion adapted to engage with a groove in the frame of the device, and the elastic properties and dimensions Or ~he rider as well as the dimensions Or the axle grbove are such that upon action on the axle by a radial or axial force exceeding a definite value the axle end gets out Or the engagement with the rider and assumes a radially and axially undefined position in the oblong hole.
The invention is described in greater detail with reference to an embodiment shown in the accompanying drawings, in which Figs. 1 and 2 show the reed mechanism for the numeral type wheels at a device according to the invention, Fig. 2 referring to the section V-V in Fig. 1, Fig. 3A ;shows details Or the feed means seen from above, Figs. 3B
and 3C show the sections Y-Y and, respectively, X-X in Fig. 3A, Figs. 4A
and 4B are two views Or perpendicular relationship Or a groove rider at the device according to the invent- i ion, Fig. 5 shows on an enlarged scale the axle hole ror one end Or the drive axle carrying the drive wheels ror the numeral type wheels, and Fig. 6 shows said lastmentioned axle.
To begin with9 the reed mechanism for the numeral type wheels Or the counting mechanism is described with reference to Figs. 1 and Z.
The first part Or the transfer system ror transferring the contin-uous movement Or the worm gear 10 to the numeral wheels 19 consists Or a crank mechanism. The axle 42 carrying t~e worm gear 10 is provided at its opposite end with a plate 28 provided with a crank ~ 1059091 pin 29. Said pin actuates a supported crank arm 30 via a groove 31.
The crank arm will reciprocatingly rock between its end positions, independently of the rotation direction of the worm gear 10. The crank arm i8 provided at its end opposite to the groove 31 with -outward bent dog tips 32, which actuate a feed arm 33 through a stop member 34 riveted on the arm. The feed arm 33 is supporteq on an axle 35 and can swing between two end positions, which are determined by the contour Or the feed arm 33 and by a stop pin 36.
On said feed arm 33 further are attached a feed spring 37 and a spring support 38. The feed spring 37 actuates a ratchet wheeI 53 mounted to the side of the first numeral type wheel i9 and rotary on the counting wheel axle 54.
The reed arm also i8 actuated via the spring support 38 by a snap spring 39, which at its other end issuspended in a support 40. The feed arm 33 can assume two stable positions, viz. a first dash-dotted position with a contour arm 33A a~ainst the stop pin 36, in whioh position the snap spring 39 is tensioned and the reed spring 37 is ready to advance a tooth 41 on the ratchet wheel 53 adjacent the first numeral wheel 19, and a second position with a contour arm 33B restin~ against the stop pin 36. In this second position, the snap spring 39 i8 relieved and the tooth 41 has been advanced one position, By a suitably desi~ned clearance between the dog tips 32 and the stop member 34 (Fig. 2) a rorced reed Or the reed arm between the t~o end positions as determined by the stop pin 36 and the contour arms 33A and 33B is obtained. This forced feed is not utilized at normal operation, because the snap spring causes the feed arm be slowly lifted up to the dead position whereafter it snaps over to )S9091 .
the stable end positions If ror some reason the snap movement is obstructed, ror example due to dust or dirt penetrated. inJ to increased rriction or to means introduced improperly in order to brake ~he wheels, the numeral wheels yet will be advanced by force and, thus, the counting Or the distance covered will continue. .¦
'.
Ir the numeral wheels are braked to a definite stop, the feed spring 37 will be overloaded and permanently deformed, so that rurther advancement Or the numeral wheels will not ta~e place, not even.after the removal Or the stop. .
The printing on the stamp card is effected rrom the numeral wheels ~9 through an aperture 64 in one wall 63 Or the card ~lot 4 and, respectively, from the numeral type wheels l9A, which are fixedly set and together form the apparatus number of the device, through an aperture 64A.
As appears most clearly from Figs. 3A and 3B, the distance counting mechanism comprises numeral type wheels 19, which are rotary on the axle 54. Transrer pinions 62 rotary on an axle 55 are arranged between the ratchet wheel 53 and the r.irst numeral type wheel A
and in continuation between each pair Or numeral type wheels A-B, B-C, C-D, D-E and E-F. The types 57 on the numeral type wheeis are elevated and intended at printing to act through the aperture 64 (Fig. 3B) on a stamp card inserted into the card slot 4. The numeral wheel axle 54 has a pretty large diameter in order to bring about a neat 3tamp image. The friction moment is then relatively high, but in return the drive axle 55 has a small diameter, so that the rriction moments are held down. Each transfer pinion 62 com-prises a h~b 65, a first tooth series 66 Or rive teeth 68 associ-ated with said hub, and a second tooth series 67 Or ten teeth 69 lossos~
a~_ociated with the tooth series 66. The teeth 68 co-operate with a projection, which is provided with a recess and located on the circumrerence Or the portion 70 Or the ratchet wheel 53.and, res-pectively, Or the numeral wheels, so that each pinion 62 is turned by jerks once ror each revolution Or the next lower significant numeral type wheel and, respectively, ratchet wheel ~or successive decade transfer upward in the counting mechanism. The drive by steps takès place by meshing Or the t~`oth series 67 with the tooth series 71 of the numeral type wheels. The numeral type wheels are graduated 0-9, and in Fig. 3A the number 765422 is shown in posi-tion ror printing. As indicated above, the wheels 19 in Fig. 3A
have the designations A, B, C, D, E and F, respectively, and show I I
the maximum values 9, 99, 999, 9999, 99999 and 999999 Km, respect- ¦
ively. .
In Fig. 3B isshown how a person intending to improperly change the number indication Or the counting mechanism probably would proceed ¦
By means Or a suitably bent metal sheet 56 inserted into the card slot 4 against an elevated numeral 57 this numeral can by force be pressed back so that a lower number indication is obtained. In practice it i'8 Or minor importance to manipulate with the wheels A, B, C which rerer to low numbers Or kilometers. The wheels D~ E
and F, however, are Or great interest and, thererore, their mani- ¦
pulation i~ worthwhile some bother.
.
In Fig. 3B two lines are shown intersecting one another in the centre ror the drive axle 55, Or which lines one extends through the point~or engagement Or the metal sheet 56 with the numeral type 57, and the other line extends through the centre Or the axle 54. These lines rorm between themselves à small angle L, and the lastmentioned line shows the direction for the rorce P, which acts on the drive axle 55 and will be relatively great when a relatively moderate force i8 applied on the metal sheet 56.
lOS9091 In order to prevent this possibility Or manipulation with the numeral type wheels, according to the invention the arrangement is made that the drive axle 55 by action Or the ~orce P springs outward, i.e. its upper end 74 in Fig, 3A swings out~ard to the left, with the lower end 72 as centre Or rotation, whereby over-meshing takçs place or, with other words, the tooth series 71 on -the wheels 19 get out Or engagement with the pinions 62. This implies that the wheels 19 not longer are lockedby the pinions 62 andj thus, are rree to perform an uncontrolled movement and there-by will assume uncontrollable positions.
!
This is signified at the printing in such a way, that certain numerals are printed only partially, whereby the manipulation is directly revealed. The arrangement further æhould be such that the counting mechanism can be restored to serviceable state only by renovation in the factory.
The said possibility for the axle 55 to spring outward, more pre-cisely, i8 brought about as rollows. The axle 55 is provided close to its two ends with an annular groove 61 (Fig. 6). The axle end 72 (Fig. 3A) carries in the groove 61 a normal axle locking 59 abutting the side wall 73 o~ the rrame and is inserted into a normal hole in said wall. At the other axle end 74 a special groove rider 58 (Figs. 4A and 4~) is mounted in the groove 61 and rests against the inner surface Or the side wall 75. Said rider 58 has one end bent upward at 76 (Fig. 4A), which end i8 inserted into a groove 77 (Fig. 3C) in the wall 75. As can be seen in Fig. 4~, the rider 58 i8 provided with a recess 78 Or special shape, which has a portion 79 adapted to fit against the bottom Or the groove 61 in the axle 55. The longitudinal symmetry line Or the recess 78 extend~ in the ro11ing direction ror the rider sheet metal blank.
The hole 60 ror the axle 55 in the side wall 75 has a special lOS909~ 1 ~ ~pe, as shown in Fig. 5. It consists Or a portion 80A with a diameter adjuRted to the diameter of the axle 55, and connected thereto a portion 80B with a substantially greater diameter. The shape of the hole 60 is substantially similar to a keyhole, and its outline corresponds substantially to the outer contour Or the numeral 8, in such a manner, that one loop Or the numeral is sub- ¦
stantially greater, and the loops so to say are pressed one into the other. The normal position Or the axle end 74, rider 58 and~
hole 60 i8 shown in Fig. 3C. The end 74 then is located clamped by the rider 58 in the smaller portion 80A o~ the hole 60.
. '. . ' When one presses with the metal sheet 56 against the type 57, as~
shown in Fig. 3B, the rorce Or engagement Or the rider 58 with the axle 55 is overcome by the relatively great rorce P, so that the axle end 74 will snap out Or the rider 58 and thereby be moved into the greater portion 80B Or the hole 60. Thereby at least the wheels D, E, P are disengaged rrom the corresponding pinions 62, as described above, and the improper meddling is inexorably re- j vealed.
The locking rorce Or the groove rider 58 against the axle 55, Or course, is so adjusted that the axle 55 cannot snap outward at such impact~ and shock8 a8 can be ima~ined to occur at normal use Or the distance measuring device. Upon mounting, the axle 55 is inserted into the hole 78, in which connection the groove rider 58 i8 not subjected to any derorming rorces. The groove rider, rurther, is so designed that a relatively small radial movement Or the axle 55 causes the axle to snap out Or engagement with the groove rider. Said latter has such a rigidness that a small out-ward bending Or the rider legs is required for snapping out while, however~ the desired locking rorce at normal operation Or the measuring instrument is maintained.
The device shown can be modiried in dir~erent ways within the scope Or the claims.
The invention is described in greater detail with reference to an embodiment shown in the accompanying drawings, in which Figs. 1 and 2 show the reed mechanism for the numeral type wheels at a device according to the invention, Fig. 2 referring to the section V-V in Fig. 1, Fig. 3A ;shows details Or the feed means seen from above, Figs. 3B
and 3C show the sections Y-Y and, respectively, X-X in Fig. 3A, Figs. 4A
and 4B are two views Or perpendicular relationship Or a groove rider at the device according to the invent- i ion, Fig. 5 shows on an enlarged scale the axle hole ror one end Or the drive axle carrying the drive wheels ror the numeral type wheels, and Fig. 6 shows said lastmentioned axle.
To begin with9 the reed mechanism for the numeral type wheels Or the counting mechanism is described with reference to Figs. 1 and Z.
The first part Or the transfer system ror transferring the contin-uous movement Or the worm gear 10 to the numeral wheels 19 consists Or a crank mechanism. The axle 42 carrying t~e worm gear 10 is provided at its opposite end with a plate 28 provided with a crank ~ 1059091 pin 29. Said pin actuates a supported crank arm 30 via a groove 31.
The crank arm will reciprocatingly rock between its end positions, independently of the rotation direction of the worm gear 10. The crank arm i8 provided at its end opposite to the groove 31 with -outward bent dog tips 32, which actuate a feed arm 33 through a stop member 34 riveted on the arm. The feed arm 33 is supporteq on an axle 35 and can swing between two end positions, which are determined by the contour Or the feed arm 33 and by a stop pin 36.
On said feed arm 33 further are attached a feed spring 37 and a spring support 38. The feed spring 37 actuates a ratchet wheeI 53 mounted to the side of the first numeral type wheel i9 and rotary on the counting wheel axle 54.
The reed arm also i8 actuated via the spring support 38 by a snap spring 39, which at its other end issuspended in a support 40. The feed arm 33 can assume two stable positions, viz. a first dash-dotted position with a contour arm 33A a~ainst the stop pin 36, in whioh position the snap spring 39 is tensioned and the reed spring 37 is ready to advance a tooth 41 on the ratchet wheel 53 adjacent the first numeral wheel 19, and a second position with a contour arm 33B restin~ against the stop pin 36. In this second position, the snap spring 39 i8 relieved and the tooth 41 has been advanced one position, By a suitably desi~ned clearance between the dog tips 32 and the stop member 34 (Fig. 2) a rorced reed Or the reed arm between the t~o end positions as determined by the stop pin 36 and the contour arms 33A and 33B is obtained. This forced feed is not utilized at normal operation, because the snap spring causes the feed arm be slowly lifted up to the dead position whereafter it snaps over to )S9091 .
the stable end positions If ror some reason the snap movement is obstructed, ror example due to dust or dirt penetrated. inJ to increased rriction or to means introduced improperly in order to brake ~he wheels, the numeral wheels yet will be advanced by force and, thus, the counting Or the distance covered will continue. .¦
'.
Ir the numeral wheels are braked to a definite stop, the feed spring 37 will be overloaded and permanently deformed, so that rurther advancement Or the numeral wheels will not ta~e place, not even.after the removal Or the stop. .
The printing on the stamp card is effected rrom the numeral wheels ~9 through an aperture 64 in one wall 63 Or the card ~lot 4 and, respectively, from the numeral type wheels l9A, which are fixedly set and together form the apparatus number of the device, through an aperture 64A.
As appears most clearly from Figs. 3A and 3B, the distance counting mechanism comprises numeral type wheels 19, which are rotary on the axle 54. Transrer pinions 62 rotary on an axle 55 are arranged between the ratchet wheel 53 and the r.irst numeral type wheel A
and in continuation between each pair Or numeral type wheels A-B, B-C, C-D, D-E and E-F. The types 57 on the numeral type wheeis are elevated and intended at printing to act through the aperture 64 (Fig. 3B) on a stamp card inserted into the card slot 4. The numeral wheel axle 54 has a pretty large diameter in order to bring about a neat 3tamp image. The friction moment is then relatively high, but in return the drive axle 55 has a small diameter, so that the rriction moments are held down. Each transfer pinion 62 com-prises a h~b 65, a first tooth series 66 Or rive teeth 68 associ-ated with said hub, and a second tooth series 67 Or ten teeth 69 lossos~
a~_ociated with the tooth series 66. The teeth 68 co-operate with a projection, which is provided with a recess and located on the circumrerence Or the portion 70 Or the ratchet wheel 53.and, res-pectively, Or the numeral wheels, so that each pinion 62 is turned by jerks once ror each revolution Or the next lower significant numeral type wheel and, respectively, ratchet wheel ~or successive decade transfer upward in the counting mechanism. The drive by steps takès place by meshing Or the t~`oth series 67 with the tooth series 71 of the numeral type wheels. The numeral type wheels are graduated 0-9, and in Fig. 3A the number 765422 is shown in posi-tion ror printing. As indicated above, the wheels 19 in Fig. 3A
have the designations A, B, C, D, E and F, respectively, and show I I
the maximum values 9, 99, 999, 9999, 99999 and 999999 Km, respect- ¦
ively. .
In Fig. 3B isshown how a person intending to improperly change the number indication Or the counting mechanism probably would proceed ¦
By means Or a suitably bent metal sheet 56 inserted into the card slot 4 against an elevated numeral 57 this numeral can by force be pressed back so that a lower number indication is obtained. In practice it i'8 Or minor importance to manipulate with the wheels A, B, C which rerer to low numbers Or kilometers. The wheels D~ E
and F, however, are Or great interest and, thererore, their mani- ¦
pulation i~ worthwhile some bother.
.
In Fig. 3B two lines are shown intersecting one another in the centre ror the drive axle 55, Or which lines one extends through the point~or engagement Or the metal sheet 56 with the numeral type 57, and the other line extends through the centre Or the axle 54. These lines rorm between themselves à small angle L, and the lastmentioned line shows the direction for the rorce P, which acts on the drive axle 55 and will be relatively great when a relatively moderate force i8 applied on the metal sheet 56.
lOS9091 In order to prevent this possibility Or manipulation with the numeral type wheels, according to the invention the arrangement is made that the drive axle 55 by action Or the ~orce P springs outward, i.e. its upper end 74 in Fig, 3A swings out~ard to the left, with the lower end 72 as centre Or rotation, whereby over-meshing takçs place or, with other words, the tooth series 71 on -the wheels 19 get out Or engagement with the pinions 62. This implies that the wheels 19 not longer are lockedby the pinions 62 andj thus, are rree to perform an uncontrolled movement and there-by will assume uncontrollable positions.
!
This is signified at the printing in such a way, that certain numerals are printed only partially, whereby the manipulation is directly revealed. The arrangement further æhould be such that the counting mechanism can be restored to serviceable state only by renovation in the factory.
The said possibility for the axle 55 to spring outward, more pre-cisely, i8 brought about as rollows. The axle 55 is provided close to its two ends with an annular groove 61 (Fig. 6). The axle end 72 (Fig. 3A) carries in the groove 61 a normal axle locking 59 abutting the side wall 73 o~ the rrame and is inserted into a normal hole in said wall. At the other axle end 74 a special groove rider 58 (Figs. 4A and 4~) is mounted in the groove 61 and rests against the inner surface Or the side wall 75. Said rider 58 has one end bent upward at 76 (Fig. 4A), which end i8 inserted into a groove 77 (Fig. 3C) in the wall 75. As can be seen in Fig. 4~, the rider 58 i8 provided with a recess 78 Or special shape, which has a portion 79 adapted to fit against the bottom Or the groove 61 in the axle 55. The longitudinal symmetry line Or the recess 78 extend~ in the ro11ing direction ror the rider sheet metal blank.
The hole 60 ror the axle 55 in the side wall 75 has a special lOS909~ 1 ~ ~pe, as shown in Fig. 5. It consists Or a portion 80A with a diameter adjuRted to the diameter of the axle 55, and connected thereto a portion 80B with a substantially greater diameter. The shape of the hole 60 is substantially similar to a keyhole, and its outline corresponds substantially to the outer contour Or the numeral 8, in such a manner, that one loop Or the numeral is sub- ¦
stantially greater, and the loops so to say are pressed one into the other. The normal position Or the axle end 74, rider 58 and~
hole 60 i8 shown in Fig. 3C. The end 74 then is located clamped by the rider 58 in the smaller portion 80A o~ the hole 60.
. '. . ' When one presses with the metal sheet 56 against the type 57, as~
shown in Fig. 3B, the rorce Or engagement Or the rider 58 with the axle 55 is overcome by the relatively great rorce P, so that the axle end 74 will snap out Or the rider 58 and thereby be moved into the greater portion 80B Or the hole 60. Thereby at least the wheels D, E, P are disengaged rrom the corresponding pinions 62, as described above, and the improper meddling is inexorably re- j vealed.
The locking rorce Or the groove rider 58 against the axle 55, Or course, is so adjusted that the axle 55 cannot snap outward at such impact~ and shock8 a8 can be ima~ined to occur at normal use Or the distance measuring device. Upon mounting, the axle 55 is inserted into the hole 78, in which connection the groove rider 58 i8 not subjected to any derorming rorces. The groove rider, rurther, is so designed that a relatively small radial movement Or the axle 55 causes the axle to snap out Or engagement with the groove rider. Said latter has such a rigidness that a small out-ward bending Or the rider legs is required for snapping out while, however~ the desired locking rorce at normal operation Or the measuring instrument is maintained.
The device shown can be modiried in dir~erent ways within the scope Or the claims.
Claims (5)
1. A recording distance measuring instrument arranged for attachment to a vehicle hub, said instrument comprising a counting mechanism, a printing mechanism for stamp cards and feed means for advancing the counting mechanism wheels as a function of the distance, drive means for said feed means in the form of an annular pendulum concentric with the vehicle hub and provided with mechanical coupling means, in the form of worm gears and screws on the pendulum axle, to said feed means for the counting mechanism wheels, said feed means for stepped counting mechanism wheel advancement comprising a feed arm adapted in response to the rotation of the worm gear in an arbitrary rotation direction to perform a rocking motion between two stable end positions by action of a snap spring, which end positions are assumed by turning the feed arm by degrees to the dead point of the snap spring, whereafter the snap spring completes said rocking motion to the stable end position, and the feed means for each pair of numeral type wheels comprising a transfer pinion, which are rotary on a drive axle in parallel with the counting mechanism wheel axle and located between and meshing with the wheels in the pair in question for advancing the numeral type wheel with higher significance within the pair one counting step for each revolution of the numeral type wheel with lower signif-icance, characterized in that the drive axle at its end located on the same side as the most significant numeral type wheel of the counting mechanism is held by means of a resilient holding member adapted upon actuation of said axle by at least a radial force exceeding a definite size to yield and release said end which then performs such a swing motion, with the other end of the axle as pivot point, that at least the more significant numeral type wheels get out of engagement with corresponding transfer pinions.
2. A device according to claim 1, at which a normal axle locking engages with a groove in the drive axle at one end thereof, which is inserted into a normal hole in the frame of the device for radially and axially locking said end, characterized in that the resilient member is a groove rider engaging with a second groove at the other end of the drive axle, which end is inserted into an oblong hole in the frame of the device.
3. A device according to claim 1 or 2, characterized in that the oblong hole is formed of two circular hole portions partially overlapping one another, of which the first hole portion has a diameter adjusted to the diameter of the drive axle for receiving without clearance said axle end, while the second hole portion has a substantially greater diameter for receiving with great clearance said end after the release of the resilient member.
4. A device according to claim 2 characterized in that the groove rider is a sheet metal rider provided with a recess, each leg of the rider in an intermediate portion of its inner edge showing an arc-shaped portion in such a manner, that the shape and mutual distance of these two portions are adapted to receive and retain the corresponding drive axle end to prevent its axial and radial movement, and said rider is provided on its edge opposite to the recess aperture with an upward bent portion adapted to engage with a groove in the frame of the device, and the elastic properties and dimensions of the rider and the dimensions of the axle groove being such, that upon action on the axle by a radial or axial force exceeding a definite value the axle end gets out of engagement with the rider and assumes a radially and axially undefined position in the oblong hole.
5. A device according to claim 1 or 2, wherein the oblong hole is formed of two circular hole portions partially overlapping one another, of which the first hole portion has a diameter adjusted to the diameter of the drive axle for receiving without clearance said axle end, while the second hole portion has a substantially greater diameter for receiving with great clearance said end after the release of the resilient member, characterized in that the groove rider is a sheet metal rider provided with a recess, each leg of the rider in an intermediate portion of its inner edge showing an arc-shaped portion in such a manner, that the shape and mutual distance of these two portions are adapted to receive and retain the corresponding drive axle end to prevent its axial and radial movement, and said rider is provided on its edge opposite to the recess aperture with an upward bent portion adapted to engage with a groove in the frame of the device, and the elastic properties and dimensions of the rider and the dimensions of the axle groove being such, that upon action on the axle by a radial or axial force exceeding a definite value the axle end gets out of engagement with the rider and assumes a radially and axially undefined position in the oblong hole.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7601903A SE397880B (en) | 1976-02-19 | 1976-02-19 | AT A VEHICLE WHEEL HAVE FIXED DEVICE FOR REGISTRATION OF ONE OF THE VEHICLE, BACKED ROAD DRAW |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1059091A true CA1059091A (en) | 1979-07-24 |
Family
ID=20327044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,458A Expired CA1059091A (en) | 1976-02-19 | 1976-12-08 | Temper-proof vehicle hub odometer |
Country Status (10)
| Country | Link |
|---|---|
| JP (2) | JPS52102075A (en) |
| CA (1) | CA1059091A (en) |
| CH (1) | CH611019A5 (en) |
| DE (1) | DE2649191C3 (en) |
| DK (1) | DK146520C (en) |
| FI (1) | FI60311C (en) |
| FR (1) | FR2341839A2 (en) |
| GB (1) | GB1533058A (en) |
| NO (1) | NO142367C (en) |
| SE (1) | SE397880B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517768U (en) * | 1991-08-13 | 1993-03-05 | 矢崎総業株式会社 | Totalizer |
| CN114543833B (en) * | 2021-10-12 | 2024-04-19 | 湖北金诚信矿业服务有限公司 | Automatic path counting device of underground mining truck |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3880351A (en) * | 1973-05-22 | 1975-04-29 | Peter D Bogart | Digital counters and odometers |
| JPS533002Y2 (en) * | 1973-08-25 | 1978-01-26 | ||
| SE374202B (en) * | 1974-02-27 | 1975-02-24 | Record Taxameter Ab |
-
1976
- 1976-02-19 SE SE7601903A patent/SE397880B/en not_active IP Right Cessation
- 1976-10-26 NO NO763658A patent/NO142367C/en unknown
- 1976-10-26 DK DK483276A patent/DK146520C/en not_active IP Right Cessation
- 1976-10-27 CH CH1355776A patent/CH611019A5/en not_active IP Right Cessation
- 1976-10-28 FI FI763076A patent/FI60311C/en not_active IP Right Cessation
- 1976-10-28 DE DE2649191A patent/DE2649191C3/en not_active Expired
- 1976-11-30 GB GB49793/76A patent/GB1533058A/en not_active Expired
- 1976-12-08 CA CA267,458A patent/CA1059091A/en not_active Expired
- 1976-12-27 JP JP15664776A patent/JPS52102075A/en active Pending
- 1976-12-30 FR FR7639600A patent/FR2341839A2/en active Granted
-
1981
- 1981-09-25 JP JP56152832A patent/JPS5825208B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DK146520B (en) | 1983-10-24 |
| SE397880B (en) | 1977-11-21 |
| AU1954576A (en) | 1977-11-17 |
| NO763658L (en) | 1977-08-22 |
| DE2649191B2 (en) | 1979-05-17 |
| CH611019A5 (en) | 1979-05-15 |
| JPS5794611A (en) | 1982-06-12 |
| FR2341839B2 (en) | 1979-03-09 |
| FI60311B (en) | 1981-08-31 |
| FI763076A (en) | 1977-08-20 |
| FR2341839A2 (en) | 1977-09-16 |
| FI60311C (en) | 1981-12-10 |
| DE2649191A1 (en) | 1977-08-25 |
| GB1533058A (en) | 1978-11-22 |
| NO142367C (en) | 1980-08-13 |
| SE7601903L (en) | 1977-08-20 |
| DE2649191C3 (en) | 1982-04-29 |
| JPS5825208B2 (en) | 1983-05-26 |
| DK483276A (en) | 1977-08-20 |
| DK146520C (en) | 1984-04-02 |
| NO142367B (en) | 1980-04-28 |
| JPS52102075A (en) | 1977-08-26 |
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