US3877303A - Sport speedometer - Google Patents

Sport speedometer Download PDF

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Publication number
US3877303A
US3877303A US339945A US33994573A US3877303A US 3877303 A US3877303 A US 3877303A US 339945 A US339945 A US 339945A US 33994573 A US33994573 A US 33994573A US 3877303 A US3877303 A US 3877303A
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US
United States
Prior art keywords
housing
air
paddle blade
velocity
fastening means
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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 - Lifetime
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US339945A
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English (en)
Inventor
Gerhard Beckmann
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RAUM ITALIA
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RAUM ITALIA
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Publication date
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers

Definitions

  • the speedometer mechanism being dis- [58] Field of Search 73/189, 228, 379, 186; posed in a housing having an air flow entrance and 1 16/129 B, 129 T connected to a fastening device in such a manner that the housing can be pivoted relative to the fastening [56] References Cited device, and automatically retained at the set position, UNITED STATES PATENTS to cause the air flow entrance to face in the direction 925,814 6/1909 Jones 116/129 B l Velocity/S be meiisured regardless 3 040 698 6/1962 Gray u 6/129 R orientation of the ObjfiCt carrying the fastening device.
  • the present invention relates to a sport speedometer operating according to the principle of an air flow speedometer, and of the type including an indicator scale. a paddle blade for deflecting an indicator needle. or pointer, and a fastening device provided with a securing member similar to a watchband.
  • a sport speedometer of the above-mentioned type includes an air guide channel in which the paddle blade is located and the air entrance to the channel is invariably and fixedly disposed opposite the fastening device.
  • the speedometer can thus be used only in certain situations where the fastening device will always have the air entrance aligned in the prescribed orientation.
  • connection between the speedometer housing and the fastening device is such that the opening plane for the air entrance of the housing is approximately perpendicular to the pivot plane between the fastening device and the speedometer housing, the pivot plane being normal to the pivot axis.
  • guide vanes are disposed inside the air entrance opening of the housing to deflect and direct the air flow in the direction toward. and approximately normal to, the surface of the paddle blade. This contributes to an increase in the accuracy of the measurement and prevents turbulences within the speedometer.
  • flutter of the paddle blade is prevented by making the blade slightly convexly curved in a manner such that its convex side faces the air stream.
  • the longitudinal axis of the convex curvature is parallel to the longitudinal axis of the blade.
  • another feature of the invention involves extending the paddle blade past its pivot axis to provide a support for a counterweight.
  • a drag pointer which is controlled by the regular pointer is mounted to pivot about an axis parallel to. and preferably coaxial with the pivot axis of the paddle blade. the paddle blade being itself an instantaneous speed indicator.
  • the drag pointer is mounted to be pushed by the paddle blade in the direction of increasing speeds and to automatically remain. e.g. under the influence of a friction linkage. at the highest speed level attained. The drag pointer thus serves to reliably record the maximum attained speed even if shocks are experienced.
  • the drag pointer has a reset handle extending into the housing so that the drag pointer can be returned to its starting position to again be available to measure a new maximum speed.
  • FIG. 1 is a plan view of a preferred embodiment of the speedometer according to the present invention.
  • FIG. 2 is a side view in the direction of arrow II of FIG. 1.
  • FIG. 3 is a cross-sectional plan view taken along line IIIllI of FIG. 2. i.e. showing the speedometer mechanism with the housing cover removed.
  • FIG. 4 is a cross-sectional view taken along line IVIV of FIG. 3.
  • FIGS. 1 to 4 DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the mechanical parts of the speedometer are disposed in a housing I which is covered by a cover 2.
  • Cover 2 is connected with housing 1 by fastening screws 3.
  • Cover 2 has a viewing window 4 atthe top and a viewing window 5 at the side.
  • Speed scales 6 and 7 connected with housing 1 can be seen from two sides. from the outside. through these viewing windows 4 and 5, respectively.
  • the speed scale 6 can be seen from the top and speed scale 7 can be seen from the side.
  • Cover 2 can also be provided with a wind force scale, as shown in FIG. I.
  • the direction of the incident air flow is shown in FIG. 3 by arrows 8.
  • the air enters the housing I in the area of the housing entrance opening 9. It flows out of housing 1 through the exit opening 10.
  • Guide vanes II to deflect and direct the air flow are disposed in air entrance opening 9. Theresult of this deflection is that air is caused to flow inside the housing in the direction indicated by the flow arrows 12 shown in the vicinity of vanes 11.
  • the air flow within the housing is such that the air is directed in the most favorable manner toward paddle blade 13.
  • This paddle blade 13 is mounted within housing I to be supported by. and rotate about, a bearing pin 14.
  • Paddle blade 13 is extended beyond pivot pin 14 in the direction away from the portion subjected to the air flow, the extension forming a short lever arm 15.
  • One end of a tension spring 16 is connected to lever arm 15, while the other end of spring 16 is fastened to a post 17 which is stationary with respect to housing 1.
  • a counterweight 18 is also connected to blade 13 to increase the inertia of the paddle blade.
  • the paddle blade 13 is designed to be slightly convexly curved, with its convex side facing the air flow. It can also be seen in FIGS. 3 and 4 that sufficiently dimensioned air gaps for the passage of air around the blade are provided at the outer end and along the longitudinal sides of paddle blade 13, the gaps being between the blade and the adjacent surfaces of housing 1 and cover 2.
  • a drag pointer 19 is mounted in housing 1 for rotation about an axis parallel to the axis of rotation of paddle blade 13. In the area of its pivot axis. drag pointer 19 is loaded. or biased, by a rod or leaf spring 20, which is also permanently connected with the housing 1 via post 17. Spring 20 normally retains pointer 19 at the highest speed position reached by blade 13.
  • a reset handle 21 is disposed in cover 2 to be longitudinally displaceable in the direction of arrow 22. It extends into the pivot range of drag pointer 19 and serves to return the drag pointer from its indicating position (FIG. 3) to its starting position.
  • reset handle 21 For return the reset handle 21 is moved upwards in respect of FlGS. 1 and 4. In doing so the inside end of reset handle 21 contacts the lower edge of the drag pointer 19 and pushes it upwards. After return of the drag pointer 19 to its starting position (position of reset handle 21 see FIG. 2) reset handle 21 is released. Then reset handle 21 is moved back automatically by spring 21a into its downward position which is outwards of the pivot range of drag pointer 19.
  • Spring 20 contacts pointer 19 and urges it against a bearing plate being situated between paddle blade 13 and pointer 19 and connected with housing 1.
  • the bearing plate also locates bearing pin 14 of paddle blade 13.
  • housing 1 In the area of its bottom, housing 1 is rotatably connected to a fastening device 23.
  • the rotary connection is effected by a pin 24 in such a manner that the fastening device 23 rests on the bottom of housing 1 over a certain peripheral range of device 23.
  • the fastening device 24 is provided with protruding knurls 25 which bear against the bottom of housing 1 with a given pressure force and assure that the device 23 will be automatically retained in the position in which it has been manually set relative to housing 1.
  • An annular groove may be disposed at the bottom of housing 1 into which the knurls 25 engage to thus produce an increase in the frictional holding force.
  • the fastening device 23 is provided with slits 26 for the passage of a buckle strap 27.
  • the buckle strap 27 cooperates with the fastening device 23 in the manner that awatchband cooperates with a wrist watch. With such arrangement, it is of course possible to position the speedometer at any point around the users wrist.
  • the opening plane of the air entrance is defined by the limiting edges 28 and 29.
  • the paddle blade 13 as well as the drag pointer 19 are provided with pointers at their ends which cooperate with scales 6 and 7, the pointer 13a on blade 13 cooperating with scale 7.
  • an air flow measuring sport speedometer composed of a housing carrying an indicator scale and defining an air guide channel and an air entrance opening via which air moving past an object whose velocity is to be measured passes from the region outside the housing into the channel, and an air velocity indicator including a paddle blade mounted in the housing to extend into the channel and arranged to pivot relative to the housing under the influence of the air flowing through the channel, the improvement comprising: means for fastening the housing to the object whose velocity is to be measured in such a manner that the housing has any desired orientation about a first axis defined by the object; means providing a pivot connection between said fastening means and said housing for permitting said housing to be given any desired orientation relative to said fastening means about a second axis normal to said first axis; retaining means disposed between said fastening means and said housing for automatically retaining said housing in the selected orientation relative to said fastening means, whereby said entrance opening can be placed in the desired orientation relative to the air flow independently of the orientation of said fastening means; and wherein said paddle blade is provided
  • An arrangement as defined in claim 2 further comprising air guide vane means disposed in said air guide channel at said air entrance opening for directing air flowing through said opening toward said paddle blade.
  • an air velocity indicator including a paddle blade mounted in the housing to extend into the channel and arranged to pivot relative to the housing under the influence of the air flowing through the channel, and means for fastening the housing to the object whose velocity is to be measured
  • the improvement comprising: means connected between said fastening means to said housing for permitting the orientation of said housing relative to said fastening means to be selectively varied; retaining means disposed between said fastening means and said housing for automatically retaining said housing in the selected orientation relative to said fastening means, whereby said entrance opening can be placed in the desired orientation relative to the air flow independently of the orientation of said fastening means; and counterweight support means connected to said paddle blade, said counterweight support means and said paddle blade being located at respectively opposite sides of the pivot axis of said paddle blade.
  • An arrangement as defined in claim 4 further comprising a tension spring connected to said paddle blade for applying to said blade a biasing force tending to urge said blade toward its minimum air velocity indicating position.
  • an air flow measuring sport speedometer composed of a housing carrying an indicator scale and defining an air guide channel and an air entrance opening via which air moving past an object whose velocity is to be measured passes from the region outside the housing into the channel. and means for fastening the housing to the object whose velocity is to be measured.
  • the improvement comprising: means connected between said fastening means to said housing for permitting the orientation of said housing relative to said fastening means to be selectively varied: retaining means disposed between said fastening means and said housing for automatically retaining said housing in the selected orientation relative to said fastening means, whereby said entrance opening can be placed in the desired orientation relative to the air flow independently of the orientation of said fastening means; an instantaneous air velocity indicator including a paddle blade mounted in the housing to extend into the channel and arranged to pivot relative to the housing under the influence of the air flowing through the channel, a velocity indication pointer provided at the end of said paddle blade and arranged to cooperate with said indicator scale; and a drag pointer disposed in said housing and mounted to pivot relative to said housing about an axis parallel to the pivot axis of said paddle blade.
  • said drag pointer being mounted to be pivoted by said paddle blade to traverse said scale in the direction of increasing air flow velocity indications and to automatically remain at the maximum air flow velocity indication attained by said paddle blade and wherein said housing carries two indicator scales oriented transverse to one another and said paddle blade and its associated pointer are arranged to cooperate with both of said indicator scales.
  • An arrangement as defined in claim 6 further comprising reset means mounted on, and extending to the region outside, said housing and operatively associated with said drag pointer for returning said drag pointer to its minimum velocity indication position.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Instrument Panels (AREA)
  • Measuring Fluid Pressure (AREA)
US339945A 1972-03-11 1973-03-09 Sport speedometer Expired - Lifetime US3877303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722211887 DE2211887B1 (de) 1972-03-11 1972-03-11 Sport-tachometer

Publications (1)

Publication Number Publication Date
US3877303A true US3877303A (en) 1975-04-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
US339945A Expired - Lifetime US3877303A (en) 1972-03-11 1973-03-09 Sport speedometer

Country Status (4)

Country Link
US (1) US3877303A (enrdf_load_stackoverflow)
CH (1) CH549805A (enrdf_load_stackoverflow)
DE (1) DE2211887B1 (enrdf_load_stackoverflow)
FR (1) FR2175936B1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613275A1 (de) * 1976-03-27 1977-10-06 Goetz Dipl Ing Tippelmann Vorrichtung zur untersuchung und abstimmung der drallstroemung in verbrennungsraeumen
USD256102S (en) 1977-11-10 1980-07-29 Hayward William K Voltage meter
US4638812A (en) * 1983-01-04 1987-01-27 Etela Hameen Keuhkovammyhdistys R.Y. Exhalation flow meter
WO2006131954A1 (en) * 2005-06-08 2006-12-14 Fulvio Milani Portable device for speed measurement
US20130255564A1 (en) * 2012-03-30 2013-10-03 Numatics, Incorporated Dual Indicator Gauge

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US925814A (en) * 1907-05-18 1909-06-22 Joseph W Jones Maximum-hand for speedometer-indicators or the like.
US3040698A (en) * 1959-07-20 1962-06-26 Ralph M Hill Instrument construction
US3096647A (en) * 1960-08-15 1963-07-09 Phillips Petroleum Co Flow measuring system
US3287971A (en) * 1964-06-10 1966-11-29 Weatherhead Co Flowmeter
US3380302A (en) * 1965-05-26 1968-04-30 Unicon Systems Inc Flowmeter
US3404566A (en) * 1966-09-08 1968-10-08 Elmer R. Cordova Wind tee and velocity indicator
US3564917A (en) * 1968-07-25 1971-02-23 Trimen Inc Maximum air speed indicator
US3681983A (en) * 1971-05-11 1972-08-08 William Alexander System for measuring fluid flow
US3681987A (en) * 1970-08-21 1972-08-08 Asa P Ruskin Air actuated ski speedometer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120515A (fr) * 1953-12-01 1956-07-09 Bendix Aviat Corp Débit-mètre à double sensibilité

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US925814A (en) * 1907-05-18 1909-06-22 Joseph W Jones Maximum-hand for speedometer-indicators or the like.
US3040698A (en) * 1959-07-20 1962-06-26 Ralph M Hill Instrument construction
US3096647A (en) * 1960-08-15 1963-07-09 Phillips Petroleum Co Flow measuring system
US3287971A (en) * 1964-06-10 1966-11-29 Weatherhead Co Flowmeter
US3380302A (en) * 1965-05-26 1968-04-30 Unicon Systems Inc Flowmeter
US3404566A (en) * 1966-09-08 1968-10-08 Elmer R. Cordova Wind tee and velocity indicator
US3564917A (en) * 1968-07-25 1971-02-23 Trimen Inc Maximum air speed indicator
US3681987A (en) * 1970-08-21 1972-08-08 Asa P Ruskin Air actuated ski speedometer
US3681983A (en) * 1971-05-11 1972-08-08 William Alexander System for measuring fluid flow

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613275A1 (de) * 1976-03-27 1977-10-06 Goetz Dipl Ing Tippelmann Vorrichtung zur untersuchung und abstimmung der drallstroemung in verbrennungsraeumen
USD256102S (en) 1977-11-10 1980-07-29 Hayward William K Voltage meter
US4638812A (en) * 1983-01-04 1987-01-27 Etela Hameen Keuhkovammyhdistys R.Y. Exhalation flow meter
WO2006131954A1 (en) * 2005-06-08 2006-12-14 Fulvio Milani Portable device for speed measurement
US20130255564A1 (en) * 2012-03-30 2013-10-03 Numatics, Incorporated Dual Indicator Gauge

Also Published As

Publication number Publication date
DE2211887C2 (enrdf_load_stackoverflow) 1974-02-28
CH549805A (de) 1974-05-31
FR2175936B1 (enrdf_load_stackoverflow) 1976-11-05
FR2175936A1 (enrdf_load_stackoverflow) 1973-10-26
DE2211887B1 (de) 1973-08-02

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