Vibrometer
First Claim
Patent Images
1. A vibrometer comprising:
- a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface;
a reed clamp defining a generally planar reed support surface and mounted on said support with said reed support surface thereof facing said reed support surface of said support;
a reed unit disposed between and engaging said reed support surfaces, said reed unit comprising a base portion and at least two projecting vibratory reed portions and being movable relative to said support between at least two predetermined positions, one of said reed portions having an effective length that is a predetermined amount greater than that of the other of said reed portions when said reed unit is in either of said predetermined positions, and each of said reed portions being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof,cooperating indicia on said reed unit and one of said support and said clamp indicating in which of said predetermined positions said reed unit is located; and
,a cover over and generally surrounding said reeds, the generally vertical end of said cover nearest the free ends of said reed portions being essentially transparent whereby an observer may observe vibration of the ends of said portions.
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Abstract
A vibrometer comprising a reed unit adjustably clamped in position within a case. The reed unit includes three vibratory reed portions projecting from a base. Each of the reeds will vibrate at its natural frequency in response to vibration at a preselected vehicle speed, and adjustment of the reed unit according to tire size maintains the speed at which the reeds will vibrate substantially constant.
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Citations
25 Claims
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1. A vibrometer comprising:
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a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface; a reed clamp defining a generally planar reed support surface and mounted on said support with said reed support surface thereof facing said reed support surface of said support; a reed unit disposed between and engaging said reed support surfaces, said reed unit comprising a base portion and at least two projecting vibratory reed portions and being movable relative to said support between at least two predetermined positions, one of said reed portions having an effective length that is a predetermined amount greater than that of the other of said reed portions when said reed unit is in either of said predetermined positions, and each of said reed portions being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof, cooperating indicia on said reed unit and one of said support and said clamp indicating in which of said predetermined positions said reed unit is located; and
,a cover over and generally surrounding said reeds, the generally vertical end of said cover nearest the free ends of said reed portions being essentially transparent whereby an observer may observe vibration of the ends of said portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A vibrometer comprising:
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a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface; a reed clamp defining a generally planar reed support surface and mounted on said support with said reed support surface thereof facing said reed support surface of said support; a reed unit disposed between and engaging said reed support surfaces, said reed unit comprising a base portion and at least two projecting vibratory reed portions and being movable relative to said support between at least two predetermined positions, one of said reed portions having an effective length that is a predetermined amount greater than that of the other of said reed portions when said reed unit is in either of said predetermined positions, and each of said reed portions being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof; and
,cooperating indicia on said reed unit and one of said support and said clamp indicating in which of said predetermined positions said reed unit is located, said support and said clamp each defining a respective edge aligned with the edge of the other and engaging said reed portion, and each of said edges including generally parallel edge portions stepped with respect to each other such that the edge portion engaging one of said reeds is more closely adjacent the end of said one reed than the edge portion engaging said another reed is to the end of said another reed. - View Dependent Claims (20)
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21. A vibrometer comprising:
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a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface; a reed clamp defining a generally planar reed support surface and mounted on said support with said reed support surface thereof facing said reed support surface of said support; a reed unit disposed between and engaging said reed support surfaces, said reed unit comprising a base portion and at least two projecting vibratory reed portions and being movable relative to said support between at least two predetermined positions, one of said reed portions having an effective length that is a predetermined amount greater than that of the other of said reed portions when said reed unit is in either of said predetermined positions, and each of said reed portions being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof; and
,cooperating indicia on said reed unit and one of said support and said clamp indicating in which of said predetermined positions a said reed unit is located; a case including a cover extending over and spaced from said clamp; and spring means engaging said clamp and forcing said clamp against said reed unit.
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22. A vibrometer comprising:
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a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface; a reed clamp defining a generally planar reed support surface and mounted on said support with said reed support surface thereof facing said reed support surface of said support; a unitary reed unit disposed between and engaging said reed support surfaces of said support and said clamps, said reed unit comprising a base portion and at least two projecting vibratory reed portions and being movable relative to said support between at least two predetermined positions, one of said reed portions having an effective length that is a predetermined amount greater than that of the other of said reed portions when said reed unit is in either of said predetermined positions, each of said reed portions being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof and said reed portions being substantially parallel to and spaced apart from each other; means for urging said clamp and support towards each other; and
,means for locating said reeds in said positions and including cooperating indicia on said reed unit and one of said support and said clamp for indicating in which of said positions said reeds are located, the distance each of said reeds moves between said positions thereof being about equal to the difference in effective length between a reed of the construction of said one reed having a natural frequency of km1 /r1 and a reed of the same construction having a natural frequency of km2 /r2.
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23. A vibrometer comprising:
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a support adapted for removable mounting on a vehicle and defining a generally planar reed support surface; a reed clamp defining a generally planar reed support surface and mounted on said reed support with said reed support surface thereof facing said reed support surface of said support; a reed unit disposed between and engaging said reed support surfaces, said reed unit including a vibratory reed portion comprising a pair of wires converging towards a tip spaced from said support and clamp and being movable relative to said support between at least two predetermined positions, said reed portion being of greater effective length when said reed unit is in one of said positions than when said reed unit is in the other of said positions thereof; and
,cooperating indicia on said reed unit and one of said support and said clamp indicating in which of said predetermined positions said reed unit is located. - View Dependent Claims (24, 25)
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Specification