Signals and indicators – Indicators – Rectilinear indicator with actuating means
Patent
1986-08-15
1987-12-01
Shoap, Allan N.
Signals and indicators
Indicators
Rectilinear indicator with actuating means
116281, 411548, G01D 500
Patent
active
047096543
ABSTRACT:
A device for indicating when a lug nut has come loose on an automobile wheel. In one embodiment, the device operates by detecting relative movement between the lug nut and the axle stud on which it is mounted. In a second embodiment, the detected relative movement is between the lug nut and the wheel itself. In the preferred embodiment, the device has a first member with an open-ended channel and second and third members slideably received in it. The second member operates in cooperation with the sides of the channel and one of the springs to hold the third member in a retracted or cocked position when the lug nut is in its preferred, tight position against the wheel. Thereafter, should the lug nut come loose and move relative to the stud, the second member will follow or move under the force of its spring outwardly to maintain contact with the free end of the stud. In doing so, the third or indicator member is released to move in the opposite direction under the force of its spring to protrude beyond the outer surface of the lug nut where it can be easily and quickly seen or felt by hand. In the second embodiment, the second or follower member abuts the wheel itself rather than the free end of the stud but otherwise operates in the same manner.
REFERENCES:
patent: 2738754 (1956-03-01), Bierer
patent: 3161174 (1964-12-01), Harrison
patent: 3183882 (1965-05-01), Preece
patent: 3776031 (1973-12-01), Trigg
patent: 3908508 (1975-09-01), Payne
patent: 3964299 (1976-11-01), Johnson
patent: 4041776 (1977-08-01), Payne
patent: 4058079 (1977-11-01), Taylor et al.
patent: 4073212 (1978-02-01), Lerich
patent: 4217849 (1980-08-01), Brown et al.
patent: 4626121 (1986-12-01), Tajima et al.
Carson W. Scott
Shoap Allan N.
Worth W. Morris
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