Communications: electrical – Selective – Having indication or alarm
Patent
1987-01-28
1988-05-17
Crosland, Donnie L.
Communications: electrical
Selective
Having indication or alarm
340 52D, 340672, 340686, 340687, 180247, 192 30W, B60Q 100
Patent
active
047453907
ABSTRACT:
In a four wheel drive vehicle wherein unintended engagement of the first driving axle during vehicle use will result in damage to the vehicle drive train, an apparatus for sensing and indicating the status of the front driving axle without requiring the vehicle occupants to stop the vehicle and perform a visual inspection of the vehicle drive train including, in combination, a drive train shaft that rotates whenever the front driving axle of the vehicle is engaged in four wheel drive and a permanent magnet fixedly secured to the drive train shaft. Magnetically activated relay means, such as a reed switch, are operatively connected to a battery in the vehicle and to an illumination means for switching the illumination means on and off. The relay means are fixedly attached to a stationary portion of the vehicle at a location so that as the magnet rotates with the drive train shaft, it interacts with the relay means to alternatively energize the illumination means whenever the magnet is proximate the relay means and de-energize the illumination means whenever the magnet is remote from the relay means. A counterbalance means are fixedly secured to the drive train shaft opposite the magnet for providing a stabilizing counterweight to the out-of-line torque forces produced by the magnet as it rotates on the drive train shaft.
REFERENCES:
patent: 3728676 (1973-04-01), Brown
patent: 4200816 (1980-04-01), Hopkins
patent: 4340133 (1982-07-01), Blersch
patent: 4664217 (1987-05-01), Welch et al.
Oden Darrell B.
Oden Michael A.
Arant Gene W.
Crosland Donnie L.
Jodzuewicz Matthew F.
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