Illumination – Light source and modifier – Adjustable or repositionable light source or light source...
Patent
1994-04-13
1996-04-30
Lazarus, I.
Illumination
Light source and modifier
Adjustable or repositionable light source or light source...
362274, 362289, 362386, F21V 2122
Patent
active
055130852
ABSTRACT:
An in-ground light, motion detector, or other active element is housed in a telescopically mounted housing so that it can be retracted to ground level when not in use and positioned above the ground when in use. A motor that extends and retracts the telescopically mounted housing relative to a main housing is rotatably mounted in a nonrotatable motor housing that adjoins the main housing. A plate having electrical contacts is mounted to the motor so that the contacts rotate when the motor rotates. A second plate having electrical contacts is nonrotatably secured to the motor housing so that relative rotation of the two plates activates and deactivates the motor. Relative rotation of the plates occurs when the telescopically mounted housing is fully extended or fully retracted because the rotational energy of the motor's output shaft is transferred to the motor when full extension or retraction has been achieved. In an alternative embodiment, a magnetic strip and associated sensor are employed to precisely control the instantaneous positioning of the telescoping housing with respect to the main housing. In another embodiment, the light pivots upon deployment into any preselected angular position, and a flexible boot protects the interior elements of the device when the telescopic housing is extended. Another embodiment has structure that prevents damage to the apparatus when the telescopically mounted housing is prevented from deploying or forced into its retracted position.
REFERENCES:
patent: 4984139 (1991-01-01), Goggia
patent: 5003441 (1991-03-01), Crowe et al.
patent: 5068773 (1991-11-01), Toth
patent: 5075834 (1991-12-01), Puglisi
Lazarus I.
Mason, Jr. Joseph C.
Quach Y.
Smith Ronald E.
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