Measuring and testing – Vibration
Reexamination Certificate
2000-05-30
2001-10-02
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
C073S652000, C073S654000, C200S06145M, C200S05100R
Reexamination Certificate
active
06295871
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a vibration sensing device. More particularly, the present invention relates to a vibration sensing device which has a high sensitive function.
Most conventional vibration sensing devices have complex structures. One types of the conventional vibration sensing devices has a mechanical vibration sensing structure. The second type of the conventional vibration sensing devices has a resistance vibration sensing structure. The third types of the conventional vibration sensing devices has a magnetic vibration sensing structure.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a vibration sensing device which has a plumb ball to contact a free ball in order to conduct electrically or not to contact the free ball in order to discontinue an electrical conduction.
Another object of the present invention is to provide a vibration sensing device which has a thread and a length of the thread can be adjusted so that various sensitivities can be obtained.
In accordance with a first preferred embodiment the represent invention, a vibration sensing device comprises a spherical shell, an insulating cushion inserted in a top portion of the spherical shell, a conductive probe rod passing through the insulating cushion, a conductive thread connected to an end of the conductive probe rod, and a conductive plumb ball connected to the conductive thread. A conductive free ball is disposed in the spherical shell.
In accordance with a second preferred embodiment of the present invention, a vibration sensing device comprises a spherical shell, an insulating cushion inserted in a top portion of the of the spherical shell, a screw rod passing through the insulating cushion, a conductive probe tube inserted in the inserted in the insulating cushion, a conductive thread connected to an end of the screw rod, and a conductive plumb ball connected to the conductive thread. A nut fastens an upper end of the screw rod. The conductive probe tube has a channel. The conductive thread passes through the channel of the conductive probe tube. A conductive free ball is disposed in the spherical shell.
In accordance with a second preferred embodiment of the present invention, a vibration sensing device comprises a semispherical shell, a cover covering the semispherical shell, a channel formed in a center portion of the cover, a screw rod passing through the channel, a conductive thread connected to an end of the screw rod, and a conductive plumb ball connected to the conductive thread. A nut fastens an upper end of the screw rod. A conductive free ball is disposed in the semispherical shell.
REFERENCES:
patent: 3617664 (1971-11-01), Tetrault
patent: 4042796 (1977-08-01), Zink
patent: 4751353 (1988-06-01), Stephens
patent: 5153566 (1992-10-01), Yun
patent: 5826568 (1998-10-01), Van Ross, Jr.
Rosenberg , Klein & Lee
Saint-Surin Jacques M.
Williams Hezron
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