Electric lamp and discharge devices – With envelope
Reexamination Certificate
2007-04-23
2010-02-02
Williams, Joseph L (Department: 2889)
Electric lamp and discharge devices
With envelope
C313S318010
Reexamination Certificate
active
07656080
ABSTRACT:
A vibration resistant, energy efficient lamp (10) that is suitable for, for example, ceiling fan operation where vibration is always a concern. The lamp (10) comprises an envelope (12) of a suitable transparent glass, for example, a borosilicate glass, having a substantially spherical upper body (14) with a given diameter D, a substantially cylindrical waist (16) having a diameter W of about 38% of the given diameter; a neck portion (18) having a diameter N of about 31 to about 32% of the given diameter and a threaded base (20) having a diameter B of about 25 to 27% of the given diameter. The base (20) has a skirt portion (22) adjacent the neck portion having diameter S substantially equal to the neck portion (18) diameter N and larger than the diameter B of the base (20). The skirt (22) provides a broader attachment area for the neck (18), thus strengthening the coupling and providing a stronger joint that is more suited to operations in those functions where vibration can be encountered, especially in those areas where the lamp is mounted base-up.
REFERENCES:
patent: D541440 (2007-04-01), Feit
patent: 2004/0017156 (2004-01-01), Yasuda et al.
Emerling Catherine M.
Hernandez, Jr. Fred
Hsu Chin Shui
Wang Joe
Everlite Electric Ind. Corp.
Farokhrooz Fatima N
McNeill William H.
Montana Shaun P.
Osram Sylvania Inc.
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