USD30856S - Design for an electric-lamp bulb - Google Patents
Design for an electric-lamp bulb Download PDFInfo
- Publication number
- USD30856S USD30856S US D30856 S USD30856 S US D30856S
- Authority
- US
- United States
- Prior art keywords
- design
- electric
- bulb
- lamp bulb
- lamp
- Prior art date
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- 210000001699 lower leg Anatomy 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 240000001987 Pyrus communis Species 0.000 description 2
- 235000014443 Pyrus communis Nutrition 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
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Description
026-? AU 291 EX OR D 30,856
DESIGN.
Patented May 23, 1899. L. L. DAVIS.
ELECTRIC LAMP BULB.
[Application Med Apr. 8, 1890.)
UNITED STATES PATENT OFFICE.
LEONARD L. DAVIS, OF SPRINGFIELD, MASSACHUSETTS.
DESIGN FOR AN ELECTRIC-LAMP BULB.
SPECIFICATION forming part of Design No. 30,856, dated May 23, 1899.
Application filed April 8, 1899. Serial No. 712,326. Term of patent 7 years.
To all whom, it may concern:
Be it known that I, LEONARD L. DAvIs, a citizen of the United States of America, and a resident of Springfield, in the county of IIampden and State of Massachusetts, have invented and produced a new and original Design for an Electric-Lamp Bulb, of which the following is a full, clear, and exact description.
This design relates to the peculiar and distinctive formation or 'eontou r of the glass bulb for an incandescent electric lamp; and the design consists in certain modifications of ordepartures from the ordinary pear shape in which electric-lamp bulbs are commonly formed, whereby the bulb is rendered of an extremely pleasing shape.
Theleadingcharacteristic of the design consists in an annular shoulder or bead at an intermediate part of the neck of the lamp-bulb, having a rounded outer edge and joined to the adjacent intermediate portions of the neck of the lamp-bulb thereabove by a concave surface continuation, A in the drawing representing the bulb, 1; representing the shank portion, which is of substantially cylindrical form, merging into the approximately spher' ical upper part (t of the bulb in divergent curves, and 1) representing the encircling shoulder or head formed at the intermediate part of the shank of the lump, the rounded salient portion of which merges into the portion of the shank nextthereabove by the concave curving surfaces, as indicated at (I, and the upper portion of the bulb is formed with its top carried to the apex in lines external of a true spherical contour, and as indicated at ff, being a departure from the primary ballshaped top and also a departu re from the very common central upstanding sharply-tapering teat heretofore comprised in the formation of the bulbs.
\Vhat I claim is The design for an electrie'lamp bulb substantially as herein shown and described.
In testimony whereof I have signed my name in presence of two subscribing witnesses.
LEONARD L. DAVIS.
\Vitnesses:
WM. S. BELLows, M. A. CAMPBELL.
Family
ID=
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