US3767913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated lamp guard
Assignee: Woodhead Industries LLC
•
Filing: 1972-10-12
•
Granted: 1973-10-23
•
Expires: 1992-10-12
Abstract
Abstract A lamp guard with a substantially cylindrical, hollow body including a flaring, e.g., dome-like, upper portion; a hollow, substantially cylindrical coaxial neck on the domed portion; elongated, horizontal, circumferentially spaced, ventilating slots in the upper portion of the body; and longitudinally arcuate, curtain walls depending from the flaring portion radially inwardly of the respective slots and extending approximately the length of the respective slots and below the lower edges thereof.
Inventors
- 👤 T Trevithick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:23
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/83; F21V15/00; F21V15/01; F21V17/00; F21V17/06; F21V21/00; F21V21/008
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A lamp bulb guard comprising a substantially cylindrical, hollow body adapted to house the lamp bulb therein and including a flared upper portion; elongated, horizontal, circumferentially spaced, ventilating slots in the upper part of said body; and longitudinally arcuate, curtain walls depending from the flared portion near but radially inwardly of respective slots and extending approximately the length of the respective slots.
Claim 2
Dependent Claim
62 words
A lamp bulb guard comprising a substantially cylindrical, hollow body adapted to house the lamp bulb therein and including a flared upper portion; elongated, horizontal, circumferentially spaced, ventilating slots in the upper part of said body; and longitudinally arcuate, curtain walls depending from the flared portion near but radially inwardly of respective slots and extending approximately the length of the respective slots.
Claim 3
Dependent Claim
28 words
A lamp bulb guard as claimed in claim 1, said body, its flared upper portion, and the curtain walls being an integral molding of a light-transmitting, synthetic polymer.
Claim 4
Dependent Claim
28 words
A lamp bulb guard as claimed in claim 1, said curtain walls respectively being slightly shorter than and wider than the respective lengths and widths of said slots.
Claim 5
Dependent Claim
25 words
A lamp bulb guard as claimed in claim 3, the lower edge portions of said curtain walls being bevelled to a relatively sharp lower edge.
Claim 6
Dependent Claim
25 words
A lamp bulb guard as claimed in claim 1, the lower edge portions of said curtain walls being bevelled to a relatively sharp lower edge.
Claim 7
Dependent Claim
47 words
A lamp bulb guard as claimed in claim 1, the upper edges of respective slots being in the periphery of the flared upper portion and having radially outer edge portions located radially inwardly of the radially inner edge portions of the bottom edge portions of respective slots.
Claim 8
Dependent Claim
28 words
A lamp bulb guard as claimed in claim 6, said bottom edge portions being bevelled edges sloping downwardly and radially outwardly from a relatively sharp, radially inward edge.
Claim 9
Dependent Claim
55 words
A light string embodying electrical cable or wire means having a plurality of downwardly facing, lamp bulb sockets at spaced intervals thereon, said sockets being in respective dielectric housings, and a lamp bulb guard as claimed in claim 1 depending from each housing in protective, surrounding relationship to lamp bulbs mounted in their respective sockets.
References Cited (Backward Citations)
US1726550A
Cited
US3609348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |