US3560730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric hand lamp
Assignee: Oldham Crompton Batteries Ltd
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Filing: 1968-06-05
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Granted: 1971-02-02
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Expires: 1988-06-05
Abstract
Abstract An electric handlamp comprises a headpiece which includes a shell housing a bulb holder and which is detachable from a battery housing to permit the headpiece to be used at a position remote from the battery housing. To this end the bulb holder is connected with battery connections by a cable which is contained in the battery housing in a manner such that it can be withdrawn from and drawn into the housing.
Inventors
- 👤 Harold Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:28
CPC Classifications
F; F21; F21L; F21L4/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
A handlamp comprising an electric battery housing; a headpiece mounting forming a chamber with an end wall of the housing, a spindle secured to said end wall and connecting the headpiece mounting to the end wall for rotation about the spindle; a headpiece detachably connected to the headpiece mounting and including a shell housing a lens ring, a reflector, and a bulb holder; a sheathed cable electrically connecting the bulb holder with battery connections in the battery housing and extending through said headpiece mounting in a manner such that rotation of the headpiece mounting in one direction about the spindle unwinds the cable from around the spindle to permit withdrawal of the cable from said chamber on detachment of the headpiece from the headpiece mounting and rotation in the opposite direction rewinds the cable into said chamber around the spindle preparatory to reattachment of the headpiece to the headpiece mounting; and a switch operable to make or break contact between said battery connections and a bulb held in the holder.
Claim 2
Dependent Claim
170 words
A handlamp comprising an electric battery housing; a headpiece mounting forming a chamber with an end wall of the housing, a spindle secured to said end wall and connecting the headpiece mounting to the end wall for rotation about the spindle; a headpiece detachably connected to the headpiece mounting and including a shell housing a lens ring, a reflector, and a bulb holder; a sheathed cable electrically connecting the bulb holder with battery connections in the battery housing and extending through said headpiece mounting in a manner such that rotation of the headpiece mounting in one direction about the spindle unwinds the cable from around the spindle to permit withdrawal of the cable from said chamber on detachment of the headpiece from the headpiece mounting and rotation in the opposite direction rewinds the cable into said chamber around the spindle preparatory to reattachment of the headpiece to the headpiece mounting; and a switch operable to make or break contact between said battery connections and a bulb held in the holder.
Claim 3
Dependent Claim
75 words
A handlamp according to claim 1, wherein diametrically opposed lugs extend laterally from the headpiece shell and are locatable in grooves formed in said headpiece mounting, and wherein the lugs are retained in said grooves by a handle having inturned ends which extend through the headpiece mounting to cooperate with the grooves to retain the lugs in the grooves and which are withdrawable axially to release the lugs to permit removal thereof from the grooves.
Claim 4
Dependent Claim
45 words
A handlamp according to claim 2, wherein the headpiece mounting is provided with cam members arranged to cooperate with said handle in a manner such that rotation of the handle about the axes of the inturned ends effects said axial withdrawal of the inturned ends.
References Cited (Backward Citations)
US1282555A
Cited
US1959979A
Cited
US2071557A
Cited
US2369637A
Cited
US2524435A
Cited
US2816277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |