US4819141A
Expired / Lapsed
US
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Flashlight
Assignee: Mag Instrument Inc
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Filing: 1987-04-27
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Granted: 1989-04-04
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Expires: 2007-04-27
Abstract
Abstract A flashlight having a conductive barrel and a tailcap insert which provides for a conductive path through the tail assembly region of the flashlight to the batteries contained in the barrel.
Inventors
- 👤 Anthony Maglica
- 👤 Robert J. DeLong
- 👤 Armis L. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:52
CPC Classifications
F; F21; F21V; F21V31/00; F21V31/005; F21L; F21L2/00; F21L4/00; F21L4/005; F21S; F21S9/00; F21S9/02; F21V14/00; F21V14/02; F21V14/025; F21V14/04; F21V14/045; F21V19/00; F21V19/04; F21V19/047; F21V23/00; F21V23/04; F21V23/0414; F21V31/03; H; H01; H01H; H01H13/00; H01H13/50; H01H13/56; H01H13/58; F21S6/00; F21V15/00; F21V15/01; H01H9/00; H01H9/02; H01H9/04; H01H2009/048
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A flashlight comprising: a barrel made of an electrically conductive material and for retaining a battery source of power; a tailcap having a non-conductive layer on its surface and threadably engaging one end of the barrel; a spring electrically coupled to the battery source of power a head assembly including a reflector and a lens adapted to engage the outer end of the barrel; a bulb; means for electrically coupling the bulb to the battery source of power; means for switching the flashlight on and off; and an insert made of an electrically conductive material positioned within and along a major portion of the length of the tailcap wherein the insert provides for a conductive path between the barrel and the spring; and wherein the spring is positioned partially within the insert.
Claim 2
Dependent Claim
132 words
A flashlight comprising: a barrel made of an electrically conductive material and for retaining a battery source of power; a tailcap having a non-conductive layer on its surface and threadably engaging one end of the barrel; a spring electrically coupled to the battery source of power a head assembly including a reflector and a lens adapted to engage the outer end of the barrel; a bulb; means for electrically coupling the bulb to the battery source of power; means for switching the flashlight on and off; and an insert made of an electrically conductive material positioned within and along a major portion of the length of the tailcap wherein the insert provides for a conductive path between the barrel and the spring; and wherein the spring is positioned partially within the insert.
Claim 3
Dependent Claim
43 words
The flashlight of claim 1 wherein the insert is a cylindrical member having means for retaining a spare bulb, means for securing the insert into the tailcap assembly and means for preventing the spring from retracting into the insert beyond a pre-determined location.
Claim 4
Dependent Claim
114 words
An insert for use in a flashlight of the type having a barrel, a battery source of power, a tailcap and a spring which forms an electrical contact with one end of the battery source of power, said insert comprising: a conductive generally cylindrically shaped member sized for insertion into and along at least one-half the length of the tailcap of the flashlight and disposed to provide electrical coupling between the barrel and the spring; and a plurality of indents in the member and positioned to retain a spare bulb for the flashlight, wherein the inert provides for a conductive path between the barrel in a tailcap region of the flashlight and the spring.
Claim 5
Dependent Claim
114 words
An insert for use in a flashlight of the type having a barrel, a battery source of power, a tailcap and a spring which forms an electrical contact with one end of the battery source of power, said insert comprising: a conductive generally cylindrically shaped member sized for insertion into and along at least one-half the length of the tailcap of the flashlight and disposed to provide electrical coupling between the barrel and the spring; and a plurality of indents in the member and positioned to retain a spare bulb for the flashlight, wherein the inert provides for a conductive path between the barrel in a tailcap region of the flashlight and the spring.
Claim 6
Dependent Claim
15 words
The insert of claim 3 further comprising: means for securing the insert within the tailcap.
Claim 7
Dependent Claim
22 words
The insert of claim 4 further comprising: means for preventing a tailcap spring from retracting within the insert beyond a pre-determined distance.
Claim 8
Dependent Claim
26 words
The insert of claim 3 wherein the insert includes means for electrically coupling the barrel to the insert, said means extending radially outwardly from the insert.
Claim 9
Dependent Claim
137 words
A flashlight comprising: a barrel made of an electrically conductive material and for retaining a battery source of power; a tailcap having a non-conductive layer on its surface and threadably engaging one end of the barrel, a spring disposed within the barrel and being adapted to engage the battery source of power, a head assembly including a reflector and a lens, the assembly being adapted to engage the other end of the barrel; a bulb; means for electrically coupling the bulb to the battery source of power; means for switching the flashlight on and off; and an cylindrical insert made of an electrically conductive material positioned within and extending along at least one half the length of the tailcap and extending therefrom and engaging the spring to provide a conductive path between the barrel and the spring.
Claim 10
Dependent Claim
137 words
A flashlight comprising: a barrel made of an electrically conductive material and for retaining a battery source of power; a tailcap having a non-conductive layer on its surface and threadably engaging one end of the barrel, a spring disposed within the barrel and being adapted to engage the battery source of power, a head assembly including a reflector and a lens, the assembly being adapted to engage the other end of the barrel; a bulb; means for electrically coupling the bulb to the battery source of power; means for switching the flashlight on and off; and an cylindrical insert made of an electrically conductive material positioned within and extending along at least one half the length of the tailcap and extending therefrom and engaging the spring to provide a conductive path between the barrel and the spring.
Claim 11
Dependent Claim
94 words
An insert for a flashlight having a barrel, a lamp bulb, a battery source of power, a spring electrically coupled to the battery source of power and a tailcap said insert comprising: a conductive metal insert positioned within the barrel, electrically coupling the barrel to the spring and having a body portion of tubular shape and of a size capable of containing a spare lamp bulb and a pair of arm members extending radially outwardly from the body portion and contacting the barrel to provide a conductive path between the barrel and the spring.
Claim 12
Dependent Claim
94 words
An insert for a flashlight having a barrel, a lamp bulb, a battery source of power, a spring electrically coupled to the battery source of power and a tailcap said insert comprising: a conductive metal insert positioned within the barrel, electrically coupling the barrel to the spring and having a body portion of tubular shape and of a size capable of containing a spare lamp bulb and a pair of arm members extending radially outwardly from the body portion and contacting the barrel to provide a conductive path between the barrel and the spring.
Claim 13
Dependent Claim
32 words
The flashlight of claim 8 wherein the arm members further include near their distal ends portions which curve back in towards the body portion of the insert and bear against the barrel.
References Cited (Backward Citations)
US1559481A
Cited
US1680188A
Cited
US1680169A
Cited
US1568093A
Cited
US1599095A
Cited
US1680484A
Cited
US1769436A
Cited
US1768554A
Cited
US1905787A
Cited
US2051889A
Cited
US2097222A
Cited
US2229486A
Cited
US2210312A
Cited
US2298042A
Cited
US2341057A
Cited
US2493205A
Cited
US2530913A
Cited
US4151583A
Cited
US4286311A
Cited
US4357648A
Cited
US4527223A
Cited
US4577263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |