US3835272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary screw switch
Assignee: Individual
•
Filing: 1973-04-19
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Granted: 1974-09-10
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Expires: 1993-04-19
Abstract
Abstract A flashlight is described having a switch which employs two existing components of conventional flashlights in such a manner as to eliminate a separate thumb switch, but which retains the function of the separate switch. The switch employs the threaded end cap of the flashlight which is tightened to make contact between the barrel of the flashlight and loosened to break the circuit. The tube or barrel of the flashlight serves as one conduit and a spring used to bias the batteries is the other. The circuit is closed by bringing the barrel into contact with a portion of the spring. The switch has other application than to flashlights.
Inventors
- 👤 E Wisenbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:35
CPC Classifications
F; F21; F21V; F21V23/00; F21V23/04; H; H01; H01H; H01H21/00; H01H21/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An electrical switch comprising: a tube member having threads toward one end thereof, a non-conducting cap member having threads therein and engaged with said threads on said tube member and rotatable thereon, a first electrical contact mounted in the top of said cap member and aligned with the end of said tube member removably engaging said end and forming an electriCal contact therewith, such engagement being subject to the relative rotation of the cap and tube members to draw the cap member onto said tube member, said tube member being a second electrical contact and a depressable latch in said cap member in depressed contact with the end of said tube member and a notch in the end of said tube member removably engaging said latch.
Claim 2
Dependent Claim
126 words
An electrical switch comprising: a tube member having threads toward one end thereof, a non-conducting cap member having threads therein and engaged with said threads on said tube member and rotatable thereon, a first electrical contact mounted in the top of said cap member and aligned with the end of said tube member removably engaging said end and forming an electriCal contact therewith, such engagement being subject to the relative rotation of the cap and tube members to draw the cap member onto said tube member, said tube member being a second electrical contact and a depressable latch in said cap member in depressed contact with the end of said tube member and a notch in the end of said tube member removably engaging said latch.
Claim 3
Dependent Claim
28 words
The electrical switch according to claim 1 wherein said notch is positioned for engaging said latch therein and bringing said first and second electrical contacts into electrical engagement.
Claim 4
Dependent Claim
29 words
The electrical switch according to claim 1 comprising a first notch positioned for engaging said latch therein and holding said first and second electrical contacts out of electrical engagement.
Claim 5
Dependent Claim
16 words
The electrical switch according to claim 3 wherein said first electrical contact comprises a biasing means.
Claim 6
Dependent Claim
23 words
The electrical switch according to claim 4 wherein said threads on said tube member are longer than said threads in said cap member.
Claim 7
Dependent Claim
37 words
The electrical switch according to claim 1 comprising an elongated tube member adapted to hold batteries, an illuminating means mounted on one end of said tube member opposite said cap member and electrically contacting said tube member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |