Patent US4242715A successfully refreshed from Google Patents.
US4242715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-defense apparatus
Assignee: ULTRADYNE Inc
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Filing: 1978-08-10
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Granted: 1980-12-30
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Expires: 1998-08-10
Abstract
Abstract A self-defense apparatus includes a battery-powered source of high voltage arranged in an insulated housing and a finger probe device which is strapped to one finger of one hand of the user and is electrically connected to the source of high voltage. The finger probe device includes a layer of electrical insulation disposed between the finger and two metal prongs which protrude outwardly adjacent the distal end of the finger. One prong couples to the hot side of the source of high voltage and the other prong couples to the ground side of the source of high voltage. A two conductor cable connects the two prongs to the source of high voltage and when both prongs are placed in contact with an electrically conductive surface, they deliver in excess of 1,200 volts.
Inventors
- 👤 Gerald Laird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:32
CPC Classifications
F; F41; F41H; F41H13/00; F41H13/0012; F41H13/0018; F41B; F41B15/00; F41B15/02; F41B15/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A self-defense apparatus to be worn by the user which comprises: a self-contained, high-voltage-producing module securable to a hand of the user; and a finger probe device electrically coupled to said high-voltage-producing module and suitably arranged to be worn on a finger of said hand, said finger probe device including a pair of electrically conductive prongs and a layer of electrical insulating material disposed between said finger and said pair of prongs, said prongs being designed and arranged into a pointed configuration and outwardly protruding from said layer a distance sufficient to enable said prongs to penetrate at least one layer of clothing.
Claim 2
Dependent Claim
103 words
A self-defense apparatus to be worn by the user which comprises: a self-contained, high-voltage-producing module securable to a hand of the user; and a finger probe device electrically coupled to said high-voltage-producing module and suitably arranged to be worn on a finger of said hand, said finger probe device including a pair of electrically conductive prongs and a layer of electrical insulating material disposed between said finger and said pair of prongs, said prongs being designed and arranged into a pointed configuration and outwardly protruding from said layer a distance sufficient to enable said prongs to penetrate at least one layer of clothing.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 wherein with said finger probe device attached to said finger, said two outwardly protruding prongs being disposed adjacent the distal end of said finger.
Claim 4
Dependent Claim
54 words
The apparatus of claim 2 wherein one of said two prongs couples to the hot side of said high-voltage-producing module and the other one of said two prongs couples to the ground side of said high-voltage-producing module, said two prongs capable of carrying and holding a potential difference of at least 1,200 volts D.C.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 wherein said high-voltage-producing module being designed and arranged to provide a potential difference of at least 1,200 volts D.C.
Claim 6
Dependent Claim
28 words
The apparatus of claim 2 wherein said two prongs are substantially parallel to each other and are spaced apart by a distance of between 0.20 and 0.30 inches.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 wherein said high-voltage-producing module being designed and arranged to provide a potential difference of at least 1,200 volts D.C.
Claim 8
Dependent Claim
32 words
The apparatus of claim 6 wherein said high-voltage-producing module comprises: a source of low voltage; a transformer coupled to said source of low voltage; and voltage multiplier means coupled to said transformer.
Claim 9
Dependent Claim
23 words
The apparatus of claim 7 wherein said source of low voltage includes a battery arrangement rated at between 2.5 and 3.5 volts D.C.
Claim 10
Dependent Claim
143 words
A self-defense apparatus to be worn by the user which comprises: a source of high voltage; a cannister of repellant having a spray pushbutton and being suitably arranged to deliver a spray of said repellant in response to depression of said pushbutton; and a finger probe device electrically coupled to said source of high voltage, said finger probe device comprising: means for attaching said finger probe device to a finger; and two electrically conductive, outwardly protruding prongs, said two outwardly protruding prongs being disposed adjacent the distal end of said finger, one of said prongs coupling to the hot side of said source of high voltage and the other one of said two prongs coupling to the ground side of said source of high voltage, said two prongs being capable of carrying and holding a potential difference of at least 1,200 volts D.C.
Claim 11
Dependent Claim
143 words
A self-defense apparatus to be worn by the user which comprises: a source of high voltage; a cannister of repellant having a spray pushbutton and being suitably arranged to deliver a spray of said repellant in response to depression of said pushbutton; and a finger probe device electrically coupled to said source of high voltage, said finger probe device comprising: means for attaching said finger probe device to a finger; and two electrically conductive, outwardly protruding prongs, said two outwardly protruding prongs being disposed adjacent the distal end of said finger, one of said prongs coupling to the hot side of said source of high voltage and the other one of said two prongs coupling to the ground side of said source of high voltage, said two prongs being capable of carrying and holding a potential difference of at least 1,200 volts D.C.
Claim 12
Dependent Claim
77 words
A self-defense apparatus to be worn by the user which comprises: a source of high voltage; a cannister of repellant having a spray pushbutton and being suitably arranged to deliver a spray of said repellant in response to depression of said pushbutton; and a finger probe device electrically coupled to said source of high voltage, said finger probe device comprising: means for attaching said finger probe device to a finger; and two electrically conductive, outwardly protruding prongs.
Claim 13
Dependent Claim
77 words
A self-defense apparatus to be worn by the user which comprises: a source of high voltage; a cannister of repellant having a spray pushbutton and being suitably arranged to deliver a spray of said repellant in response to depression of said pushbutton; and a finger probe device electrically coupled to said source of high voltage, said finger probe device comprising: means for attaching said finger probe device to a finger; and two electrically conductive, outwardly protruding prongs.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |