US4005362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit continuity tester
Assignee: Individual
•
Filing: 1976-01-26
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Granted: 1977-01-25
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Expires: 1996-01-26
Abstract
Abstract An electrical circuit continuity tester is described having a minimum number of components and including only a bulb, a cylindrical tube, batteries, a spring and 2 contacts which also serve as probes. One contact grips the bulb, affording mechanical and electrical contact between it and the battery while it simultaneously retains all the components in relative position. The other contact is needle shaped and is designed to minimize possible inadvertent shorts. For assurance against the continuity tester disassembling in storage or use, a simple bulb cover locks the bulb gripping contact, and hence the entire assembly, in position.
Inventors
- 👤 Samuel S. Fortino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R31/00; G01R31/50; G01R31/52; G01R31/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
An electrical circuit continuity tester of the battery employing type comprising: a cylindrical tube of insulating material dimensioned radially and longitudinally to receive at least one standard battery; a needle contact mounted in and extending from one end of said cylindrical tube forming a first probe; a longitudinal slit communicating with the other end of said cylindrical tube and running longitudinally therefrom for a predetermined distance, said slit including at the closed end thereof a circumferential communicating portion; a bulb having cylindrical and button electrodes; a cylindrical-electrode clip circumferentially embracing at least 180° of the bulb arc electrode and including integral therewith a second probe, dimensioned to protrude through said longitudinal slit portion sliding longitudinally thereof and through said circumferential slit portion rotating circumferentially thereof, locking said bulb in position; a spring for normally urging bulb-battery-probe contact.
Claim 2
Dependent Claim
137 words
An electrical circuit continuity tester of the battery employing type comprising: a cylindrical tube of insulating material dimensioned radially and longitudinally to receive at least one standard battery; a needle contact mounted in and extending from one end of said cylindrical tube forming a first probe; a longitudinal slit communicating with the other end of said cylindrical tube and running longitudinally therefrom for a predetermined distance, said slit including at the closed end thereof a circumferential communicating portion; a bulb having cylindrical and button electrodes; a cylindrical-electrode clip circumferentially embracing at least 180° of the bulb arc electrode and including integral therewith a second probe, dimensioned to protrude through said longitudinal slit portion sliding longitudinally thereof and through said circumferential slit portion rotating circumferentially thereof, locking said bulb in position; a spring for normally urging bulb-battery-probe contact.
Claim 3
Dependent Claim
56 words
The electrical circuit continuity tester claimed in claim 1 further comprising a cup-shaped bulb cover, the cylindrical portion of said cover being dimensioned to compressively slide over the cylindrical tube end including said bulb reducing the dimensions of said longitudinal slit portion thereby preventing retrograde of said clip and locking said clip and bulb in position.
Claim 4
Dependent Claim
59 words
The electrical circuit continuity tester claimed in claim 2 wherein said needle contact is pin shaped including head and needle portions, the head portion being contained within the ends of said cylindrical tube; a pressure fit insulating connector dimensioned to mechanically couple said head portion to cylindrical tube and having an aperture through which the needle end thereof protrudes.
Claim 5
Dependent Claim
34 words
The electrical circuit continuity tester claimed in claim 3 in which said pressure fit insulating connector includes a flange of greater dimension than the diameter of said cylindrical tube for preventing total insertion thereof.
Claim 6
Dependent Claim
75 words
The electrical circuit continuity tester claimed in claim 4 where the head of said pin shaped needle contact comprises two spaced flanges, one at the extreme end of said pin for providing a contact with a battery button, said pressure fit insulating connector including a pair of resilient detents for locking said connector on said head between said flanges; said detents further including surface roughening for securely grasping the inside surface of said cylindrical tube.
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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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |