US4956635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing personal barriers
Assignee: Langdon Enterprises Inc
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Filing: 1989-04-14
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Granted: 1990-09-11
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Expires: 2009-04-14
Abstract
Abstract The method and apparatus for testing a personal barrier such as a medical glove comprises establishing a reference circuit through the body of an individual wearing the personal barrier. An electrical lead is connected with a saline solution or the body of the patient. The defective personal barrier is indentified through the establishment of an external circuit through the practitioner and the test solution or the patient. An alarm is sounded to alert the wearer to the defective condition. The detection is preferably accomplished by means of sensing the resistance of the external circuits.
Inventors
- 👤 Robert S. Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:26
CPC Classifications
G; G08; G08B; G08B21/00; G01; G01M; G01M3/00; G01M3/40; A; A61; A61B; A61B42/00; A61B42/30; G01M3/02; G01M3/04; G01M3/16
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
165 words
A method for testing the integrity of a personal barrier worn by a human such as a health professional and the like comprising: (a) establishing a reference external electrical circuit connecting two regions of said human; (b) continuously verifying the existence of said reference electrical circuit; (c) generating a status signal indicative of said existence; (d) monitoring the status signal; (e) applying a personal barrier to the said human; (f) establishing electrical communication between a body and a test point; (g) determining whether a further external electrical circuit, indicating lack of the integrity of the personal barrier, is formed between at least one of said two regions of said human and said test point through said body and said personal barrier when only said personal barrier is in contact with said body; and (h) generating an alarm signal indicative of the existence of said further external electrical circuit between said human and said test point and of said lack of integrity of the personal barrier.
Claim 2
Independent Claim
165 words
A method for testing the integrity of a personal barrier worn by a human such as a health professional and the like comprising: (a) establishing a reference external electrical circuit connecting two regions of said human; (b) continuously verifying the existence of said reference electrical circuit; (c) generating a status signal indicative of said existence; (d) monitoring the status signal; (e) applying a personal barrier to the said human; (f) establishing electrical communication between a body and a test point; (g) determining whether a further external electrical circuit, indicating lack of the integrity of the personal barrier, is formed between at least one of said two regions of said human and said test point through said body and said personal barrier when only said personal barrier is in contact with said body; and (h) generating an alarm signal indicative of the existence of said further external electrical circuit between said human and said test point and of said lack of integrity of the personal barrier.
Claim 3
Dependent Claim
16 words
The testing method of claim 1 wherein said alarm signal comprises both visual and acoustical signals.
Claim 4
Dependent Claim
18 words
The testing method of claim 1 wherein step (a) comprises the human stepping on electrically conductive mat means.
Claim 5
Dependent Claim
17 words
The testing method of claim 1 wherein step (c) further comprises intermittently illuminating a light emitting diode.
Claim 6
Dependent Claim
45 words
The testing method of claim 1 wherein said body comprises a saline solution and step (g) comprises inserting the personal barrier at least partially in said solution to determine whether an electrical circuit is formed between said human and said solution transgressing the personal barrier.
Claim 7
Dependent Claim
18 words
The testing method of claim 1 wherein said body of step (f) is the body of a patient.
Claim 8
Dependent Claim
25 words
The testing method of claim 1 wherein step (b) comprises determining whether the external resistance of said reference external current lies within a pre-established range.
Claim 9
Dependent Claim
26 words
The testing method of claim 1 wherein step (g) comprises determining whether the external resistance of said further external electrical circuit lies within a preestablished range.
Claim 10
Dependent Claim
152 words
Apparatus for testing the integrity of a personal barrier worn by a human comprising: reference circuit means comprising first and second terminal means for establishing a reference external circuit traversing a portion of a human between said first and second terminal means; test circuit means comprising third terminal means for establishing a test external circuit between said first and third terminal means; verification means for continuously verifying the presence of the reference external circuit; status signal means responsive to said verification means for signaling the verification of said reference external circuit; detection means for detecting the existence of a conductive path connecting said first terminal and said third terminal through the human and the personal barrier thereby indicating a lack of integrity of the personal barrier; and alarm means responsive to said detection means for signaling the existence of said conductive path and the lack of the integrity of the personal barrier.
Claim 11
Dependent Claim
152 words
Apparatus for testing the integrity of a personal barrier worn by a human comprising: reference circuit means comprising first and second terminal means for establishing a reference external circuit traversing a portion of a human between said first and second terminal means; test circuit means comprising third terminal means for establishing a test external circuit between said first and third terminal means; verification means for continuously verifying the presence of the reference external circuit; status signal means responsive to said verification means for signaling the verification of said reference external circuit; detection means for detecting the existence of a conductive path connecting said first terminal and said third terminal through the human and the personal barrier thereby indicating a lack of integrity of the personal barrier; and alarm means responsive to said detection means for signaling the existence of said conductive path and the lack of the integrity of the personal barrier.
Claim 12
Dependent Claim
31 words
The test apparatus of claim 9 further comprising means for sensing the resistance of said reference external circuit and comparator means for comparing the reference resistance to a pre-established resistance range.
Claim 13
Dependent Claim
16 words
The test apparatus of claim 9 wherein said status signal means comprises a light emitting diode.
Claim 14
Dependent Claim
28 words
The test apparatus of claim 9 further comprising means for sensing the resistance of said conductive path and comparator means for comparing the resistance to a pre-established range.
Claim 15
Dependent Claim
18 words
The test apparatus of claim 9 wherein said alarm means comprises an acoustical alarm and a visual indicator.
Claim 16
Dependent Claim
26 words
The test apparatus of claim 9 further comprising electrically conductive mat means for establishing electrical communication between said human and said first and second terminal means.
Claim 17
Dependent Claim
130 words
The test apparatus of claim 9 wherein the test circuit means comprises: a support stand including a platform being at least in part conductive; basin means being supported on said platform for containing a conductive solution, said basin means having a conductive portion which establishes a current path between said platform and the solution when contained therein to form said third terminal; drape means attached to said basin means about the periphery thereof, said drape means extending substantially entirely about the portions of said stand disposed below said platform; and means for sensing for the presence of a path of electrical current flow between said platform and said human wearing said personal barrier when said personal barrier is at least partly immersed in the solution contained in said basin means.
Claim 18
Dependent Claim
42 words
The apparatus of claim 15 wherein said means for sensing includes: mat means positioned adjacent said stand and including at least an electrically conductive portion; and means for establishing an electrical contact between said human and said mat means electrically conductive portion.
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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |