US4720764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operator static grounding cord
Assignee: Alden Products Co Inc
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Filing: 1987-03-02
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Granted: 1988-01-19
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Expires: 2007-03-02
Abstract
Abstract Apparatus for draining the static charge from an operator handling discharge-sensitive electronic components has an electrode module applied to the operator's wrist connected to a grounding module by a two conductor loop which includes a lamp, a battery and a switch which, when closed, lights the lamp if one of the conductors is continuous between the electrode and grounding terminal.
Inventors
- 👤 Derek A. Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
106 words
Electrical apparatus for draining a static charge from an operator to an electical ground comprising: an electrode for electrical connection to the operator's body; a terminal for connection to ground; and a circuit connected between the electrode and ground terminal, wherein the circuit includes: a battery, switching means a current indicator, and first and second conductors connected between the electrode and ground terminal and forming a loop including the battery, switching means and indicator in series such that closing of the switching means completes a current path through both conductors and the indicator signals integrity of the connection from the body electrode to the ground terminal.
Claim 2
Dependent Claim
106 words
Electrical apparatus for draining a static charge from an operator to an electical ground comprising: an electrode for electrical connection to the operator's body; a terminal for connection to ground; and a circuit connected between the electrode and ground terminal, wherein the circuit includes: a battery, switching means a current indicator, and first and second conductors connected between the electrode and ground terminal and forming a loop including the battery, switching means and indicator in series such that closing of the switching means completes a current path through both conductors and the indicator signals integrity of the connection from the body electrode to the ground terminal.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1 wherein the loop passes through the ground terminal.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 1 wherein the switching means is a manual switch.
Claim 5
Dependent Claim
12 words
Apparatus according to claim 1 wherein the switching means is normally open.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 1 wherein the switch is at the ground terminal end of the conductors.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 1 wherein the current indicator is a light emitter.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 1 wherein the indicator is at the electrode end of the conductors.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 1 including a first insulative jacket around a part of the body electrode.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 8 wherein the indicator is in the first jacket.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 9 including a second jacket around a part of the ground terminal.
Claim 12
Dependent Claim
14 words
Apparatus according to claim 10 wherein the switching means is in the second jacket.
Claim 13
Dependent Claim
13 words
Apparatus according to claim 10 wherein the battery is in the second jacket.
Claim 14
Dependent Claim
16 words
Apparatus according to claim 1 including an insulative jacket around a part of the ground terminal.
Claim 15
Dependent Claim
12 words
Apparatus according to claim 13 wherein switching means is in the jacket.
Claim 16
Dependent Claim
12 words
Apparatus according to claim 13 wherein the battery is in the jacket.
Claim 17
Dependent Claim
18 words
Apparatus according to claim 1 wherein one conductor is continuous from the body electrode to the ground terminal.
Claim 18
Dependent Claim
19 words
Apparatus according to claim 16 wherein the other conductor is isolated from the ground terminal by the switching means.
References Cited (Backward Citations)
US4605984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |