US3886441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adapter for coupling a measuring instrument to an electrical ignition system
Assignee: Siemens AG
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Filing: 1973-07-06
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Granted: 1975-05-27
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Expires: 1993-07-06
Abstract
Abstract An electrical adapter apparatus for coupling an electronic measuring instrument to the ignition system of an internal combustion engine. The adapter comprises an ohmic voltage divider consisting of two resistors coupled in series, and an electrically conductive annular ring disposed about and spaced apart from one of the resistors which forms a compensation capacitance in combination with one of the resistors of the voltage divider.
Inventors
- 👤 Hans-Werner Kranz
- 👤 Herbert Lucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:48
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02; F02P17/04; F02P17/08; F02P17/12; F02P2017/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
An electrical adapter apparatus for coupling an electronic measuring instrument to the ignition system of an internal combustion engine, comprising: an ohmic voltage divider, including a pair of resistors coupled in series for dividing a voltage signal; an electrically conductive member comprising an annular ring, disposed about and spaced apart from one of said resistors of said voltage divider, and coupled in series to both of said resistors of said divider; electrically conductive contact members, coupled to said voltage divider resistors and said conductive member, for transmitting a signal representative of the ignition voltage to the electronic measuring instrument; a conductive base member coupled to said one of said voltage divider resistors and to one of said contact members; an electrically conductive bridge member coupled to said annular ring and said base member; a conductive plate member having a curved end portion disposed adjacent said annular ring and said resistors and coupled to the other one of said contact members; and a curved shield member, mounted on said plate member adjacent said voltage divider resistors.
Claim 2
Dependent Claim
175 words
An electrical adapter apparatus for coupling an electronic measuring instrument to the ignition system of an internal combustion engine, comprising: an ohmic voltage divider, including a pair of resistors coupled in series for dividing a voltage signal; an electrically conductive member comprising an annular ring, disposed about and spaced apart from one of said resistors of said voltage divider, and coupled in series to both of said resistors of said divider; electrically conductive contact members, coupled to said voltage divider resistors and said conductive member, for transmitting a signal representative of the ignition voltage to the electronic measuring instrument; a conductive base member coupled to said one of said voltage divider resistors and to one of said contact members; an electrically conductive bridge member coupled to said annular ring and said base member; a conductive plate member having a curved end portion disposed adjacent said annular ring and said resistors and coupled to the other one of said contact members; and a curved shield member, mounted on said plate member adjacent said voltage divider resistors.
Claim 3
Dependent Claim
252 words
An electrical adapter apparatus for coupling an electronic measuring instrument to the ignition system of an internal combustion engine, comprising: an ohmic voltage divider, including a pair of resistors coupled in series for dividing a voltage signal; an electrically conductive annular ring disposed about and spaced apart from one of said resistors of said voltage divider, and coupled in series between both of said resistors of said divider so as to lie in the current path therebetween; an electrically conductive contact member, coupled to said annular ring and said one of said resistors, for transmitting a reduced ignition voltage input signal to the electronic measuring instrument; another electrically conductive contact member coupled to the other one of said voltage divider resistors for transmitting said voltage input signal to the electronic measuring instrument; said conductive ring further comprising a conductive base member coupled to said one of said voltage divider resistors and to one of said contact members, an electrically conductive bridge member coupled to said annular ring and said base member, a conductive plate member having a curved end portion disposed adjacent said annular ring and said resistors and coupled to the other one of said contact members, and a curved shield member, mounted on said plate member adjacent said voltage divider resistors; and a case constructed of electrical insulation material disposed about said one of said voltage divider resistors, including an annular slot disposed therein for receiving said annular ring and said other one of said resistors of said voltage divider.
Claim 4
Dependent Claim
252 words
An electrical adapter apparatus for coupling an electronic measuring instrument to the ignition system of an internal combustion engine, comprising: an ohmic voltage divider, including a pair of resistors coupled in series for dividing a voltage signal; an electrically conductive annular ring disposed about and spaced apart from one of said resistors of said voltage divider, and coupled in series between both of said resistors of said divider so as to lie in the current path therebetween; an electrically conductive contact member, coupled to said annular ring and said one of said resistors, for transmitting a reduced ignition voltage input signal to the electronic measuring instrument; another electrically conductive contact member coupled to the other one of said voltage divider resistors for transmitting said voltage input signal to the electronic measuring instrument; said conductive ring further comprising a conductive base member coupled to said one of said voltage divider resistors and to one of said contact members, an electrically conductive bridge member coupled to said annular ring and said base member, a conductive plate member having a curved end portion disposed adjacent said annular ring and said resistors and coupled to the other one of said contact members, and a curved shield member, mounted on said plate member adjacent said voltage divider resistors; and a case constructed of electrical insulation material disposed about said one of said voltage divider resistors, including an annular slot disposed therein for receiving said annular ring and said other one of said resistors of said voltage divider.
Claim 5
Dependent Claim
26 words
The apparatus as recited in claim 2, further comprising an outer protective covering, constructed of electrical insulation material, disposed on the outer surface of said case.
References Cited (Backward Citations)
US2613345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |