Patent US4000409A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4000409A Expired / Lapsed US ⏱️ 0.0 years remaining

Combination switch lock for a motor vehicle ignition system

Assignee: Individual
•
Filing: 1974-07-22
•
Granted: 1976-12-28
•
Expires: 1994-07-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A combination switch lock for a motor vehicle ignition system, having a multiplicity of switches, a predetermined number of which are in series with the ignition circuit. The ignition circuit is completed only when a series of predetermined switches are closed. A bypass circuit is provided for use during emergencies or when the switches have been tampered with.

Inventors

  • 👤 Michael Graziosi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 21:29
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/20; B60R25/23; B60R25/01; B60R25/04

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 450 words
A combination switch lock device for an ignition system circuit of a motor vehicle comprising: a. a first set of push-button type switches said switches being of the non-indicating type; b. wire members connecting each of said first set of push button type switches in series with one another and connecting a first and a last of said first set of push button type switches to said ignition system circuit, so that said ignition system circuit cannot be completed until each of said first set of push button type switches is closed, said first set of push button type switches being closable in a random manner; c. a second set of push button type switches identical to said first set of push button type switches not connected in said ignition system circuit; d. support means located in said motor vehicle, said first set of push button type switches and said second set of push button type switches mounted on said support means, said first set of push button type switches interspersed with said second set of push button type switches on said support means, so that said first set of push button type switches cannot be readily distinguished from said second set of push button type switches; and e. bypass means for completing said ignition system circuit without having to close said first set of push button type switches including a third set of at least one push button type switch connected in series with said ignition system circuit and parallel to said first set of push button type switches, so that said ignition system circuit may be completed by closing said third set of push button type switches without said first set of push button type switches being closed; f. each of said wire members being provided with an interruption breaking said wire member into a first wire and a second wire, each of said wires being provided with an area adapted to freely conduct electricity whereby said first wire of said wire element connecting said first push button type switch to said ignition system circuit may be brought, in seriatum, into contact with said second wires of said wire members connected to said other push button type switches to bypass each particular individual push button type switch so that it can be determined if said particular push button type switch is in a closed or open position, and once said determination is made, said push button type switch may be put in its proper position, to thereby reset said device when an unknown number of said first set of push button type switches, less than the total number of said switches have been placed in a closed position.
Claim 2
Dependent Claim 450 words
A combination switch lock device for an ignition system circuit of a motor vehicle comprising: a. a first set of push-button type switches said switches being of the non-indicating type; b. wire members connecting each of said first set of push button type switches in series with one another and connecting a first and a last of said first set of push button type switches to said ignition system circuit, so that said ignition system circuit cannot be completed until each of said first set of push button type switches is closed, said first set of push button type switches being closable in a random manner; c. a second set of push button type switches identical to said first set of push button type switches not connected in said ignition system circuit; d. support means located in said motor vehicle, said first set of push button type switches and said second set of push button type switches mounted on said support means, said first set of push button type switches interspersed with said second set of push button type switches on said support means, so that said first set of push button type switches cannot be readily distinguished from said second set of push button type switches; and e. bypass means for completing said ignition system circuit without having to close said first set of push button type switches including a third set of at least one push button type switch connected in series with said ignition system circuit and parallel to said first set of push button type switches, so that said ignition system circuit may be completed by closing said third set of push button type switches without said first set of push button type switches being closed; f. each of said wire members being provided with an interruption breaking said wire member into a first wire and a second wire, each of said wires being provided with an area adapted to freely conduct electricity whereby said first wire of said wire element connecting said first push button type switch to said ignition system circuit may be brought, in seriatum, into contact with said second wires of said wire members connected to said other push button type switches to bypass each particular individual push button type switch so that it can be determined if said particular push button type switch is in a closed or open position, and once said determination is made, said push button type switch may be put in its proper position, to thereby reset said device when an unknown number of said first set of push button type switches, less than the total number of said switches have been placed in a closed position.

References Cited (Backward Citations)

US2162995A Cited
US3611287A Cited
US3754148A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-12-28 1980-06-28 1980-12-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-12-28 1984-06-28 1984-12-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-12-28 1988-06-28 1988-12-28 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag