Patent US3535409A successfully refreshed from Google Patents.
US3596243A
Expired / Lapsed
US
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Two-unit antitheft device
Assignee: Analytics Inc
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Filing: 1969-03-28
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Granted: 1971-07-27
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Expires: 1989-03-28
Abstract
Abstract An electronic anti-theft device for an automobile including a dashboard unit and an engine compartment unit. The dashboard unit is equipped with a combination lock mechanism which in the undialed position is operative to short out both the automobile ignition coil and the distributor. The dashboard unit also includes an armored cable which houses a folded over ignition wire and wires from both the distributor and ignition coil. The engine compartment unit includes three separate but related embodiments, each of which includes means for enabling the automobile horn to provide an audible alarm as long as the combination lock is not correctly dialed or an attempt is made to disable the dashboard unit and to steal the automobile.
Inventors
- 👤 Stephen W Leibholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:40
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/01; B60R25/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
295 words
A two-unit antitheft device for an automobile comprising: a. first means connected to the dashboard of said automobile for housing one of said two antitheft units; b. an ignition lead folded over on itself to form a U-shaped member and having one end thereof connected to the ignitionaccessory switch of said automobile and the other end thereof extending into said first means and connected to a junction point; c. first impedance means connected between said junction point and a first contact; d. an ignition coil wire; e. a distributor wire, said ignition coil wire and said distributor wire extending from the automobile ignition coil and distributor respectively, into said first means and connected together therein to a second contact; f. an armored cable secured to said first means for housing said ignition lead and said ignition coil and distributor wires; g. switch means including a grounded switch arm pivotally connected to and within said first means for movement between said first and said second contacts, whereby said ignition coil wire and said distributor wire are connected to ground through said switch arm when said switch arm is contacting said second contact and said ignition coil wire and said distributor wire are connection to an open terminal when said switch arm is contacting said first contact; h. a combination lock mounted on the face of said first means and operatively connected to move said switch arm to said first contact when the correct combination of said lock is dialed; and i. second means positioned within the engine compartment of said automobile for housing a second of said two-unit antitheft units, said second means operatively connected to the ignitionaccessory switch of said automobile and said first contact for providing an enabling signal to an alarm-producing utilization device.
Claim 2
Dependent Claim
295 words
A two-unit antitheft device for an automobile comprising: a. first means connected to the dashboard of said automobile for housing one of said two antitheft units; b. an ignition lead folded over on itself to form a U-shaped member and having one end thereof connected to the ignitionaccessory switch of said automobile and the other end thereof extending into said first means and connected to a junction point; c. first impedance means connected between said junction point and a first contact; d. an ignition coil wire; e. a distributor wire, said ignition coil wire and said distributor wire extending from the automobile ignition coil and distributor respectively, into said first means and connected together therein to a second contact; f. an armored cable secured to said first means for housing said ignition lead and said ignition coil and distributor wires; g. switch means including a grounded switch arm pivotally connected to and within said first means for movement between said first and said second contacts, whereby said ignition coil wire and said distributor wire are connected to ground through said switch arm when said switch arm is contacting said second contact and said ignition coil wire and said distributor wire are connection to an open terminal when said switch arm is contacting said first contact; h. a combination lock mounted on the face of said first means and operatively connected to move said switch arm to said first contact when the correct combination of said lock is dialed; and i. second means positioned within the engine compartment of said automobile for housing a second of said two-unit antitheft units, said second means operatively connected to the ignitionaccessory switch of said automobile and said first contact for providing an enabling signal to an alarm-producing utilization device.
Claim 3
Dependent Claim
42 words
A two-unit antitheft device according to claim 1 wherein said second unit provides said enabling signal to said utilization device responsive to the closure of said automobile ignition-accessory switch and only when said switch arm is in communication with said second contact.
Claim 4
Dependent Claim
89 words
A two-unit antitheft device according to claim 1 wherein said first means further comprises: a. a cam follower connected between said lock and switch arm for moving said arm responsive to the dialed condition of said lOck; b. an indicator lamp connected to said first contact for lighting said lock when said ignition-accessory switch is closed and said first contact is open; and c. unidirectional impedance means connected to said second contact and said second unit for preventing said second unit from receiving electrical energy from said first means.
Claim 5
Dependent Claim
58 words
A two-unit antitheft device according to claim 2 wherein said second unit comprises: a. second impedance means connected between said ignition-accessory switch and said first contact; and b. time delay relay means operatively connected to said first contact and said second impedance means for providing said enabling signal a predetermined time after the closure of said ignition-accessory switch.
Claim 6
Dependent Claim
90 words
A two-unit antitheft device according to claim 2 wherein said second unit comprises: a. an electric switch having a control electrode; b. a voltage divider connected to said ignition-accessory switch and said control electrode for providing a control signal thereto; c. a time delay connected to said electronic switch for providing said enabling signal a predetermined time after said electronic switch receives said control signal; and d. means connected to said electronic switch for prohibiting the passage of said enabling signal when the combination of said lock is correctly dialed.
Claim 7
Dependent Claim
55 words
A two-unit antitheft device according to claim 5 wherein said electronic switch comprises a silicone-controlled rectifier and said voltage divider comprises a first and second resistor, said first resistor connected to said ignition-accessory switch and the control electrode of said rectifier and said second resistor connected to ground and the control electrode of said rectifier.
Claim 8
Dependent Claim
59 words
A two-unit antitheft device according to claim 2 wherein said second unit comprises: a. a electronic switch having a control electrode; and b. second impedance means connected to said control electrode and a voltage source of said automobile, said electronic switch providing said enabling signal upon the occurrence of a predetermined voltage being developed across said second impedance means.
Claim 9
Dependent Claim
30 words
A two-unit antitheft device according to claim 7 wherein said electronic switch comprises a transistor having the emitter thereof grounded and the collector thereof connected to provide said enabling signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |