US3636485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security alarm system
Assignee: Individual
•
Filing: 1969-02-10
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Granted: 1972-01-18
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Expires: 1989-02-10
Abstract
Abstract A security alarm system for protecting restricted access areas against entry by unauthorized personnel. A switch operated by the opening of a gate or door in a wall surrounding the protected area causes a diaphragm-type horn to be operated by means of a solid-state control circuit connected between the switch and the horn. Connected in the circuit is a magnetically operated disarming switch which may be turned to a number of positions. This switch is placed on the inside of a window in the wall so that authorized personnel may through the use of a magnet and by visual reference to indicia on the face of the switch position the switch so as to disarm the system and gain access to the area without operating the horn.
Inventors
- 👤 Paul Weathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:59
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/1003; G; G08; G08B; G08B13/00; G08B13/02; G08B13/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
294 words
In an electrical switch apparatus useful in restricted access security systems comprising the combination of: magnetically responsive switch means comprising at least two movable coacting electrical contact members which part from and touch one another in response to the magnitude of magnetic flux passing through said switch means along a specified line intersecting said switch means to establish said switch means in either a first electrically open condition or a second electrically closed condition; support means carrying said switch means; a permanently magnetized member having at least one substantially planar surface with the lines of magnetic force emanating therefrom initially extending from said surface in a direction substantially normal thereto, the flux pattern produced by said lines of magnetic force having at least one substantially straight line discontinuity therein along which line a specified magnitude of magnetic flux is defined, said discontinuity being characterized by the lines of magnetic force which emanate from said surface on one side of said discontinuity extending in a direction of magnetic flux flow which is opposite to the direction of magnetic flux flow characteristic of the lines of magnetic force which emanate from said surface on the other side of said discontinuity; and means mechanically coupled to said support means and said magnetized member for positioning said magnetized member adjacent and in movable spaced relationship to said switch means to permit the selective orientation of said straight line discontinuity in alignment with said specified line intersecting said switch means, the magnitude of magnetic flux defined by said discontinuity along said specified line being of a value which changes the condition of said switch means between said first and second condition when said discontinuity is moved into and out of alignment with said specified line intersecting said switch means.
Claim 2
Dependent Claim
294 words
In an electrical switch apparatus useful in restricted access security systems comprising the combination of: magnetically responsive switch means comprising at least two movable coacting electrical contact members which part from and touch one another in response to the magnitude of magnetic flux passing through said switch means along a specified line intersecting said switch means to establish said switch means in either a first electrically open condition or a second electrically closed condition; support means carrying said switch means; a permanently magnetized member having at least one substantially planar surface with the lines of magnetic force emanating therefrom initially extending from said surface in a direction substantially normal thereto, the flux pattern produced by said lines of magnetic force having at least one substantially straight line discontinuity therein along which line a specified magnitude of magnetic flux is defined, said discontinuity being characterized by the lines of magnetic force which emanate from said surface on one side of said discontinuity extending in a direction of magnetic flux flow which is opposite to the direction of magnetic flux flow characteristic of the lines of magnetic force which emanate from said surface on the other side of said discontinuity; and means mechanically coupled to said support means and said magnetized member for positioning said magnetized member adjacent and in movable spaced relationship to said switch means to permit the selective orientation of said straight line discontinuity in alignment with said specified line intersecting said switch means, the magnitude of magnetic flux defined by said discontinuity along said specified line being of a value which changes the condition of said switch means between said first and second condition when said discontinuity is moved into and out of alignment with said specified line intersecting said switch means.
Claim 3
Dependent Claim
116 words
Apparatus according to claim 1 wherein said magnetized member comprises a relatively flat circular disk having two substantially planar opposing surfaces and wherein said means for positioning said magnetized member comprises a first bearing meaNs positioned at the axis of circular rotation of said disk and a second bearing means carried by said support means cooperating with said first bearing means for permitting rotation of said magnetized member relative to said switch means in close juxtaposition thereto and wherein the flux patterns of the magnetic lines of force emanating from both surfaces of said disk are substantially identical in character such that the substantially straight lined discontinuity in each flux pattern lies in a common plane.
Claim 4
Dependent Claim
43 words
Apparatus according to claim 2 wherein there is additionally provided at least one body of low remnance magnetically permeable material held by said support means in close juxtaposition to said switch means at a position along said specified line intersecting said switch means.
Claim 5
Dependent Claim
156 words
Apparatus according to claim 2 wherein there is additionally provided a manually manipulatable means for producing a magnetic field having a flux pattern with at least one substantially straight line discontinuity therein of a character substantially identical to the discontinuity in the flux pattern produced by the magnetic lines of force emanating from either surface of said magnetized member, said magnetic field being of sufficient magnitude to produce a magnetic rotational force upon said magnetized member to produce rotation thereof when said manipulatable means is placed adjacent said magnetized member but spaced apart therefrom by a distance less than 120 times greater than the spacing between said magnetized member and said switch means whereby through manipulation of said manipulatable means the discontinuities in the flux patterns produced by said magnetized member and said manipulatable means coact to permit manually directed changes to be made in the position of said magnetized member relative to said switch means.
Claim 6
Dependent Claim
122 words
Apparatus according to claim 2 wherein said support means comprises a receptacle having a front, a rear and a sidewall member and wherein said switch means is fixedly positioned adjacent said rear wall member and said magnetized member is positioned intermediate said switch means and said front wall member and wherein the outer surface of said front wall member bears visual indicia so positioned thereon as to aid a human being in defining predetermined sectors of a circle and wherein at least the front wall member of said receptacle comprises a material having relatively low magnetic permeability and wherein the thickness of the front wall member is no greater than 120 times the distance between said switch means and said magnetized member.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |