Patent US3737591A successfully refreshed from Google Patents.
US3737591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trap switch with elongated mounting wire for completing continuity circuit
Assignee: Alarm Products International Inc
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Filing: 1971-10-27
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Granted: 1973-06-05
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Expires: 1991-10-27
Abstract
Abstract A trap switch for a burglar alarm system consists of a base member adapted to be mounted on a fixed body and a movable member adapted to be connected to a movable member by an elongated flexible wire. The base member has a pair of fixed contacts biased toward one another with an access slot in the base member housing disposed in a region between the fixed contacts. The movable member has an extending insulation stab portion carrying insulated conductive surfaces on its opposite sides. The extending stab can be pressed between the fixed contacts of the base member and each contact engages one of the conducting stab surfaces. An extending wire is mechanically connected at its ends to the conductive surfaces. A continuity circuit is connected in series with the fixed contacts, and can be either normally open or normally closed depending on whether the elongated wire is conductively connected between the conductive surfaces.
Inventors
- 👤 P Parlato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:28
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/08; H01H9/085; H01R; H01R13/00; H01R13/66; H01R13/70; H01R13/703
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
292 words
A trap switch for a burglar alarm system; said trap switch comprising a first switch member including a first closed housing and a second switch member including a second closed housing; said first switch member including mounting means for mounting said first switch member to a first body; said second switch member including means for mechanically connecting said second switch member to a second body whicH is relatively movable with respect to said first body; said first switch member including a first pair of spaced contact members which face one another; respective terminal means connected with each of said first pair of contact members and disposed within said first closed housing; an opening in one wall of said first closed housing; said opening disposed adjacent to the area which includes said first pair of spaced contact members; said second switch member including a second pair of spaced contact members secured to said second switch member; respective terminal means connected with each of said second pair of spaced contact members and disposed within said second closed housing; an opening in one wall of said second closed housing; said second pair of spaced contact members extending through said opening in said second closed housing; an insulation member disposed between said second pair of contact members; said insulation member and said second pair of contact members defining a projecting stab; said projecting stab extending through said opening in one wall of said first closed housing and between said first pair of spaced contact members, with said first pair of contact members respectively engaging said second pair of contact members; said one wall of said first housing being disposed over said one wall of said second housing, thereby to cover the said openings in said housings.
Claim 2
Dependent Claim
292 words
A trap switch for a burglar alarm system; said trap switch comprising a first switch member including a first closed housing and a second switch member including a second closed housing; said first switch member including mounting means for mounting said first switch member to a first body; said second switch member including means for mechanically connecting said second switch member to a second body whicH is relatively movable with respect to said first body; said first switch member including a first pair of spaced contact members which face one another; respective terminal means connected with each of said first pair of contact members and disposed within said first closed housing; an opening in one wall of said first closed housing; said opening disposed adjacent to the area which includes said first pair of spaced contact members; said second switch member including a second pair of spaced contact members secured to said second switch member; respective terminal means connected with each of said second pair of spaced contact members and disposed within said second closed housing; an opening in one wall of said second closed housing; said second pair of spaced contact members extending through said opening in said second closed housing; an insulation member disposed between said second pair of contact members; said insulation member and said second pair of contact members defining a projecting stab; said projecting stab extending through said opening in one wall of said first closed housing and between said first pair of spaced contact members, with said first pair of contact members respectively engaging said second pair of contact members; said one wall of said first housing being disposed over said one wall of said second housing, thereby to cover the said openings in said housings.
Claim 3
Dependent Claim
74 words
The trap switch of claim 1 wherein said first pair of contact members are spring biased normally to engage one another, and wherein said second pair of contact members are removable to define insulation surfaces for said stab, whereby a circuit is closed between said terminal means of said first pair of contact members only when said second switch member is moved to retract said stab from between said first pair of contact members.
Claim 4
Dependent Claim
30 words
The trap switch of claim 2 wherein said first pair of contact members are elastically deformable to a condition in which they are normally engaged when said stab is removed.
Claim 5
Dependent Claim
101 words
The trap switch of claim 1 wherein said first pair of contact members are spring biased normally to be out of contact with respect to one another, and which includes conductor means connected between said terminal means of said second pair of contact members for electrically connecting said second pair of contact members, whereby, when said stab is in said position between said first pair of contact members, there is a closed circuit between said terminal means of said first pair of contact members, and whereby removal of said stab by movement of said second switch member opens said closed circuit.
Claim 6
Dependent Claim
38 words
The trap switch of claim 4 wherein said first pair of contact members of a contact spring material is deformable to a condition wherein said first pair of contact members are normally out of engagement with one another.
Claim 7
Dependent Claim
38 words
The trap switch of claim 4 wherein said means for mechanically connecting said second switch member includes a wire having its ends at least mechanically connected respectively to said terminal means of said second pair of contact members.
Claim 8
Dependent Claim
15 words
The trap switch of claim 6, wherein said wire is at least partly insulation covered.
Claim 9
Dependent Claim
21 words
The trap switch of claim 1 wherein said means for mounting said first switch member is disposed within said first housing.
Claim 10
Dependent Claim
38 words
The trap switch of claim 1 wherein said means for mechanically connecting said second switch member includes a wire having its ends at least mechanically connected respectively to said terminal means of said second pair of contact members.
Claim 11
Dependent Claim
21 words
The trap switch of claim 1, further comprising means electrically connecting said terminal means for said second pair of contact members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |