US3619530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doorjamb switch
Assignee: Motors Liquidation Co
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Filing: 1970-04-30
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Granted: 1971-11-09
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Expires: 1990-04-30
Abstract
Abstract A doorjamb switch includes an annular housing comprised of an annular support portion and an annular flexible portion. Interlocking flanges on the portions cooperate to secure the portions to each other and assemble the housing. In one embodiment, the support portion includes an annular contact receptacle which receives a generally planar first contact and a disklike second contact separated by an insulating washer. Upon assembly of the housing, an annular mounting surface of the flexible portion engages the periphery of the first contact and seats the periphery of the second contact of an annular mounting surface of the support portion. The first contact is fixed with respect to the support portion and the periphery of the second contact is slidable between the insulating washer and the surface of the support portion. As mounted, the second contact is concave and has a central projection received within central apertures of the insulating washer and the first contact. The concavity of the second contact biases the central projection into engagement with the first contact to close the switch. A central portion of the flexible portion is engageable by a door during closing movement to flex the central portion and cause it to abut the central projection of the second contact. This increases the concavity of the second contact and moves it out of engagement with the first contact to open the switch. The periphery of the second contact slides between the washer and the surface of the support portion when the concavity of the second contact is increased. An outer protective flange on the flexible portion prevents excessive flexing of the flexible portion and possible damage to the contacts. In another embodiment, a housing includes a flexible portion that acts on peripheral portions of a concave disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a fixed contact.
Inventors
- 👤 Patsy De Vincent
- 👤 Sidney G Dunford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:09
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/04; H01H13/06; H01H13/26; H01H13/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A normally closed switch comprising: a housing including a support portion and a flexible portion; a first contact mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereOf and move the second contact out of central portion of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
Claim 2
Dependent Claim
137 words
A normally closed switch comprising: a housing including a support portion and a flexible portion; a first contact mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereOf and move the second contact out of central portion of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
Claim 3
Dependent Claim
166 words
A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact concentrically mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the central portion of the second contact out of engagement with the first contact thus opening the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
Claim 4
Dependent Claim
166 words
A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact concentrically mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the central portion of the second contact out of engagement with the first contact thus opening the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
Claim 5
Dependent Claim
182 words
A normally closed switch comprising: an annular housing including an annular support portion and an annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted within the housing and fixed with respect to the support portion in a relationship concentric therewith, the first contact having a central aperture therein; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact having a central projection received within the aperture of the first contact and integrally biased by the concavity of the second contact into engagement with the first contact; and a central actuating portion on the flexible portion abutting the central projection of the second contact during flexing of the flexible portion to increase the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the increase of the concavity of the second contact.
Claim 6
Dependent Claim
182 words
A normally closed switch comprising: an annular housing including an annular support portion and an annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted within the housing and fixed with respect to the support portion in a relationship concentric therewith, the first contact having a central aperture therein; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact having a central projection received within the aperture of the first contact and integrally biased by the concavity of the second contact into engagement with the first contact; and a central actuating portion on the flexible portion abutting the central projection of the second contact during flexing of the flexible portion to increase the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the increase of the concavity of the second contact.
Claim 7
Dependent Claim
158 words
A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted on the support portion in a relationship concentric therewith; and a concave disklike second contact having a portion of the periphery thereof slidably mounted within the flexible portion to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof into engagement with the first contact to close the switch, the flexible portion engaging the portion of the periphery of the second contact during flexing of the flexible portion to decrease the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the flexible portion during the decrease of the concavity of the second contact.
Claim 8
Dependent Claim
158 words
A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted on the support portion in a relationship concentric therewith; and a concave disklike second contact having a portion of the periphery thereof slidably mounted within the flexible portion to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof into engagement with the first contact to close the switch, the flexible portion engaging the portion of the periphery of the second contact during flexing of the flexible portion to decrease the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the flexible portion during the decrease of the concavity of the second contact.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |