US3725625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical pushbutton switch with pointed end coil spring contact
Assignee: Raytheon Co
•
Filing: 1971-08-25
•
Granted: 1973-04-03
•
Expires: 1991-08-25
Abstract
Abstract A switch, particularly useful as a keyboard switch, which comprises a casing containing two or more free-standing coil contacts and a longitudinally movable switch bar carrying a shorting plate which when depressed engages adjacent ends of the coil contacts to close an electrical circuit therebetween.
Inventors
- 👤 A Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:32
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/242; H01H13/00; H01H13/02; H01H13/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A switch comprising a casing having a single central chamber, an actuator movable within the chamber and having a portion extending through a wall of the casing, at least two contacts disposed in spaced relation entirely within the chamber adjacent said actuator, one end portion of said contacts being immovably affixed to the casing, support means extending through the casing for individually connecting said one end portion of the contacts to external electrical circuitry, and conductive means on said actuator disposed to engage the opposite ends of said contacts when the actuator is moved, the abutting ends of the contacts and the adjacent surface of said conductive means being provided with means for preventing said ends of the contacts from sliding laterally in any direction along said surface of the conductive means.
Claim 2
Dependent Claim
132 words
A switch comprising a casing having a single central chamber, an actuator movable within the chamber and having a portion extending through a wall of the casing, at least two contacts disposed in spaced relation entirely within the chamber adjacent said actuator, one end portion of said contacts being immovably affixed to the casing, support means extending through the casing for individually connecting said one end portion of the contacts to external electrical circuitry, and conductive means on said actuator disposed to engage the opposite ends of said contacts when the actuator is moved, the abutting ends of the contacts and the adjacent surface of said conductive means being provided with means for preventing said ends of the contacts from sliding laterally in any direction along said surface of the conductive means.
Claim 3
Dependent Claim
43 words
A switch as set forth in claim 4 wherein said surface is irregular in texture, and said contacts each comprises a coiled compression spring, with one end thereof being relatively sharp for nonsliding engagement with said irregular adjacent surface of the conductive means.
Claim 4
Dependent Claim
179 words
A switch comprising a casing having a single central chamber, a switch bar within the chamber and extending through the casing, spring means within the casing adjacent one end of the bar for yieldably urging the bar in a direction outwardly of the casing, at least two elongated contacts disposed in spaced relation within the chamber adjacent and substantially parallel to said bar, a contact plate carried by said bar and extending radially therefrom in spaced overlying relation to said contacts, said contacts each comprising a coiled compression spring located entirely within the chamber and having one end rigidly fixed to the casing, conductive means extending through the casing for connecting the springs to external electrical circuitry, said bar being movable longitudinally against said spring means for positioning said contact plate in engagement with the adjacent ends of said compression springs, the abutting ends of said compression springs and the adjacEnt surface of said contact plate being provided with means for preventing said ends of the springs from sliding laterally in any direction along said surface of the plate.
Claim 5
Dependent Claim
179 words
A switch comprising a casing having a single central chamber, a switch bar within the chamber and extending through the casing, spring means within the casing adjacent one end of the bar for yieldably urging the bar in a direction outwardly of the casing, at least two elongated contacts disposed in spaced relation within the chamber adjacent and substantially parallel to said bar, a contact plate carried by said bar and extending radially therefrom in spaced overlying relation to said contacts, said contacts each comprising a coiled compression spring located entirely within the chamber and having one end rigidly fixed to the casing, conductive means extending through the casing for connecting the springs to external electrical circuitry, said bar being movable longitudinally against said spring means for positioning said contact plate in engagement with the adjacent ends of said compression springs, the abutting ends of said compression springs and the adjacEnt surface of said contact plate being provided with means for preventing said ends of the springs from sliding laterally in any direction along said surface of the plate.
References Cited (Backward Citations)
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |