Patent US4530586A successfully refreshed from Google Patents.
Patent US3598162A successfully refreshed from Google Patents.
US3598162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch interlock
Assignee: Black and Decker Corp
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Filing: 1969-06-09
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Granted: 1971-08-10
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Expires: 1989-06-09
Abstract
Abstract The device disclosed herein is a radial arm saw which includes a base frame having an upstanding column pivoted thereon about a generally vertical axis. A radial arm is rigid with the column and has a saw carriage supported thereon for movement longitudinally thereof. An electric motor driven saw is suspended from the carriage and is adapted to cut workpieces situated on a table supported upon the base frame. The motor is controlled by a switch on the arm, and means is provided to prevent inadvertent or accidental actuation of the switch.
Inventors
- 👤 Francis J Rosenthal Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:01
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/28; H01H9/285; Y; Y10; Y10T; Y10T83/00; Y10T83/081; Y10T83/099; Y10T83/768; Y10T83/7755; Y10T83/7763; Y10T83/7768; Y10T83/7772
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
189 words
A radial arm saw comprising a base frame having an upstanding column pivoted thereon about a generally vertical axis, an arm rigid with said column and extending over a generally horizontal work table on said base frame, a carriage supported for movement along said arm, an electric motor powered saw unit suspended from said carriage for movement therewith, switch means for turning said saw unit ''''on'''' and ''''off,'''' said switch means including a housing on the end of said arm remote from said column, a switch body mounted within said housing, a switch lever pivoTed on said switch body and accessible from outside said housing, said switch lever being movable from an ''''off'''' position to an ''''on'''' position, resiliently biased locking means including a resilient member within said housing and normally in a relatively unstressed condition being positioned in the path of said lever to prevent movement of said lever from said ''''off'''' to said ''''on'''' position, and releasing means manually insertable into said housing from outside thereof to engage and move said resilient member out of its normal position whereby to allow free pivotal movement of said lever.
Claim 2
Dependent Claim
189 words
A radial arm saw comprising a base frame having an upstanding column pivoted thereon about a generally vertical axis, an arm rigid with said column and extending over a generally horizontal work table on said base frame, a carriage supported for movement along said arm, an electric motor powered saw unit suspended from said carriage for movement therewith, switch means for turning said saw unit ''''on'''' and ''''off,'''' said switch means including a housing on the end of said arm remote from said column, a switch body mounted within said housing, a switch lever pivoTed on said switch body and accessible from outside said housing, said switch lever being movable from an ''''off'''' position to an ''''on'''' position, resiliently biased locking means including a resilient member within said housing and normally in a relatively unstressed condition being positioned in the path of said lever to prevent movement of said lever from said ''''off'''' to said ''''on'''' position, and releasing means manually insertable into said housing from outside thereof to engage and move said resilient member out of its normal position whereby to allow free pivotal movement of said lever.
Claim 3
Dependent Claim
45 words
A construction as defined in claim 1 wherein said resilient member comprises a spring strip normally positioned in the path of pivotal movement of said lever, said releasing means being engageable with said resilient member to flex it in a direction out of said path.
Claim 4
Dependent Claim
28 words
A construction as defined in claim 1 which includes cooperable detent means on said releasing means and said housing engageable when said releasing means is in said housing.
Claim 5
Dependent Claim
46 words
A construction as defined in claim 1 wherein said locking means comprises a spring strip secured to said switch body in cantilever fashion, said strip having its free end bent substantially transversely of its length, said bent end being normally in the path of said lever.
Claim 6
Dependent Claim
40 words
A construction as defined in claim 1 wherein said releasing means comprises a key having a cam surface thereon engageable with said resilient member, cooperable detent means on said key and said housing to prevent accidental withdrawal of said key.
Claim 7
Dependent Claim
36 words
A construction as defined in claim 4 wherein said spring strip has a lateral leg portion formed adjacent its free end, said housing having an aperture laterally of said lever for insertion of said releasing means.
Claim 8
Dependent Claim
51 words
A construction as defined in claim 5 wherein said detent means includes a notch and a projection on said key and housing, respectively, said locking means including a member normally biased toward engagement with said key, whereby to retain said notch and projection in engagement and said key in said housing.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |