US3631447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety alarm
Assignee: Hudson Tool and Die Co Inc
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Filing: 1969-07-11
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Granted: 1971-12-28
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Expires: 1989-07-11
Abstract
Abstract A safety alarm for machines having an ''''automatic'''' mode of operation comprising a pair of timers actuated by manually operable switches, the said timers connected in series to prevent the machine from converting to the ''''automatic'''' mode of operation until both have timed-out and requiring the uninterrupted manual actuation of said switches during the period of timeout, and audible alarm means energized continuously while the machine is set for ''''automatic'''' mode of operation, the said alarm means being deenergized when both timers have timed out.
Inventors
- 👤 Raymond J Sulat
- 👤 Moses W Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. at least one timing means operatively connected with means for energizing automatic mode of operation of apparatus, b. manually operable means for energizing the timing means, the timing means timing out only if the said manually operable means are actuated uninterruptedly for a significant period of time, c. the timing means converting the apparatus to automatic mode of operation only when aLl said timing means have timed out.
Claim 2
Dependent Claim
83 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. at least one timing means operatively connected with means for energizing automatic mode of operation of apparatus, b. manually operable means for energizing the timing means, the timing means timing out only if the said manually operable means are actuated uninterruptedly for a significant period of time, c. the timing means converting the apparatus to automatic mode of operation only when aLl said timing means have timed out.
Claim 3
Dependent Claim
69 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 1 and b. alarm means operatively connected to both the timing means and means for energizing automatic mode of operation of the apparatus, c. the alarm means being energized when the apparatus is programmed for automatic mode of operation and deenergized only when the timing means time out.
Claim 4
Dependent Claim
49 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 1 in which b. there are at least a pair of manually operable means spaced apart sufficiently that each said means must be actuated by a separate hand.
Claim 5
Dependent Claim
45 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 1 in which b. the timing means is an electrically actuated timer converted in series with the means for energizing automatic mode of operation.
Claim 6
Dependent Claim
45 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 2 in which b. the timing means is an electrically actuated timer connected in series with the means for energizing automatic mode of operation.
Claim 7
Dependent Claim
90 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 1 in which b. there are at least two timing means operatively connected with the means for energizing automatic mode of operation of the apparatus, c. each of the timing means timing out only if the manually operable means are actuated uninterruptedly for a significant period of time, d. the timing means converting the apparatus to automatic mode of operation only when all said timing means have timed out.
Claim 8
Dependent Claim
69 words
A safety alarm for apparatus having selectable manual and automatic modes of operation comprising a. the structure in accordance with claim 6 and b. alarm means connected to both the timing means and the means for energizing automatic mode of operation of the apparatus c. the alarm means being energized when the apparatus is programmed for automatic mode of operation and deenergized only when the timing means time out.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |