US3889503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety indicator system and method for metal forming machines
Assignee: Allied Products Corp
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Filing: 1974-07-01
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Granted: 1975-06-17
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Expires: 1994-07-01
Abstract
Abstract The specification discloses the operation of a multistate safety indicator on a press device having a plurality of run switches. Circuitry is provided for placing the indicator in an on state when the press is ready to be energized. Circuitry is responsive to actuation of one of the run switches for placing the indicator in an intermittent flashing state for a predetermined timed interval. Circuitry is responsive to the actuation of the remainder of the run switches during the predetermined time interval for placing the indicator in the on state to indicate operation of the press. Circuitry is also provided to place the indicator in the off state if the remainder of the run switches are not actuated during the predetermined time interval.
Inventors
- 👤 Kurt K Luenser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:45
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/18; F16P3/20; B; B21; B21D; B21D55/00; F16P7/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
96 words
A safety system for a press having a plurality of start switches comprising: indicator means having first, second and third states, means for placing said indicator means in said first state when the press is ready to be energized, means responsive to actuation of one of the start switches for placing said indicator means in said second state for a predetermined time interval, and means responsive to the actuation of the remainder of the start switches during said predetermined time interval for placing said indicator means in said first state to indicate operation of the press.
Claim 2
Dependent Claim
96 words
A safety system for a press having a plurality of start switches comprising: indicator means having first, second and third states, means for placing said indicator means in said first state when the press is ready to be energized, means responsive to actuation of one of the start switches for placing said indicator means in said second state for a predetermined time interval, and means responsive to the actuation of the remainder of the start switches during said predetermined time interval for placing said indicator means in said first state to indicate operation of the press.
Claim 3
Dependent Claim
21 words
The safety system of claim 1 wherein each of said start switches comprises two run switches which must be concurrently actuated.
Claim 4
Dependent Claim
33 words
The safety system of claim 1 and further comprising: means for placing said indicator in said third state if the remainder of the start switches are not actuated during said predetermined time interval.
Claim 5
Dependent Claim
31 words
The safety system of claim 3 and further comprising: means for switching said indicator means from said third state to said first state when all of said start switches are de-energized.
Claim 6
Dependent Claim
12 words
The safety system of claim 3 wherein said indicator comprises a lamp.
Claim 7
Dependent Claim
31 words
The safety system of claim 5 wherein said first state comprises a continuously energized mode, said second state comprises an intermittent flashing mode and said third state comprises a de-energized mode.
Claim 8
Dependent Claim
92 words
A safety system for a press having a plurality of run switches comprising: a visual indicator having on, intermittent and off states, means for placing said indicator in said on state when the press is ready to be energized, means responsive to the actuation of one of the run switches for placing said indicator in said intermittent state for a predetermined time interval, means responsive to the concurrent actuation of said run switches during said predetermined time interval for placing said indicator in said on state to indicate energization of the press.
Claim 9
Dependent Claim
92 words
A safety system for a press having a plurality of run switches comprising: a visual indicator having on, intermittent and off states, means for placing said indicator in said on state when the press is ready to be energized, means responsive to the actuation of one of the run switches for placing said indicator in said intermittent state for a predetermined time interval, means responsive to the concurrent actuation of said run switches during said predetermined time interval for placing said indicator in said on state to indicate energization of the press.
Claim 10
Dependent Claim
31 words
The safety system of claim 7 and further comprising: means for placing said indicator in said off state if said run switches are not concurrently actuated during said predetermined time interval.
Claim 11
Dependent Claim
17 words
The safety system of claim 7 wherein the press is de-energized by the application of a brake.
Claim 12
Dependent Claim
24 words
The safety system of claim 7 wherein each of said run switches comprise Two run buttons which must be simultaneously operated by an operator.
Claim 13
Dependent Claim
30 words
The safety system of claim 7 and further comprising: means for changing said indicator from said off state to said on state when all of said run switches are de-energized.
Claim 14
Dependent Claim
23 words
The safety system of claim 7 and further comprising a plurality of said visual indicators operable in parallel for a plurality of operators.
Claim 15
Dependent Claim
25 words
The safety system of claim 7 and further comprising: a timing circuit which is energized in response to actuation of one of said run switches.
Claim 16
Dependent Claim
16 words
The safety system of claim 13 wherein said timing circuit comprises a solid state electronic timer.
Claim 17
Dependent Claim
33 words
The safety system of claim 13 and further comprising: a relay connected to monitor the operation of said timing circuit, said relay preventing operation of said system upon malfunction of said timing circuit.
Claim 18
Dependent Claim
28 words
The safety system of claim 13 and further comprising: a solid state flasher which is connected to said visual indicator when one of said run switches is actuated.
Claim 19
Independent Claim
85 words
The method of operating a multistate safety indicator on a press having a plurality of run switches comprising: continuously energizing the indicator to indicate that the press is ready for operation, intermittently energizing the indicator for a predetermined time interval after one of the run switches is actuated, continuously energizing the indicator if all of the run switches are concurrently actuated during said predetermined time interval, and de-energizing the indicator if all of the run switches are not concurrently actuated during said predetermined time interval.
Claim 20
Independent Claim
85 words
The method of operating a multistate safety indicator on a press having a plurality of run switches comprising: continuously energizing the indicator to indicate that the press is ready for operation, intermittently energizing the indicator for a predetermined time interval after one of the run switches is actuated, continuously energizing the indicator if all of the run switches are concurrently actuated during said predetermined time interval, and de-energizing the indicator if all of the run switches are not concurrently actuated during said predetermined time interval.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |