US3667334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin conductive plate locating system for a punch press
Assignee: Standard Register Co
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Filing: 1970-05-28
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Granted: 1972-06-06
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Expires: 1990-05-28
Abstract
Abstract The invention relates to a system for accurately aligning a thin conductive plate relative to a plurality of punch dies for making holes in the plate which are accurately aligned with respect to one edge. The system employs spaced conductive pins on the plate supporting bed of the machine for guiding the plate into position and for indicating that the plate is in position and ready for punching. The plate position sensing and punch control is performed by an electrical circuit which is completed through the locating pins and the conductive plate. Time delay devices are employed in the control circuit to preclude premature operation of the punch due to accidental completion of the sensing circuit during the initial placement of the plate into the punch. The sensing circuit must be closed for an interval of time before the control circuit automatically initiates punching action.
Inventors
- 👤 Peter Frank Brunett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:35
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/04; B21D43/00; B21D43/003; G; G03; G03F; G03F9/00; Y; Y10; Y10T; Y10T83/00; Y10T83/525; Y10T83/527; Y10T83/528; Y10T83/531; Y10T83/541; Y10T83/544; Y10T83/748; Y10T83/7593; Y10T83/7647; Y10T83/7653; Y10T83/766; Y10T83/869; Y10T83/8765; Y10T83/8768; Y10T83/8821; Y10T83/8841; Y10T83/885
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
459 words
A conductive plate locating and positioning system for a punch press comprising: a supporting bed for a plate to be punched, punching means above said supporting bed, a pair of spaced, aligned primary locating pins on said supporting bed, at least one secondary locating pin on said supporting bed spaced from and on a line parallel to said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of a plate to be punched to align an edge of the plate under said punching means, a first relay means having an energizing coil and normally open contact means, a second relay means having an energizing coil and normally open contact means, said first and second relay means being electrically connected to separate ones of said primary locating pins, a secondary source of electric current connected to the energizing coil of each of said first and second relay means and to said secondary locating pin, said primary and secondary locating pins forming a completed electrical circuit through a conductive plate, said relay means and said secondary source of electric current, a primary source of electric current connected to and serving to energize said secondary source of current, a first time delay relay having an energizing coil and first and second normally open contact means, a second time delay relay, of greater delay time than said first time delay relay and having an energizing coil and normally closed contact means, said contact means of said first and second relay means connected in series with said normally closed contact means, of said second time delay relay, and the energizing coil of said first time delay relay across said primary source of electric current, said contact means of said first and second relay means and said first normally open contact means of said first time delay relay being connected in parallel and in series with the energizing coil of said second time delay relay across said primary source of electric current, an actuating solenoid for said punch means, said second normally open contact means on said first time delay relay being connected in series with said actuating solenoid for said punch means, whereby the completion of the electrical circuit across said secondary source of electric current by a conductive plate causes said first and second relay means to close thereby causing current to pass through said first time delay relay and said secondary time delay relay for a time sufficient to actuatE said first time delay relay and in turn the actuating solenoid for said punch means, the continuing flow of current actuating said secondary time delay relay to break the circuit to said first time delay relay to thereby release said actuating solenoid for said punch means.
Claim 2
Dependent Claim
459 words
A conductive plate locating and positioning system for a punch press comprising: a supporting bed for a plate to be punched, punching means above said supporting bed, a pair of spaced, aligned primary locating pins on said supporting bed, at least one secondary locating pin on said supporting bed spaced from and on a line parallel to said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of a plate to be punched to align an edge of the plate under said punching means, a first relay means having an energizing coil and normally open contact means, a second relay means having an energizing coil and normally open contact means, said first and second relay means being electrically connected to separate ones of said primary locating pins, a secondary source of electric current connected to the energizing coil of each of said first and second relay means and to said secondary locating pin, said primary and secondary locating pins forming a completed electrical circuit through a conductive plate, said relay means and said secondary source of electric current, a primary source of electric current connected to and serving to energize said secondary source of current, a first time delay relay having an energizing coil and first and second normally open contact means, a second time delay relay, of greater delay time than said first time delay relay and having an energizing coil and normally closed contact means, said contact means of said first and second relay means connected in series with said normally closed contact means, of said second time delay relay, and the energizing coil of said first time delay relay across said primary source of electric current, said contact means of said first and second relay means and said first normally open contact means of said first time delay relay being connected in parallel and in series with the energizing coil of said second time delay relay across said primary source of electric current, an actuating solenoid for said punch means, said second normally open contact means on said first time delay relay being connected in series with said actuating solenoid for said punch means, whereby the completion of the electrical circuit across said secondary source of electric current by a conductive plate causes said first and second relay means to close thereby causing current to pass through said first time delay relay and said secondary time delay relay for a time sufficient to actuatE said first time delay relay and in turn the actuating solenoid for said punch means, the continuing flow of current actuating said secondary time delay relay to break the circuit to said first time delay relay to thereby release said actuating solenoid for said punch means.
Claim 3
Dependent Claim
247 words
A workpiece locating device for a machine tool comprising: workpiece locating means for aligning a workpiece within a machine tool relative to a punching means, comprising spaced, aligned primary locating pins and spaced aligned secondary locating pins on the workpiece supporting bed of the machine tool, said secondary locating pins being aligned on a line parallel to and spaced from said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of material to be punched, sensing means electrically connected to said locating means for determining that a workpiece is present in the machine tool and in proper position for having work done thereon, comprising a current sensing means electrically connected to each of the primary locating pins, a power source, and circuit means electrically connecting said primary and secondary locating pins through said sensing means and power source when a conductive workpiece is in contact with said locating pins, and control means for actuating the machine tool when a workpiece is determined by said current sensing means to be present in and in proper position for actuating said punching means, comprising a first and second time delay means, said time delay means being initially energized under the control of said sensing means, said first time delay means bypassing said sensing means and actuating said punching means on completion of its time delay interval, said second time delay means resetting said first time delay means on completion of its time delay interval.
Claim 4
Dependent Claim
247 words
A workpiece locating device for a machine tool comprising: workpiece locating means for aligning a workpiece within a machine tool relative to a punching means, comprising spaced, aligned primary locating pins and spaced aligned secondary locating pins on the workpiece supporting bed of the machine tool, said secondary locating pins being aligned on a line parallel to and spaced from said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of material to be punched, sensing means electrically connected to said locating means for determining that a workpiece is present in the machine tool and in proper position for having work done thereon, comprising a current sensing means electrically connected to each of the primary locating pins, a power source, and circuit means electrically connecting said primary and secondary locating pins through said sensing means and power source when a conductive workpiece is in contact with said locating pins, and control means for actuating the machine tool when a workpiece is determined by said current sensing means to be present in and in proper position for actuating said punching means, comprising a first and second time delay means, said time delay means being initially energized under the control of said sensing means, said first time delay means bypassing said sensing means and actuating said punching means on completion of its time delay interval, said second time delay means resetting said first time delay means on completion of its time delay interval.
Claim 5
Dependent Claim
302 words
A workpiece locating device for a machine tool comprising: workpiece locating means for aligning a workpiece within a machine tool relative to a punching means, comprising spaced, aligned primary locating pins and spaced aligned secondary locating pins on the workpiece supporting bed of the machine tool, said secondary locating pins being aligned on a line parallel to and spaced from said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of material to be punched, said secondary plate locating means being adapted to be removed from electrical contact with said workpiece so as to vary the working location on the workpiece along a line parallel to one edge of said workpiece and wherein said primary and secondary locating pins are electrically isolated from the supporting structure of the machine tool, sensing means electrically connected to said locating means for determining that a workpiece is present in the machine tool and in proper position for having work done thereon, comprising a current sensing means electrically connected to each of the primary locating pins, a power source, and circuit means electrically connecting said primary and secondary locating pins through said sensing means and power source when a conductive workpiece is in contact with said locating pins, and control means for actuating the machine tool when a workpiece is determined by said current sensing means to be present in and in proper position for actuating said punching means, comprising a first and second time delay means, said time delay means being initially energized under the control of said sensing means, said first time delay means bypassing said sensing means and actuating said punching means on completion of its time delay interval, said second time delay means resetting said first time delay means on completion of its time delay interval.
Claim 6
Dependent Claim
302 words
A workpiece locating device for a machine tool comprising: workpiece locating means for aligning a workpiece within a machine tool relative to a punching means, comprising spaced, aligned primary locating pins and spaced aligned secondary locating pins on the workpiece supporting bed of the machine tool, said secondary locating pins being aligned on a line parallel to and spaced from said primary locating pins, said primary and secondary locating pins being positioned to contact adjacent sides of material to be punched, said secondary plate locating means being adapted to be removed from electrical contact with said workpiece so as to vary the working location on the workpiece along a line parallel to one edge of said workpiece and wherein said primary and secondary locating pins are electrically isolated from the supporting structure of the machine tool, sensing means electrically connected to said locating means for determining that a workpiece is present in the machine tool and in proper position for having work done thereon, comprising a current sensing means electrically connected to each of the primary locating pins, a power source, and circuit means electrically connecting said primary and secondary locating pins through said sensing means and power source when a conductive workpiece is in contact with said locating pins, and control means for actuating the machine tool when a workpiece is determined by said current sensing means to be present in and in proper position for actuating said punching means, comprising a first and second time delay means, said time delay means being initially energized under the control of said sensing means, said first time delay means bypassing said sensing means and actuating said punching means on completion of its time delay interval, said second time delay means resetting said first time delay means on completion of its time delay interval.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |