US3701514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burning table and exhaust system therefor
Assignee: Lukens Inc
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Filing: 1970-11-12
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Granted: 1972-10-31
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Expires: 1990-11-12
Abstract
Abstract The combination of a table for cutting steel plate and an exhaust system for evacuating the fumes and smoke produced by the cutting operation. The expendable grating of the cutting table utilizes bars which are diagonal to the usual cutting directions and are connected by staggered stiffening bars also diagonally located so that the bars are not normally cut along their longitudinal axis. Duct work under the grating comprises heavy vertically extending removable plates resting on edge which additionally provide support for the grating and lead to an elongated exhaust manifold channel having a plurality of openings and a normally closed plate covering each of such openings. The openings are disposed in a horizontal dividing plate and communicate with the space formed between each of the vertically extending plates making up the ductwork under the grating. The cover plates are hinged and raised from a horizontal position by a pneumatic cylinder actuated through a photoelectric cell which is responsive to light from plasma of the cutting torch. The photoelectric cell further actuates adjacent cover plates on either side of the cover plate which corresponds to the duct that the photoelectric cell involved is aligned. Each hinged cover plate has a deep lip soft sealed ring which seats on the peripheral surface of the dividing plate about the corresponding opening and the arrangement is such that the fumes must make a 90* turn prior to entering the opening which slings out heavy particles which then drop to the bottom of the exhaust chamber for easy removal.
Inventors
- 👤 Joseph J Walters
- 👤 Verdun R Mcgibbon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:29
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; B08; B08B; B08B15/00; B23K; B23K7/00; B23K7/002; B08B2215/00; B08B2215/006
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
192 words
A burning table in combination with an exhaust system which comprises exhaust means, a framework including support means for supporting a metal plate, duct means defining a plurality of channels underlying said support means and said metal plate, an exhaust mainfold communicating with said channels and also communicating with said exhaust means, a plurality of valve means which are normally closed disposed between each of said channels and said manifold interrupting flow communication between its respective channel and said manifold when in a closed position, actuating means connected to each of said valve means for opening same, a cutting torch cutting said metal plate generating fumes and electromagnetic radiations in at least one of said channels, a plurality of radiation responsive means, each of said radiation responsive means in communication with one of said channels and receiving radiation caused by said torch in said channel, control means between said radiation responsive means and said actuating means causing the valve means in said corresponding channel to open whereby fumes generated by said cutting torch are drawn from said corresponding channel through said opened valve means into said manifold and to said exhaust means.
Claim 2
Dependent Claim
192 words
A burning table in combination with an exhaust system which comprises exhaust means, a framework including support means for supporting a metal plate, duct means defining a plurality of channels underlying said support means and said metal plate, an exhaust mainfold communicating with said channels and also communicating with said exhaust means, a plurality of valve means which are normally closed disposed between each of said channels and said manifold interrupting flow communication between its respective channel and said manifold when in a closed position, actuating means connected to each of said valve means for opening same, a cutting torch cutting said metal plate generating fumes and electromagnetic radiations in at least one of said channels, a plurality of radiation responsive means, each of said radiation responsive means in communication with one of said channels and receiving radiation caused by said torch in said channel, control means between said radiation responsive means and said actuating means causing the valve means in said corresponding channel to open whereby fumes generated by said cutting torch are drawn from said corresponding channel through said opened valve means into said manifold and to said exhaust means.
Claim 3
Dependent Claim
53 words
A burning table in accordance with claim 1 including further control means between the actuating means of adjacent channels, the valve means in said channels adjacent to the channel receiving radiations from said cutting torch being opened in response to the means opening said valve means in response to said radiation responsive means.
Claim 4
Dependent Claim
42 words
A burning table in accordance with claim 1 wherein said support means comprises a horizontal grating with parallel bars, and said duct means comprises parallel vertically disposed plates, said bars being biased relative to said vertically disposed plates when viewed from above.
Claim 5
Dependent Claim
46 words
A burning table in accordance with claim 1 wherein said support means comprises a grating which includes bars, said grating having a generally rectangular shape when viewed from above, said bars being disposed at a bias to the sides of said grating when viewed from abovE.
Claim 6
Dependent Claim
30 words
A burning table in accordance with claim 1 wherein said duct means comprises parallel vertically disposed plates which are freely removable from said framework when said grating is first removed.
Claim 7
Dependent Claim
19 words
A burning table in accordance with claim 1 wherein each of said radiation responsive means is a photoelectric cell.
Claim 8
Dependent Claim
65 words
The combination of an exhaust system with a burning table which comprises a framework for supporting metal plates, exhaust means exhausting fumes produced by a torch cutting said metal plates, a photoelectric cell responsive to the cutting flame of said torch actuating said exhaust means whereby said exhaust means is started by light radiated from said torch and stopped by the cessation of said light.
Claim 9
Dependent Claim
65 words
The combination of an exhaust system with a burning table which comprises a framework for supporting metal plates, exhaust means exhausting fumes produced by a torch cutting said metal plates, a photoelectric cell responsive to the cutting flame of said torch actuating said exhaust means whereby said exhaust means is started by light radiated from said torch and stopped by the cessation of said light.
Claim 10
Dependent Claim
53 words
A combination in accordance with claim 7 wherein said exhaust means comprises an exhaust fan, a manifold connected to the suction side of said exhaust fan, and a door into said manifold relative to said framework, actuation means provided for opening said door, said actuation means being operatively controlled by said photoelectric cell.
Claim 11
Dependent Claim
57 words
The combination in accordance with claim 8 wherein a plurality of doors are provided leading into said manifold relative to said framework, each of said doors associated with at least one of said actuation means, a plurality of photoelectric cells each of which operatively controls at least the one of said doors through its associated actuation means.
Claim 12
Dependent Claim
33 words
A combination in accordance with claim 9 including control means between the actuating means of adjacent doors whereby each said photoelectric cell operatively controls at least two of said doors which are adjacent.
Claim 13
Dependent Claim
156 words
An expendable grating for a burning table generally utilized for long straight cuts in substantially one direction and other straight cuts in a direction substantially at right angles to said one direction, which comprises a plurality of bars each disposed at a bias to each of said directions, said plurality of bars connected to each other by further bars which are also at a bias to said direction, a cutting torch in combination with the grating, the depth of the grating being shallow relative to the operative length of the flame of said cutting torch whereby when said torch is cutting a plate supported by the grating, the flame extends below the grating, the grating in further combination with exhaust means for exhausting smoke form under said grating, said exhaust means including a photoelectric cell responsive to said flame for actuating said exhaust means when said cutting torch is cutting a plate supported by said grating.
Claim 14
Dependent Claim
156 words
An expendable grating for a burning table generally utilized for long straight cuts in substantially one direction and other straight cuts in a direction substantially at right angles to said one direction, which comprises a plurality of bars each disposed at a bias to each of said directions, said plurality of bars connected to each other by further bars which are also at a bias to said direction, a cutting torch in combination with the grating, the depth of the grating being shallow relative to the operative length of the flame of said cutting torch whereby when said torch is cutting a plate supported by the grating, the flame extends below the grating, the grating in further combination with exhaust means for exhausting smoke form under said grating, said exhaust means including a photoelectric cell responsive to said flame for actuating said exhaust means when said cutting torch is cutting a plate supported by said grating.
Claim 15
Dependent Claim
23 words
An expendable grating in accordance with claim 11 in further combination with supporting means comprising a plurality of vertically disposed metal partition plates.
Claim 16
Dependent Claim
24 words
An expendable grating in accordance with claim 12 wherein said metal partition plates define a plurality of duct means included in said exhaust means.
Claim 17
Dependent Claim
47 words
An expendable grating in accordance with claim 13 wherein said exhaust means includes a said photoelectric cell on each of said duct means and selective means for separately exhausting air and fumes through each of said duct means responsive to said flame therein actuating said photoelectric cell.
Claim 18
Dependent Claim
40 words
An expendable grating in accordance with claim 14 wherein control means is provided operatively to connect selective means of adjacent duct means whereby the duct means adjacent to the duct means receiving said flame are also exhausted of fumes therein.
Claim 19
Dependent Claim
108 words
A burning table in combination with an exhaust system which comprises exhaust means, a framework including support means for supporting a metal plate, duct means defining a plurality of channels underlying said support means and said metal plate, separate exhaust means for exhausting each of said ducts, a cutting torch cutting said metal plate and producing fumes thereunder in at least one of said ducts, and control means responsive to the location of said cutting torch, said control means interconnected to each of said exhAust means and actuating the exhaust means in the duct in which said fumes are received whereby said fumes are exhausted through said duct.
Claim 20
Dependent Claim
108 words
A burning table in combination with an exhaust system which comprises exhaust means, a framework including support means for supporting a metal plate, duct means defining a plurality of channels underlying said support means and said metal plate, separate exhaust means for exhausting each of said ducts, a cutting torch cutting said metal plate and producing fumes thereunder in at least one of said ducts, and control means responsive to the location of said cutting torch, said control means interconnected to each of said exhAust means and actuating the exhaust means in the duct in which said fumes are received whereby said fumes are exhausted through said duct.
Claim 21
Dependent Claim
40 words
A burning table in accordance with claim 16 wherein said control means is also interconnected to the exhaust means in the duct adjacent to the duct in which said fumes are received whereby said adjacent duct is exhausted simultaneously therewith.
Claim 22
Dependent Claim
32 words
A burning table in accordance with claim 16 wherein said control means comprises a photoelectric cell which is responsive to the flame produced by said cutting torch extending below said metal plate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |