US3666249A — Slag scavenger for flame burning table

Claim 1

Independent Claim 147 words

Apparatus for removing fallen slag from beneath a flamecutting operation, comprising: a rigid bed of substantial size and thickness upon which the slag falls, two parallel wide-flange beams, bordering the bed, and extending lengthwise of it; a scavenging scoop member positioned perpendicularly to said beams and extending substantially from one to the other of them; and a chain drive assembly associated with each beam, comprising a pair of pulleys, mounted adjacent opposite ends of the associated beam, a chain having one end connected to the leading edge of the scoop, extending thence around both of said pulleys and having its other end engaging the trailing edge of said scoop; and drive mechanism engaging one of the pulleys of each pair and driving the engaged pulleys in synchronism to cause movement of the scoop in one direction or the other while still maintaining it perpendicular to the beams.

Claim 2

Dependent Claim 147 words

Apparatus for removing fallen slag from beneath a flamecutting operation, comprising: a rigid bed of substantial size and thickness upon which the slag falls, two parallel wide-flange beams, bordering the bed, and extending lengthwise of it; a scavenging scoop member positioned perpendicularly to said beams and extending substantially from one to the other of them; and a chain drive assembly associated with each beam, comprising a pair of pulleys, mounted adjacent opposite ends of the associated beam, a chain having one end connected to the leading edge of the scoop, extending thence around both of said pulleys and having its other end engaging the trailing edge of said scoop; and drive mechanism engaging one of the pulleys of each pair and driving the engaged pulleys in synchronism to cause movement of the scoop in one direction or the other while still maintaining it perpendicular to the beams.

Claim 3

Dependent Claim 44 words

Apparatus according to claim 1, wherein the web of each beam extends between runs of its associated chain, and the upper flange of each beam overlies the run of chain which is adjacent the scoop member, to protect it from falling slag and heat.

Claim 4

Dependent Claim 40 words

Apparatus according to claim 1, wherein a slag deflecting plate is positioned above the upper flanges of each of said wide-flange beams, said plates sloping inwardly and downwardly, so as to deflect falling slag into the path of said scoop.

Claim 5

Dependent Claim 44 words

Apparatus according to claim 1, wherein spacer plates are employed in association with the bed and wide-flange beams, for the purpose of ensuring that the upper surface of the bed is coplanar with the upper surface of the lower flanges of the wide-flange beams.

Claim 6

Dependent Claim 46 words

The apparatus of claim 1, in which the connection between the chain and the scoop on each side of the apparatus is independently capable of being lengthened and shortened, to facilitate positioning and maintaining the scoop at right angles to the wide-flange beams during its movement.

Claim 7

Dependent Claim 37 words

The apparatus of claim 5 in which the connections between the ends of each chain and the scoop are capable of adjustment at the leading edge of the scoop independently of the adjustment at the trailing edge.

Claim 8

Dependent Claim 66 words

Apparatus according to claim 1, wherein a slag pit is provided having an opening at substantially the level of the upper surface of the bed, and positioned to receive slag advanced to it by the leading edge of the scoop, a removable grating is mounted above the pit, and a slag pot is positioned within the pit and provideD with hoist-engaging means welded to either side.

Claim 9

Dependent Claim 31 words

Apparatus according to claim 7, wherein the grating is provided with bars configured to aid disintegrating of slag lumps and is positioned at or below the level of the rigid bed.

Claim 10

Dependent Claim 54 words

Apparatus according to claim 1, wherein the wide-flange beams rest upon the rigid bed, and the leading edge of the scoop member extends substantially from web to web of said beams and is cut away at either side for a distance and to an extent appropriate to clear the lower flanges of said beams.

Claim 11

Dependent Claim 140 words

In apparatus for removing slag from beneath a flame-cutting table, said apparatus having a rigid bed to receive fallen slag and a scoop member with means to move it lengthwise of the bed and remove the slag, the combination of a power drive for said scoop-moving means comprising a threaded element which rotates when the power drive is actuated, a contact member engaging the threads of said threaded element and adapted to be moved thereby, a reversing switch and a stop switch in the path of said contact member, a mechanical connection between the scoop-moving means and the power drive means, and electrical connections between the switches named and the drive means so correlated as to effect actuation of a selected switch by said contact member when the mechanical connection has traversed a predetermined range of movement in either direction.

Claim 12

Dependent Claim 140 words

In apparatus for removing slag from beneath a flame-cutting table, said apparatus having a rigid bed to receive fallen slag and a scoop member with means to move it lengthwise of the bed and remove the slag, the combination of a power drive for said scoop-moving means comprising a threaded element which rotates when the power drive is actuated, a contact member engaging the threads of said threaded element and adapted to be moved thereby, a reversing switch and a stop switch in the path of said contact member, a mechanical connection between the scoop-moving means and the power drive means, and electrical connections between the switches named and the drive means so correlated as to effect actuation of a selected switch by said contact member when the mechanical connection has traversed a predetermined range of movement in either direction.

Claim 13

Dependent Claim 142 words

Apparatus for removing fallen slag from beneath a flame-cutting operation, comprising: a rigid bed member extending lengthwise of the apparatus, a pair of wide-flange beams bordering the bed member along two parallel sides, drive chains mounted for movement beneath the upper flanges of the respective beams, a transversely extending scoop connected to the said drive chains and substantially spanning the distance between the webs of said beams; power means for simultaneously actuating the drive chains and connected to a threaded element to cause rotation thereof; a stop switch and a reversing switch and a switch actuator mounted on the threaded element and movable thereby between said switches; the threaded element being adapted to operate the switch actuator through one cycle of its movement in the same time interval as is occupied by movement of the scoop through one cycle of its movement.

Claim 14

Dependent Claim 142 words

Apparatus for removing fallen slag from beneath a flame-cutting operation, comprising: a rigid bed member extending lengthwise of the apparatus, a pair of wide-flange beams bordering the bed member along two parallel sides, drive chains mounted for movement beneath the upper flanges of the respective beams, a transversely extending scoop connected to the said drive chains and substantially spanning the distance between the webs of said beams; power means for simultaneously actuating the drive chains and connected to a threaded element to cause rotation thereof; a stop switch and a reversing switch and a switch actuator mounted on the threaded element and movable thereby between said switches; the threaded element being adapted to operate the switch actuator through one cycle of its movement in the same time interval as is occupied by movement of the scoop through one cycle of its movement.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-05-30	1975-11-29	1976-05-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-05-30	1979-11-29	1980-05-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-05-30	1983-11-29	1984-05-30	$7700.00	Window Closed / Lapsed

Slag scavenger for flame burning table

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