Debris receiving trough

Claim 2

A trough, means for attaching the trough to and supporting it from edge of a drafting table and means for extending the length of the trough comprising interfitting channel members, a rib formed integrally with the bottom of one said channel member and a grove on another of said members slidably receiving said rib whereby the channel members may be moved relative to each other to vary the overall length of the trough and the rib and groove guide their relative motion, reinforce the members and lend lateral stability to the trough.

Claim 3

The structure of claim 1 in which the means for attaching and supporting the trough comprises a plurality of brackets, each bracket having an end wall, a back wall, a front wall and a bottom defining a pocket in which an end of the trough is received.

Claim 4

The structure of claim 2 in which the bottom of at least one of said brackets has a tongue adapted to be attached to the underside of a drafting table.

Claim 5

The structure of claim 1 in which the means for attaching the trough to and supporting it from a drafting table comprises a plurality of brackets each of said brackets having a bottom, the bottom of some of said brackets having having a groove defined therein for receiving said rib and groove projecting from the bottom of said trough.

Claim 6

A trough adjustable in length comprising interfitted channel members, each having a back wall adapted to be mounted against the edge of a table, a bottom wall, and means on the bottom wall interfitted with mating means on the contiguous bottom wall of the other channel member to guide the axial adjustment of said channels and provide lateral stability to the trough, and a front wall spaced from said back wall having an extension which extends above the plane in which the top of the back wall lies, said extension preventing objects brushed from the table over flying the trough and means for attaching the trough to a table.

Claim 7

A trough adjustable in length comprising interfitted channel members, each having a back wall adapted to be mounted against the edge of a table, a bottom wall, and means on the bottom wall interfitted with mating means on the contiguous bottom wall of the other channel member to guide the axial adjustment of said channels and provide lateral stability to the trough, and a front wall spaced from said back wall having an extension which extends above the plane in which the top of the back wall lies, said extension preventing objects brushed from the table over flying the trough and means for attaching the trough to a table.

Claim 8

The trough defined in claim 5 in which the means for attaching said trough to a table comprises brackets adapted to be spaced along the length of the trough and means for securing said brackets to a table.

Claim 9

The structure of claim 5 in which said trough is open at its ends and the means for attaching the trough to a table comprises a plurality of brackets, at least two of which are positioned at the ends of the trough and include means for closing the respective ends of the trough.

Claim 10

The structure of claim 7 in which each of the brackets adapted to be positioned at the open ends of the trough comprises an end wall adapted to close the respective end of the trough, a back wall, a front wall and a bottom, said walls and bottom defining a pocket for receiving the end of a trough.