Line square

Claim 2

A line square for laying out structures from a taut guide line positioned adjacent the area to be laid out, comprising a yoke supporting said guide line in vertically extending relation, a tripod secured to said yoke for supporting said yoke thereon, a sight positioned adjacent said guide line and extending angularly thereto, a support connected to said sight and having means for engaging said guide line to align said sight with said guide line, and means on said support for holding said support in snug engagement with said guide line for sliding movement therealong.

Claim 3

A device as claimed in claim 1 including a vertically adjustable stop collar on said line for supporting said line square.

Claim 4

A device as claimed in claim 1 including a pair of transverse levels secured to said yoke for vertically aligning said line.

Claim 5

A line square for laying out structures from a taut guide line positioned adjacent the area to be laid out, comprising a sight positioned adjacent said guide line and extending angularly thereto, an elongated channel support for said sight having means for engaging said guide line to align said support with said guide line, means on said support for holding said support in snug engagement with said guide line for sliding movement therealong, a removable and replaceable circular alignment plate seated on the upper Surface of said channel support, means for positioning said alignment plate on said channel support such that its center overlies said guide line when said engaging means are in contact with said line, and means for securing said sight to said alignment plate and said channel support at a desired angular orientation with respect to said guide line including a plurality of V-grooves extending diametrically across the upper face of the alignment plate and angularly related to each other and a bar adjustably secured in one of said V-grooves for securement to said sight.

Claim 6

A line square for laying out structures from a taut guide line positioned adjacent the area to be laid out, comprising a sight positioned adjacent said guide line and extending angularly thereto, an elongated channel support for said sight having means for engaging said guide line to align said support with said guide line, means on said support for holding said support in snug engagement with said guide line for sliding movement therealong, a removable and replaceable circular alignment plate seated on the upper Surface of said channel support, means for positioning said alignment plate on said channel support such that its center overlies said guide line when said engaging means are in contact with said line, and means for securing said sight to said alignment plate and said channel support at a desired angular orientation with respect to said guide line including a plurality of V-grooves extending diametrically across the upper face of the alignment plate and angularly related to each other and a bar adjustably secured in one of said V-grooves for securement to said sight.

Claim 7

A device as claimed in claim 4, wherein said bar is a tube having a central depending screw which passes through a central bore in said alignment plate and a bore in said elongated channel support, said tube having a rectangular member integrally secured to the upper surface thereof, and means is provided for clamping a telescopic sight to said rectangular member.

Claim 8

A device as claimed in claim 4, wherein said elongated channel support is provided at each end with a pair of downwardly disposed legs aligned transversely of said channel member with an opening therebetween, said means for engaging the guide line comprising bearing members seated in said openings between each pair of legs and each being formed to provide an inverted V-shaped notch for receiving the guide line in underlying alignment with the axis of the channel support.

Claim 9

A device as claimed in claim 6, wherein said legs each terminates at its lower end in an outwardly projecting foot portion having a horizontal bottom surface for supporting the sight on a flat surface away from said guide line.

Claim 10

A device as claimed in claim 6 wherein said means on said support for holding said support in snug engagement with said line includes a pair of coil spring members detachably secured to opposite ends of said support for engaging beneath said guide line and urging said line towards said means for engaging said guide line.

Claim 11

A device as claimed in claim 6 wherein an L-shaped hook opening is formed in one leg of each of said pairs of legs on one side of said line to engage said line and support said square when out of use.

Claim 12

A line square for laying out structures from a taut guide line positioned adjacent the area to be laid out, comprising a sight positioned adjacent said guide line and extending angularly thereto, an elongated channel support for said sight having means for engaging said guide line to align said support with said guide line, means on said support for holding said support in snug engagement with said guide line for sliding movement therealong, a removable and replaceable circular alignment plate seated on the upper surface of said channel support, means for positioning said alignment plate on said channel support such that its center overlies said guide line when said engaging means are in contact with said line, and means for securing said sight to said alignment plate and said channel support at a desired angular orientation with respect to said guide line, said means for securing the sight to said circular alignment plate and channel support including a plurality of V-grooves extending diametrically across the upper face of the alignment plate and angularly related to each other and, an externally threaded cylindrical member having a dependent axial bolt and a plurality of dependent dogs and being mounted on said alignment plate, said axial bolt passing through a central bore in said alignment plate and a bore in said elongated channel support, and said dogs engaging in one of said V-grooves, and said sight being a surveyor''s transit which is threaded onto said cylindrical member.

Claim 13

A line square for laying out structures from a taut guide line positioned adjacent the area to be laid out, comprising a sight positioned adjacent said guide line and extending angularly thereto, an elongated channel support for said sight having means for engaging said guide line to align said support with said guide line, means on said support for holding said support in snug engagement with said guide line for sliding movement therealong, a removable and replaceable circular alignment plate seated on the upper surface of said channel support, means for positioning said alignment plate on said channel support such that its center overlies said guide line when said engaging means are in contact with said line, and means for securing said sight to said alignment plate and said channel support at a desired angular orientation with respect to said guide line, said means for securing the sight to said circular alignment plate and channel support including a plurality of V-grooves extending diametrically across the upper face of the alignment plate and angularly related to each other and, an externally threaded cylindrical member having a dependent axial bolt and a plurality of dependent dogs and being mounted on said alignment plate, said axial bolt passing through a central bore in said alignment plate and a bore in said elongated channel support, and said dogs engaging in one of said V-grooves, and said sight being a surveyor''s transit which is threaded onto said cylindrical member.