Bar jointing

In a segmented bar having a longitudinal axis, a first bar section slidably interengageable with a second bar section under longitudinal axial displacement to move into and out of end to end abutting interlocking mating relation, each of said bar sections presenting mating longitudinally extending surface formations on opposite sides thereof and mating longitudinally extending edge formations along opposite edges thereof, each bar section terminating in an abutting end edge formation to be presented to the abutting end edge formation of the other of said bar sections when disposed in interlocking mating relation, the opposed surface formations of one of said sections each including a locating recess therein offset in relation to the other locating recess, each locating recess opening both longitudinally and laterally from adjacent portions of its said abutting end edge formation and to an opposed one of said mating longitudinally extending edge formations respectively and with said opposed offset locating recesses overlapping centrally of their respective surface formations, the opposed surface formations of the other of said section each including a mating projection for each locating recess offset in relation to each other and likewise overlapping centrally of its said opposed surface formations with each mating projection likewise bounded both longitudinally and laterally by adjacent portions of its said abutting end edge formation and an opposed one of said longitudinally extending mating edge formations said opposed offset locating recesses and mating projections being slidably interengageable in at least one longitudinal axial orientation thereof for longitudinal displacement of said bar sections into and out of end to end abutting interlocking mating relation.

In a segmented saw bar having a longitudinal axis a first main bar section slidably interengageable with a second nose bar section under longitudinal axial displacement to move into and out of end to end abutting interlocking mating relation, each of said saw bar sections presenting mating longitudinally extending surface formations on opposite sides and mating longitudinally extending edge formations along opposite edges, each bar section terminating in an abutting end edge formation to be presented to the abutting end edge formation of the other of said bar sections when disposed in interlocking mating relation, said nose bar section presenting a curvate edge formation of selected curvature along the end thereof remote from its said abutting end edge formation which curvate edge formation merges respectively uniformly with its longitudinally extending opposed edge formations, the mating surface formations of said bar section each including a shallow locating recess therein and offset in relation to the other said locating recess and each bounded by and merging with adjacent portions of its abutting end edge formation and an opposed one of its said mating longitudinally extending edge formations, and opening both longitudinally and laterally respectively therealong, the mating surface formations of said nose bar section each including a mating projection for each locating recess likewise offset in relation to each other and each bounded by adjacent portions of its abutting end edge formation and an opposed one of its longitudinally extending mating edge formations, said locating recesses and mating projections being slidably interengageable in at least one longitudinal axial orientation thereof for longitudinal displacement into and out of abutting interlocking mating relation, said opposed longitudinally extending mating edge formations and curvate edge formation respectively each including a centrally located groove formation therewithin presenting substantially uniformly spaced apart rail formations outermost therealong, whereby said bar sections when disposed in end to end abutting interlocking mating relation present a composite pair of rail formations extending therearound, with the portions of said abutting end edge formations presented by said pair of rail formations being offset longitudinally to one another.