B - Operations – Transporting – 43 – L
Patent
B - Operations, Transporting
43
L
33/26
B43L 9/00 (2006.01) B43L 7/12 (2006.01) B43L 11/00 (2006.01)
Patent
CA 1265673
25455-13 ABSTRACT A drawing instrument incorporates two substantially planar members each formed with a straight guide edge and mechanism connecting the members to permit them to rotate relatively to one another in parallel planes about an axis located in the vicinity of one end of each guide edge from one extreme position in which the guide edges lie toghether to another extreme position in which the guide edges are collinear. The mechanism connecting the members comprises a curved connecting piece in permanent sliding and interlocking engagement with curved channels in said two members the arrangement providing that there is no obstruction between the guide edges along their entire length irrespective of their immediate relative angular positions. The drawing instrument may include frictional damping mechanism comprising resilient tabs presented by the slide member and arranged to bear frictionally against respective planar members. The tabs may be arranged to abut against projections on the respective planar members when the planar members are in the position in which their guide edges lie together.
523402
Fetherstonhaugh & Co.
Scott Alastair George
LandOfFree
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