Insulation cutter

Apparatus for cutting insulation sheet material or the like, comprising:

• a pivot post,
• a first trammel tube,
• a second trammel tube,
• means for mounting said first trammel tube for radial movement with respect to said pivot post,
• means for retaining said first trammel tube in any one of a plurality of radial positions with respect to said pivot post,
• means for mounting said second trammel tube for radial telescoping movement with respect to said first trammel tube,
• means for maintaining said second trammel tube in any one of a plurality of telescopic positions with respect to said first trammel tube,
• a first cutter wheel mounted on said first trammel tube on a portion thereof remote from said pivot post,
• a second cutter wheel mounted on said second trammel tube on a portion thereof remote from said first trammel tube, and
• means for mounting said second cutter wheel so that it is movable from a first position wherein it is latched in line with said first and second trammel tubes and may make cuts in insulation sheet material or the like extending radially from said pivot post, to a second position wherein it is disposed at 90.degree. with respect to said first position and may make cuts in insulation sheet material or the like that are arcuate, said means for mounting said second cutter wheel including a rod member associated with said second trammel tube, a handle extending upwardly from the top portion of said rod member, and cooperating detent means operatively associated with said rod member and said second trammel tube for providing latching of said second cutter wheel in either said first or said second position thereof, and means providing for vertical movement of said second cutter wheel with respect to said second trammel tube so that said second cutter wheel may be lifted generally out of contact with insulation sheet material or the like to be cut during movement of said cutter wheel from the first position thereof to the second position thereof.