Device for temperature-responsive adjustment of the measuring points of two machine tool parts

A device for the temperature-responsive adjustment of the measuring points of two relatively movable machine tool parts, said device comprising:

• rule means mounted for limited longitudinal movement on a first machine part;
• a scanning head mounted on a second machine part;
• at least one thermally sensitive element mounted to said first machine part in such a way as to be thermally responsive to that portion of said first machine part that is particularly subject to being heated, said thermally sensitive element comprising a rod transversely mounted in a bore in said first machine part and having a free end extending externally of said first machine parts;
• and
• a reversing drive for coupling said thermally sensitive element to said rule means to longitudinally adjust the zero position of said rule means in response to thermally caused positional changes in said thermally sensitive element, said reversing drive being configured as a linkage mechanism including an angle lever having one arm thereon in contact with said free end of said rod and a second arm coupled to said rule mean.

A device for the temperature-responsive adjustment of the measuring points of two relatively movable machine tool parts, said device comprising:

• rule means mounted by means of leaf spring means for limited longitudinal movement on a first machine part;
• a scanning head mounted on a second machine part;
• at least one thermally sensitive element mounted to said first machine part in such a way as to be thermally responsive to that portion of said first machine part that is particularly subject to being heated;
• and
• means for coupling said thermally sensitive element to said rule means to longitudinally adjust the zero position of said rule means in response to thermally caused positional changes in said thermally sensitive element.

A device for the temperature-responsive adjustment of the measuring points of two relatively movable machine tool parts, said device comprising:

• rule means mounted for limited longitudinal movement on a first machine part;
• a scanning head mounted on a second machine part;
• at least one thermally sensitive element mounted to said first machine part in such a way as to be thermally responsive to that portion of said first machine part that is particularly subject to being heated, said thermally sensitive element comprising a rod transversely mounted in a bore in said first machine part and having a free end extending externally of said first machine part;
• and
• a reversing drive for coupling said thermally sensitive element to said rule means to longitudinally adjust the zero position of said rule means in response to thermally caused positional changes in said thermally sensitive element, said reversing drive being configured as a bevelled surface formed on said free end of said rod and a cooperating bevelled surface formed on a slide element, said slide element being slidably mounted on said first machine part and having means for engaging said rule means.