Elevation setting mechanism for a table saw and the like

In an elevation setting mechanism for a motor-driven tool in a power tool apparatus which comprises a housing including a tabletop having an opening through which the tool can pass, assembly means pivotally mounted in the housing about an axis parallel to the working axis of the tool the assembly means including frame means and subassembly means pivotally mounted in the frame means and which include the tool the mechanism including first control means having a control lever operatively connected to the subassembly means for pivoting same, whereby the tool is raised or lowered in the opening to a desired elevation with respect to the tabletop in a quick and coarse setting manner, and locking means for securing the control lever to the frame means at a position corresponding to the desired coarse elevation setting for the tool, and

• second control means operatively connected to the subassembly means for pivoting the subassembly means independently of said control lever,
• said second control means providing a further elevation adjustment of the tool, the improvement to the second control means comprising:
• a pivot nut pivotally mounted to the subassembly means, said pivot nut having a threaded opening at right angles to its pivot axis in the subassembly means;
• a connecting rod having a threaded end disposed in said threaded opening;
• means for restraining axial movement of said rod towards or away from the pivot axis of said pivot nut;
• and
• means for rotating said connecting rod such that said threaded end moves axially in said threaded opening, whereby the subassembly means rotates about its pivotal mounting in the frame means in response to the rotation of said connecting rod, to provide the further elevation adjustment of the tool.

In an elevation setting mechanism for a motor-driven tool in a power tool apparatus which comprises a housing including a tabletop having an opening through which the tool can pass, a first subassembly which includes the tool, pivotally mounted in the housing about a pivot axis, a second subassembly pivotally mounted in the housing, about said pivot axis, the mechanism including a control lever operatively connected to the second subassembly for pivoting same, about said pivot axis and means connecting the first subassembly to the second subassembly, whereby the first and second subassemblies pivot about the said pivot axis in unison such that the tool is raised or lowered in the opening to a desired elevation with respect to the tabletop, in a quick and coarse setting manner, the second subassembly further including locking means for securing the second subassembly at a position corresponding to the desired coarse elevation setting for the tool and second control means operatively connected to the first subassembly for pivoting the first subassembly about said pivot axis independently of the rotational movement thereof due to its connection with the second subassembly, said second control means providing a further elevation adjustment of the tool, the improvement to the second control means comprising:

• a pivot nut pivotally mounted to the first subassembly, said pivot nut having a threaded opening at right angles to its pivot axis in the first subassembly;
• a connecting rod having a threaded end disposed in said threaded opening;
• means for restraining axial movement of said rod towards or away from the pivot axis of said pivot nut;
• and
• means for rotating said connecting rod such that said threaded end moves axially in said threaded opening, whereby the first subassembly means pivots about said first mentioned pivot axis in response to the rotation of said connecting rod, to provide the further elevation adjustment of the tool.

In an elevation setting mechanism for a motor-driven tool in a power tool apparatus which comprises a housing including a tabletop having an opening through which the tool can pass, assembly means pivotally mounted in the housing about a first axis the assembly means including frame means, a first subassembly including the tool pivotally mounted in the frame means about a second pivot axis, a second subassembly pivotally mounted about the second pivot axis, the mechanism including a control lever operatively connected to the second subassembly for pivoting same, about said second pivot axis and means connecting the first subassembly to the second subassembly, whereby the first subassembly pivots about the second pivot axis in unison with the second subassembly, such that the tool is raised or lowered in the opening to a desired elevation with respect to the tabletop, in a quick and coarse setting manner, the second subassembly further including locking means for securing the second subassembly at a position corresponding to the desired coarse elevation setting for the tool, and second control means operatively connected to the first subassembly for pivoting the first subassembly about the second pivot axis independently of the pivotal movement thereof due to its connection with the second subassembly, said second control means providing a further elevation adjustment of the tool, the improvement to the second control means comprising:

• a pivot nut pivotally mounted to the first subassembly, said pivot nut having a threaded opening perpendicular to its pivot axis in the first subassembly;
• a connecting rod having a threaded end disposed in said threaded opening;
• means for restraining axial movement of said rod towards or away from the pivot axis of said pivot nut;
• and
• means for rotating said connecting rod such that said threaded end moves axially in said threaded opening, whereby the first subassembly pivots about the second pivot axis in response to the rotation of said connecting rod, to provide the further elevation adjustment of the tool.

In an elevation setting mechanism for a motor-driven tool in a power tool apparatus which comprises a housing including a tabletop having an opening through which the tool can pass, assembly means pivotally mounted in the housing about a first pivot axis the assembly means including frame means, a first subassembly including the tool pivotally mounted in the frame means about a second pivot axis, a second subassembly pivotally mounted about the second pivot axis, the mechanism including a control lever operatively connected to the second subassembly for pivoting the same, about said second pivot axis and means connecting the first subassembly to the second subassembly, whereby the first subassembly pivots about the first pivot axis in unison with the second subassembly, such that the tool is raised or lowered in the opening to a desired elevation with respect to the tabletop, in a quick and coarse setting manner, the second subassembly further including locking means for securing the second subassembly at a position corresponding to the desired coarse elevation setting for the tool and second control means operatively connected to the first subassembly for pivoting the first subassembly about the second pivot axis independently of the rotational movement thereof due to its connection with the second subassembly, said second control means providing a further elevation adjustment of the tool the improvement to the second control means comprising:

• a pivot nut pivotally mounted to the first subassembly, said pivot nut having a threaded opening perpendicular to its pivot axis in the first subassembly;
• a connecting rod having a threaded end disposed in said threaded opening;
• means for restraining axial movement of said rod towards or away from the pivot axis of said pivot nut;
• and
• means for rotating said connecting rod such that said threaded end moves axially in said threaded opening, whereby the first subassembly pivots about the second pivot axis in response to the rotation of said connecting rod, to provide the further elevation adjustment of the tool,
• said connecting rod rotatably connected to the control lever whereby the operative connection between the control lever and the first subassembly is effected,
• said first and second subassemblies including respective hub members, whereby said subassemblies are pivotally mounted on the second pivot axis said hub means including cooperating key means for limiting the rotational movement of said first subassembly in response to the rotation of said connecting rod and therefore, limiting the further elevation adjustment of the tool.

In an elevation setting mechanism for a saw blade in a table saw which comprises a housing including a tabletop having an opening through which the saw blade can pass, drive means for the saw blade and assembly means pivotally mounted in the housing and which includes the saw blade, the mechanism including first control means having a control lever operatively connected to the assembly means for pivoting same, whereby the saw blade is raised or lowered in the opening to a desired elevation with respect to the tabletop in a quick and coarse setting manner, and locking means for securing the control lever to the housing at a position corresponding to the desired coarse elevation setting for the saw blade, and second control means operatively connected to the assembly means for pivoting the assembly means independently of the control lever, the second control means providing a vernier elevation adjustment of the saw blade, the improvement to the second control means comprising:

• a pivot nut pivotally mounted to the assembly means, said pivot nut having a threaded opening transverse to its axis of rotation in the assembly means;
• a connecting rod having a threaded end disposed in said threaded opening;
• means for restraining axial movement of said rod towards or away from the pivot axis of said pivot nut;
• and
• means for rotating said connecting rod such that said threaded end moves axially in said threaded opening, whereby the assembly means pivots about its pivoted mounting in the housing in response to the rotation of said connecting rod, to provide the vernier elevation adjustment of the saw blade.