Material working and tool control system

• US 5,265,510 A
• Filed: 01/13/1992
• Issued: 11/30/1993
• Est. Priority Date: 01/13/1992
• Status: Expired due to Fees

• Current Assignee: Sigurd Hoyer-Ellefsen
• Original Assignee: Sigurd Hoyer-Ellefsen
• Inventors: Hoyer-Ellefsen, Sigurd
• Primary Examiner(s): Phan, Hien H.
• Assistant Examiner(s): SCHROCK, ALLAN
• Application Number:
  US07/819,218
• Time in Patent Office: 687 Days
• Field of Search: 83/490, 83/471.3, 83/468.1, 83/477.2, 83/491, 83/468.2, 83/468.3, 83/486.1, 83/581, 83/477, 83/477.1, 83/472, 83/473, 83/485
• US Class Current: 83/471.3
• CPC Class Codes: B27B 5/208 the saw blade being mounted on a hanging arm or at the end of a set of bars, e.g. parallelograms
• CPC Class Codes: Y10T 83/762 Angularly relative to plane of cut; e.g., miter
• CPC Class Codes: Y10T 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7722 Support and tool relatively adjustable
• CPC Class Codes: Y10T 83/7772 Angular relative to previous path

Abstract

A material-working and tool control system for use with a workbench includes a system platform in rotatable, co-planar communication with the workbench. Further included is a tool-carrying platform. Also provided are first and second protractor assemblies, each having first and second legs which are adjustably hinged to each other. An opposite end of the first leg is in pivotal communication with the workbench surface through an axis-of-rotation normal to the workbench, and an opposite end of the second leg of the first protractor assembly is in pivotal communication with the tool-carrying platform through an axis-of-rotation also normal to the workbench. A plane is defined by the hinged relationship between the legs of the first protractor assembly which plane is normal to a plane defined by the hinged relationship between the legs of the second protractor assembly. An opposite end of the first leg of the second protractor assembly is in rotational communication with a surface of the rotatable platform through an axis-of-rotation co-parallel to the workbench surface, and the opposite end of the second leg of the second protractor assembly is in rotational communication with the tool-carrying platform through an axis rotation co-parallel with the workbench surface. Resultingly, the position of the tool-carrying platform is defined by the intersection of elliptical segments of rotation (within said normal planes) formed by the opposite ends of the second legs of each of the first and second protractor assemblies.

Claims

1. A material-working and tool control system including a workbench having a substantially planar surface, the system comprising:

(a) a system platform in rotatable communication with said surface of said workbench through a fixed first axis-of-rotation normal to said surface;

(b) a tool-carrying platform;

(c) a first protractor means having first and second co-planar legs, each leg thereof having an hinged end and an opposite end, said hinged ends having a hinge therebetween in which an included angle of said protractor means, within a first plane, is adjustable through said hinge between said first and second legs thereof, said opposite end of said first leg in pivotal communication with said workbench through a second axis-of-rotation normal to and fixed relative to said workbench surface, and said opposite end of said second leg in rotational communication with said tool-carrying platform through a third axis-of-rotation normal to said workbench surface; and

(d) second protractor means having first and second co-planar legs, each leg thereof having an hinged end and an opposite end, said hinged ends having a hinge therebetween in which an included angle of said second protractor means, within a plane normal to said plane of said first protractor means, is adjustable through said hinge between said first and second legs, said opposite end of said first leg in pivotal communication with said rotatable system platform through a fourth axis-of-rotation co-parallel to said workbench surface and said opposite end of said second leg in rotational communication with said tool-carrying platform through a fifth axis-of-rotation co-parallel to said workbench surface,

whereby a path of motion of said tool-carrying platform is defined by said first and second protractor means and the hinges associated therewith.

2. The system as recited in claim 1 in which said tool-carrying platform includes a circular power saw.

3. The system as recited in claim 1 further comprising a position adjustable material-working stop or guide upon said workbench, said stop or guide including a slot through which a cutting element of a tool positioned upon said tool-carrying platform may pass.

4. The system as recited in claim 3 in which said slot of said stop or guide is positioned such that said first axis-of-rotation posses substantially through said slot.

5. The system as recited in claim 1, wherein said workbench further comprises:

a base platform in which said first leg of said first protractor means is, at said opposite end thereof, in rotational communication with said base platform through said second axis-of-rotation normal to said workbench surface.

6. The system as recited in claim 5 in which said first axis-of-rotation of said rotatable platform passes through said base platform.