Bevel angle control on translatory saw apparatus

In a rotary saw blade control system for use with a horizontal work support surface, a circular saw blade having a bottom horizontal tangent, a guidance system restricting saw motion to a fixed straight horizontal to and fro path over the work support surface, means for adjusting the fixed path by rotation about a fixed first vertical axis for miter angle adjustment, and the blade being rotatably mounted on a shaft driven by a motor, the improvement comprising:

• a first rigid vertical motor mounting plate having a rear face fixedly attached to said motor and a planar front face having extending horizontally therefrom a first pin and a second pin spaced apart from one another, said blade being affixed to said shaft and said shaft being rotatably connected to said motor;
• a first rigid vertical support panel having opposed planar surfaces, a front surface and a rear surface, the rear surface being positioned adjacent the front face of the first mounting plate;
• a support connection means for operatively connecting the first support panel to the guidance system;
• an elongate rigid linkage arm having a first end and a second end, the first end being pivotally attached to the front surface of the first panel and the second end being pivotally attached to the front face of the first plate by means of the second pin;
• a first curvilinear slot means extending between the front and rear surfaces of the first support panel for permitting free movement therethrough of the second pin;
• a second curvilinear slot means extending between the front and rear surfaces of the first support panel for passage of the first pin therethrough with a close tolerance clearance to guide the movement of the first plate in cooperation with the action of the linkage arm to always maintain the bottom horizontal tangent within a plane perpendicular to the work support surface;
• and
• lock means for fixing the relative motion of the mounting plate relative to the support panel in a first mode of operation, and for permitting relative motion therebetween in a second mode of operation for adjustment of the bevel angle.

In a rotary saw blade control system for use with a horizontal work support surface, a circular saw blade having a bottom horizontal tangent, a guidance system restricting saw motion to a fixed straight horizontal to and fro path over the work support surface, means for adjusting the fixed path by rotation about a fixed first vertical axis for miter angle adjustment, and the blade being rotatably mounted on a shaft driven by a motor, the improvement comprising:

• (A) a first rigid vertical motor mounting plate having a rear face fixedly attached to said motor and a planar front face;
• (B) a first rigid vertical support panel having opposed planar surfaces, a front surface and a rear surface, said rear surface being positioned adjacent said front face of said first mounting plate;
• (C) a support connection means for operatively connecting said first support panel to the guidance system;
• (D) a first guide pin affixed to one of said first mounting plate or said first support panel and extending horizontally to the other of said first mounting plate or said first support panel, and a first guide slot means for controlling motion of said first guide pin, said first guide slot means being in the other of said first mounting plate or said first support panel;.
• (E) a second guide pin affixed to one of said first mounting plate or said first support panel and extending horizontally to the other of said first mounting plate or said first support panel, and an arcuate slot in one of said first mounting plate or said first support panel for allowing passage of said second guide pin therethrough;
• (F) said first and second guide pins and said first guide slot means cooperating to maintain the bottom horizontal tangent within a common vertical plane at any bevel angle;
• and
• (G) lock means for fixing the motion of the mounting plate relative to the support panel in a first mode of operation, and for permitting relative motion therebetween in a second mode of operation for adjustment of bevel angle.