Emerson Electric Company

Steven H Plume

Daniel A Terpstra

Robert E Steiner

Nicholas J Hirsch

Karmen D Cox

James J Metzger, Jr

A food waste disposer has a motor driven with pulse width modulation ('PWM'). A grinding profile is controlled based on PWM values of the PWM controller driving the motor. In an aspect, controlling the grinding profile includes varying the speed of the motor based on the PWM values. In an aspect, the grinding profile is initiated after the food waste disposer is started and a PWM value exceeds a set value indicating the presence of a grinding load in a grinding section of the food waste disposer. In an aspect, it is determined that the grinding load has been sufficiently ground once the PWM value does not exceed a first set value after the grinding profile has been initiated. In an aspect, corrective action is initiated when the PWM value exceeds the set value after a predetermined period of time.

Food waste disposer with PWM based control of grinding profile

A combined belt and disc sander is disclosed which provides a belt sander than can be pivoted from a horizontal to vertical position, a disc sander that is fixed below the upper horizontal plane of the belt sander, and a drive motor assembly than can drive both the belt sander and disc sander. A movable work table for supporting a workpiece is capable of being used with the belt sander or the disc sander, as may be desired. The angle of the work table relative to the belt sander or the disc sander can be adjusted so that the workpiece can be placed at the desired angle relative to the belt or disc sander. The sander further includes a sawdust collection mechanism that can be attached to a utility vacuum cleaner.

Combination belt and disc sander

An angularly adjustable band saw is disclosed which provides the desired angular adjustment of an endless band saw blade relative to a workable surface for bevel and/or miter cutting of a workpiece. The worktable surface is part of a supporting worktable that includes a saw blade slot extending through the worktable surface. A frame support is fixed to the worktable below the worktable surface and a movable frame is operatively connected relative to the frame support. The movable frame includes an upper band saw supporting wheel above the worktable surface and a lower band saw supporting wheel below the worktable surface, with an endless band saw blade mounted for movement about the upper and lower band saw supporting wheels, including through the saw blade slot in the worktable surface. The movable frame, including its associated endless band saw blade, is adjustable relative to the frame support and the worktable to provide the desired angular adjustment of the endless band saw blade relative to the worktable surface for bevel and/or miter cutting of a workpiece.

Angularly adjustable band saw

A power saw includes a motor for driving a saw blade or the like around its rotational axis to cut a workpiece. The position of the rotational axis with respect to a reference position is sensed and a manually operated keyboard is provided for entering a desired change in the position of the rotational axis. Positioning motors are provided along with circuitry which is responsive to the entering of a desired change in the position of the rotational axis of the saw blade for moving the axis correspondingly.

Growing community of inventors

St. Charles County, MO, United States of America

Steven H Plume