Light beam alignment system
AssigneeOne World Technologies Limited
InventorsGerhard Josef Karl Weusthof, John Ka Ki Chan
Life of this patent
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Abstract
A saw such as a chop saw, a circular saw, a compound miter saw or a sliding compound miter saw having a rotatable saw blade is provided with a laser arbor alignment system. The laser arbor may include a power generator that generates power as the saw blade and the laser arbor are rotated by a spindle. The generator may include a stator comprising an electrical magnet or a permanent magnet mounted on a fixed portion of the saw. The other portion of the generator is a rotor comprising a coil that is rotated with the laser arbor to generate power for the laser. Power may also be provided to the laser by slip ring contacts from a stationary source to the laser arbor.
Claims18
A laser arbor for a saw having a spindle that rotates a saw blade relative to a non-rotating portion of the saw, the laser arbor comprising:
- a housing;
- a laser light disposed at least in part within the housing;
- a circuit electrically connected to the laser for providing power to the laser, the circuit providing power from a voltage source that includes a portion secured to the non-rotating portion of the saw.
The laser arbor for a saw having a spindle of claim1 wherein a fixed guard is part of the non-rotating portion of the saw.
A saw comprising:
- a motor having a spindle;
- a blade secured to the spindle and rotated by the motor to cut a workpiece;
- a laser arbor having a housing secured to the spindle for rotation with the blade;
- a light source disposed in the housing, the light source emitting a narrow beam of light adjacent the blade for providing a visual indication of the alignment of the blade with the workpiece;
- and
- a generator electrically connected to the light source for providing power to the light source, wherein the generator includes a rotor associated with and rotated with the housing and a stator secured adjacent to the housing, the rotor being rotated by the motor relative to the stator for generating a electrical power for the light source.
A saw comprising:
- a motor having a spindle;
- a blade secured to the spindle and rotated by the motor to cut a workpiece;
- a laser arbor having a housing secured to the spindle for rotation with the blade;
- a light source disposed in the housing, the light source emitting a narrow beam of light adjacent the blade for providing a visual indication of the alignment of the blade with the workpiece;
- and
- an inductively coupled power source electrically connected to the light source, wherein the power source includes a first induction coil associated with and rotated with the housing and a second induction coil secured adjacent to the housing, the second induction coil inducing voltage in the first induction coil to provide power to the light source.
A saw comprising:
- a motor having a spindle;
- a blade secured to the spindle and rotated by the motor to cut a workpiece;
- a laser arbor having a housing secured to the spindle for rotation with the blade;
- a light source disposed in the housing, the light source emitting a narrow beam of light adjacent the blade for providing a visual indication of the alignment of the blade with the workpiece;
- and
- a generator electrically connected to the light source for providing power to the light source, the generator having a permanent magnet secured to a fixed guard and a coil rotated by the spindle.
A saw comprising:
- a motor having a spindle;
- a blade secured to the spindle and rotated by the motor to cut a workpiece;
- a laser arbor having a housing secured to the spindle for rotation with the blade;
- a light source disposed in the housing, the light source emitting a narrow beam of light adjacent the blade for providing a visual indication of the alignment of the blade with the workpiece;
- and
- a power source electrically connected by a plurality of slip ring contacts that establish electrical contact with the light source, wherein the slip ring contacts comprise a set of rotating contacts that rotate with the blade and a set of fixed contacts that are stationary and are mounted on the saw to contact the first set of contacts.
Dependencies are inferred from the claim text.