Speed regulator for power tool
AssigneeThe Singer Company
InventorsJohn Houser, Jr., Thomas C. Laughon
Life of this patent
Estimating the term…
Abstract
A power tool in which feed rate information is used as a means of changing cutting implement speed to maintain an optimum chip rate removal. As the tool is loaded by a feed rate increase, the motor speed will increase to that point empirically determine to provide a good finish for the material and cutting implement size selected. If the load decreases, the motor speed will correspondingly decrease to that speed which will provide a good finish for the material and cutting implement size selected with out overheating of the material. A limit would be set to indicate to an operator when he is at the upper limit of the speed and feed rate range and turn off the tool after a short period of time to prevent destructive overheating.
Claims8
A power tool for operating on a work material in which the feeding rate between the work material and the power tool is imposed by the direct muscular effort of an operator, said power tool having a frame supporting a motor, and a cutting implement driven by said motor, said power tool comprising:
- (a) selecting means for selecting a work material to be operated upon;
- (b) regulating means including memory means supported in said frame and responsive to a selected material for regulating speed of said motor to an optimum speed for said selected material from a first table of a first speed for various materials stored in said memory;
- and,
- (c) responding means including said regulating means for responding to an operator imposed feed condition in which the loading imposed by the operator exceeds a preferred loading for operation of said power tool at said first speed, by increasing the speed of said cutting implement according to a second table of optimum speeds for various materials at various loadings stored in said memory of said regulating means.
A power tool for operating on a work material in which the feeding rate between the work material and the power tool is imposed by the direct muscular effort of an operator, said power tool having a frame supporting a motor, and a cutting implement driven by said motor, said power tool comprising:
- (a) selecting means for selecting a cutting implement size for operation on said work material;
- (b) regulating means including memory means supported in said frame and responsive to a selected cutting implement size for regulating speed of said motor to an optimum speed for selected cutting implement size from a first table of a first speed for various cutting implement sizes stored in said memory;
- and,
- (c) responding means including said regulating means for responding to an operator imposed feed condition in which the loading imposed by the operator exceeds a preferred loading for operation of said power tool at said first speed, by increasing the speed of said cutting implement according to a second table of optimum speeds for various cutting implement sizes at various loadings stored in said memory of said regulating means.
A power tool for operating on a work material in which the feeding rate between the work material and the power tool is imposed by the direct muscular effort of an operator, said power tool having a frame supporting a motor, and a cutting implement driven by said motor, said power tool comprising:
- (a) selecting means for selecting a work material and cutting implement size;
- (b) regulating means including memory means supported in said frame and responsive to a selected material and cutting implement size for regulating speed of said motor to an optimum speed for said selected material and cutting implement size from a first table of a first speed for various materials and cutting implement sizes stored in said memory;
- and,
- (c) responding means including said regulating means for responding to an operator imposed feed condition in which the loading imposed by the operator exceeds a preferred loading for operation of said power tool at said first speed, by increasing the speed of said cutting implement according to a second table of optimum speeds for various materials and cutting implements sizes at various loadings stored in said memory of said regulating means.
Dependencies are inferred from the claim text.