Power tool table with safety shut-off
AssigneeHirsh Company
InventorsIrwin J. Ferdinand, Richard Sylvan, Herbert Baisch
Life of this patent
Estimating the term…
Abstract
A table for supporting an electric power tool is provided with a safety shut-off device. A bar is pivotably mounted on the side of the table and a shut-off switch is mounted to the table behind the bar. The bar is biased away from the shut-off switch by a spring. If an operator falls or leans against the bar, the switch is actuated to shut off the power to the tool.
Claims9
An improvement in a table assembly for supporting a power tool in which said assembly includes a table defining, along one or more of its sides, an operator location or locations in which the operator stands while operating the tool, the improvement comprising:
- (a) an abutment rail disposed adjacent at least one of said operator locations;
- (b) means for mounting said abutment rail on said table which allow the rail to be moved towards and away from said operator location;
- (c) an electrical feed for supplying power to said tool;
- and
- (d) a two position switch electrically connected between said tool and said feed, said switch including a switch actuating button adapted for being moved by said rail to a self-maintained position in which said switch interrupts the supply of power to said tool for preventing re-energization of said tool even after said rail is moved back toward said operator location.
An improvement in a table assembly for supporting an electrically operated power tool in which said assembly includes a table defining, along one or more of its sides, an operator location or locations in which the operator stands while operating the tool, the improvement comprising:
- (a) an electric power feed means carried by said table for supplying power from an external source of electric power to said assembly;
- (b) a switch carried by said table and adapted to be electrically connected between the said power feed means and said power tool for permitting the transmission of electric power to said power tool for operating said power tool when the switch is in a first position and for interrupting the supply of electric power to said power tool when the switch is in a second position;
- and
- (c) an abutment rail mounted to said table adjacent at least one of said operator locations and adapted to be moved (1) toward said one operator location to permit said switch to be actuated to said first position by said operator for energizing said power tool and (2) away from said one operator location by movement of the operator against the rail to actuate said switch to said second position and thereby shut off the power to said tool.
An improvement in a table assembly for supporting a power tool in which said assembly includes a table defining an operator location along one edge, the improvement comprising:
- (a) an electric conductor supported by said table and adapted to transmit electricity from an electric power source;
- (b) a shut-off switch connected to said conductor and mounted to the underside of said table adjacent to said one edge;
- (c) an electric outlet receptacle connected in series with said shut-off switch and adapted to connect the shut-off switch to said tool;
- (d) a pair of spaced-apart mounting brackets on the underside of said table adjacent said one edge;
- (e) an arm pivotably mounted to each of said mounting brackets;
- (f) a cylindrical bar adjacent and generally parallel to said one edge of said table and secured at each end to one of said arms whereby the bar can be moved between a first position adjacent said operator location and a second position engaging said shut off switch;
- and
- (g) a leaf spring secured to and extending from the underside of said table along said one edge for biasing said bar toward first said position.
Dependencies are inferred from the claim text.