Process for the control of the forward speed of work-pieces

Claim 3

A machine with automatic feed speed control comprising, work-piece advancing means for advancing a work-piece in a feed path at a feed speed, work-piece tooling means having a tool member movable in the feed path with a portion engageable with the work-piece for tooling a work-piece and for receiving a load from the advancing work-piece proportional to the size of the portion of said tool member engaged with the work-piece, speed control means connected to said work-piece advancing means for increasing and decreasing the speed of said work-piece advancing means to increase and decrease the feed speed of the work-piece in the feed path, work-piece sensing means in the feed path engageable with the work-piece to sense the size of the portion of said tool member engageable with the work-piece which corresponds to a maximum load on said work-piece tooling means, and means connected between said work-piece tooling means and said work-piece advancing means and connected to said work-piece sensing means for reducing the speed of said work-piece advancing means when said maximum load determined by said work-piece sensing means is exceeded.

Claim 4

A machine with automatic feed speed control comprising, work-piece advancing means for advancing a work-piece in a feed path at a feed speed, work-piece tooling means having a tool member movable in the feed path with a portion engageable with the work-piece for tooling a work-piece and for receiving a load from the advancing work-piece proportional to the size of the portion of said tool member engaged with the work-piece, speed control means connected to said work-piece advancing means for increasing and decreasing the speed of said work-piece advancing means to increase and decrease the feed speed of the work-piece in the feed path, work-piece sensing means in the feed path engageable with the work-piece to sense the size of the portion of said tool member engageable with the work-piece which corresponds to a maximum load on said work-piece tooling means, and means connected between said work-piece tooling means and said work-piece advancing means and connected to said work-piece sensing means for reducing the speed of said work-piece advancing means when said maximum load determined by said work-piece sensing means is exceeded.

Claim 5

A machine according to claim 2 wherein said means connected between said work-piece advancing means and said work-piece tooling means comprises a current/tension transducer, said work-piece tooling means including a tooling motor having a line adapated to be connected with a source of electricity, said transducer connected to said line, said sensing means comprising a plurality of feelers disposed across said feed path for producing an electric signal corresponding with the maximum load for the tooling motor, said transducer being connected to said work-piece advancing means and to said feelers, wherein when an actual load on said tooling motor exceeds said maximum load produced by said signal from said feelers, said work-piece advancing means speed is reduced.

Claim 6

A machine according to claim 3 wherein said advancing means comprises an advancing motor connected to an advancing roller for engaging a work-piece and advancing it in said work path.

Claim 7

A machine according to claim 3 wherein said current/tension transducer comprises a transformer having a primary winding connected to said line on said tooling motor and a secondary winding connected to said feelers, said speed control means connected to said work-piece advancing means comprising a semi-controlled bridge, the secondary winding of said transducer connected to said semi-controlled bridge for controlling the speed of said work-piece advancing means.

Claim 8

A machine according to claim 3 wherein said feelers are connected in parallel with each other and each comprises a switch connected in series with a resistor, said switches being disposed across said feed path, a number of said switches engageable by a work-piece advancing along said feed path, said number of switches engaged corresponding with the size of the portion of said tool member in said feed path.

Claim 9

A machine according to claim 6 wherein said tooling member comprises a plurality of cutting blades disposed across said feed path, the number of switches closed by said advancing work-piece corresponding with the number of blades engaged with said work-piece.

Claim 10

A machine according to claim 6 wherein said transducer comprises a transformer having a primary winding connected to the power line of said tooling motor and a secondary winding connected to said parallel connected feelers.

Claim 11

A machine according to claim 8 wherein said transducer further includes a D.C. rectifier for forming impulses when the actual load on said work-piece tooling means exceeds said load determined by said sensing means, and an amplifier for amplifying said impulses connected between said transducer and said speed control means.

Claim 12

A machine according to claim 9 wherein said speed control means comprises a semi-controlled bridge connected to said work-piece advancing means.

Claim 13

A machine with automatic feed speed control comprising, a work-piece advancing motor, a work-piece advancing roller connected to said work-piece advancing motor engageable with a work-piece for advancing it at a feed speed in a feed path, said advancing motor comprising a direct current motor having a power supply connected thereto, a semi-controlled bridge connected in said power supply of said advancing motor for controlling the speed thereof, a tooling motor, a tooling member connected to and rotatable by said tooling motor comprising a shaft and a plurality of axially aligned blades thereon extending in said feed path, a power line connected to said tooling motor, a transducer comprising a transformer having a primary winding connected to said power line of said tooling motor and a secondary winding, a plurality of sensors connected in parallel with each other and with said secondary winding of said transformer, each sensor comprising a sensing switch in series with a resistor, a rectifier in said secondary winding of said transformer, said secondary winding of said transformer connected to said semi-controlled bridge, said sensing switches extending across said feed path, whereby a work-piece advanced in said feed path closes a number of said sensing switches corresponding to the number of blades engaged with said work-piece for producing an impulse corresponding with a maximum load appliable to said tooling motor, said advancing motor being reduced in speed through said semi-controlled bridge by said transducer when an actual load on said tooling motor exceeds said maximum load determined by said plurality of closed sensing switches.

Claim 14

A machine with automatic feed speed control comprising, a work-piece advancing motor, a work-piece advancing roller connected to said work-piece advancing motor engageable with a work-piece for advancing it at a feed speed in a feed path, said advancing motor comprising a direct current motor having a power supply connected thereto, a semi-controlled bridge connected in said power supply of said advancing motor for controlling the speed thereof, a tooling motor, a tooling member connected to and rotatable by said tooling motor comprising a shaft and a plurality of axially aligned blades thereon extending in said feed path, a power line connected to said tooling motor, a transducer comprising a transformer having a primary winding connected to said power line of said tooling motor and a secondary winding, a plurality of sensors connected in parallel with each other and with said secondary winding of said transformer, each sensor comprising a sensing switch in series with a resistor, a rectifier in said secondary winding of said transformer, said secondary winding of said transformer connected to said semi-controlled bridge, said sensing switches extending across said feed path, whereby a work-piece advanced in said feed path closes a number of said sensing switches corresponding to the number of blades engaged with said work-piece for producing an impulse corresponding with a maximum load appliable to said tooling motor, said advancing motor being reduced in speed through said semi-controlled bridge by said transducer when an actual load on said tooling motor exceeds said maximum load determined by said plurality of closed sensing switches.