Electronic can reject system

Claim 2

An electrical circuit for processing weld monitor signals comprising: a high comparator circuit having an input and output, a low comparator circuit having an input and output, an inverter circuit for generating a signal when no signal is applied to the input of said inverter circuit, said inverter input being electrically connected to said low comparator output, and indicator means electrically connected to said high comparator and said inverter for utilizing signals from said comparator and said inverter to give an indication of a bad weld.

Claim 3

An electrical circuit for processing weld monitor signals as set forth in claim 1 in which said indicator means comprises: an electrical indicator electrically connected to said output of said high comparator, and an electrical indicator electrically connected to said output of said inverter.

Claim 4

An electrical circuit for processing weld monitor signals as set forth in claim 1 in which additional elements comprise: an OR gate having one input electrically connected to the output of said high comparator and another input electrically connected to the output of said inverter, and indicator means electrically connected to the output of said OR gate for utilizing signals from said OR gate to give an indication of a bad weld.

Claim 5

An electrical circuit for processing weld monitor signals as set forth in claim 1 in which additional elements comprise: a monostable multivibrator, and AND gate electrical connecting means connecting said multivibrator and said AND gate in series between the output of said low comparator and the input of said OR gate. electrical connecting means connecting the output of said inverter to the unused input of said AND gate.

Claim 6

An electrical logic circuit for processing signals derived from a sensing means for generating electrical signals in proportion to the heat emanating from a welded seam of succession of spaced objects comprising: a high comparator circuit having a plurality of inputs and an output, a low comparator circuit having a plurality of inputs and an output, reference signal biasing means electrically connected to each said comparator, a single-shot pulse generator, an inverter circuit for generating a signal at its output when no signal is applied to the input of said inverter circuit, a first AND gage having a first input and a second input and one output, an OR gate having a plurality of inputs and an output, conductive means connecting the output of said inverter circuit to said first input of said first AND gate, conductive means connecting the input terminal of said inverter to said low component output and connecting the output of said first AND gate to an input of said OR gate, conductive means connecting said output of said high comparator circuit to another input of said OR gate, a first flip-flop circuit having a reset input for turning said flip-flop off and a set input for turning said flip-flop on, conductive means electrically connecting the output of said OR gate to the set input of said flip-flop, a shift register having at least one shift station, each shift station having a data input, a shift input and a signal output, a second flip-flop circuit having a reset terminal, a set terminal and an output terminal, a resettable monostable multivibrator having a reset input, a set input and an output, means electrically connecting the output of said single-shot pulse generator to said set input of said second flip-flop, to said reset input of said resettable monostable multivibrator, to said reset terminal of said first flip-flop and to said shift input of each said shift register station, a second AND gate having a first and a second input and an output, conductive means connecting the output of said second AND gate to the set input of said resettable monostable multivibrator, conductive means connecting said output of said low comparator to said first input of said second AND gate, conductive means connecting said second input of said second AND gate to said second flip-flop output terminal, conductive means connecting said output of said resettable monostable multivibrator to said second input of said first AND gate, conductive means connecting said output of said resettable monostable multivibrator to said reset terminal of said second flip-flop, means electrically connected to the output of said shift register for generating a delayed signal to actuate a distinguishing means whereby an object having a welded sEam which is defective may be distinguished from an object having a good seam.

Claim 7

An electrical logic circuit for processing signals derived from a sensing means for generating electrical signals in proportion to the heat emanating from a welded seam of succession of spaced objects comprising: a high comparator circuit having a plurality of inputs and an output, a low comparator circuit having a plurality of inputs and an output, reference signal biasing means electrically connected to each said comparator, a single-shot pulse generator, an inverter circuit for generating a signal at its output when no signal is applied to the input of said inverter circuit, a first AND gage having a first input and a second input and one output, an OR gate having a plurality of inputs and an output, conductive means connecting the output of said inverter circuit to said first input of said first AND gate, conductive means connecting the input terminal of said inverter to said low component output and connecting the output of said first AND gate to an input of said OR gate, conductive means connecting said output of said high comparator circuit to another input of said OR gate, a first flip-flop circuit having a reset input for turning said flip-flop off and a set input for turning said flip-flop on, conductive means electrically connecting the output of said OR gate to the set input of said flip-flop, a shift register having at least one shift station, each shift station having a data input, a shift input and a signal output, a second flip-flop circuit having a reset terminal, a set terminal and an output terminal, a resettable monostable multivibrator having a reset input, a set input and an output, means electrically connecting the output of said single-shot pulse generator to said set input of said second flip-flop, to said reset input of said resettable monostable multivibrator, to said reset terminal of said first flip-flop and to said shift input of each said shift register station, a second AND gate having a first and a second input and an output, conductive means connecting the output of said second AND gate to the set input of said resettable monostable multivibrator, conductive means connecting said output of said low comparator to said first input of said second AND gate, conductive means connecting said second input of said second AND gate to said second flip-flop output terminal, conductive means connecting said output of said resettable monostable multivibrator to said second input of said first AND gate, conductive means connecting said output of said resettable monostable multivibrator to said reset terminal of said second flip-flop, means electrically connected to the output of said shift register for generating a delayed signal to actuate a distinguishing means whereby an object having a welded sEam which is defective may be distinguished from an object having a good seam.

Claim 8

An electrical logic circuit for processing signals derived from a sensing means for generating electrical signals in proportion to the heat emanating from the welded seam of a succession of spaced objects as set forth in claim 5 wherein the means for generating a delayed signal comprises: a delayed time single-shot multivibrator having an input and an output terminal, an actuation timer electrically connected to the output terminal of said multivibrator, distinguishing means electrically actuated by the output of said actuation timer for rendering said object, having poor welds distinguishable from the objects having good welds.

Claim 9

An electrical logic circuit for processing signals derived from sensing means for generating electrical signals in proportion to the heat emanating from the welded seam of a succession of spaced objects as set forth in claim 5 further comprising: a first conductive means electrically connected to the output of at least one detector unit, diode means having inputs electrically connected to said conductive means, a second conductive means electrically connected to the output of said diode means and electrically connected to the input terminal of said high comparator and said low comparator.

Claim 10

An electrical logic circuit for processing signals derived from sensing means for generating electrical signals in proportions to the heat emanating from the welded seam of a succession of spaced objects as set forth in claim 5 further comprising: a third flip-flop circuit having a reset terminal, a set terminal and an output terminal, means electrically connecting the output terminal of said high comparator to the set terminal of said flip-flop circuit, a first monostable multivibrator having an input terminal and an output terminal, means electrically connecting the output terminal of said flip-flop to the input terminal of said monostable multivibrator, a high defect counter having drive means, means electrically connecting the output terminal of said monostable multivibrator to the high defect counter, a fourth flip-flop circuit having a reset terminal, a set terminal and an output terminal, means electrically connecting said output terminal of said first AND gate to the set terminal of said fourth flip-flop, means electrically connecting said output terminal of said pulse generator to said reset terminal of said fourth flip-flop, a second monostable multivibrator having an input terminal and an output terminal, means electrically connecting the output terminal of said fourth flip-flop to the input terminal of said second monostable multivibrator, a low defect counter having drive means, and an input terminal means electrically connecting the output terminal of said second monostable multivibrator to the input terminal of said low defect counter whereby said low defect counter registers the number of defective objects detected in a series of welded objects.

Claim 11

An electrical logic circuit for processing signals derived from a sensing means for generating electrical signals in proportion to the heat emanating from a welded seam of a succession of spaced objects as set forth in claim 5 in which said shift register and said means for generating a delayed signal comprise; a plurality of shift register shift stations electrically connected with the signal output of one station electrically connected to the data input of its successor and said single-shot pulse generator being electrically connected to the shift input of each station, a fourth AND gate having two inputs and an output, conductive means connecting an input of said fourth AND gate with the input post of the last shift register shift station, conductive means connecting the other input terminal of said fourth AND gate to the output terminal of next to said last shift register shift statiOn, a clocked flip-flop having a set terminal, a reset terminal and an output terminal, conductive means electrically connecting the date terminal of said clocked flip-flop to the output terminal of said fourth AND gate, a second OR gate having inputs and an output, conductive means electrically connecting an input of said second OR gate with the output of said clocked flip-flop, distinguishing means for making said defectively welded objects distinguishable, conductive means electrically connecting the input of said distinguishing means with the output of said second OR gate, delay single-shot means for delaying an electrical impulse a predetermined time, conductive means connecting the input of said delay single-shot means to said pulse generator single-shot output, a reject single-shot multivibrator, conductive means electrically connecting the input of said reject single shot to the output of said delay single shot, a third AND gate having two inputs and one output, conductive means between one input of said fourth AND gate and the output of said last shift register shift station, conductive means for electrically connecting the reset input of said clocked flip-flop to the output of said reject single shot, conductive means electrically connecting the other input of said third AND gate to the output of said reject single shot, and conductive means electrically connecting the output of said third AND gate to an input of said second OR gate.

Claim 12

An electrical logic circuit for processing signals derived from sensing means for generating electrical signals in proportion to the heat emanating from the welded seam of a succession of spared objects as set forth in claim 5 further comprising; a flip-flop having a set input, a reset input and an output, conductive means for electrically conducting output of said low comparator circuit to the set input of said flip-flop, fifth AND gate having two inputs and one output, conductive means electrically connecting the output of the flip-flop to one of said fifth AND gate terminals, conductive means electrically connecting the output of said single shot pulse generator to the other input of said fifth AND gate to the reset input of said flip-flop, conductive means electrically connecting the output of said fifth AND gate to a third input of said second OR gate.