Cut and clinch head for trimming, forming and detecting lead presence and absence of DIP components

Claim 1

An apparatus for trimming and forming in-line rows of leads of an electronic component which extend through holes in and below the underside of a circuit board such that an excess portion of each lead is trimmed off and a remaining portion of each lead is formed by bending so as to clinch said component to said circuit board, said apparatus comprising: a head assembly comprising spaced, fixed anvils and movable trimming and forming arms, each of said trimming and forming arms cooperating with a respective anvil to trim and form the leads of one of said rows of leads which extend below said circuit board; means for biasing each of said trimming and forming arms away from said respective anvil so as to provide a gap into which a row of leads is receivable; means for moving said trimming and forming arms across said anvils upon command; and means for detecting individually the presence and absence of each of said leads extending below said circuit board, said detecting means comprising an in-line row of separate flexible contact fingers attached to each of said anvils respectively, means for insulating electrically each of said fingers one from the other and from said anvil to which said fingers are attached and each of said contact fingers being engageable with said remaining portion of a respective lead after said trimming and during said bending, such that said trimming and forming arms push each said remaining portion into contact with a respective finger during said bending so as to complete a separate electrical circuit through each particular remaining portion to a respective finger upon the presence of said particular remaining portion and not to complete said circuit upon the absence of said particular remaining portion.

Claim 2

An apparatus for trimming and forming in-line rows of leads of an electronic component which extend through holes in and below the underside of a circuit board such that an excess portion of each lead is trimmed off and a remaining portion of each lead is formed by bending so as to clinch said component to said circuit board, said apparatus comprising: a head assembly comprising spaced, fixed anvils and movable trimming and forming arms, each of said trimming and forming arms cooperating with a respective anvil to trim and form the leads of one of said rows of leads which extend below said circuit board; means for biasing each of said trimming and forming arms away from said respective anvil so as to provide a gap into which a row of leads is receivable; means for moving said trimming and forming arms across said anvils upon command; and means for detecting individually the presence and absence of each of said leads extending below said circuit board, said detecting means comprising an in-line row of separate flexible contact fingers attached to each of said anvils respectively, means for insulating electrically each of said fingers one from the other and from said anvil to which said fingers are attached and each of said contact fingers being engageable with said remaining portion of a respective lead after said trimming and during said bending, such that said trimming and forming arms push each said remaining portion into contact with a respective finger during said bending so as to complete a separate electrical circuit through each particular remaining portion to a respective finger upon the presence of said particular remaining portion and not to complete said circuit upon the absence of said particular remaining portion.