Stapler

Claim 2

An electromagnetic power device comprising plunger means linearly movable through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position and circuit means including sequentially operable switch means for energizing first said advancing coil means and thereafter said driving coil means to move said plunger means first through said advancing stroke and thereafter through said driving stroke.

Claim 3

An electromagnetic power device as claimed in claim 1, wherein said circuit means includes single pulse generating means for energizing said driving coil means.

Claim 4

An electromagnetic power device as claimed in claim 2, wherein said sequentially operable switch means includes a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil, said switch means only in said driving switch position operating said single pulse generating means to generate a single pulse and only in said normal switch position operating to reset said single pulse generating means.

Claim 5

An electromagnetic power device as claimed in claim 3 wherein said single pulse generating means includes capacitor means said switch means only in said driving switch position operating to discharge said capacitor means to generate said single pulse and only in said normal switch position operating to charge said capacitor means.

Claim 6

An electromagnetic power device comprising plunger means linearly movable through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including sequentially operable switch means for energizing first said advancing coil means and thereafter said driving coil means to move said plunger means first through said advancing stroke and thereafter through said driving stroke.

Claim 7

An electromagnetic power device comprising plunger means linearly movable through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including sequentially operable switch means for energizing first said advancing coil means and thereafter said driving coil means to move said plunger means first through said advancing stroke and thereafter through said driving stroke.

Claim 8

An electromagnetic power device comprising plunger means linearly movable through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including single pulse generating means for energizing said driving coil means and sequentially operable switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil, said switch means only in said driving switch position operating to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means.

Claim 9

An electromagnetic power device comprising plunger means linearly movable through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including single pulse generating means for energizing said driving coil means and sequentially operable switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil, said switch means only in said driving switch position operating to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means.

Claim 10

An electromagnetic power device as claimed in claim 6, wherein said single pulse generating means includes capacitor means and said switch means only in said driving switch position operates to discharge said capacitor means to generate said single pulse and only in said normal switch position operates to reset said single pulse generating means to charge said capacitor means.

Claim 11

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position and circuit means including sequentially operable switch means for energizing first said advancing coil means and thereafter said driving coil means to move said plunger means first through said advancing stroke and thereafter through said driving stroke.

Claim 12

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position and circuit means including sequentially operable switch means for energizing first said advancing coil means and thereafter said driving coil means to move said plunger means first through said advancing stroke and thereafter through said driving stroke.

Claim 13

In a stapler or the like as claimed in claim 8, wherein said plunger means is coaxial with said operating rod and is adjustably connected thereto.

Claim 14

In a stapler or the like as claimed in claim 8, wherein said advancing coil means is effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means is effective to move said plunger with greater force than said advancing coil means.

Claim 15

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil and an operating plate mounted on said base for sequentially operating said switch means.

Claim 16

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil and an operating plate mounted on said base for sequentially operating said switch means.

Claim 17

In a stapler or the like as claimed in claim 11, further including opposing means effective to provide greater opposing force to movement of said plate to said driving switch position than to movement of said plate to said advancing switch position.

Claim 18

In a stapler or the like as claimed in claim 12, wherein said opposing means is spring means interposed between said base and said operating plate.

Claim 19

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position circuit means including single pulse generating means for energizing said driving coil means and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil and an operating plate mounted on said base for sequentially operating said switch means said switch means only in said driving switch position operating to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means.

Claim 20

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position circuit means including single pulse generating means for energizing said driving coil means and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil and an operating plate mounted on said base for sequentially operating said switch means said switch means only in said driving switch position operating to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means.

Claim 21

In a stapler or the like as claimed in claim 14, wherein said single pulse generating means includes capacitor means and said switch means only in said driving switch position operates to discharge said capacitor means to generate said single pulse and only in said normal switch position operates to reset said single pulse generating means to charge said capacitor means.

Claim 22

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position said plunger means being coaxial with said operating rod and being adjustably connected thereto advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including single pulse generating means having capacitor means for energizing said driving coil means and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil an operating plate mounted on said base for sequentially operating said switch means and spring means interposed between said base and said operating plate effective to provide greater opposing force to movement of said plate to said driving switch position than to movement of said plate to said advancing switch position said switch means only in said driving switch position operating to discharge said capacitor means to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means to charge said capacitor means.

Claim 23

In a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil and an operating rod pivotally mounted on said driving head and extending therefrom adjacent said support member for moving said driving head, an electromagnetic power device for moving said operating rod comprising plunger means mounted on said support member for linear movement through an advancing stroke from a first inoperative position to a second position and through a driving stroke from said second position toward a third position said plunger means being coaxial with said operating rod and being adjustably connected thereto advancing coil means for moving said plunger means from said first position to said second position driving coil means for moving said plunger means from said second position toward said third position said advancing coil means being effective to move said plunger means through a greater stroke than said driving coil means and said driving coil means being effective to move said plunger with greater force than said advancing coil means and circuit means including single pulse generating means having capacitor means for energizing said driving coil means and a foot switch including a base sequentially operable switch means mounted on said base, said switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first said advancing coil and thereafter said driving coil an operating plate mounted on said base for sequentially operating said switch means and spring means interposed between said base and said operating plate effective to provide greater opposing force to movement of said plate to said driving switch position than to movement of said plate to said advancing switch position said switch means only in said driving switch position operating to discharge said capacitor means to generate said single pulse and only in said normal switch position operating to reset said single pulse generating means to charge said capacitor means.