Positive feed drill with rapid advance

Claim 2

A positive feed drill, the combination including: (a) a spindle adapted to carry a cutting tool; (b) spindle rotating means for rotating said spindle for causing cutting action when said spindle is moved toward the work; (c) spindle feed means for feeding said spindle; (d) spindle feed drive means for operating said spindle feed means at a normal rate; (e) rapid advance drive means for operating said spindle feed means for feeding said spindle toward said work at a rapid advance speed; (f) manually operable means for connecting said spindle feed drive means to said advance speed drive means; and (g) means for locking said rapid advance drive means from operation.

Claim 3

A combination as defined in claim 1 in which there is a signal means incorporated in said rapid advance speed means which operates when said cutting tool engages said work, when said spindle is being driven by said rapid advance speed means, and manually operable means for disconnecting said rapid advance speed means from said spindle feed means.

Claim 4

A combination as defined in claim 2 in which said signal means comprises a clutch in said rapid advance speed means which releases when said cutting tool engages said work.

Claim 5

A combination as defined in claim 1 in which there is a movable gear which can be moved at will between one position in which said spindle feed drive means is connected to said spindle feed means and another position in which said rapid advance speed means is connected to said spindle feed means.

Claim 6

A combination as defined in claim 4 in which said last-mentioned means comprises a gear engageable with said spindle feed means, having clutch means on opposite sides thereof for engagement with said spindle drive means or said rapid advance speed drive means, drive motor, means for connecting said drive motor to said rapid advance speed drive means when said gear clutch is engaged to be driven by said rapid advance speed drive means, and means for locking said rapid advance speed drive means when it is disconnected from said drive motor.

Claim 7

A combination as defined in claim 7 in which there is a manually operable means for disconnecting said rapid advance speed drive means from said spindle feed means.

Claim 8

A positive feed drill, the combination of: (a) a threaded spindle adapted to carry a cutting tool; (b) spindle rotating means having a spindle rotating gear through which said spindle extends for rotating said spindle in a single direction; (c) spindle feed means having a spindle feed gear through which said spindle extends and which is threadedly engageable with said spindle for moving said spindle longitudinally; (d) a motor to which said spindle rotating means is connected for rotating said spindle in a single direction; (e) advance speed drive means for operating said spindle feed means whereby said spindle feed gear may be driven at an advanced speed; (f) connecting means operable independent of longitudinal movement of said spindle feed means for connecting said spindle feed means to be driven either by said spindle rotating means or said advance speed drive means; and (g) means for locking said advance speed gear means from operation.

Claim 9

A positive feed drill, the combination of: (a) a threaded spindle adapted to carry a cutting tool; (b) spindle rotating means having a spindle rotating gear through which said spindle extends for rotating said spindle in a single direction; (c) spindle feed means having a spindle feed gear through which said spindle extends and which is threadedly engageable with said spindle for moving said spindle longitudinally; (d) a motor to which said spindle rotating means is connected for rotating said spindle in a single direction; (e) advance speed drive means for operating said spindle feed means whereby said spindle feed gear may be driven at an advanced speed; (f) connecting means operable independent of longitudinal movement of said spindle feed means for connecting said spindle feed means to be driven either by said spindle rotating means or said advance speed drive means; and (g) means for locking said advance speed gear means from operation.

Claim 10

A combination as defined in claim 7 including means for connecting said advance speed drive means to a motor for driving same, and in which there is a locking means operable to lock said advance speed drive means from operation when said advance speed drive means is disconnected from its driving motor.

Claim 11

A combination as defined in claim 7 in which said connecting means is in the form of a gearing having two positions in which said gear in one position engages a clutch which is driven by the motor and in the other position engages a locking means whereby said gear and its associated parts of said advance speed drive means are restrained from operating.

Claim 12

A combination as defined in claim 7 in which said spindle rotating means has a gear with a clutch on one side thereof, and in whichsaid advance speed drive means has an output clutch and in which said connecting means has an axially movable gear in engagement with said spindle feed means, said axially movable gear having two positions, one position in which it is engageable with the clutch on said gear of said spindle rotating means, and a second position in which it is engageable with the clutch on said advance speed drive means.

Claim 13

A positive feed drill, the combination of: (a) a threaded spindle adapted to carry a cutting tool; (b) a spindle rotating gear through which said spindle extends, for rotating said spindle in a single direction; (c) a spindle feed means including a spindle feed gear through which said spindle extends and which is threadedly engageable with said spindle for moving said spindle longitudinally; (d) gear means connecting said spindle rotating gear to a motor for rotating said spindle in a single direction; (e) advance speed drive means for rotating said spindle feed gear whereby said spindle feed gear may be driven at an advanced speed; (f) a connecting gear connected to drive said spindle feed means, said connecting drive gear having two positions, one position in which it is adapted to be driven by said advance speed drive means and the other position in which it is adapted to be driven by said gear means connecting said spindle rotating gear to a motor; and (g) manually operable means for moving said connecting gear into either of said positions.

Claim 14

A positive feed drill, the combination of: (a) a threaded spindle adapted to carry a cutting tool; (b) a spindle rotating gear through which said spindle extends, for rotating said spindle in a single direction; (c) a spindle feed means including a spindle feed gear through which said spindle extends and which is threadedly engageable with said spindle for moving said spindle longitudinally; (d) gear means connecting said spindle rotating gear to a motor for rotating said spindle in a single direction; (e) advance speed drive means for rotating said spindle feed gear whereby said spindle feed gear may be driven at an advanced speed; (f) a connecting gear connected to drive said spindle feed means, said connecting drive gear having two positions, one position in which it is adapted to be driven by said advance speed drive means and the other position in which it is adapted to be driven by said gear means connecting said spindle rotating gear to a motor; and (g) manually operable means for moving said connecting gear into either of said positions.

Claim 15

A combination as defined in claim 11 in which there is an advance speed drive means driving gear movable between two positions, one of which position connects said advance speed drive means to said motor and the other position connecting said gear to a lock means whereby the locking of said gear locks said advance feed drive means from operation.