US3595132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth-controlled drill presses
Assignee: Individual
•
Filing: 1969-05-12
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Granted: 1971-07-27
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Expires: 1989-05-12
Abstract
Abstract A depth-controlled drill press having a supporting means including a head slidably mounted in the body of said supporting means and manually movable toward and from a work rest carried by the body, a quill rotatably mounted in said body and held from axial movement, a motor rotating said quill, a tool supporting spindle received within said quill guided for axial movement and restrained from rotation relative to the quill. The upper end of the spindle is held attached to said head by an electromagnet and pushed away from the work by a spring when the electromagnet is deenergized by circuitry actuated upon the tool engaging a metallic member in the work.
Inventors
- 👤 Ralph S Thacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:47
CPC Classifications
B; B23; B23C; B23C1/00; B23C1/06; B23Q; B23Q5/00; B23Q5/22; B23Q5/52; B23Q2705/00; B23Q2705/22; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/173; Y10T408/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A depth-controlled drill press comprising: a. supporting means b. a quill mounted in said supporting means, c. a work rest carried by said supporting means, d. a spindle carried by said quill and guided for rotational and axial movement toward and from said work rest, e. an end cutter carried by said spindle, f. feed means for feeding the spindle and cutter toward the work rest, g. shifting means for moving said spindle and the cutter away from the work rest independently of the feed means while the spindle is rotating, h. control means for actuating said shifting means when the cutter has made contact with the metal of the work i. and power means for continuously rotating said spindle.
Claim 2
Dependent Claim
120 words
A depth-controlled drill press comprising: a. supporting means b. a quill mounted in said supporting means, c. a work rest carried by said supporting means, d. a spindle carried by said quill and guided for rotational and axial movement toward and from said work rest, e. an end cutter carried by said spindle, f. feed means for feeding the spindle and cutter toward the work rest, g. shifting means for moving said spindle and the cutter away from the work rest independently of the feed means while the spindle is rotating, h. control means for actuating said shifting means when the cutter has made contact with the metal of the work i. and power means for continuously rotating said spindle.
Claim 3
Dependent Claim
79 words
A depth-controlled drill press for use in removing the outer layer of insulation from a flat conductor mounted on an insulating board according to claim 1 in which a. the shifting means including b. electromagnetic means having a normally closed electromagnet circuit holding said spindle with the cutter in operating position for advancement by the feed means toward the work c. a control circuit including normally open trigger circuit having means adapted upon energization to deenergize said electromagnet circuit,
Claim 4
Dependent Claim
39 words
A depth-controlled drill press according to claim 1 in which: a. the shifting means includes b. an electromagnet and c. a magnetic member cooperating with said electromagnet to control the movement of the spindle independently of the feed means.
Claim 5
Dependent Claim
29 words
A depth-controlled drill press according to claim 3 in which: a. the electromagnet is mounted on the supporting means, and b. the magnetic member is mounted on the spindle.
Claim 6
Dependent Claim
37 words
A depth-controlled drill press according to claim 4 in which: a. the electromagnet has an inverted conical socket and, b. the magnetic member is conical and is adapted to be attracted by the core of the electromagnet.
Claim 7
Dependent Claim
37 words
A depth-controlled drill press according to claim 4 in which: a. the supporting means has a head and b. a body with c. guide means for guiding said head for movement toward and from the work rest.
Claim 8
Dependent Claim
58 words
A depth-controlled drill press according to claim 6 in which: a. the electromagnet has a core which is mounted on the head and has an upwardly facing conical socket and b. the magnetic member is mounted on the spindle above the core of the electromagnet and has an inverted conical surface engageable with the socket in the cone.
Claim 9
Dependent Claim
40 words
A depth-controlled drill press according to claim 7 in which: a. a spring is mounted between the body of the housing and the spindle and moves the spindle and cutter away from the work rest when the electromagnet is deenergized.
Claim 10
Dependent Claim
49 words
A depth-controlled drill press accordingly to claim 8 in which: a. a normally closed electromagnetic circuit actuates the electromagnet and b. a normally open inversion circuit having the metal of the work and cutter in circuit and upon energization by the cutter engaging said metal, deenergizing the electromagnetic circuit.
Claim 11
Dependent Claim
26 words
A depth-controlled drill press according to claim 9 in which: a. a relay is employed actuated by the inversion circuit and b. deenergizing the electromagnetic circuit.
Claim 12
Dependent Claim
70 words
A depth-controlled drill press according to claim 10 in which: a. a two-terminal connector is employed adapted to be connected in series with the controlled terminals of the relay and b. energized by the same source of electricity as the inversion circuit is energized by, c. a pilot lamp is connected across the input to the relay and d. another pilot lamp is connected across the coil of said electromagnet
Claim 13
Dependent Claim
21 words
A depth-controlled drill press according to claim 9 in which: a. time-controlled delay means delays the opening of the electromagnetic circuiT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |