US4875510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dovetail machine
Assignee: Individual
•
Filing: 1989-02-21
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Granted: 1989-10-24
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Expires: 2009-02-21
Abstract
Abstract A dovetailing jig has a base with a flat top surface notched along the back edge. A back on the jig has a flat front surface that is positioned above and at the rear of the top surface of the base while two side plates provide confronting flat side faces. Two clamping cylinders extend between the side plates to clamp work pieces to the top surface of the base and to the front surface of the back. In use, the jig slides on a bench surface equipped with a stationary router blade.
Inventors
- 👤 John H. Muellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:57
CPC Classifications
B; B27; B27F; B27F1/00; B27F1/08; B27F1/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
218 words
A dovetailing jig for use with a fixed dovetailing bit projecting from a bench surface, said jig comprising: a base having a flat bottom surface for supporting the jig on the bench surface, a flat top surface for supporting a first work piece and a plurality of notches spaced along a back edge of the base for guiding the jig onto the bit as the jig slides on the bench surface; a back having a flat front surface and a bottom edge; means securing the back to the base with the flat front surface of the back perpendicular to the top surface of the base for supporting a second work piece, and with the bottom edge spaced above the top surface of the base; a base clamp comprising a first elongated member positioned above and parallel to the top surface of the base and means mounting the first elongated member for selective movement towards and away from the top surface thereby selectively to hold the first work piece on the top surface; a back clamp comprising a second elongated member positioned in front of and parallel to the front surface and means mounting the second elongated member for selective movement towards and away from the front surface thereby selectively holding the second work piece on the front surface.
Claim 2
Dependent Claim
218 words
A dovetailing jig for use with a fixed dovetailing bit projecting from a bench surface, said jig comprising: a base having a flat bottom surface for supporting the jig on the bench surface, a flat top surface for supporting a first work piece and a plurality of notches spaced along a back edge of the base for guiding the jig onto the bit as the jig slides on the bench surface; a back having a flat front surface and a bottom edge; means securing the back to the base with the flat front surface of the back perpendicular to the top surface of the base for supporting a second work piece, and with the bottom edge spaced above the top surface of the base; a base clamp comprising a first elongated member positioned above and parallel to the top surface of the base and means mounting the first elongated member for selective movement towards and away from the top surface thereby selectively to hold the first work piece on the top surface; a back clamp comprising a second elongated member positioned in front of and parallel to the front surface and means mounting the second elongated member for selective movement towards and away from the front surface thereby selectively holding the second work piece on the front surface.
Claim 3
Dependent Claim
45 words
A jig according to claim 1 wherein the means mounting the back on the base includes at least one side having a flat side surface perpendicular to the top and front surfaces for engaging a side edge of at least one of the work pieces.
Claim 4
Dependent Claim
40 words
A jig according to claim 2 including a spacer extending along the side surface for engaging a side edge of said at least one of the work pieces and spacing said side edge a predetermined distance from the side surface.
Claim 5
Dependent Claim
17 words
A jig according to claim 3 wherein the spacer extends along the front surface of the back.
Claim 6
Dependent Claim
46 words
A jig according to claim 1 wherein the means for securing the back to the base include two sides spaced apart to provide two flat side surfaces confronting one another and perpendicular to the top and front surfaces for engaging side edges of respective work pieces.
Claim 7
Dependent Claim
33 words
A jig according to claim 5 including two spacers extending along the respective side surfaces and along the front surface of the back for engaging the side edges of respective second work pieces.
Claim 8
Dependent Claim
20 words
A jig according to claim 1 wherein the first elongated member comprises a cylinder parallel to the base support surface.
Claim 9
Dependent Claim
39 words
A jig according to claim 7 wherein the means mounting the first elongated member comprise a pair of pivot arms, each pivotally connected to a fixed location on the jig and connected to a respective end of the cylinder.
Claim 10
Dependent Claim
61 words
A jig according to claim 8 wherein each pivot arm is pivotally connected to the respective fixed location on the jig at one end of the pivot arm, and including means for guiding the opposite end of each pivot arm for movement through an arc, the associated end of the cylinder being connected to the pivot arm intermediate the ends thereof.
Claim 11
Dependent Claim
20 words
A jig according to claim 9 including a lever arm secured to the cylinder and projecting upwardly and forwardly therefrom.
Claim 12
Dependent Claim
23 words
A jig according to claim 1 wherein the second elongated member of the back clamp comprises a cylinder parallel to the front surface.
Claim 13
Dependent Claim
39 words
A jig according to claim 11 wherein the means mounting the second elongated member comprise a pair of pivot arms each pivotally connected to a fixed location on the jig and connected to a respective end of the cylinder.
Claim 14
Dependent Claim
59 words
A jig according to claim 12 wherein each pivot arm is pivotally connected to the jig at one end of the pivot arm and including means for guiding the opposite end of each pivot arm for movement through an arc, the ends of the cylinder being connected to the respective pivot arms intermediate the ends of the pivot arm.
Claim 15
Dependent Claim
20 words
A jig according to claim 13 including a lever arm secured to the cylinder and projecting outwardly and forwardly therefrom.
Claim 16
Dependent Claim
22 words
A jig according to claim 1 wherein the back comprises a channel section, with a web thereof providing the flat front surface.
Claim 17
Dependent Claim
13 words
A jig according to claim 15 wherein the base comprises a base plate.
Claim 18
Dependent Claim
26 words
A jig according to claim 16 wherein the base further comprises a spacer plate below the base plate and forwardly of the notches in the base.
References Cited (Backward Citations)
US478544A
Cited
US610272A
Cited
US2225263A
Cited
US2299602A
Cited
US2764191A
Cited
US2893449A
Cited
US3109466A
Cited
US3800840A
Cited
US4163465A
Cited
US4632159A
Cited
US4809755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |