US3950857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layout tool
Assignee: Individual
•
Filing: 1975-01-27
•
Granted: 1976-04-20
•
Expires: 1995-01-27
Abstract
Abstract A layout tool for marking for cut out on the back of a panel or the like the outline of an electrical box. The tool comprises a bridge member having an outward boss and point and a layout bar having at one end an opening adapted to receive the boss, and on the opposite side of the opening, a second point. A blade is movable along the bar and may be set to the respective sides of the box when the opening of the bar receives the first point so that the setting may be transferred to the back of the panel as the point on the bar is made to coincide with an indentation made on the panel by the first point.
Inventors
- 👤 Joseph J. Zanavich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
B; B25; B25H; B25H7/00; Y; Y10; Y10S; Y10S33/00; Y10S33/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
221 words
A layout tool for use in marking for cutout the outline of an electrical box and the like on sheet material such as panelling to be installed over the box, comprising in combination a bridge member and means for securing it across the mouth of the electrical box, the bridge member having an outwardly-facing circular boss terminating in an outwardly-facing first point means, and a layout bar having at one end on one lateral face opening means for swivelly and removably receiving the circular boss of the bridge member and having second point means on the opposite lateral face aligned with said opening means, the second point means being oriented to point in the same direction as the first point means when the opening means receives the circular boss, and a layout blade means adjustably disposed along the layout bar and disposed transversely with respect thereto whereby the first point means can be used to make an impression on the rear face of the panelling, and an outline of the box can be marked on the rear face of the panelling using the second point means in the impression with the blade means set on the bar distances corresponding to the distances from the boss to the respective sides of the box when the opening on the bar receives the boss.
Claim 2
Dependent Claim
221 words
A layout tool for use in marking for cutout the outline of an electrical box and the like on sheet material such as panelling to be installed over the box, comprising in combination a bridge member and means for securing it across the mouth of the electrical box, the bridge member having an outwardly-facing circular boss terminating in an outwardly-facing first point means, and a layout bar having at one end on one lateral face opening means for swivelly and removably receiving the circular boss of the bridge member and having second point means on the opposite lateral face aligned with said opening means, the second point means being oriented to point in the same direction as the first point means when the opening means receives the circular boss, and a layout blade means adjustably disposed along the layout bar and disposed transversely with respect thereto whereby the first point means can be used to make an impression on the rear face of the panelling, and an outline of the box can be marked on the rear face of the panelling using the second point means in the impression with the blade means set on the bar distances corresponding to the distances from the boss to the respective sides of the box when the opening on the bar receives the boss.
Claim 3
Dependent Claim
48 words
A layout tool as claimed in claim 1 wherein the blade means is secured on the bar means by having a clamping plate secured to the blade and fastening means releaseably urging the blade and plate toward each other, the bar being disposed between the plate and blade.
Claim 4
Dependent Claim
26 words
A layout tool as claimed in claim 2 wherein the fastening means comprise a pair of spaced threaded elements, one on either side of the bar.
Claim 5
Dependent Claim
25 words
A layout tool as claimed in claim 1 wherein the circular boss is disposed on a block secured in the center of the bridge element.
Claim 6
Dependent Claim
55 words
A layout tool as claimed in claim 4 wherein the bridge member is formed with elongated slot means and the means for securing comprise threaded fasteners extending through the slot means and adapted to engage threaded openings on either side of the mouth of the electrical box to firmly hold the bridge in fixed position.
References Cited (Backward Citations)
US2349567A
Cited
US3823754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |