US3895732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical junction and switch boxes
Assignee: CARLON COMPANY
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Filing: 1974-02-01
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Granted: 1975-07-22
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Expires: 1994-02-01
Abstract
Abstract A molded synthetic resin box mountable in walls and ceilings for enclosing the ends of electrical conductors and providing access through a switch plate or socket to terminals or contacts connected to such conductor ends. The box has at least one integrally molded break-out window extending between two walls of the box at an acute angle to the two adjacent walls. Each window includes a removable panel retained in a surrounding opening by two bridge webs on opposite sides thereof. A pair of substantially parallel guide ribs are provided on the inner side of each panel and extend at right angles to the bridge webs. The surfaces of the panel, ribs and webs lie in planes facilitating molding of the box by a single step, straight draw molding process. Mounting screw holes are formed in the box, and spring metal screw retaining clips are mounted in the holes.
Inventors
- 👤 Richard L Robinson
- 👤 Ivan L Volgyesy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:05
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/18; H02G3/081; H02G3/083; H02G3/085; Y; Y10; Y10S; Y10S411/00; Y10S411/918
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
106 words
A molded synthetic resin electrical service box comprising: at least two walls intersecting each other at substantially a right angle; and a break-out window extending between said intersecting walls at an acute angle to each of said intersecting walls, said breakout window comprising: a removable panel in a surrounding opening spacing the panel from the remainder of the box; a pair of bridge webs bridging across said opening and connecting opposite sides of the panel with said two intersecting walls; and a pair of guide ribs on the side of said removable panel facing the inside of said box and defining a tool receiving space therebetween.
Claim 2
Dependent Claim
106 words
A molded synthetic resin electrical service box comprising: at least two walls intersecting each other at substantially a right angle; and a break-out window extending between said intersecting walls at an acute angle to each of said intersecting walls, said breakout window comprising: a removable panel in a surrounding opening spacing the panel from the remainder of the box; a pair of bridge webs bridging across said opening and connecting opposite sides of the panel with said two intersecting walls; and a pair of guide ribs on the side of said removable panel facing the inside of said box and defining a tool receiving space therebetween.
Claim 3
Dependent Claim
73 words
A molded synthetic resin electrical service box as defined in claim 1 wherein said removable panel is a frustum of a pyramid having an exposed outer face lying in a plane extending at an acute angle to said intersecting side walls; an inside surface extending substantially parallel to said outer face; and side edges between the outer face and inside surface, and each extending substantially parallel to one of said two intersecting walls.
Claim 4
Dependent Claim
35 words
A molded synthetic resin electrical service box as defined in claim 1 wherein said bridge webs are aligned with each other and each is connected to, and molded integrally with, one of said guide ribs.
Claim 5
Dependent Claim
43 words
A molded synthetic resin electrical service box as defined in claim 1 wherein said opening surrounding said removable panel has a width at all points therealong, as measured between the panel and the box, of from about 0.04 inch to about 0.06 inch.
Claim 6
Dependent Claim
45 words
A molded synthetic resin electrical service box as defined in claim 1 wherein said guide ribs extend parallel to each other, and each of said guide ribs is of triangular cross-section having two exposed sides each extending parallel to one of said two intersecting walls.
Claim 7
Dependent Claim
35 words
A molded synthetic resin electrical service box as defined in claim 2 wherein said bridge webs are aligned with each other and each is connected to, and molded integrally with, one of said guide ribs.
Claim 8
Dependent Claim
43 words
A molded synthetic resin electrical service box as defined in claim 2 wherein said opening surrounding said removable panel has a width at all points therealong, as measured between the panel and the box, oF from about 0.04 inch to about 0.06 inch.
Claim 9
Dependent Claim
45 words
A molded synthetic resin electrical service box as defined in claim 2 wherein said guide ribs extend parallel to eah other, and each of said guide ribs is of triangular cross-section having two exposed sides each extending parallel to one of said two intersecting walls.
Claim 10
Dependent Claim
43 words
A molded synthetic resin electrical service box as defined in claim 6 wherein said opening surrounding said removable panel has a width at all points therealong, as measured between the panel and the box, of from about 0.04 inch to about 0.06 inch.
Claim 11
Dependent Claim
45 words
A molded synthetic resin electrical service box as defined in claim 9 wherein said guide ribs extend parallel to each other, and each of said guide ribs is of triangular cross-section having two exposed sides each extending parallel to one of said two intersecting walls.
Claim 12
Dependent Claim
58 words
A molded synthetic resin electrical service box as defined in claim 1 wherein said box is open at one side thereof, and said box is further characterized in including: screw hole defining tubular portions on walls of the box at a location adjacent and facing the open side thereof; and screw retaining clips pressed into said tubular portions.
Claim 13
Dependent Claim
53 words
A molded synthetic resin electrical service box as defined in claim 11 wherein each of said screw retaining clips includes barbs impaling the synthetic resin of the box constituting the respective tubular portion in which the clip is located; and cooperating screw engaging flanges adapted to collectively engage the threads of a screw.
Claim 14
Dependent Claim
76 words
A molded synthetic resin electrical service box as defined in claim 11 wherein each of said screw retaining clips is a metal member bent to a triangular cross-sectional configuration to provide three opposite side portions, and each of said clips further comprises: means for fixing the position of the clip in one of said tubular portions by engagement therewith; and means for engaging the threads of a screw extended into said clip between said side portions.
Claim 15
Dependent Claim
73 words
A molded synthetic resin electrical service box as defined in claim 13 wherein said removable panel is a frustum of a pyramid having an exposed outer face lying in a plane extending at an acute angle to said intersecting side walls; an inside surface extending substantially parallel to said outer face; and side edges between the outer face and inside surface, and each extending substantially parallel to one of said two intersecting walls.
Claim 16
Dependent Claim
35 words
A molded synthetic resin electrical service box as defined in claim 14 wherein said bridge webs are aligned with each other and each is connected to, and molded integrally with, one of said guide ribs.
Claim 17
Dependent Claim
43 words
A molded synthetic resin electrical service box as defined in claim 14 wherein said opening surrounding said removable panel has a width at all points therealong, as measured between the panel and the box, of from about 0.04 inch to about 0.06 inch.
Claim 18
Dependent Claim
45 words
A molded synthetic resin electrical service box as defined in claim 16 wherein said guide ribs extend parallel to each other, and each of said guide ribs is of triangular cross-section having two exposed sides each extending parallel to one of said two intersecting walls.
References Cited (Backward Citations)
US1967193A
Cited
US1962317A
Cited
US2038291A
Cited
US2149719A
Cited
US3455201A
Cited
US3438534A
Cited
US3701451A
Cited
US3770873A
Cited
US3773968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |