Patent US3729265A successfully refreshed from Google Patents.
US3729265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shadow-line device with a structurally independent guideway
Assignee: Individual
•
Filing: 1970-10-08
•
Granted: 1973-04-24
•
Expires: 1990-10-08
Abstract
Abstract A device for projecting shadow lines on a work surface, at least certain of these lines being shiftable in response to control system, the movable projector assemblies being mounted on carries supported on a guideway formed by a relatively heavy rail with flange grooves, the rail being supported by the frame of the device so as to leave the rail in relatively stress-free condition.
Inventors
- 👤 A Carter
- 👤 C Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
B; B27; B27B; B27B31/00; B27B31/06; Y; Y10; Y10T; Y10T83/00; Y10T83/849; Y10T83/853
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A shadow line projector having a frame, guideway means mounted on said frame, at least one carrier mounted for movement along said guideway means, a light source mounted on said carrier, shadow line suspension means mounted on said carrier, and cable means establishing the position of said carrier along said guideway, wherein the improvement comprises: a unitary channel-shaped rail having a web and also havinG parallel side flanges provided with opposite grooves forming said guideway means, said rail being normally secured to said frame and having relatively greater torsional and bending rigidity than said frame, said carrier including plate means interposed between said flanges and having roller means engaging said grooves, said cable means having at least one course disposed between said flanges and secured to said plate means.
Claim 2
Dependent Claim
129 words
A shadow line projector having a frame, guideway means mounted on said frame, at least one carrier mounted for movement along said guideway means, a light source mounted on said carrier, shadow line suspension means mounted on said carrier, and cable means establishing the position of said carrier along said guideway, wherein the improvement comprises: a unitary channel-shaped rail having a web and also havinG parallel side flanges provided with opposite grooves forming said guideway means, said rail being normally secured to said frame and having relatively greater torsional and bending rigidity than said frame, said carrier including plate means interposed between said flanges and having roller means engaging said grooves, said cable means having at least one course disposed between said flanges and secured to said plate means.
Claim 3
Dependent Claim
27 words
A device as defined in claim 1, wherein said cable means includes a length of cable having courses disposed on opposite sides of said of said web.
Claim 4
Dependent Claim
23 words
A device as defined in claim 2, wherein said rail has flanges tapering in thickness, the maximum thickness thereof being adjacent said web.
Claim 5
Dependent Claim
55 words
A device as defined in claim 2, wherein said frame includes a housing having an opening along one side, and having inwardly turned flanges along the edges defining said opening, the edges of said rail flanges normally being received on said housing flanges, and said grooves are disposed on the inside of said rail flanges.
Claim 6
Dependent Claim
47 words
A device as defined in claim 1, wherein said carrier has at least one roller engaging the other of said grooves, said other roller being mounted on an eccentric member pivotally secured to said carrier to adjustably position said one roller toward and away from said groove.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |