US3592973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Code cards for automatic telephone dialling
Assignee: SANTRANIC Ltd
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Filing: 1969-02-11
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Granted: 1971-07-13
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Expires: 1989-02-11
Abstract
Abstract A card blank for providing a coded dialling card for carddialling apparatus in automatic telephone systems has a plurality of recessed apertures therethrough each obscured by an opaque screen removably mounted in the recessed portions of the apertures, the maximum transverse dimensions of the screen being substantially identical with the minimum transverse dimensions of the unrecessed portion. The screens substantially prevent all direct illumination from passing through the apertures.
Inventors
- 👤 Derek Keith Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:18
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/274; H04M1/278
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
A card blank for providing a coded dialling card for a carddialling apparatus including photoelectic sensors in automatic telephone apparatus, comprising: a main body in the form of a plate having a set of preformed apertures passing therethrough, said main body being of plastics material; each of said apertures having a larger part at one end thereof and a smaller part at the other end; a wall portion of said body surrounding each of said apertures having a stepped configuration defining a shoulder which separates the larger and the smaller parts of each said aperture; an opaque screen positioned within each said aperture and axially located to one side of said shoulder and disposed in the larger part of said aperture, said opaque screen being of at least the same dimensions as the smaller part of said aperture and also being centered relative to said smaller part thereby wholly to mask said smaller part; and a plurality of legs interconnecting each said screen to said body to hold each said screen in position in its respective aperture while permitting said screen to be detached from said body by fracture of said legs, the screens and their legs being of plastics material integrally connected with said body.
Claim 2
Dependent Claim
206 words
A card blank for providing a coded dialling card for a carddialling apparatus including photoelectic sensors in automatic telephone apparatus, comprising: a main body in the form of a plate having a set of preformed apertures passing therethrough, said main body being of plastics material; each of said apertures having a larger part at one end thereof and a smaller part at the other end; a wall portion of said body surrounding each of said apertures having a stepped configuration defining a shoulder which separates the larger and the smaller parts of each said aperture; an opaque screen positioned within each said aperture and axially located to one side of said shoulder and disposed in the larger part of said aperture, said opaque screen being of at least the same dimensions as the smaller part of said aperture and also being centered relative to said smaller part thereby wholly to mask said smaller part; and a plurality of legs interconnecting each said screen to said body to hold each said screen in position in its respective aperture while permitting said screen to be detached from said body by fracture of said legs, the screens and their legs being of plastics material integrally connected with said body.
Claim 3
Dependent Claim
23 words
A card blank according to claim 1, wherein said main body, said legs and said screen are integrally molded from a thermoplastics material.
Claim 4
Dependent Claim
45 words
A card blank according to claim 1, wherein the screen has a thickness substantially less than the thickness of the main body, and said legs being provided with a sharp notch or corner which functions as a stress raiser to facilitate fracture of the legs.
Claim 5
Dependent Claim
32 words
A card blank according to claim 1, wherein the surface of said screen facing outwards of said main body is substantially coplanar with the corresponding surface of the body of the card.
Claim 6
Dependent Claim
31 words
A card blank according to claim 1, wherein said legs extend from the surface of said screen facing said shoulder to the stepped part of the wall of the said aperture.
Claim 7
Dependent Claim
29 words
A card blank according to claim 1, wherein the number of legs connected to each screen is three, said legs being equally spaced around the perimeter of the screen.
Claim 8
Dependent Claim
42 words
A card blank according to claim 6, wherein the aperture and the screen are of circular shape, and wherein the wall portion surrounding the smaller part of said aperture is frustoconical with its innermost end adjacent said shoulder being the smaller dimension.
Claim 9
Dependent Claim
23 words
A card blank according to claim 7, wherein the said surface of the screen facing said shoulder is, at least in part, concave.
Claim 10
Dependent Claim
31 words
A card blank according to claim 7, wherein the wall portion surrounding the larger part of said aperture is frustoconical with its innermost end adjacent said shoulder being the smaller dimeNsion.
Claim 11
Dependent Claim
50 words
A card blank according to claim 1, wherein the said apertures are arranged in a plurality of rows and for each row there is provided a locating aperture to receive locating means of a card-dialling apparatus the locating apertures being staggered relative to the rows of the first said apertures.
References Cited (Backward Citations)
US3114036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |