US4237382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocoupler device
Assignee: US Philips Corp
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Filing: 1978-04-17
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Granted: 1980-12-02
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Expires: 1998-04-17
Abstract
Abstract A photocoupler device with an insulating element comprising a shield situated perpendicularly to the optical axis of a light emitter and a receiver. The shield comprises a thermoplastic transparent material.
Inventors
- 👤 Jacques C. Thillays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
H; H10; H10F; H10F55/00; H10F55/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
195 words
A photocoupler device comprising: a light emitter having electrical connections; a photosensitive receiver having electrical connections and being situated opposite the light emitter, said emitter and said receiver being coupled optically along an optical axis; an insulating element comprising a substantially planar shield, said shield providing electrical insulation between the light emitter and the photosensitive receiver, and a base, said base being situated in a plane substantially perpendicular to said shield, said base having two faces with said shield being situated on one face, and said base having two branches which are substantially symmetrical with respect to the shield, a profile of the insulating element having substantially the form of a "T", wherein said insulating element comprises an amorphous transparent thermoplastic polyamide; a layer of a dielectric transparent material adhering to and situated between the emitter and the shield; a layer of a dielectric transparent material adhering to and situated between the receiver and shield, the index of refraction and the coefficient of expansion of each of the dielectric materials being near those of the polyamide; and wherein the emitter and the receiver are mounted on separate supports and the base bears on said supports.
Claim 2
Dependent Claim
195 words
A photocoupler device comprising: a light emitter having electrical connections; a photosensitive receiver having electrical connections and being situated opposite the light emitter, said emitter and said receiver being coupled optically along an optical axis; an insulating element comprising a substantially planar shield, said shield providing electrical insulation between the light emitter and the photosensitive receiver, and a base, said base being situated in a plane substantially perpendicular to said shield, said base having two faces with said shield being situated on one face, and said base having two branches which are substantially symmetrical with respect to the shield, a profile of the insulating element having substantially the form of a "T", wherein said insulating element comprises an amorphous transparent thermoplastic polyamide; a layer of a dielectric transparent material adhering to and situated between the emitter and the shield; a layer of a dielectric transparent material adhering to and situated between the receiver and shield, the index of refraction and the coefficient of expansion of each of the dielectric materials being near those of the polyamide; and wherein the emitter and the receiver are mounted on separate supports and the base bears on said supports.
Claim 3
Dependent Claim
22 words
A photocoupler device as claimed in claim 1, wherein characterized in that the profile of the shield is that of a prism.
Claim 4
Dependent Claim
22 words
A photocoupler device as claimed in claim 1, wherein the profile of the shield is that of a plate having parallel faces.
Claim 5
Dependent Claim
28 words
A photocoupler device as claimed in claim 1, wherein the insulating element further comprises a manipulation wing situated on the face of the base opposite to the shield.
Claim 6
Dependent Claim
32 words
A photocoupler device as claimed in claim 4, wherein the shield the manipulation wing and the two branches of the base are substantially identical, the profile of the element being substantially cruciform.
Claim 7
Dependent Claim
26 words
A photocoupler device as claimed in claim 5, wherein the shield has at least two surfaces and at least the surface of the shield is glossy.
Claim 8
Dependent Claim
17 words
A photocoupler device as claimed in claim 6, wherein at least surface of the shield is metallized.
Claim 9
Dependent Claim
22 words
A photocoupler device as claimed in claim 7, wherein the face of the base, which is turned towards the shield, comprises lugs.
Claim 10
Dependent Claim
37 words
A photocoupler device as claimed in claim 1, wherein the difference between the coefficient of expansion of the thermoplastic material and the coefficient of expansion of the said dielectric material is less than 10% of their value.
Claim 11
Dependent Claim
36 words
a photocoupler device as claimed in claim 9, wherein characterized in that the difference between the index of refraction of the dielectric material and that of the thermoplastic material is less than 7% of their value.
Claim 12
Dependent Claim
42 words
A photocoupler device as claimed in claim 10, wherein the characterized in that the said dielectric material is a thermosetting resin of which the conditions of molding and of the polymerization treatment are compatible with a good behavior of the thermoplastic material.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |