US3982828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eye testing apparatus
Assignee: South African Inventions Development Corp
•
Filing: 1975-08-07
•
Granted: 1976-09-28
•
Expires: 1995-08-07
Abstract
Abstract Eye testing apparatus including a control unit having a control display panel having a number of distributed electrical lights adapted to be illuminated; and electrical connection means for connecting the control unit to a source of electrical energy; a remote scanner unit adapted to be electrically connected to the control unit, and including a scanner display panel provided with electrical lights, positioned corresponding to the lights on the control display panel, and which are adapted to be illuminated corresponding to the illumination of the lights on the control display panel, the scanner display panel also having a fixing light; and operation means for causing any one or more lights on the control display panel and the corresponding light or lights on the scanner display panel to be illuminated for observation by a person viewing the scanner display panel.
Inventors
- 👤 Bernard Nathan Woolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:12
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
139 words
An eye testing apparatus including a control unit having a control display panel having a number of distributed electrical lights adapted to be illuminated; an electrical connection means for connecting the control unit to a source of electrical energy; a remote scanner unit adapted to be electrically connected to the control unit, and including a scanner display panel provided with electrical lights, positioned corresponding to the lights on the control display panel, and which are adapted to be illuminated corresponding to the illumination of the lights on the control display panel, the scanner display panel also having a fixing light; and operation means for causing any one or more lights on the control display panel and the corresponding light or lights on the scanner display panel to be illuminated for observation by a person viewing the scanner display panel.
Claim 2
Dependent Claim
139 words
An eye testing apparatus including a control unit having a control display panel having a number of distributed electrical lights adapted to be illuminated; an electrical connection means for connecting the control unit to a source of electrical energy; a remote scanner unit adapted to be electrically connected to the control unit, and including a scanner display panel provided with electrical lights, positioned corresponding to the lights on the control display panel, and which are adapted to be illuminated corresponding to the illumination of the lights on the control display panel, the scanner display panel also having a fixing light; and operation means for causing any one or more lights on the control display panel and the corresponding light or lights on the scanner display panel to be illuminated for observation by a person viewing the scanner display panel.
Claim 3
Dependent Claim
31 words
An eye testing apparatus as claimed in claim 1, in which each light is provided with an electrical contact by means of which such light can be caused to be illuminated.
Claim 4
Dependent Claim
26 words
An eye testing apparatus as claimed in claim 2, in which the electrical contact is in the form of an electrically conducting sheath surrounding the light.
Claim 5
Dependent Claim
46 words
An eye testing apparatus as claimed in claim 1, in which the operation means includes an electrically conducting marking device, connected by means of a cable to the control unit, and on contact with the electrical contact of a light causing such light to be illuminated.
Claim 6
Dependent Claim
19 words
An eye testing apparatus as claimed in claim 1, including flashing means for illuminating the lights in flashing manner.
Claim 7
Dependent Claim
25 words
An eye testing apparatus as claimed in claim 5, which includes duration adjustment means for varying the period and duration of flash of the lights.
Claim 8
Dependent Claim
41 words
An eye testing apparatus as claimed in claim 1, in which the scanning unit includes a housing fully enclosing the scanner display panel, the housing having a viewing opening adapted to be placed for observation against the eye of a person.
Claim 9
Dependent Claim
48 words
An eye testing apparatus as claimed in claim 1, in which the scanner unit includes a box shaped housing including the scanner display panel and a funnel shaped hood having a converging part, and a viewing opening being provided in the converging part of the funnel shaped hood.
Claim 10
Dependent Claim
23 words
An eye testing apparatus as claimed in claim 1, which includes light intensity adjusting means for varying the light intensity of the lights.
Claim 11
Dependent Claim
26 words
An eye testing apparatus as claimed in claim 1, in which group control means is provided for allowing a group of lights to be illuminated simultaneously.
Claim 12
Dependent Claim
35 words
An eye testing apparatus as claimed in claim 1, in which the control display panel of the control unit has locating means for locating a test sheet to be placed on the control display panel.
Claim 13
Dependent Claim
45 words
As eye testing apparatus as claimed in claim 11, in which the locating means is provided in that the lights on the control display panel stand proud of the display panel for allowing location of a test sheet provided with openings corresponding to the lights.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |