US3600592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensing folio keyed keyboard
Assignee: United States Department of the Air Force
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Filing: 1969-10-27
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Granted: 1971-08-17
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Expires: 1989-10-27
Abstract
Abstract A photosensing keyboard which is utilized in conjunction with a folio. The folio is mounted on the face of the keyboard. The keyboard has a first and second photosensing means therein. The photosensing means and folio are interrelated in such a manner that the keyboard is capable of detecting the presence of the folio thereon and also the specific page the folio is opened to.
Inventors
- 👤 Ralph E Mahan
- 👤 James K Gerrie
- 👤 James C Lashbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:38
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0238
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A photosensing folio keyed keyboard comprising a keyboard having a face, a plurality of pushbuttons on said keyboard face to be operated in accordance with instructions on a folio, a slot in said keyboard face for receiving a portion of said folio therein, a first photosensing means in said slot for detecting the presence and type of folio and for producing an output in response thereto, and a second photosensing means in said face adjacent said pushbuttons for detecting the page said folio is opened to and for producing an output in response thereto.
Claim 2
Dependent Claim
94 words
A photosensing folio keyed keyboard comprising a keyboard having a face, a plurality of pushbuttons on said keyboard face to be operated in accordance with instructions on a folio, a slot in said keyboard face for receiving a portion of said folio therein, a first photosensing means in said slot for detecting the presence and type of folio and for producing an output in response thereto, and a second photosensing means in said face adjacent said pushbuttons for detecting the page said folio is opened to and for producing an output in response thereto.
Claim 3
Dependent Claim
43 words
A photosensing folio keyed keyboard as defined in claim 1 further comprising at least one raised portion on said keyboard face adjacent said pushbuttons, said raised portion having a plurality of indentations therein and said second photosensing means being located in said indentations.
Claim 4
Dependent Claim
32 words
A photosensing folio keyed keyboard as defined in claim 2 wherein said first photosensing means comprises a photocell and a light source and said photocell being electrically connected to an activating means.
Claim 5
Dependent Claim
45 words
A photosensing folio keyed keyboard as defined in claim 3 wherein said second photosensing means comprises another photocell and another light source, said other photocell being electrically connected to said activating means, whereby concurrent interrupting of both said photocell-light source links energizes said activating means.
Claim 6
Dependent Claim
16 words
A photosensing folio keyboard as defined in claim 4 wherein said activating means is a flip-flop.
Claim 7
Dependent Claim
111 words
The combination of a photosensing folio keyed keyboard and a folio, said folio having a binder and a plurality of pages attached thereto, said keyboard having a face, a plurality of pushbuttons on said keyboard face to be operated in accordance with instructions on said folio, a slot in said keyboard face for receiving said binder of said folio therein, a first photosensing means in said slot for detecting the presence and type of folio and for producing an output in response thereto, and a second photosensing means in said face adjacent said pushbuttons for detecting the page said folio is opened to and for producing an output in response thereto.
Claim 8
Dependent Claim
111 words
The combination of a photosensing folio keyed keyboard and a folio, said folio having a binder and a plurality of pages attached thereto, said keyboard having a face, a plurality of pushbuttons on said keyboard face to be operated in accordance with instructions on said folio, a slot in said keyboard face for receiving said binder of said folio therein, a first photosensing means in said slot for detecting the presence and type of folio and for producing an output in response thereto, and a second photosensing means in said face adjacent said pushbuttons for detecting the page said folio is opened to and for producing an output in response thereto.
Claim 9
Dependent Claim
77 words
The combination of a photosensing folio keyed keyboard and a folio as defined in claim 6 wherein said binder has at least one opening indicative of the type of folio, each of said plurality of pages has a tab thereon indicative of the page, said keyboard face further comprising a raised portion adjacent said pushbuttons, said raised portion having a plurality of indentations therein for receiving said tabs, and said second photosensing means located within said indentations.
Claim 10
Dependent Claim
110 words
A folio adapted to be used with a pushbutton keyboard comprising a binder, a plurality of binder elements pivotally secured to said binder, each of said binder elements having a protruding portion thereon, a plurality of pages, each of said pages have an outstanding element thereon, said protruding portion of each of said binder elements being fixedly secured to a respective outstanding element of each of said pages, said binder having at least one opening therein indicative of the type of folio, said pages having at least one aperture therein to allow a pushbutton to protrude therethrough, and a tab protruding from each of said pages indicative of said page.
Claim 11
Dependent Claim
110 words
A folio adapted to be used with a pushbutton keyboard comprising a binder, a plurality of binder elements pivotally secured to said binder, each of said binder elements having a protruding portion thereon, a plurality of pages, each of said pages have an outstanding element thereon, said protruding portion of each of said binder elements being fixedly secured to a respective outstanding element of each of said pages, said binder having at least one opening therein indicative of the type of folio, said pages having at least one aperture therein to allow a pushbutton to protrude therethrough, and a tab protruding from each of said pages indicative of said page.
Claim 12
Dependent Claim
107 words
A folio as defined in claim 8 wherein said binder elements are in pairs, each binder elements in said pair of binders elements having identical protruding portions thereon, each of said pages being of a predetermined thickness and having a pair of outstanding elements thereon, each of said pair of outstanding elements on each of said pages being fixedly secured to each of said identical protruding portions on identical pairs of binder elements, and each of said binder elements adjacent said pair of identical elements having protruding portions thereon which allow for the mounting thereon of another page at one page thickness difference than the preceding page.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |