Patent US3733862A successfully refreshed from Google Patents.
US3733862A
Expired / Lapsed
US
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Combined mechanical and photoelectric lock
Assignee: Individual
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Filing: 1971-06-22
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Granted: 1973-05-22
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Expires: 1991-06-22
Abstract
Abstract A combined mechanical and photoelectric lock. The mechanical lock is a conventional key operated tumbler lock. One portion of the key is provided either with a series of small holes or with an insert having a pattern of light and dark areas. A light beam is directed through the holes or the insert and is focused by an optical system on a photodetector which determines whether the projected pattern is valid or invalid.
Inventors
- 👤 W Killmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:57
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/02; E; E05; E05B; E05B49/00; E05B49/002; E05B49/006; Y; Y10; Y10S; Y10S70/00; Y10S70/51; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7062
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A combined mechanical and photoelectric lock comprising: a key operated mechanical lock; a key for operating the mechanical lock, the key having an opening extending therethrough; an insert secured to the key, covering the opening, and having a plurality of light transmitting areas; a light source projecting a beam of light onto the insert when the key is inserted into the lock to project an image of the light transmitting areas; a photoelectric detector for receiving the projected image; and circuit means responsive to the detector for determining if the projected image corresponds to a predetermined image.
Claim 2
Dependent Claim
97 words
A combined mechanical and photoelectric lock comprising: a key operated mechanical lock; a key for operating the mechanical lock, the key having an opening extending therethrough; an insert secured to the key, covering the opening, and having a plurality of light transmitting areas; a light source projecting a beam of light onto the insert when the key is inserted into the lock to project an image of the light transmitting areas; a photoelectric detector for receiving the projected image; and circuit means responsive to the detector for determining if the projected image corresponds to a predetermined image.
Claim 3
Dependent Claim
17 words
The lock according to claim 1 further including a lens for focusing the image onto the detector.
Claim 4
Dependent Claim
19 words
The lock according to claim 1 wherein the insert is a piece of microfilm having transparent and opaque areas.
Claim 5
Dependent Claim
41 words
The lock according to claim 1 wherein the light source and the detector are so located that the key intersects the light beam so as to produce the image when the key is in its unlocked position in the mechanical lock.
Claim 6
Dependent Claim
41 words
The lock according to claim 1 wherein the light source and the detector are so located that the key intersects the light beam so as to produce the image when the key is in its locked position in the mechanical lock.
Claim 7
Dependent Claim
15 words
The lock according to claim 1 wherein the mechanical lock is a tumbler type lock.
Claim 8
Dependent Claim
113 words
A two criteria lock, comprising: a key operated mechanical lock; a key for operating the mechanical lock, the key having at least one hole extending therethrough; an insert carried by the key and covering the hole, the insert having an identifying pattern of opaque and translucent areas; means for projecting a beam of light onto the insert; and photoelectric detector means located on the opposite side of the key from the light projecting means for receiving the portion of the light beam which passes through the insert, the detector means including means for comparing the projected portion of the light beam with a predetermined pattern to determine the authenticity of the projected portion.
Claim 9
Dependent Claim
113 words
A two criteria lock, comprising: a key operated mechanical lock; a key for operating the mechanical lock, the key having at least one hole extending therethrough; an insert carried by the key and covering the hole, the insert having an identifying pattern of opaque and translucent areas; means for projecting a beam of light onto the insert; and photoelectric detector means located on the opposite side of the key from the light projecting means for receiving the portion of the light beam which passes through the insert, the detector means including means for comparing the projected portion of the light beam with a predetermined pattern to determine the authenticity of the projected portion.
Claim 10
Dependent Claim
22 words
The lock according to claim 7 wherein the key has a recess surrounding the hole, the insert being received within the recess.
Claim 11
Dependent Claim
14 words
The lock according to claim 8 wherein the insert is a piece of microfilm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |