US4520749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checklist device
Assignee: Individual
•
Filing: 1983-05-06
•
Granted: 1985-06-04
•
Expires: 2003-05-06
Abstract
Abstract A device that contains a pocket wherein checklist cards can be inserted that match with pushbuttons that are used to indicate completion of certain steps in a series of steps.
Inventors
- 👤 David A. Jefferson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:51
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
A device for indicating that a series of steps have been performed or not performed comprising a container having a pair of planar members disposed in parallel relationship with each other; a shim means positioned between said members and forming a pocket therebetween, each of said members having a peripheral border about said pocket, said border being formed with a plurality of openings to receive indicator buttons; a card having a series of columnar steps imprinted thereon adapted for reception by said pocket, at least one of said planar members being transparent in the area over said pocket to expose said steps when said card is in said pocket; and a plurality of manually operated indicator buttons disposed along said border adjacent each of said steps, each of said indicator buttons having a length greater than the thickness of said two members whereby said button, when flush with the exterior of one of said members extends beyond the exterior of the other of said members and each of said indicator buttons having a reduced area formed with protuberances intermediate the ends of said button.
Claim 2
Independent Claim
184 words
A device for indicating that a series of steps have been performed or not performed comprising a container having a pair of planar members disposed in parallel relationship with each other; a shim means positioned between said members and forming a pocket therebetween, each of said members having a peripheral border about said pocket, said border being formed with a plurality of openings to receive indicator buttons; a card having a series of columnar steps imprinted thereon adapted for reception by said pocket, at least one of said planar members being transparent in the area over said pocket to expose said steps when said card is in said pocket; and a plurality of manually operated indicator buttons disposed along said border adjacent each of said steps, each of said indicator buttons having a length greater than the thickness of said two members whereby said button, when flush with the exterior of one of said members extends beyond the exterior of the other of said members and each of said indicator buttons having a reduced area formed with protuberances intermediate the ends of said button.
Claim 3
Dependent Claim
30 words
The device of claim 1 wherein said shim has openings coaxial with said border openings and greater in size than said reduced portion but lesser in size than said protuberances.
Claim 4
Dependent Claim
197 words
A push-button assembly comprising a pair of planar members disposed in parallel relationship with each other, said members having overlaying openings of a first cross sectional area to provide a continuous opening through said members; a shim means positioned between said members and forming a space therebetween, said shim having an opening of a second cross sectional area aligned with said openings in said members, said second cross sectional area being smaller than said first cross sectional area; and a button positioned in the space provided by said aligned openings in said members and said shim, said button having a length greater than the combined thicknesses of said members and said shim whereby said button, when flush with the exterior of one of said members, extends beyond the exterior of the other of said members, and said button further having an intermediate section with intermediate end portions and an enlarged central portion, the cross sectional area of said intermediate end portions being less than said first and second cross sectional areas and the cross sectional area of said enlarged central portion being less than said first cross sectional area and greater than said second cross sectional area.
Claim 5
Dependent Claim
197 words
A push-button assembly comprising a pair of planar members disposed in parallel relationship with each other, said members having overlaying openings of a first cross sectional area to provide a continuous opening through said members; a shim means positioned between said members and forming a space therebetween, said shim having an opening of a second cross sectional area aligned with said openings in said members, said second cross sectional area being smaller than said first cross sectional area; and a button positioned in the space provided by said aligned openings in said members and said shim, said button having a length greater than the combined thicknesses of said members and said shim whereby said button, when flush with the exterior of one of said members, extends beyond the exterior of the other of said members, and said button further having an intermediate section with intermediate end portions and an enlarged central portion, the cross sectional area of said intermediate end portions being less than said first and second cross sectional areas and the cross sectional area of said enlarged central portion being less than said first cross sectional area and greater than said second cross sectional area.
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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |