US3078613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing boards with counterbalancing mechanism
Assignee: STACOR CORP
•
Filing: 1962-04-11
•
Granted: 1963-02-26
•
Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Morcheles Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
A; A47; A47B; A47B27/00; A47B27/04; A47B27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A COUNTER-BALANCED DRAWING BOARD CONSTRUCTION OF THE CHARACTER DESCRIBED, A FRAME, A DRAWING BOARD, AND A COUNTER-BALANCING UNIT COMPRISING A BRACKET EXTENDING DOWNWARDLY FROM SAID BOARD; SAID BRACKET, NEAR ITS BOTTOM END, BEING SWINGABLY MOUNTED ON THE FRAME FOR MOVEMENT ABOUT A HORIZONTAL AXIS WHICH IS NEARER TO THE FRONT EDGE OF SAID BOARD THAN TO THE REAR EDGE THEREOF, AN EXTENSIBLE AND CONTRACTABLE STRUCTURE INCLUDING A SPRING BIASING SAID STRUCTURE TO CONTRACT, A FIRST PIN CARRIED ON SAID FRAME, IN FRONT OF, RELATIVELY NEAR AND IN FIXED RELATION TO SAID AXIS, AND A SECOND PIN CARRIED BY SAID BRACKET ABOVE SAID AXIS; THE ENDS OF SAID EXTENSIBLE AND CONTRACTABLE STRUCTURE BEING PIVOTALLY LINKED TO SAID PINS RESPECTIVELY; THE RESPECTIVE LOCATIONS OF SAID PINS BEING SUCH THAT THE STRESS IN THE SPRING IS DECREASED AS THE BOARD IS SWUNG FROM A HORIZONTAL POSITION TO ONE WHERE THE SAID BOARD IS AT A PREDETERMINED SLOPE, AND INCREASED WHEN THE SLOPE OF SAID BOARD IS GREATER THAN SUCH PREDETERMINED SLOPE.
Claim 2
Dependent Claim
169 words
IN A COUNTER-BALANCED DRAWING BOARD CONSTRUCTION OF THE CHARACTER DESCRIBED, A FRAME, A DRAWING BOARD, AND A COUNTER-BALANCING UNIT COMPRISING A BRACKET EXTENDING DOWNWARDLY FROM SAID BOARD; SAID BRACKET, NEAR ITS BOTTOM END, BEING SWINGABLY MOUNTED ON THE FRAME FOR MOVEMENT ABOUT A HORIZONTAL AXIS WHICH IS NEARER TO THE FRONT EDGE OF SAID BOARD THAN TO THE REAR EDGE THEREOF, AN EXTENSIBLE AND CONTRACTABLE STRUCTURE INCLUDING A SPRING BIASING SAID STRUCTURE TO CONTRACT, A FIRST PIN CARRIED ON SAID FRAME, IN FRONT OF, RELATIVELY NEAR AND IN FIXED RELATION TO SAID AXIS, AND A SECOND PIN CARRIED BY SAID BRACKET ABOVE SAID AXIS; THE ENDS OF SAID EXTENSIBLE AND CONTRACTABLE STRUCTURE BEING PIVOTALLY LINKED TO SAID PINS RESPECTIVELY; THE RESPECTIVE LOCATIONS OF SAID PINS BEING SUCH THAT THE STRESS IN THE SPRING IS DECREASED AS THE BOARD IS SWUNG FROM A HORIZONTAL POSITION TO ONE WHERE THE SAID BOARD IS AT A PREDETERMINED SLOPE, AND INCREASED WHEN THE SLOPE OF SAID BOARD IS GREATER THAN SUCH PREDETERMINED SLOPE.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |