US3204154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic door holder and stop
Assignee: Yale and Towne Inc
•
Filing: 1962-12-10
•
Granted: 1965-08-31
•
Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Roy L Crandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:01
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/56; Y; Y10; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A MAGNETIC HOLDER, A FIRST CASING ADAPTED TO BE SECURED TO A WALL AND HAVING AN ELECTROMAGNETIC CORE, A SECOND CASING ADAPTED TO BE SECURED IN POSITION ON A DOOR TO MOVE INTO JUXTAPOSED RELATION TO THE FIRST CASING WHEN THE DOOR OPENS, AN ARMATURE MOVABLY MOUNTED ON THE SECOND CASING, YIELDING MEANS NORMALLY PRESSING SAID ARMATURE TO A PREDETERMINED INWARD POSITION ON ITS MOUNTING RELATIVELY TO SAID SECOND CASING, SAID ARMATURE BEING MOVABLY OUTWARDLY FROM SAID PREDETERMINED POSITION, SAID ELECTROMAGNETIC CORE BEING EFFECTIVE WHEN ENERGIZED TO PULL SAID ARMATURE OUTWARDLY AND AGAINST SAID CORE AS THE CASINGS BECOME JUXTAPOSED, SO AS TO HOLD THE DOOR OPEN WHILE A CLOSING PRESSURE APPLIED TO THE DOOR, AS BY A DOOR CLOSER, WILL STRESS SAID YIELDING MEANS TO HOLD THE ARMATURE PROJECTED OUTWARDLY OF THE SECOND CASING.
Claim 2
Dependent Claim
136 words
IN A MAGNETIC HOLDER, A FIRST CASING ADAPTED TO BE SECURED TO A WALL AND HAVING AN ELECTROMAGNETIC CORE, A SECOND CASING ADAPTED TO BE SECURED IN POSITION ON A DOOR TO MOVE INTO JUXTAPOSED RELATION TO THE FIRST CASING WHEN THE DOOR OPENS, AN ARMATURE MOVABLY MOUNTED ON THE SECOND CASING, YIELDING MEANS NORMALLY PRESSING SAID ARMATURE TO A PREDETERMINED INWARD POSITION ON ITS MOUNTING RELATIVELY TO SAID SECOND CASING, SAID ARMATURE BEING MOVABLY OUTWARDLY FROM SAID PREDETERMINED POSITION, SAID ELECTROMAGNETIC CORE BEING EFFECTIVE WHEN ENERGIZED TO PULL SAID ARMATURE OUTWARDLY AND AGAINST SAID CORE AS THE CASINGS BECOME JUXTAPOSED, SO AS TO HOLD THE DOOR OPEN WHILE A CLOSING PRESSURE APPLIED TO THE DOOR, AS BY A DOOR CLOSER, WILL STRESS SAID YIELDING MEANS TO HOLD THE ARMATURE PROJECTED OUTWARDLY OF THE SECOND CASING.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |