US3359417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional relay
Assignee: Servo Corp of America
•
Filing: 1966-11-18
•
Granted: 1967-12-19
•
Expires: 1986-11-18
Abstract
No abstract record available.
Inventors
- 👤 Cornelius A Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/021; B61L1/00; B61L1/02; B61L1/10; B61L1/16; B61L1/163; B61L1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
RELAY MEANS RESPONSIVE TO A PARTICULAR ONE DIRECTION OF TRAFFIC MOVEMENT ALONG A RAILROAD TRACK, COMPRISING TWO RAIL-MOUNTED MAGNETIC WHEEL-TRIP DEVICES SECURED IN SPACED RELATION ALONG THE SAME TRACK, EACH OF SAID DEVICES PRESENTING A MAGNETIZED AIR GAP FOR INTERCEPTION OF A WHEEL FLANGE AND DEVELOPING AN ELECTRICAL OUTPUT SIGNAL CHARACTERIZED BY A PULSE OF ONE POLARITY FOLLOWED BY A PULSE OF OPPOSITE POLARITY FOR EACH PASSING WHEEL, THE SPACING BETWEEN SAID TRIPS BEING SUCH THAT A WHEEL FLANGE ON A GIVEN AXLE IS LEAVING THE GAP FOR ONE WHEEL TRIP AS A WHEEL FLANGE ON THE SAME AXLE IS ENTERING THE GAP FOR THE OTHER WHEEL TRIP, WHEREBY FOR EACH PASSING AXLE PROCEEDING IN A FIRST DIRECTION THERE WILL BE A COINCIDENCE OF PULSE OUTPUTS OF SAID TRIPS IN A FIRST UNIQUE POLARIZED RELATIONSHIP, AND FURTHER WHEREBY FOR EACH PASSING AXLE PROCEEDING IN THE OPPOSITE DIRECTION THERE WILL BE A COINCIDENCE OF PULSE OUTPUTS OF SAID TRIPS IN A SECOND UNIQUE POLARIZED RELATIONSHIP, AND COINCIDENCE-DETECTION MEANS INCLUDING A CONTROL RELAY RESPONSIVE TO DETECTION OF THE COINCIDENCE IN SAID FIRST UNIQUE POLARIZED RELATIONSHIP FOR PRODUCING A SIGNAL FOR REMOTELY INDICATING THAT THE PASSING TRAFFIC IS IN SAID FIRST DIRECTION.
Claim 2
Dependent Claim
199 words
RELAY MEANS RESPONSIVE TO A PARTICULAR ONE DIRECTION OF TRAFFIC MOVEMENT ALONG A RAILROAD TRACK, COMPRISING TWO RAIL-MOUNTED MAGNETIC WHEEL-TRIP DEVICES SECURED IN SPACED RELATION ALONG THE SAME TRACK, EACH OF SAID DEVICES PRESENTING A MAGNETIZED AIR GAP FOR INTERCEPTION OF A WHEEL FLANGE AND DEVELOPING AN ELECTRICAL OUTPUT SIGNAL CHARACTERIZED BY A PULSE OF ONE POLARITY FOLLOWED BY A PULSE OF OPPOSITE POLARITY FOR EACH PASSING WHEEL, THE SPACING BETWEEN SAID TRIPS BEING SUCH THAT A WHEEL FLANGE ON A GIVEN AXLE IS LEAVING THE GAP FOR ONE WHEEL TRIP AS A WHEEL FLANGE ON THE SAME AXLE IS ENTERING THE GAP FOR THE OTHER WHEEL TRIP, WHEREBY FOR EACH PASSING AXLE PROCEEDING IN A FIRST DIRECTION THERE WILL BE A COINCIDENCE OF PULSE OUTPUTS OF SAID TRIPS IN A FIRST UNIQUE POLARIZED RELATIONSHIP, AND FURTHER WHEREBY FOR EACH PASSING AXLE PROCEEDING IN THE OPPOSITE DIRECTION THERE WILL BE A COINCIDENCE OF PULSE OUTPUTS OF SAID TRIPS IN A SECOND UNIQUE POLARIZED RELATIONSHIP, AND COINCIDENCE-DETECTION MEANS INCLUDING A CONTROL RELAY RESPONSIVE TO DETECTION OF THE COINCIDENCE IN SAID FIRST UNIQUE POLARIZED RELATIONSHIP FOR PRODUCING A SIGNAL FOR REMOTELY INDICATING THAT THE PASSING TRAFFIC IS IN SAID FIRST DIRECTION.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |