Patent US3587012A successfully refreshed from Google Patents.
US3587012A
Expired / Lapsed
US
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Magnetically actuated detecting and switching device
Assignee: Smyth Roston and Pavit
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Filing: 1970-01-26
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Granted: 1971-06-22
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Expires: 1990-01-26
Abstract
Abstract A car-detecting device is suggested in which a plurality of permanent magnets are symmetrically mounted on a support member to define a common magnetic axis. A shaft on the support member has a vertical axis intersecting transversely the magnetic axis. The lower end of the axis of the shaft is journaled in a needle bearing. The upper end of the shaft traverses a feedthrough bearing inhibiting pivoting of the support member around a horizontal axis. Electric current is fed to the support member through a contact engaging the upper end of the shaft. The support member is provided with a contact cooperating with a stationary contact or a pair of stationary contacts positioned in the angular deflection path of the contact on the support member to serve also as stop for limiting rotation and angle of deflection of the support member with the permanent magnets. This system is preferably used in that normally the magnets align themselves with earth''s magnetic field without contact making as between the two contacts. The contacts operate on circuit means responding when a car deflects the permanent magnets from their alignment with the earth magnetic field.
Inventors
- 👤 Leonard Piekarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
H; H01; H01H; H01H36/00; E; E01; E01F; E01F13/00; E01F13/10; G; G08; G08G; G08G1/00; G08G1/01; G08G1/042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
283 words
A car-detecting device, comprising: a frame for positioning adjacent an area into which a car may enter, without physically contacting said frame, the frame having an upper and a lower member; a supporting member including a shaft; means on the frame journaling the shaft for rotation about a vertical axis, including a neEdle bearing on the lower member of the frame on which one end of the shaft rests, the upper member being provided with a through bearing traversed by the shaft and serving as means for inhibiting rotation of the shaft about a horizontal axis; a spring-type element on the upper member resiliently engaging the other end of the shaft for making electrical contact with the other end of said shaft at a region thereof closely limited to the point where the axis of said shaft traverses said one end of said shaft; permanent magnet means supported by said member and symmetrically disposed relative to said shaft; and means on the frame and on the support member for limiting the angular deflection of the supporting member relative to the frame about the axis of the shaft and including first and second contact means respectively mounted on said frame and on said supporting member and in such a relation to each other that engagement of the first and second contact means limits the angular deflection of the support member, disengagement of the first and second contact means permits rotation of the support member moving the first and second contact means in relation to each other, said first contact means being insulated from said connection means, said second contact means being in electric connection with the support member and displaced from the magnet means.
Claim 2
Dependent Claim
283 words
A car-detecting device, comprising: a frame for positioning adjacent an area into which a car may enter, without physically contacting said frame, the frame having an upper and a lower member; a supporting member including a shaft; means on the frame journaling the shaft for rotation about a vertical axis, including a neEdle bearing on the lower member of the frame on which one end of the shaft rests, the upper member being provided with a through bearing traversed by the shaft and serving as means for inhibiting rotation of the shaft about a horizontal axis; a spring-type element on the upper member resiliently engaging the other end of the shaft for making electrical contact with the other end of said shaft at a region thereof closely limited to the point where the axis of said shaft traverses said one end of said shaft; permanent magnet means supported by said member and symmetrically disposed relative to said shaft; and means on the frame and on the support member for limiting the angular deflection of the supporting member relative to the frame about the axis of the shaft and including first and second contact means respectively mounted on said frame and on said supporting member and in such a relation to each other that engagement of the first and second contact means limits the angular deflection of the support member, disengagement of the first and second contact means permits rotation of the support member moving the first and second contact means in relation to each other, said first contact means being insulated from said connection means, said second contact means being in electric connection with the support member and displaced from the magnet means.
Claim 3
Dependent Claim
75 words
A control system as set forth in claim 1, said frame being positioned in a driveway in front of a garage, and including circuit means connected to said first and second contact means and being energized when the position relation between the first and second contact means changes due to deflection of the permanent magnet by a car in the driveway, said electric circuit means including an electrical control means for operating a garage door.
Claim 4
Dependent Claim
74 words
In a device as set forth in claim 2, the magnet means comprising: a plurality of substantially similar-shaped permanent magnets mounted on said supporting member and defining common magnetic north pole and south pole regions, there being a resulting magnetic axis; the means journaling said supporting member with said magnets about an axis extending transversely to said magnetic axis; electric circuit means; and means on said supporting member for governing said electric circuit means.
Claim 5
Dependent Claim
52 words
In a device as set forth in claim 2, the magnet means comprising: an even plurality of cylindrically shaped permanent magnets disposed on said supporting member at such magnetic orientation that the magnetical axis extend in parallel and substantially defining a common plane, the poles of said magnets are being similarly oriented.
Claim 6
Dependent Claim
100 words
A device as set forth in claim 1, the means including the first and second contact means comprising: a pin on the supporting member serving as the second contact means, and a contact piece having two extensions mounted to the frame as the first contact means, the two extensions extending in the path of the pin upon rotation of the supporting member about said axis of the shaft for limiting the range of angular positions of the supporting member; at least one of the extensions when engaging the pin providing closed contact relation of the first and second contact means.
Claim 7
Dependent Claim
37 words
A device as set forth in claim 5, the frame with the two extensions being positioned so that the pin is disengaged from both extensions when the permanent magnet means is aligned with the car''s magnetic field.
Claim 8
Dependent Claim
37 words
A device as set forth in claim 6, the frame with the pin being positioned so that the two extensions are disengaged from the pin when the permanent magnet means is aligned with the earth''s magnetic field.
Claim 9
Dependent Claim
100 words
A device as set forth in claim 1, the means including the first and second contact means comprising a pin on the frame as the first contact means, further comprising a contact piece having two extensions mounted to the supporting member as the second contact means, the two extensions extending in the path of the pin upon rOtation of the supporting member about said axis of the shaft for limiting the range of angular positions of the supporting member; at least one of the extensions when engaging the pin providing closed contact relation of the first and second contact means.
Claim 10
Dependent Claim
232 words
A magnetic switching device, comprising: a frame including electrically conductive first and second frame bars, and further including insulating spacing members assembled with said frame bars to complete the frame, said second frame bar having an aperture, there being a feedthrough bearing in said aperture aligned with said needle bearing; an electrical contact pin on said first frame bar; a hard needle bearing on said first frame bar; a shaft having upper and lower needle points and being received in said feedthrough bearing while one of said needle points rest on said needle bearing of said first frame bar; a contact spring mounted on top of said second frame bar and engaging the other needle point of said shaft when projecting through said feed through bearing, and making contact with said other needle point; a supporting member mounted on said shaft for rotation therewith; a plurality of similarly shaped permanent magnets symmetrically supported by said support member to permit free rotary motion in a plane extending transversely to the axis of said shaft; and a contact on said supporting member capable of engaging said contact pin for contact making thereby impeding further rotation of said supporting member and permitting disengagement from said pin, said pin and contact governing the flow of electric current from said first member through said supporting member and said shaft, said contact spring and said second frame bar.
Claim 11
Dependent Claim
232 words
A magnetic switching device, comprising: a frame including electrically conductive first and second frame bars, and further including insulating spacing members assembled with said frame bars to complete the frame, said second frame bar having an aperture, there being a feedthrough bearing in said aperture aligned with said needle bearing; an electrical contact pin on said first frame bar; a hard needle bearing on said first frame bar; a shaft having upper and lower needle points and being received in said feedthrough bearing while one of said needle points rest on said needle bearing of said first frame bar; a contact spring mounted on top of said second frame bar and engaging the other needle point of said shaft when projecting through said feed through bearing, and making contact with said other needle point; a supporting member mounted on said shaft for rotation therewith; a plurality of similarly shaped permanent magnets symmetrically supported by said support member to permit free rotary motion in a plane extending transversely to the axis of said shaft; and a contact on said supporting member capable of engaging said contact pin for contact making thereby impeding further rotation of said supporting member and permitting disengagement from said pin, said pin and contact governing the flow of electric current from said first member through said supporting member and said shaft, said contact spring and said second frame bar.
Claim 12
Dependent Claim
124 words
A magnetic switching device comprising: a supporting member having a shaft rotatably supporting said supporting member, said shaft having upper and lower needle points; a first means providing a needle bearing to receive said lower needle pin permitting rotary movement of said member with said shaft; second means providing a feedthrough bearing for said shaft; means making electrical contact with said upper needle point; permanent magnet means substantially symmetrically disposed in said supporting member relative to said shaft and having at least one magnetic axis extending transversely to the axis of said shaft; first, stationary contact means positioned relative to said supporting member; and second contact means on said supporting member moving therewith for relative contact making and breaking with said first contact means.
Claim 13
Dependent Claim
124 words
A magnetic switching device comprising: a supporting member having a shaft rotatably supporting said supporting member, said shaft having upper and lower needle points; a first means providing a needle bearing to receive said lower needle pin permitting rotary movement of said member with said shaft; second means providing a feedthrough bearing for said shaft; means making electrical contact with said upper needle point; permanent magnet means substantially symmetrically disposed in said supporting member relative to said shaft and having at least one magnetic axis extending transversely to the axis of said shaft; first, stationary contact means positioned relative to said supporting member; and second contact means on said supporting member moving therewith for relative contact making and breaking with said first contact means.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |