| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Method of securely interrupting the electric power supply from a low-frequency or direct voltage source to a load, and appartus for carrying out the method | US540369 | 1983-09-30 | US4591964A | 1986-05-27 | Clas A. Kemstedt |
| The invention relates to a method and an apparatus for secure interruption of the supply of electric power from e.g. a low-frequency source (1) to a signal lamp (2) which when alight announces permission for a train to pass. The output voltage (a) of the source (1) is chopped by a chopper device (4) to a high-frequency alternating voltage (e,f) in response to a high-frequency input signal (b) to the chopper device (4) and is transferred from the primary to the secondary side of a transformer (5,6) as well as being rectified and filtered to form a voltage (k) applied to the signal lamp (2), said voltage (k) having a wave form corresponding to the wave form of the output voltage (a) of the source (1) and which is securely interrupted by interrupting the input signal (b) to the chopper device (4). | ||||||
| 102 | Device for detecting unwanted signal combinations of two signal lamps in traffic lights | US969524 | 1978-12-14 | US4255738A | 1981-03-10 | Nicolaas Van Tol |
| Apparatus for preventing the simultaneous energization of a pair of traffic lights includes a detection device for monitoring any leakage current in the cables between the traffic lights and a control box. A threshold voltage related to a predetermined level of leakage current to be monitored is coupled to the detection device which actuates an alarm if the leakage current across at least one traffic light exceeds said predetermined level of leakage current. | ||||||
| 103 | Sequence control system with timed operations | US604795 | 1975-08-14 | US4023109A | 1977-05-10 | Richmond B. Shreve |
| A system for checking and controlling a sequence of operations including a plurality of logic circuits corresponding to the number of operations. A bistable latch circuit has complementary outputs connected to inputs of two gates. A counter counts timing pulses and has its output connected to another input of each gate. If a signal is received by the latch indicating completion of an operation prior to the counter reaching a predetermined count, one gate provides a signal enabling the sequence of operations to continue. If the counter reaches the predetermined count prior to receipt of the signal by the latch, the other gate provides a signal to interrupt the sequence of operations. | ||||||
| 104 | Control system for ohmic loads, preferably signal lamps in a road traffic system | US381903 | 1973-07-23 | US3962676A | 1976-06-08 | Horst Maisel |
| A control system for ohmic loads, particularly signal lamps of a traffic regulating system in response to periodic test pulses supplied under normal operating conditions of the ohmic loads in which an evaluation relay having an inherent delay and including an actuating winding is adapted to be energized by the discharge of a capacitor, the actuating winding forming a part of a series circuit including such capacitor and a diode with said capacitor being adapted to be charged from a power supply which forms a part of a second series circuit which also includes such capacitor as well as a further diode, and transistors for controlling the respective series circuits in response to said periodic test pulses, with the duration of the charge period of such capacitor being less than the inherent delay of said relay. | ||||||
| 105 | Traffic signaling system | US50249274 | 1974-09-03 | US3916374A | 1975-10-28 | DREBINGER PETER; WENTER PETER |
| A traffic signaling system having a plurality of independent signal groups which can be actuated by means of control orders, in which incompatible signal groups are coupled with each other, taking into account desired protective periods, with the independent signal groups being responsive to control orders supplied thereto, each signal group being so coupled with incompatible signal groups that upon supplying an order signal to a signal group, actuation of such signal group will take place only when protective time periods have been completed at each incompatible signal group.
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| 106 | Fail safe control circuit for traffic lights | US3786414D | 1971-03-19 | US3786414A | 1974-01-15 | DRESSAYRE J |
| A circuit for preventing the simultaneous energization of first and second signal lamps includes first and second relay contacts connected in series with said first and second lamps, respectively, across a source of voltage. A pair of diodes are connected in series opposition between the common junction points of the lamps and contacts. A high-ohmic relay coil is connected between the junction of the diodes and one terminal of the voltage source.
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| 107 | Emergency traffic light control | US3629600D | 1969-01-22 | US3629600A | 1971-12-21 | STULER C ROBERT; SMITH THEODORE H |
| Automatic changeover apparatus for operating a traffic light under DC power through an inverter upon a failure of a primary power source. A battery charger is incorporated into the apparatus to maintain the battery providing the DC power at peak voltage.
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| 108 | Transistorized monitoring circuit | US3579223D | 1968-06-25 | US3579223A | 1971-05-18 | MCKAIG ARTHUR B |
| The invention consists of modifications and improvements to the monitoring circuit of U.S. Pat. No. 3,293,630. These changes increase the sensitivity and accuracy of the monitoring circuit by an improved interconnection with the monitored circuit, provide an adjustment to compensate for manufacturing tolerances in components, provide an adjustment for matching the monitoring circuit to the monitored circuit, eliminate problems with alternating current waveshape in the monitored circuit, eliminate false indications by effective use of time delay circuits and furnish more usable monitoring information by including a gating circuit.
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| 109 | Solid state auxiliary controllers | US50224865 | 1965-10-22 | US3384871A | 1968-05-21 | SELZER JOHN V; PHILIP CANE |
| 110 | Electrical monitoring system | US78525859 | 1959-01-06 | US3107338A | 1963-10-15 | BARKER JOHN L |
| 111 | Single pen, multichannel recording or indicating meter | US78677959 | 1959-01-14 | US3047837A | 1962-07-31 | FIESER GARLAND E |
| 112 | Circuit arrangement for the blocking of circuits in interlocking plants operating with electric lockings | US34904453 | 1953-04-15 | US2787740A | 1957-04-02 | ROBERT HELMERT |
| 113 | Electric circuit for controlling traffic signals | US78538047 | 1947-11-12 | US2590748A | 1952-03-25 | JOSEPH BLANCHET OVILA |
| 114 | Traffic signal apparatus | US70261446 | 1946-10-11 | US2557531A | 1951-06-19 | BLANCHET OVILA J |
| 115 | Device for controlling the illumination of lamps | US57218131 | 1931-10-30 | US1950312A | 1934-03-06 | LE GORRE JEAN L |
| 116 | Traffic signal | US44590330 | 1930-04-21 | US1900723A | 1933-03-07 | MILLER DALE O |
| 117 | Signaling system and apparatus | US55011231 | 1931-07-11 | US1869091A | 1932-07-26 | WILLIAM BRANDER |
| 118 | Street-lighting system | US72985024 | 1924-08-02 | US1716271A | 1929-06-04 | HOOD SAMUEL B |
| 119 | Headlight indicator | US847625 | 1925-02-11 | US1590947A | 1926-06-29 | KAMMRITZ ARTHUR E |
| 120 | Annunciator. | US1911666695 | 1911-12-19 | US1114275A | 1914-10-20 | LUNGEN ADAM |
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