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A small umbrella which may be removably attached to a beverage container in order to shade the beverage container from the direct rays of the sun.
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| Number | Title | Issue Date |
| 7193833 | Electric switch An electric switch (1) comprising a capacity sensor circuit (2) provided with a signal input (3) arranged to be connected to an actuating line, and which is provided with a relay device (4) arranged to feed a current to a load line (7 | 03/20/2007 |
| 6075356 | Power supply control unit for a lamp A power supply control unit for a lamp having a luminous means and an at least partly electrically conductive lamp housing comprises a first and a second line via which a power supply signal can be applied to the luminous means and which are insulated fro... | 06/13/2000 |
| 5327047 | Electrical dimmer system employing alternately applied silicon controlled rectifiers A dimmer control system includes two discrete silicon controlled rectifiers which respectively energize a lamp load during alternate half cycles of the input AC voltage. The separate placement of the SCRs ensures that much lower temperatures are reached t... | 07/05/1994 |
| 4713721 | Lighting fixture overload protector A two-terminal A.C. device is described which can be series connected with a lighting fixture to prevent overheating of the fixture in an overload condition, namely, when a lighting element exceeding the power rating of the fixture is installed. In broad ... | 12/15/1987 |
| 4703248 | Switching arrangement for full-wave power control which is insensitive to mains voltage fluctuations A switching arrangement for full-wave power control comprising a triac (2), the control electrode of which is preceded by a trigger diode, the control voltage being taken from an RC section having at least one potentiometer (9), which effects a phase shif... | 10/27/1987 |
| 4517620 | Electrical feed and control circuit for the pump piston of a spray gun An electrical feed and control circuit for a drive arrangement of the pump piston of a spray gun which comprises a coil and an oscillating armature, employs an input for connection to an alternating current network, an output leading to the oscillating ar... | 05/14/1985 |
| 4449054 | Electronic circuit for controlling the supply voltage of electromagnets, electric motors, resistors, in single- and three-phase systems The control circuit comprises a solid state controlled switch coupled to a terminal of the mains and a terminal of the load the supply voltage whereof has to be controlled, and a non controlled solid state switch operatively coupled to the solid state con... | 05/15/1984 |
| 4207501 | Lamp control circuit using heater/thermistor time delay A lamp control circuit having a heater and thermistor coupled between the illumination sensitive device and the control electrode of an SCR or triac for providing a time delay between the detection of a change in illumination and the switching of the SCR ... | 06/10/1980 |
| 4198562 | Electrically heated bedcover with overheat protective circuit An electrical heating apparatus such as an electrically heated bedcover protected against an overheating condition by an overheat protective circuit which utilizes a pair of solid state switching devices in the heating element circuit. The solid state swi... | 04/15/1980 |
| 4049976 | Solid-state voltage switching circuit A circuit for switching a voltage between a pair of terminals by means of a thyristor, preferably a silicon controlled rectifier (SCR), connected at its anode to one of the terminals and at its cathode to the other terminal, is characterized by a control ... | 09/20/1977 |
| 4031458 | A.C. voltage regulator employing thyristor An a.c. voltage regulator includes a three terminal thyristor connected across an a.c. power source in series with a load. The thyristor is associated with a time constant circuit comprising a variable resistor and a capacitor and which is connected there... | 06/21/1977 |
| 4008416 | Circuit for producing a gradual change in conduction angle The specification discloses a circuit which produces a gradual increase or decrease in the alternating current power applied to a series connected load. Double time constant gating circuitry and capacitor integration may be utilized in combination with se... | 02/15/1977 |
| 4006368 | A.C. voltage regulator including bilateral thyristor An a.c. voltage regulator comprises a three terminal, bilateral thyristor connected across an a.c. power source in series with a load. According to the invention, the bilateral thyristor is associated with a time constant circuit including a variable resi... | 02/01/1977 |
| 3980921 | Illuminating device for a microscope An illuminating device for a microscope provided with a lighting control circuit controlled by changing the firing angle for which an impedance means is inserted between the output side of said lighting control circuit and primary side of the transformer ... | 09/14/1976 |
| 3938032 | Gate pulse power supply for static alternating current switch An alternating current static switch comprising two branch circuits connected in inverse parallel circuit relation and having at least three semiconductor devices in series in each branch circuit has anode-to-cathode cross connections between oppositely p... | 02/10/1976 |
