Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 4949018 | High pressure sodium lamp starter controller A starter controller for a multiple parallel ballast for high pressure sodium lamps detects lamp "drop-out" or 'cycling" and enables restarting of the lamp if the drop-out was causded by line transients of a level sufficent to cause normally operating lam... | 08/14/1990 |
| 4873600 | Utility pedestal A utility station or pedestal for a boat dock is formed of an upper portion hinged to a lower portion. The interface between the portions extends across the housing at an angle with respect to horizontal so that when the upper portion is swung into an ope... | 10/10/1989 |
| 4441056 | High pressure sodium lamp ballast circuit A ballast circuit for limiting the kilovolt-ampere rating of a ballast required to operate a high pressure sodium lamp during starting, hot restart and lamp out conditions. The ballast circuit includes a voltage limiting or clamping circuit across the sec... | 04/03/1984 |
| 4339695 | High pressure sodium lamp ballast circuit A ballast circuit for limiting the kilovolt-ampere rating of a ballast required to operate a high pressure sodium lamp during starting, hot restart and lamp out conditions. The ballast circuit includes a voltage limiting or clamping circuit across the sec... | 07/13/1982 |
| 4258295 | Timed ballast circuit for sodium vapor lamp A ballast circuit for driving a sodium vapor lamp includes a ballast transformer having a primary winding connected to a constant current power source. A secondary winding of the transformer is connected across the lamp. A high voltage oscillator responsi... | 03/24/1981 |
