Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7300173 | Replacement illumination device for a miniature flashlight bulb Disclosed is a method and apparatus for providing a solid state light emitter and driving circuitry integrated into a component module that will retrofit common incandescent light bulb applications. The disclosed embodiment is directed to the retrofitting of small f... | 11/27/2007 |
| 7128437 | Temperature activated pressure relief mechanism for flashlights and batteries A temperature activated pressure relief mechanism for a flashlight or other battery containing device includes a watertight sealed flashlight housing which has an opening which extends from an outer surface to and inner surface of the housing. A metallic eyelet havi... | 10/31/2006 |
| 6975312 | Computer system having network connector and method of checking connection state of network cable therefor A computer system having a network connector to which a network cable is connected, including a displaying part displaying a connection state of the network cable; a signal processing part processing a signal inputted through the network connector; and a control par... | 12/13/2005 |
| 6433551 | Engine timing measurement device with RPM and advance displays and flashlight function A timing light for measuring timing of spark ignition has separate displays of engine RPM and timing advance. Another aspect of the invention provides a flashlight function which triggers the flash tube of the timing light to produce a constant bright lig... | 08/13/2002 |
| 6232784 | Circuit continuity tester and method A conventional flashlight is adapted for use as a circuit continuity tester. The flashlight has the usual hollow body containing the batteries, a bulb having one contact in communication with the positive battery terminal and the other contact connected, ... | 05/15/2001 |
| 5406207 | Electrical continuity tester combined with flashlight and/or lantern An improved testing structure is provided in a flashlight (or lantern) provided with an electrical continuity tester. The flashlight or lantern has an insulated body and a flashlight (or lantern) bulb and batteries in primary series circuit. The testing s... | 04/11/1995 |
| 5262728 | Combination flashlight/lantern electric continuity tester An improvement is provided in a combination flashlight (or lantern)/continuity tester having an insulated body and a (flashlight) bulb and batteries in series circuit. The improved tester, which is formed in the flashlight (or lantern) body, includes an e... | 11/16/1993 |
| 5051876 | Compound hand tool with a screwdriver A compound hand tool which can be attached to or include a flashlight in order to provide a single tool which performs the combined functions of a flashlight, an electrical continuity tester, a light to illuminate the work, and either a screwdriver, an aw... | 09/24/1991 |
| 4864225 | Coaxial cable tracer and tester A device for testing continuity of coaxial cables and tracing coaxial cables through junction boxes and the like includes a cylindrical housing formed in penlight fashion with an LED at the distal end and a battery disposed therein. The proximal end of th... | 09/05/1989 |
| 4839599 | Multipiece cable testing device which functions as flashlight, continuity checker, and cable identifier A coaxial cable testing device has a modular construction wherein the several pieces may be configured in different arrangements to fulfill the separate functions of a flashlight, a continuity checker, a cable identifier, and a bandit splitter detector. T... | 06/13/1989 |
| 4428033 | Flashlight having test leads and a second, remote, magnetically attachable rotatable lamp This invention provides a flashlight of conventional use that has a socket at its rear end. A plug and flexible conductor assembly is inserted into this socket and carries the battery power from the conventional flashlight to an auxiliary light. This auxi... | 01/24/1984 |
| 4322782 | Flashlight Flashlight with means permitting operation in a voltage mode with memory, in a conductivity mode, and in a lighting mode.... | 03/30/1982 |
| 4250446 | Combination flashlight and circuit tester A combination flashlight and circuit tester is disclosed which functions as both a conventional source of portable illumination and a circuit continuity tester employing either internal or external sources of electrical energy. An improved multidirectiona... | 02/10/1981 |
| 4045726 | Tool for manually tripping a fault indicator for high voltage electric power circuits and resetting same This invention relates, generally, to fault indicators and it has particular relation to tools for testing fault indicators of the kind and character disclosed in my U.S. Pat. No. 3,906,477, issued Sept. 16, 1975.... | 08/30/1977 |
| 4021732 | Convertible electric tester for use with a flashlight and including a jack plug with tubular shunt An electric tester usable for one type of test by tapping into the battery current of a flashlight, or for an alternate type of test as a shunt across the terminals of units in a power line to determine their conductivity. The tester is a jack with a plug... | 05/03/1977 |
| 4001803 | Lighting devices An emergency power failure indicator circuit and night light adapted for use as a portable flashlight having wall outlet insertion prongs which are extendable from the body of the unit with concurrent actuation of a brush-type switch paralleling an on-off... | 01/04/1977 |
| 3944806 | Portable high intensity lamp A portable high intensity lamp comprising of a housing having a lamp supported in it and also carrying a battery and a switch relay and circuitry to energize and de-energize the light source from the battery, and a remote control trigger device and connec... | 03/16/1976 |
