Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4855718 | Fire detection system employing at least one optical waveguide A fire detection system has a detector for sensing optical radiation from a spark or flame or hot spot and an optical waveguide comprising an elongate hollow tube, having an inlet end portion for placement in a hostile, hazardous environment, and having a... | 08/08/1989 |
| 4712096 | Condition responsive detection system and method There is disclosed a condition responsive detection system and method comprising a length of optical fiber including a core-cladding material which has a modal dispersion ratio less than a predetermined number. The fiber is placed in the area to be monito... | 12/08/1987 |
| 4553031 | Optical fire or explosion detection system and method There is disclosed a fire and explosion detection system and method comprising at least one first channel including a photocell and accompanying electronics for converting incident radiant energy of a first narrow band of wavelengths into a first electric... | 11/12/1985 |
| 4513202 | Self compensating fire detection device A device employing ionization principles for fire detection disclosing a configuration which allows compensation for adverse effects due to the flow of the gas through the device or due to the accumulation of dust and dirt therein. The detecting device in... | 04/23/1985 |
| 4464575 | Test device for an optical infra red detector A test device for a multiple channel infra red detector utilizing photocells comprising an aperture plate mounted on the housing member of the detector. In the embodiment described a test lamp is mounted on a surface portion of the aperture plate in fixed... | 08/07/1984 |
| 4241258 | Ultraviolet fire detector An ultraviolet fire detection device using a phosphor to translate energy from ultraviolet wavelengths down into visible and near infrared wavelengths for detection by a photosensitive solid state device, sounding an alarm upon detection of ultraviolet wa... | 12/23/1980 |
| 4224538 | Series supervision/parallel actuation device An electronic switch for use in alarm circuits in which line polarity is reversed in the actuation mode such that the electrical continuity of the circuit and the loads in the circuit may be supervised in series and upon polarity reversal the loads may be... | 09/23/1980 |
| 4222045 | Capacitive shift fire detection device A capacitive shift fire detection device having a sample circuit and a reference circuit, each circuit having an air capacitor connected to an oscillator and a counter. The presence of particles of combustion in the ambient environment results in a change... | 09/09/1980 |
