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 |
| 4242669 | Passive infrared intruder detection system Radiation detection apparatus is disclosed including a first detector (6) for detecting radiation at a wavelength which is preferably in the infra-red region, and a device for sensing the presence of an obturating element (11), which element acts to preve... | 12/30/1980 |
| 4233596 | Flare monitoring apparatus A flare monitoring apparatus for detecting the generation of black smoke in a flare, the excessiveness of a flare and extinguishment of a flare based on the ratio and/or difference between an emissive power of infrared radiation emitted from a flare at a ... | 11/11/1980 |
| 4229733 | Exposure detecting device An exposure detecting device comprising a radiation detector means providing an output signal responsive to the intensity of received ultraviolet radiation, a storage means receiving the output signal of said detector means and providing an output signal ... | 10/21/1980 |
| 4224608 | Single terminal detection system A single terminal detection system of the beam variety is provided with polarizing filters to sense "near-field" problems. One filter polarizes radiation reflected back to the transceiver component and a second filter, positioned within the transceiver, p... | 09/23/1980 |
| 4219804 | Sensor for electromagnetic waves caused by nuclear detonation An electronic sensor is disclosed, having circuits for identifying electromagnetic radiation signals caused by nuclear detonations. Circuits also are provided for discriminating against false indications due to electromagnetic radiation caused by lightnin... | 08/26/1980 |
| 4219777 | Detector for multiplicity of radio wave frequencies Apparatus for sensing the presence of one or more of a multiplicity of radio waves of distinct frequencies, using a single horn and one or more radiation-receiving apertures with associated circuitry.... | 08/26/1980 |
| 4207561 | Intruder alarm arrangement for an optical communication system An intelligence modulated optical beam is injected into an optical waveguide through a beam splitter. At the output end of the optical waveguide the optical beam has a portion thereof transmitter through a partial reflector to a detector or receiver with ... | 06/10/1980 |
| 4206454 | Two channel optical flame detector A flame detector which is capable of discriminating between hydrocarbon fires and background radiation produced by the sun, artificial light or black body radiation. Two radiation sensors are provided, each being responsive to separate known radiation pea... | 06/03/1980 |
| 4199716 | Microwave hazard alarm A microwave hazard alarm that indicates the presence of microwave radiation from microwave ovens or other transmitting sources by means of a light indicator. The alarm comprises a handheld microwave receiver including an antenna, a detector, a battery pow... | 04/22/1980 |
| 4198141 | Out-of-range indication device for automatic diaphragm control An indicating system for indicating a diaphragm aperture suitable for scene brightness and set exposure factors, includes a pair of out-of-range indicating means for making an indication when the suitable diaphragm aperture is outside an available diaphra... | 04/15/1980 |
| 4197461 | Miniaturized radiation chirper The disclosure relates to a miniaturized radiation chirper for use with a small battery supplying on the order of 5 volts. A poor quality CdTe crystal which is not necessarily suitable for high resolution gamma ray spectroscopy is incorporated with approp... | 04/08/1980 |
| 4196393 | Microwave signal detector Disclosed is a microwave detector for giving an indication of the presence of microwave energy at either X-band or K-band frequencies. It utilizes a common horn and waveguide resonator with four diodes. A divider separates the waveguides into two compartm... | 04/01/1980 |
| 4196425 | Patient activity monitoring system In order to monitor the movements of a patient who is confined to a bed and to alert supervisory personnel in the event that the patient attempts an unauthorized departure therefrom, an array of radiant energy emitters and a corresponding array of radiant... | 04/01/1980 |
| 4195291 | Digital controlled rotation sensor An electronic sensor for detecting motion and the rate of motion, particularly rotative movement, utilizes digital control apparatus wherein pulses are transmitted to a digital counter at a rate proportional to the rate of rotation of the member being sen... | 03/25/1980 |
| 4182990 | Radar receiver and method of indicating range to a radar source A radar receiver for indicating the presence of a source of microwave energy includes an antenna, a modulation oscillator and modulator diode, a detector diode connected to bandpass amplifier stages, a peak detector providing a signal proportional in leve... | 01/08/1980 |
| 4155077 | Apparatus for audible alerting of enclosure opening A portable, miniaturized, self-contained audible alerting device is disclosed. The device is housed in a small case adapted to be positioned in a darkened enclosure, such as a medicine cabinet, for receiving light when the enclosure is opened, producing a... | 05/15/1979 |
| 4119949 | Fire detector utilizing two bandwidths of radiation An optical fire detector has a radiation-emitting means which emits a beam of radiation which, after passing through an intermediate air-medium is received by a radiation detecting means for providing an alarm upon an obscuration of the beam or radiation.... | 10/10/1978 |
| 4119843 | Article detection system with synchronous demodulation An article detection system utilizing optical transducers in a transducer housing designed to minimize detection errors and including additional circuitry for minimizing errors in the processing of the signal. The system produces an output for each articl... | 10/10/1978 |
| 4065758 | Alarm detector responsive to rate of change of a monitored condition A physical quantity such as temperature, infrared radiation or smoke is detected by means of a conversion device for emitting an alarm signal whose amplitude is representative of the intensity of the physical quantity. The detector comprises a unit for me... | 12/27/1977 |
| 4039825 | Position indicating system The invention concerns apparatus for indicating the position of a light beam relative to a target, comprising an optical system, as many linear arrays of photoelectric elements as the number of coordinates in which the position indication is sought, and a... | 08/02/1977 |
| 4032910 | Microwave alarm A portable microwave power detector is provided which will generate an alarm signal when placed within a microwave field having a power density above a predetermined limit. The detector comprises a rigid body member, a microwave receiving antenna fixed to... | 06/28/1977 |
| 4025798 | Fail-safe circuit An electric system normally responsive to radiation over a path traversed by a body of material. An auxiliary radiation source generates a continuous signal through the portion of the circuit monitored for failure. The continuous signal opposes deenergiza... | 05/24/1977 |
| 4013886 | Light projector and detector unit The light beam projector and the directive light receiver of a light barr intrusion detector are mounted side by side on a common mounting body which is angularly adjustable in a fixed casing, so as to direct the projected light for maximum reflection to... | 03/22/1977 |
| 3995959 | Method and apparatus for determining the operational status of a photographic film processor A method and apparatus for determining the operational status of a photographic film processor, particularly an X-ray film processor. A photographic film is exposed to a test pattern including at least three areas to produce, upon development of said test... | 12/07/1976 |
| 3993929 | Automatic correct exposure indicator A correct exposure annunciator for electronic flash apparatus includes an indicator which is turned on when the voltage on a capacitor is less than a predetermined value. The capacitor is discharged in response to a control signal which indicates that pro... | 11/23/1976 |
| 3991302 | Method for detecting and isolating faults in digital and analog circuits with multiple infrared scanning under conditions of different stimuli A method for detecting faults in digital and analog circuits including the steps of thermally stabilizing the circuit, applying electrical stimulus to the circuit for a predetermined time period, scanning the circuit to determine the infrared response, ap... | 11/09/1976 |
| 3988725 | Detector system A detector system particularly adapted for use in installation where the supply voltage is subject to wide variations comprises a detector which produces a voltage in response to a condition to be detected, a supervisory circuit, and an alarm actuator, in... | 10/26/1976 |
| 3987319 | Radiation-activated sensor A sensing system for use in a remote location which detects electromagnetic adiation energy, the system being self-activating, turning itself automatically on and off, as a function of radiation intensity across the detector. In essence, when no radiation ... | 10/19/1976 |
| 3985318 | Helicopter blade crack indicator Method and apparatus for continuously detecting cracks in aircraft blades while in flight. A hollow blade is sealed with a pressure differential, either above or below atmospheric. A reduction in the pressure differential such as results from cracks, is d... | 10/12/1976 |
| 3959791 | Digital display systems In a digital display system of the type wherein a plurality of luminous display elements are selectively operated in accordance with the value of an analogue input signal, the driving circuit of the display elements is constructed such that one display el... | 05/25/1976 |
| 3955192 | Storm severity monitoring system An audible alarm storm severity monitor utilizes an electromagnet as a primary sensor in connection with an audio frequency amplifier to modify the conductivity of a silicon controlled rectifier, the conductivity modification effecting a corresponding cha... | 05/04/1976 |
| 3955183 | Alarm condition sensing and indicating circuit with test capability An alarm circuit includes an alarm condition indicating section having an alarm indicator, such as a lamp, and a power supply therefor, the lamp becoming illuminated in response to sensing of an alarm condition. Also included is an alarm condition sensing... | 05/04/1976 |
| 3953137 | Nuclear-burst strength detecting and measuring device A continuous-operation automatic device for detection and accurate measurement of the strength of a burst generating an emission from luminous or infrared sources. This device characterizes and analyzes the maxima and minima of a "thermal flux/time" curve... | 04/27/1976 |
| 3943499 | Portable fire detector A portable fire alarm device comprising fire detecting means and alarm means powered from a self-contained power supply. The power to the detector and alarm is through a normally closed switch of the type such as a mercury switch which may be opened by ti... | 03/09/1976 |
| 3940700 | Method and installation for the detection of a source generating electro-magnetic oscillations A method for the detection of a source generating electro-magnetic oscillations wherein for the purpose of eliminating disturbances caused by foreign transmitters there is measured the field intensity at at least two spatially separate locations, the dete... | 02/24/1976 |
| 3940699 | Radio frequency energy signalling apparatus Portable, plugable electrical test equipment signals the presence or absence of radio frequency energy within a predetermined frequency spectrum, as on a CATV or MATV video distribution system. The equipment comprises a cascaded bandpass filter, radio fre... | 02/24/1976 |
