Abstract: The method and apparatus of the present invention are useful for the monitoring of the electrical signals within an internal combustion spark plug circuit and the killing of a spark plug within that circuit. The invention essentially consists of connecting a transformer to the high voltage side of the spark plug circuit. Through the use of impedance and inductance, the present invention can either produce a low voltage replica of the waveform of the high voltage electrical signal which is directed to a spark plug or can effectively prohibit that spark plug from firing by short circuiting the low voltage side of the transformer of the device.

Abstract: The Signal Device for Positioning a Vehicle, according to the present invention relates to utilizing the peripheral vision of a driver of a vehicle in assessing the proper position of a vehicle relative to a confined parking space. The device is comprised of at least two surfaces, the first obscuring the second until the vehicle has attained the desired position within the parking space. Upon attaining this position, the second surface will come within the operator's field of vision thus notifying the operator to stop the vehicle. Alternately, the operator will stop the vehicle when the second surface obscures the first surface. Additionally, this invention includes a method for parking a vehicle in a confined parking space. Finally, this invention describes a method of distributing advertising and/or solicitation through mass mailing techniques, such advertising accompanying the signal device.

Abstract: Optical instruments having, inter alia, optics to process wavelengths of electromagnetic radiation to produce an interferogram. The instruments include at least one optical path and optical elements positioned along this path for splitting the electromagnetic radiation and spectrally dispersing the wavelengths to produce first and second sets of spectrally dispersed beams which interfere with each other to produce a plurality of different fringes of different wavelengths. The optics for dispersing the wavelengths includes a matched pair of gratings. The gratings may be reflective or they may be transmissive. The optics also includes a beam splitter and first and second mirrors. The gratings may be positioned in a variety of locations along the optical path. The instruments can also include a detector for detecting the interferogram and means for processing the detected interferogram to produce spectral information.