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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4734638 | Electric outlet and cable tracing method and apparatus A tradesman may identify which circuit is connected with any number of outlets or other terminations in an electrical wiring system, such as commonly found in buildings, through the use of a handheld, carry-about detector-indicator device. Operation relie... | 03/29/1988 |
| 4559637 | Tamper proof digital value accumulator and display method and apparatus The totalized count obtained from a seriate train of signal pulses is stored in a programmable memory means as a permanent state change in a separate memory cell for each count increment. Memory economy is had since each count increment preferably is stor... | 12/17/1985 |
| 4556309 | Electrophotographic imaging apparatus, particularly for color proofing and method Apparatus and method for producing color proofs electrophotographically. A platen carrying an electrophotographic member is translated sequentially past functional stations including a charging station, an exposure station, a toning station, a transfer st... | 12/03/1985 |
| 4542460 | Driving aid indicator for economical operation of automatic transmission equipped motor vehicle Driving aid apparatus for determining the best, most economical operating conditions for a motor vehicle equipped with an automatic transmission. The input member rotational rate of a torque converter coupled with the automatic transmission is measured. T... | 09/17/1985 |
| 4538204 | Corona producing method and apparatus A method and apparatus for producing a uniform elongate corona is provided. The apparatus includes at least one stationary corona electrode coupled to a supply of corona voltage. A moving ground electrode having a series of equally-spaced grounding points... | 08/27/1985 |
| 4486712 | Frequency dependent pulsed gain modulated metallic object detector A metal detector apparatus particularly adapted as a locator of small, usually obscure, isolated objects such as treasure items, antipersonnel mines, weapons, shrapnel, and other such items. The detector is of the portable transmitter-receiver type having... | 12/04/1984 |
| 4458204 | Frequency dependent pulsed gain modulated concealed structure locator Portable concealed structure locating and surveying translator apparatus, useful for tracing the bearing and lay of cables, pipes, and other expansive structures. The translator responds to the electromagnetic field radiating from a buried structure which... | 07/03/1984 |
| 4456367 | Toning system for electrostatic imaging apparatus A method and apparatus is provided for toning a latent electrostatic image on an exposed photoconductive surface of an electrophotographic member, using liquid toner comprising toner particles suspended in an electrically insulating liquid dispersant. Plu... | 06/26/1984 |
| 4455039 | Encoded security document Documents are encoded with at least one thin, transparent coating, normally invisible, but having a readily detectable physical characteristic such as, electrical conductivity, electrical impedance, electrical capacitance, electroluminescence. Each docume... | 06/19/1984 |
| 4452197 | Vehicle anti-theft ignition foiling device Ignition foiling device which serves to interfere with the efficient operation of a vehicle ignition system after a brief, predetermined period of time has elapsed subsequent to the unauthorized start-up of the vehicle engine. The foiling device thereby s... | 06/05/1984 |
| 4439734 | Metal object locator including frequency shift detector A frequency shift responsive metal detector having a sense oscillator coupled with an inducer loop. When the inducer nears a metal object, the effective inductance is changed which correspondingly shifts the natural frequency of the sense oscillator. The ... | 03/27/1984 |
| 4439158 | Teaching indicator for efficient vehicle gearshift operation Driving aid apparatus for use with a motor vehicle having a manual gearshift transmission and clutch, and providing the driver with guidance for the correct upshift or downshift timing which can contribute to fuel savings and less mechanical abuse of the ... | 03/27/1984 |
| 4438501 | Antilatchup pseudorandom binary sequence generator An antilatchup pseudorandom binary sequence generator which is interruptable without loss of sequence integrity. Provides sequence detector responsive to correct any undesirable sequence of substantially constant disallowed binary states. Properly irregul... | 03/20/1984 |
| 4435164 | Didactic apparatus providing for tutelage of responses through inculcation My present invention relates to didactic apparatus as particularly adapted to the tutelage of mathematical fundamentals, multiple choice statements, and the like. A set of inexpensive instructional problem or "flash" cards is prepared for the student for ... | 03/06/1984 |
| 4431302 | Charge level control for an electrochargeable medium Apparatus is described for providing controlled corona charging of an electrophotographic member that moves past a corona charging electrode. A corona sensor probe near the charging electrode receives a sample of the corona current flow from the electrode... | 02/14/1984 |
| 4417182 | Moving flutter illusion electric light controller An electric light controller means particularly adapted for use with an array of lamps to produce a distinctive "fluttering" effect, which is the combined visual sense of movement wrought by a sequential chaser together with the substantially random flick... | 11/22/1983 |
| 4405884 | Shaft position synchronization means for multiple synchronous induction motors The exact shaft angle position synchronization of two or more ordinary synchronous induction motors is provided. One motor, serving as the master, is powered directly from a source of alternating current. Each additional motor, which may be of a different... | 09/20/1983 |
| 4403332 | Signal level to pulse rate conversion method and apparatus A continuous, momently constant amplitude signal is received through a lossy transmission medium and adapted to produce a distinct step-like series of pulse repetition rates therefrom which are proportional to the received signal amplitude. The relatively... | 09/06/1983 |
| 4372679 | Image illumination compensation method and apparatus Compensation is provided in the illumination of a mechanically line scanned object plane scene, where the light source is moved across the object plane to provide the light necessary for optical projection of the scene onto an image plane. This compensati... | 02/08/1983 |
| 4355300 | Indicia recognition apparatus Method and device for detecting the presence or the absence of conductive indicia carried by a supporting substrate which together comprise a security document, for the purpose of ascertaining the genuineness, value or other selected characteristic repres... | 10/19/1982 |
| 4348597 | Latchup resistant pseudorandom binary sequence generator A pseudorandom binary sequence generator employing a conditional feedback path between several individual outputs and the input of a clocked shift register. Enhanced reistance to a latchup condition is brought about by way of a delay of one of the outputs... | 09/07/1982 |
| 4344121 | Clocked logic power supply Logic controlled regulated power supply which produces a d.c. output potential which is stabilized at a predetermined value through the variation of the average efficaciousness of a train of rectified clock pulses. The level where the predetermined value ... | 08/10/1982 |
| 4336464 | Two terminal timed electric switch providing zero off-state current flow therethrough A two terminal timed electric switch which connects in series with but one side of a power carrying a.c. circuit. In particular the timer serves as an effective replacement for the ubiquitous wall-switch type of on and off device used in the construction ... | 06/22/1982 |
| 4322786 | Pulse burst regulated d.c. power supply apparatus and method A power supply which serves as a power converter from a relatively low primary direct current energy source, to a generally higher value of secondary direct current power for application to an electric load element. The secondary power is voltage regulate... | 03/30/1982 |
| 4319544 | Digitally synthesized dynamic bias method and apparatus for toning control in developing latent electrophotographic images In an electrophotographic image forming process, a method and apparatus for providing an electric toning bias wherein the instantaneous electric potential value of the bias is changed with time in proportion to the natural decay of the resident electric c... | 03/16/1982 |
| 4306271 | Sequentially pulsed overlapping field multielectrode corona charging method and apparatus A sequential corona charging method including apparatus therefor which acts to provide several corona fields, each of its own distinct origin, which are brought together with some spatial overlap to act collectively to provide uniform charge current distr... | 12/15/1981 |
| 4304991 | Indicia sensor apparatus Indicia sensor apparatus which provides for a ready, low cost, electrical sensing of an indicia, supported on a readily interchangeable membrane, and provided as a coded pattern of aperture through the membrane. An elastomer electrode element, such as a c... | 12/08/1981 |
| 4300650 | Multilevel power assisted steering A multilevel power assisted steering system for vehicular application providing more than one value of steering assist to the operator thereof, the purpose fow which is intended to provide better operating safety and economy. A first, or greater, value of... | 11/17/1981 |
| 4300090 | Direct current power supply Direct Current power supply for providing a relatively low stabilized d.c. voltage from a relatively high a.c. voltage primary power source without the use of a transformer. The d.c. value is developed across a variable impedance device coupled substantia... | 11/10/1981 |
| 4284490 | R.F. Sputtering apparatus including multi-network power supply Apparatus for radio frequency sputtering in the megahertz range, primarily higher than about six megahertz, in which the target and anode electrodes are at a low input impedance reactively such that the transfer of power to the target for practical sputte... | 08/18/1981 |
| 4284489 | Power transfer network A power transfer network for efficiently coupling a source of high frequency energy to a physically large dimensioned electrode system in a sputtering machine which exhibits high spray capacitance to ground. The network includes an inductive element capab... | 08/18/1981 |
| 4263552 | Translative intelligencer apparatus providing polyindicative response My invention relates to improved means for a concealed structure detector apparatus, and more particularly, to a portable device producing a polyindicative, usually biphonic, sensory response capable of providing the operator with an indication of the rel... | 04/21/1981 |
| 4259667 | Information interchange between an intelligent operator, indicia bearing documents, and responsive apparatus Described is a method for utilizing a unique hand-held probe or the like, in conjunction with a responsive apparatus, as the means to establish cooperative response evaluation between an intelligent being and an evaluatory system. The method involves the ... | 03/31/1981 |
| 4255652 | High speed electrically responsive indicia detecting apparatus and method Apparatus for detecting and providing a signal from detection indicia that is applied to a substrate such as a controlled document for the purpose of determining the character of the document, the substrate comprising individual substrate members or an el... | 03/10/1981 |
| 4255710 | Plural search frequency directional metal detector apparatus having enhanced sensitivity A directional concealed object locator, say metal detector, employing a beat frequency oscillator and at least two search oscillators. The search oscillators each include a loop antenna which in part serves to determine the search frequency signal rate of... | 03/10/1981 |
| 4253045 | Flickering flame effect electric light controller An electric light controller which serves to connect and disconnect an electric lamp element load from a power source in such rapid-fire pseudorandom seuentiality that the electric lamp appears to the eye as an illusion simulating the fluctuant brightness... | 02/24/1981 |
| 4219799 | Vehicular signal apparatus My invention teaches a vehicular signal apparatus, in particular a motor vehicle horn system, which has two successive loudness levels of operation. The first loudness level is a moderate level used as a brief "toot" to give a quick alert, as in pedestria... | 08/26/1980 |
| 4196391 | Metal locator with stereotonic indication of translateral position A metal locator apparatus the preferred practice of which includes two electromagnetic field radiating inducers, which serve to act upon a metal object deposited in a covert medium from distinctly separate positions, including two separate search oscillat... | 04/01/1980 |
| 4166325 | Didactic apparatus including handheld responsor means A didactic, or teaching, apparatus upon which interrogatory documents, or test sheets, may be placed in the manner of an overlay on the face side of the machine. The interrogatory document, which contains at least one interrogative statement, or question,... | 09/04/1979 |
| 4161686 | Concealed structure tracing translator apparatus including position sensitive bitonic indication means My invention relates to improved method and means for a concealed structure tracing translator apparatus including position sensitive bitonic indication means. The purpose of my new invention is to provide an added dimension to the class of apparatus freq... | 07/17/1979 |
