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| Number | Title | Issue Date |
| 4241557 | Construction member and plate therefor The invention comprises an improved construction member and a plate therefor wherein the construction member comprises an upper and a lower chord preferably interconnected by a web or strut and rigidly joined by a perpendicular spacer lock plate or plural... | 12/30/1980 |
| 4237535 | Apparatus and method for receiving and servicing request signals from peripheral devices in a data processing system Peripheral devices of a microprocessor controlled system initiate service request signals which are sent to a system controller over a single dedicated request line. Such request signals are accepted by the system controller on a priority basis, with only... | 12/02/1980 |
| 4237497 | Programmable multi-channel audio playback system A programmable multi-channel audio playback system includes a tape having recorded thereon a plurality of segments of information on multiple channels, with the segments being separated by gaps containing no information, control apparatus for causing the ... | 12/02/1980 |
| 4235230 | Iodine composition and method for prevention and treatment of dialysis induced peritonitis A composition and method for use with peritoneal dialysis patients for preventing or treating dialysis induced peritonitis. The method utilizes a flush solution of normal saline to prepare the peritoneal cavity for infusion of a dilute iodine solution whi... | 11/25/1980 |
| 4233842 | Apparatus for measurement of expiration fluids A dynamic method and apparatus for determining the rate of expiration of a selected fluid constituent expired by a living subject during respiration. The apparatus includes a fluid path system which conducts the expired air to a first fluid detector which... | 11/18/1980 |
| 4232898 | Conformable seatback cover A conformable seatback cover adapted for ease in installation while retaining a professionally fitted appearance, and constructed of heavy, non-stretchable material. The conformable structure of the cover is developed by prestructured front and back panel... | 11/11/1980 |
| 4231106 | Performance monitor apparatus and method Performance monitor apparatus is adapted to monitor various computer program events such as the length of time required to execute a particular program, the number of times a particular program or instruction sequence is executed during some predetermined... | 10/28/1980 |
| 4218755 | Weather forecasting apparatus Weather forecasting apparatus for producing a visual indication of a weather forecast in response to supplied information, with such supplied information including current weather conditions, current wind speed and wind direction, geographical region info... | 08/19/1980 |
| 4217573 | Switching unit for selectively connecting together various combinations of audio subsystems A switching unit selectively couples together various combinations of audio subsystems from three or more different groups of such subsystems, to thereby allow a complete audio system to be "constructed" for use. The switching unit is designed to be used ... | 08/12/1980 |
| 4216998 | Method of underground mining by pillar extraction A method of sublevel caving and pillar and top coal extraction for mining thick coal seams includes the advance mining of rooms and crosscuts along the bottom of a seam to a height of about eight feet, and the retreat mining of the top coal from the rooms... | 08/12/1980 |
| 4216198 | Self-regenerating method and system of removing oxygen and water impurities from hydrogen gas Oxygen and water impurities are cleaned from hydrogen, which is to be stored in tanks containing a hydride-forming metallic alloy, using a novel, self-cleaning filter system. The impurity-containing hydrogen gas is first passed through a catalyst bed comp... | 08/05/1980 |
| 4215377 | Multi-speed tape cassette system A multi-speed tape cassette system includes a tape cassette having a removable tab centrally located over a cavity disposed on the leading edge thereof, and a tape player operable to reproduce information contained on the tape cassette at one speed if the... | 07/29/1980 |
| 4214981 | Steric field-flow fractionation A steric field-flow fractionation system including a flow channel adapted for use with a carrier stream of fluid having particles suspended therein and a force field disposed across the flow channel to cause migration of the particles to a restraining wal... | 07/29/1980 |
| 4211419 | Game board and apparatus Game apparatus including a gameboard having an arrangement of pairs of columns, each column pair having its members aligned in opposing orientation and being arranged in side-by-side relation to others pairs of columns, each column being broken into segme... | 07/08/1980 |
| 4211239 | Neonatal oxygen consumption monitor An oxygen consumption monitor system suitable for use in measuring oxygen uptake in neonates wherein the system includes a check valve system in combination with a high flow, positive-end-expiratory-pressure respirator for supplying a high volume, control... | 07/08/1980 |
| 4210511 | Electrolyzer apparatus and electrode structure therefor Electrolysis apparatus and electrode structure comprising a solid polymer electrolyte membrane, a porous cathode plate, and a porous anode plate which is electrochemically compatible with the cathode, so that the anode plate and cathode plate are substant... | 07/01/1980 |
| 4209903 | Sprinkler head trimming device A cutting device for trimming grass and removing soil and debris from around a sprinkler head. The device includes a shaft with a handle mounted at one end to permit the user to push down and turn the device at the same time. A tubular cutting member is m... | 07/01/1980 |
| 4207943 | Countercurrent solid-to-solid heat transfer apparatus and method Apparatus for transferring heat between solid particles includes a rotatable cylindrical drum which includes plates mounted on the interior surface of the drum wall to extend inwardly thereof. Also included is an elongate vibratory screen disposed within ... | 06/17/1980 |
| 4202052 | Extendable infant sheet and sleeper A crib sheet for retaining an infant in a central region of a crib or bed and preventing such an infant from displacing a blanket covering when unattended. The sheet includes a central pleat which extends along the entire sheet length and is sewed or othe... | 05/13/1980 |
| 4201910 | Photosensor assembly A photosensor system includes a housing in which are defined a primary passage, and a secondary passage intersecting the primary passage at substantially a right angle. A light source is disposed in the secondary passage to direct light toward the interse... | 05/06/1980 |
| 4199014 | Automatic feeding screwdriver A power screwdriver for use with a flexible string of disconnected screws retained in head to tip orientation by attachment to a continuous length of plastic, paper or similar flexible material. The string of screws feeds into a rearward section of a reci... | 04/22/1980 |
| 4198851 | Method and structure for detecting the concentration of oxygen in a substance A field-effect transistor structure is utilized for detecting the concentration of oxygen in a substance to which the structure is exposed. The structure includes a semi-conductor substrate material having one doping polarity, a pair of spaced apart diffu... | 04/22/1980 |
| 4198574 | Timing control circuit A timing control circuit for use in automatically and intermittently operating electrical appliances, such as lamps, for security purposes in homes, offices and other buildings. The circuit is adapted to plug into a conventional wall socket and to receive... | 04/15/1980 |
| 4197561 | Portable recorder apparatus for recording time-related data A portable data recorder for recording time-related information on tape cassettes. The recorder includes a briefcase shell in which the other components are mounted, a keyboard having a plurality of keys each of which, when depressed, produces a signal, a... | 04/08/1980 |
| 4196545 | Window structure A window structure adapted for easy placement in and removal from a conventional window frame. The window structure includes a generally planar, rectangular window pane constructed of glass, acrylic resin, or the like. Also included are four frame members... | 04/08/1980 |
| 4195933 | Method of mixing mortar A portable mixer includes a generally cylindrical housing open at one end thereof, and a mixer blade disposed to rotate within the housing. Located at the other end of the housing is a driven pulley coupled by a belt to a drive pulley mounted on a motor. ... | 04/01/1980 |
| 4195642 | Wearable heart rate monitor A wearable heart rate monitor includes a wrist cuff or strap suitable for being placed about the wrist of a person, a display housing mounted on the wrist cuff, a pressure transducer element also mounted on the wrist cuff at a position to cover the radial... | 04/01/1980 |
| 4191297 | Support and cover restraining device for refuse containers A support and cover restraining device for holding refuse containers including a post with mounting brackets for attaching a plurality of refuse containers and a guide rod projecting from the top of the post for mounting support arm structure having conta... | 03/04/1980 |
| 4190856 | Three dimensional television system A method and apparatus for producing a three-dimensional picture suitable for use with television systems. A set of representations of differing cross-sections of a scene is displayed on one or more display screens. These displayed representations are opt... | 02/26/1980 |
| 4187619 | Strap fastening means for a sock and shoe combination The invention comprises a connector which can be detachably fastened at one end to the rear of a sock at or above the heel region and which can be detachably fastened at the other end to the outside of the rear or heel region of a shoe. This connector, wh... | 02/12/1980 |
| 4187489 | Method and apparatus for propagating electrical signals through a conducting dielectric fluid Apparatus for propagating electrical signals through a conducting dielectric fluid such as salt water includes a pair of electrodes, one of which is a point electrode composed of a nipple or finger-like member, and the other of which is a plane electrode ... | 02/05/1980 |
