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| Number | Title | Issue Date |
| 5381022 | Combined optical waveguide and prismatic liquid-level sensor In its preferred embodiment, a one-piece optical-prism sensor of liquid level internally incorporates waveguide structure, i.e., within the otherwise conventional conical external profile of the prism, the waveguide being a thin flat member which includes... | 01/10/1995 |
| 5180298 | Hydraulic pump with foamed elastomeric member in outlet chamber to reduce liquid-borne noise A noise-absorbing medium is provided as an insert within the inner volume of the outlet chamber of a displacement-type pump. In an axial-flow displacement pump, this is the chamber into which pumped hydraulic fluid is discharged, for side-ported delivery ... | 01/19/1993 |
| 5171933 | Disturbed-gun aiming system A manually movable gun is mounted to a platform with a limited range of correctional computer-controlled updated reorientation in azimuth and in elevation with respect to the platform. The platform fixedly mounts a sighting-rangefinder system, so that cor... | 12/15/1992 |
| 5096295 | Scanning monochromator In its preferred embodiment, a scanning monochromator uses a pulse-driven micro-stepping motor to drive a spectral-dispersion element via a reduction-gear harmonic drive. The motor is directly coupled to the input hub of the reduction-gear drive, and the ... | 03/17/1992 |
| 5088324 | Combined liquid-level and conductivity sensor The invention contemplates a sensor head which senses liquid conductivity as well as liquid level. An optical prism is configured to provide two internal reflections of light entering on a first-axis alignment of 45° incidence for the first internal refl... | 02/18/1992 |
| 5070220 | Flow-switch construction A flow-sensing configuration embodies straight-through geometry between inlet and outlet ports, all on a single central axis, using reed-switch and magnet technology to produce a logic output. Virtually all parts are of molded plastic, and the inlet and o... | 12/03/1991 |
| 4996396 | Flow switch The invention contemplates a flow-switch construction of the straight flow-through variety wherein a magnet-bearing piston is displaced in response to a hydraulic-flow condition and in the displacement is caused to operate a magnetic-reed switch. The pist... | 02/26/1991 |
| 4995721 | Two-dimensional spectrometer A double-pass two-dimensional spectrometer utilizes a telescope wich contains only reflective optical components and is therefore free of chromatic aberrations. The telescope is so used in combination with dispersing optics as to allow double-pass use of ... | 02/26/1991 |
| 4984888 | Two-dimensional spectrometer The invention contemplates a two-dimensional spectrometer wherein a single catadioptric system is both the collimator and the camera for two-pass use of any two-dimensionally dispersed spectrometer. Off-axis aberration effects are minimized by arranging a... | 01/15/1991 |
| 4979797 | Multi-level fiber-optic liquid-level sensing system Plural sensor prisms and associated opticalfiber circuits are arrayed as a single vertical stem by which the individual prisms serve for response to each of a plurality of different liquid levels. Each prism is formed of light-transmitting plastic materia... | 12/25/1990 |
| 4880990 | Optical liquid-level sensing apparatus An optical sensor element provides cantilevered support of a bent length of glass-rod core of first refractive index having a cladding of second refractive index that is less than the refractive index of the core, and wherein the outer radius of the bend ... | 11/14/1989 |
| 4867199 | Bi-petal l check-valve construction A stiffly compliant upstop extends parallel to the hinge axis of a bi-petal check valve and provides essentially a continuous line of contact with the downstream side of each valve member. This line of contact is symmetrically located to span virtually th... | 09/19/1989 |
| 4862583 | Method of making a fiber-optic reed switch A magnetically responsive reed switch assembly having one or two cantilevered reed members arranged to close and open a gap responsive to respective levels of magnetic exposure, supports two optical fiber members in end-to-end closely spaced confrontation... | 09/05/1989 |
| 4862124 | Fiber-optic reed switch A magnetically responsive reed switch assembly having one or two cantilevered reed members arranged to close and open a gap responsive to respective levels of magnetic exposure, supports two optical fiber members in end-to-end closely spaced confrontation... | 08/29/1989 |
