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| Number | Title | Issue Date |
| 4316270 | Digital time-delay beamformer for sonar systems There is described a digital sonar receiver having a novel beamformer, own doppler nullifier (O.D.N.), and adaptive time varied gain controller. The beamformer interrogates a multi-element transducer by utilizing an interleaved sampling scheme which sampl... | 02/16/1982 |
| 4316269 | Own doppler nullifier for sonar system There is described a digital sonar receiver having a novel beamformer, own doppler nullifier (O.D.N.), and adaptive time varied gain controller. The beamformer interrogates a multi-element transducer by utilizing an interleaved sampling scheme which sampl... | 02/16/1982 |
| 4282435 | Mono-energetic neutron void meter The ability to measure the ratio of vapor versus liquid in a nuclear steam generating system is highly desirable, particularly since, during transient events such as rapid depressurization, the vapor may not be in thermal equilibrium with its liquid and i... | 08/04/1981 |
| 4274148 | Digital time-delay beamformer for sonar systems There is described a digital sonar receiver having a novel beamformer, own doppler nullifier (O.D.N.), and adaptive time varied gain controller. The beamformer interrogates a multi-element transducer by utilizing an interleaved sampling scheme which sampl... | 06/16/1981 |
| 4197453 | Optical pattern tracer A pattern tracer having provision for recognizing special markings on the pattern termed "command marks" and for recognizing at least two different kinds of commands to enable special control of the machine tool controlled by the pattern tracer.... | 04/08/1980 |
| 4195265 | Variable response notch filter for machine resonance elimination in a servo control system This invention relates to a flexible notch filter for use in a servo system to eliminate natural mechanical resonance. The filter is an improved "twin-T" type where the "in-phase" output of the filter is fed back into the filter. Varying the feedback vari... | 03/25/1980 |
| 4160158 | Optical tracer back-up circuit A circular scanning optical pattern tracer produces two impulses per cycle, one impulse in the forward direction and one in the reverse. Means are provided to utilize either one of said impulses selectively to cause the tracer to proceed in a given direct... | 07/03/1979 |
| 4156342 | Cooling apparatus for a bearing in a gas turbine This invention relates to a method of thermally isolating a bearing located near the combustion region in a gas turbine. Air is bled from an intermediate stage of the compressor turbine and is arranged to be fed to the central pipe of a coaxial piping arr... | 05/29/1979 |
| 4146801 | Apparatus for protecting power transistors in an H configuration power amplifier This invention relates to the protection of power transistors in an H configuration power amplifier which drives a D.C. motor. When the amplifier is switched off, it may be possible for the base terminals of the transistors to be turned "on" which results... | 03/27/1979 |
| 4139329 | Vane tip motion transfer device This invention relates to a device which is capable of accurately transferring a rotating movement from a master control to a pivotal vane tip in a gas turbine engine. A series of stationary vanes which are housed inside the casing of a gas turbine are ea... | 02/13/1979 |
| 4130375 | Vane rotator assembly for a gas turbine engine This invention relates to a method of moving a set of adjustable trailing vanes in a gas turbine engine of the "split-shaft" type. The vanes are moved by an adjusting ring which is made to completely encircle the casing of the turbine and connect to each ... | 12/19/1978 |
| 4128297 | Variable lead optical tracing machine with scanning and vari-focal lens This application relates to circular scanning line tracers or edge tracers and has particular reference to means for producing adjustable lead. In tracing apparatus having a circular scan, the scanner scans in advance of the point of rotation of the traci... | 12/05/1978 |
| 4107352 | Chemical vapor deposition This invention relates to an improved method of depositing thin layers of material on a substrate by means of chemical vapor deposition and particularly to addition of gas to the chemical vapor gases, which additional gas reduces conductive heat loss and ... | 08/15/1978 |
| 4097187 | Adjustable vane assembly for a gas turbine This invention relates to a vane assembly for a split-shaft gas turbine engine. The invention relates to a vane assembly which is placed in the hot gas stream to control diffusion and to deflect the hot gas just prior to passage through the blades of the ... | 06/27/1978 |
| 4079439 | Loadcenter having a dual purpose neutral rail This invention relates to a distribution panelboard such as might be used for electrical service entrances. The panelboard differs from prior art designs in that the neutral rail which is generally found in previous designs at the top or bottom of the pan... | 03/14/1978 |
| 4060413 | Method of forming a composite structure Composite turbine blades and vanes have been proposed in the past formed from nickel or cobalt base superalloys and reinforcing fibres such as tungsten, molybdenum, silicon carbide, or graphite. One of the problems has been the spacing of the fibres and a... | 11/29/1977 |
| 4052685 | Current transformer A post type oil filled current transformer having a U-shaped primary winding formed of a tubular conductor. An oil flow controlling hollow tubular member is disposed within the primary conductor. The tubular oil flow controlling member is vertically orien... | 10/04/1977 |
| 4034558 | Cooling apparatus for split shaft gas turbine This invention relates to cooling a section of a split shaft gas turbine engine. Because combustion takes place in the region of the shaft-split, overheating may occur and care must be taken to ensure that this portion of the turbine is sufficiently coole... | 07/12/1977 |
| 3978658 | Variable load gas turbine A system for bypassing compressed air and regulating the fuel to rapidly vary the load on a gas turbine so that the turbine can absorb energy and pick up load rapidly without inducing high temperature stresses within the turbine.... | 09/07/1976 |
