Raytheon

About: Raytheon is a company organization based out in Waltham, Massachusetts, United States. It is known for research contribution in the topics: Signal & Antenna (radio). The organization has 15290 authors who have published 18973 publications receiving 300052 citations.

Intraoral occlusal telemetry III, tooth contacts in chewing, swallowing and bruxism

Abstract: IT IS CRITICAL in the study of occlusion to avoid cumbersome recording devices which trigger artificial neuromuscular reactions and create artifacts which could be interpreted as being physiologic. In recent years 6 it has become possible to study the dynamics of occlusion with miniaturized electronic equipment without interfering with normal function. A telemetric system developed in our laboratory registers occlusal contact in three to five different areas on the same tooth. 8 The multifrequency transmitter device used for this purpose is small enough to fit into the space of one missing molar. Some findings regarding the occurrence and frequency of single and gliding tooth contacts during chewing and swallowing and during bruxism are presented here.

Microwave and Millimeter Wave Power Beaming

Abstract: Power beaming is the efficient point-to-point transfer of electrical energy across free space by a directive electromagnetic beam. This paper clarifies the basic principles of power beaming in simple terms, and proposes a benchmarking methodology for improving the comparative assessment of power beaming systems and technology. An in-depth historical overview tracing the worldwide progress in microwave and millimeter wave (mmWave) experimental demonstrations over the past 60 years shows clear evidence of a significant increase in activity during the last 5 years. In addition, a review of progress in scalable rectenna arrays for the reception of microwave power beaming shows sufficient maturity for new research to initiate on the ruggedization, productization, and system integration aspects of the technology. A review of regulatory issues including spectrum management and safety indicates the need for additional technical solutions and international coordination. Breaking results reported in this paper include 1) data from the first in-orbit flight test of a solar-to-RF “sandwich module”, 2) the construction of multiple US in-orbit demonstrations, planned for 2023 launch, that will demonstrate key technologies for space-based solar power, and 3) a 100-kW mmWave power beaming transmitter demonstrating inherent human life safety.

Modular robotic crawler

Abstract: A modular robotic crawler can be formed by intercoupling a selected plurality of segment modules from a preexisting collection of differing compatible segment modules. The segment modules can have at least one intercoupleable interface. The selection can be based on a planned operational scenario of functions to be performed.

Sensor elements in multilayer ceramic tape structures

Abstract: A structure formed of a plurality of sheets which are laminated and fused together includes at least one sintered ceramic sheet formed from thermally fusible tape A sensor element, such as a cantilever, circular diaphragm, rectangular diaphragm supported at least two sides, or microbridge, is formed as a part of the ceramic sheet A hole may be formed through one of the sheets adjacent to the ceramic sheet to expose the sensor element to an ambient environment which is to be sensed Electrical signals corresponding to a physical change in the sensor element such as stress or displacement are generated by piezoresistor, variable capacitor, photodetector, or the like attached to or formed on the sensor element, which is interconnected with a metallization pattern formed on at least one of the sheets The thickness of the sheets is highly uniform, thereby producing sensor elements with precisely reproducible thicknesses and mechanical properties

Extended impingement cooling device and method

Abstract: An extended impingement cooling structure to cool outside an air supply plenum comprises an inner wall; an impingement sheet; a series of supports to maintain the inner wall in spaced relation to the impingement sheet, and a baffle supported between the inner wall and the impingement sheet. The baffle has a collector plenum area that receives impingement cooling air from the air supply plenum and a channel in fluid communication with the collector plenum and extending outside the air supply plenum with openings to allow impingement cooling air to pass therethrough and having a series of lands extending into the channel wherein the lands are located in proximity to impingement cooling air outlets in the inner wall.