Ford Motor Company

About: Ford Motor Company is a company organization based out in Dearborn, Michigan, United States. It is known for research contribution in the topics: Internal combustion engine & Signal. The organization has 36123 authors who have published 51450 publications receiving 855200 citations. The organization is also known as: Ford Motor & Ford Motor Corporation.

Frequency independent beam waveguide

Abstract: A frequency independent beam waveguide comprises a row of equispaced identical axisymmetric phase setting means (1), which may be lenses or reflectors, or a combination of both, spaced a distance D apart from each other. The focal length of each phase setting means (1) is D/2. A launcher (2) spaced a distance D away from the first phase setting means (1A) in the row emits a beam of electromagnetic energy in the direction of said row. The phase and amplitude distribution in the cross-section (A) of the beam at the mouth of the launcher (2) is duplicated every other phase setting means (1) along the row (at locations B), independent of the frequency of the launched beam. As a result, the beam propagates along the row.

Stress and Structural Relaxation in Tempering Glass

Abstract: Temper stresses are brought about, primarily, by a partial relaxation of transient stresses generated by rapid cooling of the glass. Stress relaxation under nonisothermal conditions is competently handled by a mathematical tempering model, in which glass is treated as a simple viscoelastic material. However, this model proved inadequate in some respects since the properties of glass depend not only on its instantaneous temperature but also on its prior thermal history. A tempering model was therefore developed that incorporates both stress and structural relaxation. Predictions of this structural model are compared with experimental data on tempering and contrasted with predictions of the viscoelastic model. Such comparisons revealed that, typically, structural relaxation accounts for approximately 24% of the total residual temper stresses.