Improved table for cutting and welding
Welding table covered with parallel inverted steel angles improves metal torch cutting of various types and thicknesses.
Oliver, D. H.↗
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Freon, T-B1 cutting fluid
Improved cutting fluid completely controls the heat generated from machining operations, thus providing longer tool life. Fluid is especially useful in the working of plastics and replaces less efficient contaminating oils.
Peters, R. L.↗
An impact energy-absorbing strut employing tube cutting
Impact energy absorbing strut using tube cutting
Kaskey, A. G.↗
A calculation of edge smear in far-field holography using a short-cut edge trace technique
Edge smear in far field holography as function of interference orders, using short-cut trace technique
Robinson, D. M.↗
Material cutting, shaping, and forming - A compilation
Compilation of technology utilization articles on subjects of cutting, shaping, and forming of materials and application to industrial methods
Source record↗
Cutting thin sections of bone
Medical equipment for obtaining repetitive planoparallel sections of bone to study healing of bone structure under high gravity stress is described. Device consists of modified saw with diamond cutting edges. Construction of device and manner of use are explained.
Ashley, W. W.↗
A tool for cutting ultra thin slits in metals
Tool produces slits of 0.0305 mm widths in materials up to RC 50 hardness, minimizes material waste and improves precision. Device may be used for general metal cutting and for producing simulated cracks in metal samples used in fatigue tests.
Mcmahon, W.↗
Slitting flat conductor cables with the single cutting edge slitter
Manually operated slitter can cut single slit in flat conductor cable to any desired length. Lateral position of flat conductor cable is adjusted with aid of optical magnifier and cursor glass to ensure that slit is accurately placed between conductors. Multiple slits may be made by repeating procedure for single slit.
Angele, W.↗
Comparative cut-bar thermal conductivity apparatus.
Construction details, error analysis, and typical data for a rapid comparative device for thermal conductivity measurements are presented. The apparatus consists of a comparative cut-bar arrangement contained in a bell-jar. The cylinder shaped specimen is placed between two ARMCO-iron meter bars of the same diameter. The upper bar is equipped with a heater, while the lower one is terminated in a heat sink. The temperature gradient along the bars is measured with a series of copper/constantan microthermocouples, spot welded to them. The assembly is held together by loading the bars to a desired pressure, via a pneumatic cylinder. Contact resistance at the boundaries between the specimen and the meter bars is minimized by using a Hg/In/Ga alloy film at the interface and sufficient loading force. The gradients determined for the meter bars then may be extrapolated to the boundaries yielding the temperature drop along the specimen. Using two different length specimens, the magnitude of the temperature drop across the interface can be computed, or the true gradient along the specimen can be obtained from the difference in overall temperature drops and lengths.
Gaal, P. S.↗
A parametric study of cut-off corrugated surface properties
Corrugated horns involve a junction between the corrugated surface and a conducting groundplane. Proper horn design requires an understanding of the electromagnetic properties of the corrugated surface and this junction. Therefore, an integral equation solution has been used to study the influence of corrugation density and shape on the power loss. Surface current, and the scattering from a groundplane-corrugated surface junction. Both square and vee shape corrugations have been considered over the range of corrugation depths where the surface acts as a cut-off corrugated surface.
Mentzer, C. A.↗
Simplified cut core inductor design
Although filter inductor designers have routinely tended to specify molypermalloy powder cores for use in high frequency power converters and pulse-width modulated switching regulators, there are sigificant advantages in specifying C cores and cut toroids fabricated from grain oriented silicon steels which should not be overlooked. Such steel cores can develop flux densities of 1.6 tesla, with useful linearity to 1.2 tesla, whereas molypermalloy cores carrying d.c. current have useful flux density capabilities only to about 0.3 tesla. The use of silicon steel cores thus makes it possible to design more compact cores, and therefore inductors of reduced volume, or conversely to provide greater load capacity in inductors of a given volume. Information is available which makes it possible to obtain quick and close approximations of significant parameters such as size, weight and temperature rise for silicon steel cores for breadboarding. Graphs, nomographs and tables are presented for this purpose, but more complete mathematical derivations of some of the important parameters are also included for a more rigorous treatment.
Mclyman, W. T.↗
Acoustic liner optimum impedance for spinning modes with cut-off ratio as the design criterion
A new acoustic liner design procedure based upon model cut-off ratio is outlined. Proposed experiments to substantiate this design procedure are outlined.
Rice, E. J.↗
Inherent time delay for dielectric breakdown in shock-loaded x-cut quartz
Dielectric breakdown in shock-loaded x-cut quartz is examined under conditions of both impact loading and Q-switched laser-irradiation loading. It is observed that breakdown is characterized by an inherent time delay which depends on the magnitude of the electric field. For pulse duration less than about 30 ns, dielectric breakdown is not observed.
Graham, R. A.↗
Simplifier cut core inductor design
Advantages of specifying C cores and cut toroids fabricated from grain oriented silicon steels for use in high frequency power converters and pulse width modulated switching regulators are discussed. A method for rating cores assigns to each core a number which is the product of its window and core cross section area, called 'Area Product A sub p.' A correlation between the A sub p numbers and current density for a given temperature rise was developed. Also, straight line relationships were developed for A sub p and volume, A sub p and surface area, and A sub p and weight. These relationships can be used to simplify and standardize the process of inductor design. They also make it possible to design inductors of small bulk and volume or to optimize efficiency.
Mclyman, W. T.↗
Surface geometry of circular cut spiral bevel gears
The tooth surface principal radii of curvature of crown (flat) gears were determined. Specific results are presented for involute, straight, and hyperbolic cutter profiles. It is shown that the geometry of circular cut spiral bevel gears is somewhat simpler than a theoretical logarithmic spiral bevel gear.
Huston, R. L.↗
Measuring Contours of Coal-Seam Cuts
Angle transducers measure angle between track sections as longwall shearer proceeds along coal face. Distance transducer functions in conjunction with angle transducers to obtain relative angles at known positions. When cut is complete, accumulated data are stored on cassette tape, and track profile is computed and displayed. Micro-processor-based instrument integrates small changes in angle and distance.
Source record↗
Tooth profile analysiis of circular-cut, spiral-bevel gears
An analysis of tooth profile changes in the transverse plane of circular-cut, spiral-bevel crown gears is presented. The analysis assumes a straight-line profile in the mid-transverse plane. The profile variation along the centerline is determined by using expressions for the variation of the spiral angle along the tooth centerline, together with the profile description at the mid-transverse plane. It is shown that the tooth surface is a hyperboloid and that significant variations in the pressure angle are possible.
Huston, R. L.↗
Surface geometry of circular cut spiral bevel gears
An analysis of the surface geometry of spiral bevel gears formed by a circular cutter is presented. The emphasis is upon determining the tooth surface principal radii of curvature of crown (flat) gears. Specific results are presented for involute, straight, and hyperbolic cutter profiles. It is shown that the geometry of circular cut spiral bevel gears is somewhat simpler than a theoretical logarithmic spiral bevel gear.
Huston, R. L.↗