Abstract: A pressure sensor including a pressure sensor element, a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element and a header, all of which are successively tightly bonded together. The pressure sensor also includes a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header. A region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped.

Abstract: An impact load effected on the single body of an acceleration sensor device is absorbed with a relatively simple construction, thereby protecting a semiconductor sensor element provided in the sensor. The acceleration sensor device comprises a semiconductor sensor element 2 which can sense an acceleration in a direction perpendicular to its principal plane, a base plate 3 which supports the sensor element 2, a package 11 which supports the base plate 3 and encloses the base plate 3 and the sensor element 2, a frame 12 which has a plurality of leg sections 12d protruding from a bottom plane of the package 11 and is fixed on the package 11, and a cap-shaped resin cover 13 which has a roof section 13a opposite to an upper surface of the package 11 or the frame 12 and covers the package 11 from above as fixed on the package 11, and a side wall section 13b of the cover 13 extends at least to a position corresponding to a place where the sensor element 2 is arranged.

Abstract: A semiconductor acceleration sensor includes a substrate, a semiconductor sensor chip with a diaphragm and having one end fixed to a pedestal, the pedestal including at least one thick film layer and disposed on the substrate, and a protrusion of at least one thick film layer on the substrate directly opposite a free end of the sensor chip, shorter than the pedestal. The protrusion protects the semiconductor sensor chip from breakage at the diaphragm due to impacts.

Abstract: The present invention is related to a rubber vibration insulator comprising a rubber composition for a rubber insulator wherein at least one selected from unsaturated fatty acid amide and N-substituted fatty acid amide is contained. For this reason, friction coefficient can be greatly reduced in wide temperature range including low temperature range and high temperature range, not in a narrow temperature range near to a normal temperature. Furthermore, the above unsaturated fatty acid amide can be easily melted in a rubber compound so as to be mixed into a normal kneading operation resulting in a superior workability.

Abstract: An externally cooled cylindrical vessel has a draft tube centered in the lower half thereof. A continuous circulation seeded with tartars crystals includes a fast downward flow through the draft tube and a slow upward flow outside the draft tube. The circulation induces crystal growth and the removal of tartars from the liquid. A coning zone is defined in the vessel above the draft tube. The slow upward flow moves toward the calming zone, facilitating classification of the crystalline matter which is reintroduced into the fact downward flow. The liquid product from which the tartars has been removed and which is collected in the upper section of the vessel is tapped off by an overflow port located near the top of the vessel.

Abstract: An externally cooled cylindrical vessel has a draft tube centered in the lower half thereof. A continuous circulation seeded with tartars crystals includes a fast downward flow through the draft tube and a slow upward flow outside the draft tube. The circulation induces crystal growth and the removal of tartars from the liquid. A coning zone is defined in the vessel above the draft tube. The slow upward flow moves toward the calming zone, facilitating classification of the crystalline matter which is reintroduced into the fact downward flow. The liquid product from which the tartars has been removed and which is collected in the upper section of the vessel is tapped off by an overflow port located near the top of the vessel.

Abstract: A color developer containing a combination of zinc oxide, at least one salicylic acid or nuclear substituted salicylic acid, and at least one metal silicate as an inorganic pigment, and a recording unit having a layer of the color developer. The color developer has a high developing ability and is capable of forming a distinct color having a high light resistance when it is contacted with a color former.

Abstract: A recording sheet capable of forming a color when brought into contact with an electron donating color former, which is prepared by coating a dispersion comprising (1) a polyvalent metal salt of an aromatic carboxylic acid, (2) a montmorillonite clay mineral, (3) zinc oxide, and (4) a binder, and which contains about 30 to 60 wt. % solid ingredients and has a viscosity of about 50 to 7,000 cps.

Abstract: A recording material in which a particular salicylic acid derivative is employed as a color developer, which derivative is a reaction product of a styrene dimer, an alkylstyrene dimer or the halogen substituted products thereof which material exhibits improved water resistivity, keeping stability and workability, does not produce color contamination when dipped in water and can exhibit its color-developing ability without special treatment.

Abstract: A recording sheet for pressure-sensitive copying paper is produced by coating on a support a coating composition containing a water-soluble polyvalent metal salt and then a coating composition containing an alkali metal salt or an ammonium salt of an aromatic carboxylic acid.The recording sheet has excellent flatness and surface strength.

Abstract: A recording sheet capable of developing color when contacted with substantially colorless electron donating organic compounds functioning as a color former comprising a support having thereon a layer of a dispersion comprising (1) at least one salt of a polyvalent metal and an aromatic carboxylic acid, as a color developer, (2) at least one water-soluble polymer containing hydroxyl groups and (3) at least one of a melamine resin and a urea resin.

Abstract: The specification discloses a self-hardening mold sand having surface stability and high compressive strength yet containing a comparatively small amount of water. The mold sand is prepared by mixing a self-hardening binder of clinker powder, containing 11CaO.7Al.sub.2 O.sub.3. CaX.sub.2 (where X is a halogen atom) and a sulphate, with a binder additive consisting of a surface active agent of which the main component is .beta.-naphthalene-sulphonic acid formaldehyde condensate salt, and then mixing this binder and binder additive with sand, water and preferably a retarder consisting of an organic carboxylic acid or boric acid.

Abstract: In a pressure sensitive recording sheet comprising a layer of microcapsules containing a color former and a color developer, said layer of microcapsules and said color developer being on the same or independent supports, the improvement which comprises said developer being a polyvalent metal salt of a substituted salicylic acid represented by the general formulae (I) or (II): ##STR1## wherein R represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, R.sub.1 represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group and Ar and Ar' which may be the same or different each represents an aryl group.

Abstract: Desensitizer compositions which reduce or extinguish the capability of developers to color colorless compounds which comprise one or more desensitizers and one or more compounds having an absorption peak in the wavelength region of from about 300 m.mu. to about 400 m.mu. and a molecular absorption coefficient of above about 2000.

Abstract: A process for the production of a color developer comprising reacting an alkali metal salt of an aromatic carboxylic acid and a water-soluble metal salt in the presence of clay and a water-insoluble aluminum compound.

Abstract: A recording sheet comprising a support having thereon a layer of a color developer capable of forming a developed color image in the presence of a color former, wherein the color developer layer contains (1) a dimer of a compound of the formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and n is an integer of 1 to 4, as a color developer, and (2) an oil adsorptive inorganic pigment.

Abstract: This invention relates to mixtures of molding sand which comprise a mixture of a molding sand with a rapid hardening cement containing calcium aluminate as amorphous glass and/or crystals, and/or calcium haloaluminate, a polymer water holding agent and a lime, or mixture of a molding sand with the above-mentioned rapid hardening cement, a polymer water reducing agent, a lime, and, if necessary, a foaming agent, and in either case with water. The mixture also provides a method of mixing the ingredients except for water and then kneading the mixture with water.

Abstract: A recording sheet comprising a support and a developer layer, which develops color images on reacting with a color former, on the support containing a dimer of the compound represented by the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and n is 1 to 4.

Abstract: A recording method and material employing a basic color former component which changes to a colored species by an interaction with a cellulose fiber and has a molecular extinction coefficient of not less than about 100 in an ethyl alcohol solution.

Abstract: This invention relates to a super rapid hardening mixture comprisingA. a super rapid hardening cement in which 11CaO.7Al.sub.2 O.sub.3. CaZ (X is a halogen atom), 3CaO.SiO.sub.2 and CaSO.sub.4 are present as indespensable components;B. at least one short range strength accelerator selected from the group consisting of a calcium aluminate material, a lime material, an amine and an ethylene glycol material and calcium sulfate hemihydrate;C. at least one emulsion selected from the group consisting of a bituminous emulsion, a rubber latex and a resin emulsion;D. from 12 to 50 weight percent of water in the total mixture.