Abstract: This disclosure relates to a massage arrangement of the pneumatic type comprising a mat body provided with a plurality of juxtaposed air chambers, said mat body being subjected over the entire or local surface to repeated rhythmic wave motions involving expansion and contraction by repeating a successon of feeding and discharging of compressed air into and from said air chambers, whereby effective and stable massage is applied not only to the waist and back regions but also the neck and shoulder regions.

Abstract: A massager is composed of a linear compressor having a piston reciprocated by force of electromagnetic attraction to produce compressed air at a safe pressure with a relatively small difference between the rated pressure and the maximum pressure, a distributor for allowing the compressed air fed from the compressor to be selectively discharged therefrom and a bag having a plurality of air tight sections which are successively expanded by receiving the compressed air fed from the distributor.

Abstract: A spontaneous convection type solar heat collector arrangement including a reservoir in which a fluid is disposed. The reservoir includes an upper portion, a lower portion and an inner surface. At least one double-tubing type solar heat collecting tube having an open end and a closed end is positioned within at least one connecting opening provided in the lower portion of the reservoir. Insulating material is operatively positioned around the reservoir for protecting and insulating the reservoir. The open ends of said double-tubing type solar heat collecting tube is positioned in a fixed fluid-tight manner to the connecting opening and is mounted flush with the inner surface of the reservoir for increasing the area of fluid circulation within the reservoir.

Abstract: A holder arrangement for the reciprocating rod of an electromagnetic reciprocator includes a reciprocating rod capable of reciprocating axially by magnetic action or the alternate combination of magnetic and spring actions, thereby effecting movement of a working member or members mounted at one end or both ends of said rod over a given stroke. In this arrangement, a flexible rod holder is disposed at a suitable position of a base to which an electromagnet is attached, said holder being provided with a flexible tongue piece for holding said reciprocating rod.

Abstract: A drilling machine including an electric drill being selectively fixed at a desired angle with respect to a workpiece and a manual feed handle for moving the electric drill toward and away from the workpiece. A control circuit for the electric drill is provided having a sensor member being operatively connected in said control circuit for detecting a load applied on the electric drill. An alarm member is operatively connected in the control circuit for sending out a signal when a load signal exceeding a first reference level is detected. A switch is operatively connected in the control circuit for deenergizing said control circuit for the electric drill when a load signal exceeding a second reference level is detected.

Abstract: A pneumatic massage mat comprises a plurality of juxtaposed air chambers which are expanded and contracted in given sequence by sequentially feeding and bleeding air under pressure into and out of the respective chambers. The air space of each said air chamber is narrowed in the width direction at a substantially central portion and opposed end portions with respect to the longitudinal direction of the chamber such that these narrow portions are filled with a smaller volume of air than the remaining portions.

Abstract: A retaining device for an inner tube of an evacuated double-tubing type solar heat collector having a ring formed around an outer periphery surface of an inner tube and at least three equally spaced-apart leaf springs being affixed to the ring at right angles to the diametric direction thereof. Each leaf spring is constructed from a narrow metal strip bent into a corrugated or gentle saw-tooth shape. The leaf springs having portions for contacting an inner surface of an outer tube formed at bent crest portions, and portions for contacting the outer surface of the inner tube formed at bent trough portions. The leaf springs are bent centripetally inward at one end thereof and formed into respective holders of a getter metal at the inwardly bent portions.

Abstract: A pipe coupler including a socket having a valve member provided with a fluid passage and a plug designed to engage and open the valve member. A locking ball is provided to retain the plug relative to the socket after insertion therein. The valve member includes a blank flange normally engaged against an annular seal to close the fluid passage. A locking ball-bearing annulus is slidably mounted within the socket to normally hold the locking ball in a disengaged position. A single O-ring is positioned between the valve member and the bearing annulus in such a manner that the single O-ring is not subjected to any axially excessive force when the blank flange engages the annular seal. The single O-ring includes an outer surface and an inner surface which seal against the inner surface of the socket and the outer surface of the plug, respectively.

Abstract: A stabilization device for the stand of a drilling machine which comprises a casing secured to the rear of the stand and having a vertical stepped opening and a horizontal opening intersecting the vertical opening at right angles, a punch received in the casing for upward and downward movement and having a pointed projection extending downwardly from the lower end of the punch, a compression spring received in the casing to normally bias the punch downwardly and a spring loaded stop normally biased into the horizontal opening.

Abstract: A portable type solar heat cooker assembly including a cooking glass tube comprising an outer bottomed glass tube and an inner bottomed glass tube coated with a selective absorption film showing a high absorptivity in the solar radiation spectrum zone and a low absorptivity in the heat radiation spectrum zone. The inner tube is coaxially inserted into the outer tube and hermetically sealed together at their open ends, with a space therebetween being evacuated to vacuum. A case is provided to open on hinges and to receive the cooking glass tube at its central portion. A curved reflector is bisymmetrically provided on the case, which forms a reflex mirror for the solar rays when the case is opened. A tiltable stand attached to the outside of the case is provided to support the case in an inclined state.

Abstract: A solar heat collector including an outer subtantially straight tube being closed at one end and open at the other end and an inner substantially straight tube being closed at one end and open at the other end. The inner and outer tubes are hermetically sealed at their open ends with the space therebetween being evacuated to a predetermined degree of vacuum. A hairpin pipe for circulation of fluid media is disposed within the inner tube and includes two substantially straight sections wherein both or at least one of which is in surface contact with the inner surface of the inner tube. A pair of heat-conducting members are disposed within the inner tube and include arc portions and inwardly bent flat portions. The arc portions are semi-circular in shape and are joined to the inwardly bent flat portions through transient portions inclined at an angle .theta. wherein 120.degree..ltoreq..theta..ltoreq.150.degree..

Abstract: An air bubble generating apparatus for use in a bathtub filled with hot water, which has two air bubble generating boards inside which spacers and central air passages are provided and which are capable of being bent at the middle portion thereof. A large number of air bubbles are genertaed by supplying compressed air into the air bubble generating boards with the apparatus disposed with one of the boards is positioned along the bottom of the bathtub and the other board along the side wall thereof, consequently to bring about a considerable massaging effect on the whole body of a subject.

Abstract: A vacuum glass tube type heat collector tube with a substantially straight, double cylindrical construction is closed at its initially open end with an end cap having two or more separate ports for heat transmitting medium. A solar system unit is made up of a center conduit with two separate medium passages and a plurality of such heat collector tubes combined in a rib like arrangement with a valve mechanism arranged at every junction of the center conduit with the tubes which instantly closes upon accidental breakage of the associated tube. Easy drainage of the medium releaves the tubes from breakage due to medium freezing and instant closing of the valve upon tube breakage enables free replacement of the broken tube without any interception to the normal operation of the remaining part of the unit.

Abstract: A bubble generator is comprised of a bubble plate and an adjuster plate slidably coupled to each other, the former being provided with parallel small bubble holes rows and the latter with parallel small slot rows, large slot rows and large bubble hole rows. Mutual sliding between the plates allows three different modes of bubble generation at user's free choice.

Abstract: A bubble wash unit is provided with a wash basin for filling water, a stand assembly disposed to the bottom of the wash basin via bayonet coupling, and a bubble assembly disposed to the wash basin via snap coupling while astriding the upper edge of the wash basin in order to pneumatically connect an easily disassembable bubble disc placed on the inside bottom of the wash basin to a compressor suspensibly held within the stand assembly. Easily disassembable construction via bayonet or snap coupling enables complete protection of the compressor against wetting, easy transportation and handling of the unit, and easy replacement and/or cleaning of mechanical elements. A suspensible support successfully damps vibration of the compressor.