The breakaway torque wrench generally includes a handle portion and an arcuate engagement portion. The arcuate engagement portion further includes at least one engagement tooth portion proximate one end of the arcuate engagement portion for secureable releasable engagement with an axial grooved fastener or object such as a pipe, nut, bolt, screw, and the like. The breakaway torque wrench is engageable and capable of disengagement at predefined torque levels without implementing complex and vulne...

A swing apparatus, used primarily for the amusement of children, comprising a partially enclosed seating platform suspended by vertical hangers from an overhead support structure and a linkage mechanism which is used to initiate and sustain the swing pendular motion.

A swing having a stationary support member to which is pivotally attached to first and second arms. The first and second arms are in turn pivotally attached by connectors on side wings that extend from a base member. The base member has an arcuate surface that extends from a first end to a second end with the side wings extending on a tangent from the second end for a fixed distance to a terminus point. The center of gravity of the attached base member is selected such that the base member is in...

A swinger's position elevatory swing is disclosed. The swing lets manual and mechanical elevation of swinger's position by swinger's feet or hands at about the highest position of the swinger and thereby increasing the swinging times due to increased potential energy of the sitting board loaded with the swinger. A fixed sitting board is fixed to the swing ropes and has an arcuate hollow guide pipe and a fixing pipe. A movable sitting board is coupled to the fixed board and has an arcuate slide b...

Self-starting, quiet, surge-free circulation of aquarium water to an accessory such as a filter or germicidal lamp is achieved by a system including an airlift into a substantially airtight accessory where the air and water are trapped so as to provide a pressure to lift the water out of the accessory. Air other than the quantity remaining trapped is bled through a constricted passage into the outflowing water tube, and appears to aid its outflow by a blowing action resembling an airlift.

Silver halide photographic emulsions used for electron beam recording which comprises at least one compound represented by formula (I) or (II), or salts thereof: ##SPC1## Wherein X represents an oxygen atom, a sulfur atom or N-H, X' represents a sulfur atom, R.sub.1 and R.sub.2 represent each a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group or a 5 or 6-membered heterocyclic group having at least one nitrogen atom, or a condensed cyclic group the...

A catalyst selected from the group consisting of noble metals, transition metals, lanthanide series metals, mixtures and alloys thereof, which have limited activity because of absorbed halide ions, may be employed in electrodes of a fuel cell containing a halide ion free acid electrolyte provided that, prior to its operation in the fuel cell, the catalyst has been treated with a basic solution having a pH in the range of 8 to 14 for a period of time sufficient to desorb the halide ions.

A portable printing system is provided for printing an image, such as alphanumeric or symbol information on a moveable recording medium, such as a tape, a sheet or the like, by means of manual scanning of the recording medium relative to the printing system. The printing system comprises a hand-held printer unit including a print head having an array of printing elements in combination with an adjacently disposed drive roller both disposed in cooperative arrangement along one edge of the printer...

An image reading and recording apparatus includes a read/write head in which a reading head and a recording head are assembled into a unitary head body, a sheet feeding mechanism for feeding a sheet in engagement with the head body at a predetermined engagement position, wherein the reading head and the recording head are provided respectively on the head body such that a distance between the reading head and the engagement position is set larger than a distance between the recording head and th...

A new bungee swing for providing swinging and bouncing motions. The inventive device includes a flexible seat. A pair of bungee cords each have lower ends coupled with respect to the flexible seat and upper ends coupled with respect to an elevated overhang.