Abstract: According to various embodiments of the invention, a map of injection pin profiles is experimentally determined at various locations spanning an engine operating plane. Injector pin profiles at points within the continuum spanned by the experimentally determined profiles are determined by interpolating between surrounding experimentally determined injector pin profiles. Various methods are used to adjust the interpolation procedure in cases where one injector pin profile has more or fewer points than the other injector pin profile.

Abstract: According to various embodiments of the invention, a map of injection pin profiles is experimentally determined at various locations spanning an engine operating plane. Injector pin profiles at points within the continuum spanned by the experimentally determined profiles are determined by interpolating between surrounding experimentally determined injector pin profiles.

Abstract: A back brace apparatus is disclosed which has electromechanical mechanism for tightening a brace around the trunk of a patient to a desired tension. The electromechanical mechanism is controllable by the patient to effect predetermined tension settings. A cable and pulley arrangement tightened by a motor provides a mechanical advantage so that the brace may be tightened by a small motor. A microprocessor controls the motor to obtain the desired repeatable tension settings.

Abstract: A back brace apparatus disclosed which has electromechanical means for tightening a brace around the trunk of a patient to a desired tension. The electromechanical means is controllable by the patient to effect predetermined tension settings. A cable and pulley arrangement tightened by a motor provides a mechanical advantage so that the brace may be tightened by a small motor. A microprocessor controls the motor to obtain the desired repeatable tension settings.

Abstract: A construction set is made up of a plurality of detachably chainable links capable of being pivotally attached to one another to form stable geometric structures. Detents are provided at a plurality of pivot positions so as to preferentially hold the engaged links in stable and precise positions relative one to another.

Abstract: A flying disk toy comprising a substantially planar disk configured to rotate about a central axis in sustained flight and a centrifugally activated sound generator associated with the disk is disclosed. The disk includes a cylindrical wall perpendicularly projecting from the plane of the disk and which is centrally disposed on the disk relative to its central axis. The centrifugally activated sound generator comprises two diametrically opposed centrifugal switches in series connection, each comprising a radially extending, axially inclined ramp, a pair of electrical contacts symmetrically disposed on opposite sides of the ramp in spaced apart relationship and an electrically conductive weight movably supported on the ramp.

Abstract: A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive positions from the opening to distribute equally the stresses at the different positions on the piezoelectric transducer. A plurality of such transducer assemblies may be disposed at spaced positions in an oil well with the support members supported on a support rail extending through the well. The support rail serves as an electrical ground. A bus bar extends through the well at positions corresponding substantially to the centers of the transducer assemblies. The bus bar is supported by electrically insulating spacer members extending from the support rail. A ring is supported at one end by the support rail and is coupled at the other end to a tubing. The tubing envelopes, the transducer assemblies, the support rail, the bus bar and the spacer members.

Abstract: A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive positions from the opening to distribute equally the stresses at the different positions on the piezoelectric transducer. A plurality of such transducer assemblies may be disposed at spaced positions in an oil well with the support members supported on a support rail extending through the well. The support rail serves as an electrical ground. A bus bar extends through the well at positions corresponding substantially to the centers of the transducer assemblies. The bus bar is supported by electrically insulating spacer members extending from the support rail. A ring is supported at one end by the support rail and is coupled at the other end to a tubing. The tubing envelopes, the transducer assemblies, the support rail, the bus bar and the spacer members.

Abstract: A casing in an oil well is constructed to provide for the flow of oil in the well. The casing cylindrical and may be perforated. The casing is resonant in a hoop mode at a particular fundamental frequency such as approximately 400 hertz. A transducer includes a transducer member disposed within a tubing in spaced relationship to the tubing. The transducer member may be a ceramic slotted at one end and supported by the tubing at the other end. A ring may envelope the ceramic member and may be slotted at the same position as the ceramic member. The tubing may be filled with a fluid which provides dielectric properties and operates to transmit vibrations from the transducer to the tubing. The transducer may vibrate in the hoop mode at the fundamental frequency of resonance of the casing. These vibrations are transmitted to the casing through the fluid in the tubing, the tubing and the oil in the casing to produce a resonance of the casing at the particular fundamental frequency in the hoop mode.

Abstract: A casing is disposed in an oil well and is constructed to provide for the flow of oil in the well. For example, the casing may be cylindrical and may be perforated in its cylindrical wall. The casing is resonant in a hoop mode at a particular fundamental frequency. This fundamental frequency may be in the order of approximately 400 hertz. A transducer includes a transducer member disposed within a tubing in spaced relationship to the tubing. The transducer member may be a ceramic slotted at one end and supported by the tubing at the other end. A ring may envelope the ceramic member and may be slotted at the same position as the ceramic member. The tubing may be filled with an oil which provides dielectric properties and operates to transmit vibrations from the transducer to the tubing. The transducer may vibrate in the hoop mode at the fundamental frequency of resonance of the casing. The transducer member is energized to obtain the production of vibrations in the transducer in the hoop mode.

Abstract: A canopy assembly for supporting an overhead ceiling fan to hang from an electrical box mounted in a ceiling including, a canopy having an upper open portion, a lower open portion and an interconnecting side portion and with the upper open portion surrounding and enclosing the electrical box and with the lower open portion having a particular size and configuration, means coupled to the canopy for connecting the canopy to the electrical box, a ball member for coupling to the ceiling fan for supporting the ceiling fan and with the ball member having an outer configuration matching the configuration of the lower open portion and having a maximum size greater than the particular size of the lower open portion, and the ball member for insertion into the canopy and with the ball member captured and supported by the lower open portion for the canopy to have the ceiling fan supported below the canopy.

Abstract: A back brace apparatus disclosed which has electromechanical means for tightening a brace around the trunk of a patient to a desired tension. The electromechanical means is controllable by the patient to effect predetermined tension settings. A cable and pulley arrangement tightened by a motor provides a mechanical advantage so that the brace may be tightened by a small motor. A microprocessor controls the motor to obtain the desired repeatable tension settings.