Abstract: A control system automates operations of a chainsaw mill. The chainsaw mill has at least one powerhead, and at least one travel motor that mechanically engages with a drive belt to drive the at least one powerhead along a guide track. A tension sensor measures tension on the drive belt, and a powerhead sensor produces a revolutions per minute (RPM) measurement of the at least one powerhead. A powerhead controller is responsive to the RPM measurement for controlling the powerhead's throttle to keep the RPM near a predetermined RPM setpoint. A travel motor controller is responsive to the tension measurement for controlling the at least one powerhead's transit speed along the guide track to maintain drive-belt tension near a predetermined tension setpoint.

Abstract: A tube seal assembly includes a nipple connected to a first fluid passage and a seal assembly connected to a second fluid passage. The seal assembly includes a cylindrical member attached to the second fluid passage and having a radially extending flange. A seal member includes a metal reinforcement with a cylindrical outer wall and a radially inwardly extending flange at a first end of the cylindrical outer wall. An over-molded seal body includes a locking feature on an interior surface of the cylindrical outer wall that engages the radially extending flange to retain the seal member to the cylindrical member. The over-molded seal body further includes a first sealing lip extending from the radially inwardly extending flange and received against an inner wall of the cylindrical member. An interior surface of the first sealing lip includes a sealing bead engaging the nipple.

Abstract: A gasket includes a plurality of compression limiters each including a plastic body having a fastener aperture extending there through and a plurality of flow holes extending there through. An elastomeric body defines a perimeter sealing body molded around the plurality of compression limiters at spaced locations around the perimeter sealing body. The elastomeric body extends through the plurality of flow holes in the plurality of compression limiters.

Abstract: A device for storage, generation, transmission, distribution and/or other use of electrical energy, comprising a flame retardant molded article, comprising a polymer matrix containing a crosslinked aliphatic polyketone (PK) in combination with at least one flame retardant and to a method for improving the flame retardant properties of molded articles for electrical devices. In addition electric vehicles, battery energy storage systems, power tools and devices for power generation and to parts therof, comprising a flame retardant molded article, comprising a polymer matrix containing a crosslinked aliphatic polyketone (PK) in combination with at least one flame retardant.

Abstract: Thermally conductive electrically insulating compositions and structures and devices comprising such materials. In various embodiments, such materials comprise liquid crystal polymer and fillers, wherein the fillers comprise boron nitride and glass fiber. In various embodiments, the liquid crystal polymer is selected from the group consisting of semi-aromatic copolyesters, copolyamides, polyester-co-amides, and mixtures thereof.

Abstract: Fire protection materials comprising an endothermic hydrate, an intumescent, a heat resistant fiber and an elastomeric polymer. In various embodiments, endothermic hydrate comprises aluminum trihydrate, the intumescent comprises expandable graphite, and the heat resistant fiber comprises poly(p-phenylene terephthalamide). The elastomeric polymer may be a polyorganosiloxane, such as a phenyl substituted polydimethyl siloxane. Also described are structures comprising such fire protection materials, e.g., separators and other battery containment structures such as for use with high density lithium batteries.

Abstract: A gasket includes a plurality of compression limiters each including a plastic body having a fastener aperture extending there through and a plurality of flow holes extending there through. An elastomeric body defines a perimeter sealing body molded around the plurality of compression limiters at spaced locations around the perimeter sealing body. The elastomeric body extends through the plurality of flow holes in the plurality of compression limiters.

Abstract: Thermally conductive electrically insulating compositions and structures and devices comprising such materials. In various embodiments, such materials comprise liquid crystal polymer and fillers, wherein the fillers comprise boron nitride and glass fiber. In various embodiments, the liquid crystal polymer is selected from the group consisting of semi-aromatic copolyesters, copolyamides, polyester-co-amides, and mixtures thereof.

Abstract: A compressor may include a housing, a piston, a valve plate, a discharge valve and a head cover. The housing defines a cylinder. The piston is disposed within the housing and is movable within the cylinder. The valve plate is mounted to the housing and may include a discharge passage extending through the valve plate and defined by a discharge valve seat. The discharge valve is movable between a first position in which the discharge valve is seated on the discharge valve seat to restrict fluid flow through the discharge passage and a second position in which the discharge valve is spaced apart from the discharge valve seat to allow fluid flow through the discharge passage. The head cover may include a guide post including a pocket that receives a valve stem of the discharge valve.

Abstract: A compressor may include a housing, a piston, a valve plate, a discharge valve and a head cover. The housing defines a cylinder. The piston is disposed within the housing and is movable within the cylinder. The valve plate is mounted to the housing and may include a discharge passage extending through the valve plate and defined by a discharge valve seat. The discharge valve is movable between a first position in which the discharge valve is seated on the discharge valve seat to restrict fluid flow through the discharge passage and a second position in which the discharge valve is spaced apart from the discharge valve seat to allow fluid flow through the discharge passage. The head cover may include a guide post including a pocket that receives a valve stem of the discharge valve.

Abstract: A compressor may include a housing, a piston, and a cylinder head assembly. The housing defines a cylinder and a first valve seat defining a recess. The piston is movable within the cylinder to define a compression chamber. The cylinder head assembly is mounted on the housing and includes a valve plate, a suction valve, a discharge valve and a head cover. The valve plate may be mounted to the mounting surface and may include a suction plenum, a suction passage providing fluid communication between the suction plenum and the cylinder, and a discharge passage. The suction valve can seat on the first valve seat to allow fluid flow through the suction passage. The head cover may include a discharge chamber and an integrally formed guide post extending into the discharge chamber. The guide post may include a pocket that receives a discharge valve stem for reciprocation therein.

Abstract: A compressor may include a compression cylinder, a compression piston, a crankshaft, an injection bore, a position sensor, and a valve assembly. The compression piston is disposed within the compression cylinder and is operable to compress a vapor disposed within the compression cylinder from a suction pressure to a discharge pressure. The crankshaft is operable to cycle the compression piston within the compression cylinder. The injection bore may be in fluid communication with the compression cylinder and may be operable to selectively communicate intermediate-pressure vapor at a pressure between the suction pressure and said discharge pressure to the compression cylinder. The position sensor may measure a rotational position of the crankshaft. The valve assembly may be associated with the injection bore. The valve assembly may be operable to control passage of fluid from the injection bore into the compression cylinder in response to data provided by the position sensor.

Abstract: Methods, devices, and systems for monitoring heart rate variability (HRV) are presented. The HRV monitoring systems and devices are adapted to give immediate feedback to the subject concerning their current condition and any pertinent changes in their condition. The HRV monitoring systems and devices detect, analyze, and assess HRV against a pre-determined application, user needs, against pre-determined limits, or user specific baselines or a combination of both pre-determined limits and user specific baselines. They also have the ability to provide real time notifications based on the system's assessment of a user's heart rate, HRV and changes in the HRV.

Abstract: Methods, devices, and systems for monitoring heart rate variability (HRV) are presented. The HRV monitoring systems and devices are adapted to give immediate feedback to the subject concerning their current condition and any pertinent changes in their condition. The HRV monitoring systems and devices detect, analyze, and assess HRV against a pre-determined application or user need. They also have the ability to provide real time notifications based on the system's assessment of a user's heart HRV and changes in the HRV.

Abstract: A protective collapsible shield is provided. The protective collapsible shield may include a first panel, a second panel and a third panel. The first and second panels each have a rectangular protrusion or lip extending from a bottom edge. The third panel includes slots for housing the first panel and the second panel. The third panel further includes snapping straps for securing the first and second panels in the slots when the protective collapsible shield is in a retracted state. The third panel further includes multiple locking mechanisms. Each of the locking mechanisms includes a cylindrical rod, a handle fastened to the cylindrical rod and a housing for receiving the cylindrical rod. The locking mechanisms engage with the first and second rectangular protrusions to secure the first and second panels in the slots when the protective collapsible shield is in an extended state.

Abstract: Methods, devices, and systems for monitoring heart rate variability (HRV). The HRV monitoring systems and devices are adapted to give immediate feedback to the subject concerning their current condition and any pertinent changes in their condition. The HRV monitoring systems and devices detect, analyze, and assess HRV against a pre-determined application or user need. They also have the ability to provide real time notifications based on the system's assessment of a user's heart HRV and changes in the HRV.

Abstract: A compressor may include a housing, a piston, and a cylinder head assembly. The housing defines a cylinder and a first valve seat defining a recess. The piston is movable within the cylinder to define a compression chamber. The cylinder head assembly is mounted on the housing and includes a valve plate, a suction valve, a discharge valve and a head cover. The valve plate may be mounted to the mounting surface and may include a suction plenum, a suction passage providing fluid communication between the suction plenum and the cylinder, and a discharge passage. The suction valve can seat on the first valve seat to allow fluid flow through the suction passage. The head cover may include a discharge chamber and an integrally formed guide post extending into the discharge chamber. The guide post may include a pocket that receives a discharge valve stem for reciprocation therein.

Abstract: Methods, devices, and systems for monitoring heart rate variability (HRV). The HRV monitoring systems and devices are adapted to give immediate feedback to the subject concerning their current condition and any pertinent changes in their condition. The HRV monitoring systems and devices detect, analyze, and assess HRV against a pre-determined application or user need. They also have the ability to provide real time notifications based on the system's assessment of a user's heart HRV and changes in the HRV.

Abstract: A protective collapsible shield is provided. The protective collapsible shield may include a first panel, a second panel and a third panel. The first and second panels each have a rectangular protrusion or lip extending from a bottom edge. The third panel includes slots for housing the first panel and the second panel. The third panel further includes snapping straps for securing the first and second panels in the slots when the protective collapsible shield is in a retracted state. The third panel further includes multiple locking mechanisms. Each of the locking mechanisms includes a cylindrical rod, a handle fastened to the cylindrical rod and a housing for receiving the cylindrical rod. The locking mechanisms engage with the first and second rectangular protrusions to secure the first and second panels in the slots when the protective collapsible shield is in an extended state.

Abstract: A technique for cache coherency is provided. A cache controller selects a first set from multiple sets in a congruence class based on a cache miss for a first transaction, and places a lock on the entire congruence class in which the lock prevents other transactions from accessing the congruence class. The cache controller designates in a cache directory the first set with a marked bit indicating that the first transaction is working on the first set, and the marked bit for the first set prevents the other transactions from accessing the first set within the congruence class. The cache controller removes the lock on the congruence class based on the marked bit being designated for the first set, and resets the marked bit for the first set to an unmarked bit based on the first transaction completing work on the first set in the congruence class.