Abstract: A method and system for arbitrating access to a shared disk controller resource, including a buffer memory of a hard disk controller (HDC). An access cycle with a first cycle duration are disclosed and a first amount of time is allocated to a first accessing unit including an error correction code (ECC) engine, a microprocessor first-in-first-out (FIFO) unit, or a memory refresh/data format data fetch unit. The shared controller resource is accessed using the first accessing unit for a first duration, where the first duration is no greater than the first amount of time. A second amount of time and an unused portion of the first amount of time is allocated to a second accessing unit such as a disk formatter. Arbitration limit registers may be used to specify the number of HDC clock cycles per access cycle available to an accessing unit during which it can access the buffer memory. A global arbitration limit counter may be used to keep track of the duration of the accessing units.

Abstract: An improved single actuation casement and awning window securing mechanism comprising two cams and a linking arm held in tension upon closing. The cams operate in unison in a clamshell fashion, such that closing and opening of the single actuation sash lock is accomplished in an easy and secure manner.

Abstract: The prevent invention provides an apparatus 100 of a type on which a person exercises. The apparatus 100 includes a support frame 101 and a chair member 102 that is rotatably mounted to the support frame 101. A rotational resistance means 105 is also mounted to the support frame 101. The rotational resistance means 105 includes conical surfaces 255 and 256 that provide frictional resistance through interengagement between one of thirty-two teeth 257 on shaft member 154 and one of three ratcheting members 258a-c on rotatable friction member 155. A rotational arm means 106 is operatively connected to the rotational resistance means 105 to allow application of a rotational force in a given direction of rotation against the rotational resistance means 105. A foot anchor means 103 is mounted to the support frame 101, so that a person seated in the chair member 102 may anchor his feet beneath the foot anchor means 103 in order to perform abdominal flexions.

Abstract: A multiple exercise unit capable of providing a user with a wide range of strength and conditioning exercises. The exercise unit provides resistance through an isokinetic device which utilizes a clutch mechanism. Lines extend out of the isokinetic device and attach to various exercise elements such that a variety of upper and lower body strength exercises may be performed.

Abstract: A shielded housing for a computer or the like including top and bottom housing parts. The top housing part includes a top wall and two side walls. The bottom housing part includes bottom, front and back walls. An inverted V-shaped channel is carried by the side walls adjacent the lower edges for a cooperating fit between the channels and upturned flanges carried by the bottom wall planar surface. The inner surfaces of the housing parts include shielding for reduction of electrostatic noise from the enclosure. The cooperating fit between the channels and bottom wall flanges provide and improved side wall junction to prevent electrostatic noise from leaking along the side wall edges.

Abstract: A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.

Abstract: A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.