Abstract: Methods, apparatus, and systems for an airflow system, wherein the positive applied pressure is maintained at an approximately constant level over a variety of conditions. In one embodiment, a laminar flow is maintained by a foam housing and configuration. The use low air volume is enabled by using a closed system, wherein feedback information from the system is used to control the speed of an impeller. In one embodiment, moisture recirculation and recycling is applied to extract moisture from exhalation and inject the moisture back into the inhalation portion of the breathing cycle.

Abstract: A cooking vessel bracket and handle provides a first handle portion and a second handle portion each having opposing end portions, parallel spaced apart sides and a back defining a channel between the ends. First handle has handle flanges at first end portion and locking seat at second end portion. Second end portion of first handle and first end portion of second handle are pivotally interconnected for first handle to optionally fold into channel of second handle. Spring biased locking pin within channel of first handle protrudes from first handle between the handle flanges for releasable engagement with pot bracket carried by vessel and operatively communicates with a thumb slide for axial movement in channel. Spring biased handle lock in second handle channel releasably engages with locking seat of first handle to secure the first handle and second handle in extended end to end alignment for use.

Abstract: A cooking vessel bracket and handle provides a first handle portion and a second handle portion each having opposing end portions, parallel spaced apart sides and a back defining a channel between the ends. First handle has handle flanges at first end portion and locking seat at second end portion. Second end portion of first handle and first end portion of second handle are pivotally interconnected for first handle to optionally fold into channel of second handle. Spring biased locking pin within channel of first handle protrudes from first handle between the handle flanges for releasable engagement with pot bracket carried by vessel and operatively communicates with a thumb slide for axial movement in channel. Spring biased handle lock in second handle channel releasably engages with locking seat of first handle to secure the first handle and second handle in extended end to end alignment for use.

Abstract: Computer keyboard systems and methods of determining excessive keystroke force or overpressure are described. A computer keyboard system 10 is illustrated having a keyboard array of keys 14. Individual keys 14 are capable of being reciprocated through a keystroke range which comprises an undepressed position and an actuation position. The keystroke range may also include an overtravel subrange. Individual keys 14 are operatively connected with individual keyswitches 32 which are activated thereby for providing informational signals to a keyboard microprocessor 54, 56. The microprocessor is configured to determine a keyswitch closure duration value and compare that value with a predetermined threshold duration value. If the closure duration value is greater than the predetermined threshold duration value, then an overpressure signal is produced which enables a sensory warning device 50, 52 to warn the keyboard operator that excessive force has been applied.

Abstract: A computer keyboard 10 has a plurality of keys 24 with each key 24 having a membrane keyswitch 30. Each keyswitch 30 has a lower membrane layer 32 with a printed circuit having switch contacts 42 printed on an upper side thereon within a switch contact area. An upper membrane layer 36 is provided having a printed circuit thereon with switch contacts 46 printed on a lower side thereon within the switch contact area and in actuation alignment with switch contacts 42. Dielectric pads 50 are printed over parts of the switch contact area forming dielectric mounds between switch contact segments. Stress concentration pads 54 are printed on the upper side of the upper layer 36 spaced intermediate the dielectric pads 54 for causing the upper layer 36 to deflect between the dielectric pads 50 to bring portions of the switch contacts 46 into contact with the switch contacts 42.