IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0939079
(2001-08-23)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Westman, Champlin & Kelly
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
107 |
초록
▼
A capacitor industrial process control transmitter includes a three-phase excitation circuit to charge a sensing capacitor and a compensation capacitor of the transmitter and transfer charges to an integrator. The sensing capacitor is charged during the first phase. During the second phase, the volt
A capacitor industrial process control transmitter includes a three-phase excitation circuit to charge a sensing capacitor and a compensation capacitor of the transmitter and transfer charges to an integrator. The sensing capacitor is charged during the first phase. During the second phase, the voltage to the sensing capacitor is reversed, and the charge on the sensing capacitor is pumped to the integrator. Also, the compensation capacitor is charged with the reversed voltage during the second phase. During the third phase, the voltage to the compensation capacitor is changed, and the charge on the compensation capacitor is pumped to the integrator.
대표청구항
▼
A capacitor industrial process control transmitter includes a three-phase excitation circuit to charge a sensing capacitor and a compensation capacitor of the transmitter and transfer charges to an integrator. The sensing capacitor is charged during the first phase. During the second phase, the volt
A capacitor industrial process control transmitter includes a three-phase excitation circuit to charge a sensing capacitor and a compensation capacitor of the transmitter and transfer charges to an integrator. The sensing capacitor is charged during the first phase. During the second phase, the voltage to the sensing capacitor is reversed, and the charge on the sensing capacitor is pumped to the integrator. Also, the compensation capacitor is charged with the reversed voltage during the second phase. During the third phase, the voltage to the compensation capacitor is changed, and the charge on the compensation capacitor is pumped to the integrator. suring Apparatus and Method Thereof. R. Roderick and R. Truell, "The Measurement of Ultrasonic Attenuation in Solids by the Pulse Technique and Some Results in Steel", Journal of Applied Physics, 23 (7) pp. 267-279. O.R. Gericke, "Ultrasonic Spectroscopy of Steel", Mater. Res. Stand., 5 (23), 1965. D. Ackers, C. Vaccaro, S. Elssworth and D. Petit, "The Effect of Porosity Density and Configuration in Composite Materials on the Ultrasonic Waveform", in Review of Progress in QNDE, vol. 15, Edited by D. Thompson and D.E. Chimenti, Plenum Press, New York, pp. 1239-1249 (1995). Pouet, B. , Rasolofosaon, N.J.P., "Ultrasonic Intrinsic Attenuation Measurement Using Laser Techniques", Ultrasonics Symposium, 1989, Proceedings, IEEE 1989, vol. 1, pp. 545-549 (1989). J.D. Aussel and J.P. Monchalin, "Measurement of Ultrasound Attenuation by Laser-Ultrasonics", Journal of Applied Physic, 65 (8) pp. 2918-2922 (1989). F.A. Reed, T.J., Batzinger, R.W. Reed and S. Jonsson, "Porosity Measurements in Composites Using Ultrasonice Attenuation Methods", in Review of Progress in QNDE, vol.12, Edited by D. Thompson and D.E. Chimenti, Plenum Press, New York, pp. 1265-1272 (1993). ed over an opening formed in a roof, the ridge vent comprising: an elongated panel having a first end and a second end and a pair of opposed sides; the panel having an upper surface and a lower surface, the lower surface being structured to face toward the roof; a plurality of first baffles depending from the lower surface of the panel, the first baffles being spaced from one another and arranged to form a pair of first rows adjacent the sides of the panel; a plurality of second baffles depending from the lower surface of the panel, the second baffles being spaced from one another and arranged to form a pair of second rows disposed adjacent the first rows, the second baffles alternating with and at least partially overlapping the first baffles along each side of the panel, the first and second baffles being spaced from one another to provide a plurality of drainage spaces between the first and second baffles, the second rows being disposed between the first rows; the first and second baffles each having an outwardly facing generally concave configuration; a plurality of third baffles depending from the lower surface of the panel, the third baffles being disposed between the pair of second rows; and wherein at least some of the third baffles have a generally cylindrical fastener-receiving hole. 22. The ridge vent of claim 21, wherein the upper surface includes a depression for receiving a head of a fastener. 23. A ridge vent structured to be mounted over an opening formed in a roof, the ridge vent comprising: an elongated panel having a first end and a second end and a pair of opposed sides; the panel having an upper surface and a lower surface, the lower surface being
※ AI-Helper는 부적절한 답변을 할 수 있습니다.