Measuring and testing – Fluid pressure gauge – With excess or maximum registering
Reexamination Certificate
1999-07-28
2001-11-20
Oen, William (Department: 2855)
Measuring and testing
Fluid pressure gauge
With excess or maximum registering
Reexamination Certificate
active
06318181
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a multi-channel pressure sensor controller for performing centralized processing of a measured value from each of a plurality of pressure sensors and for displaying and transmitting the results of processing.
2. Description of the Related Art
According to a conventional method for processing measured values to provide digital indication of measured values from a plurality of pressure sensors, pressure sensor controllers for processing measured values from pressure sensors are provided in a one-to-one correspondence with the respective pressure sensors; thresholds are set in the pressure sensor controllers; the pressure sensor controllers compare measured values with the thresholds; the measured values are digitized and are displayed on a display; and the indication is provided based on the results of the comparison.
However, the above-described method for processing measured values has a problem in that a large space is required for pressure sensor controllers when measured values from a plurality of pressure sensors are to be processed because they are provided in one-to-one correspondence with pressure sensors and further in that the pressure sensor controllers result in an increased cost.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a multi-channel pressure sensor controller to be commonly used for a plurality of pressure controllers.
According to the invention, measured pressure signals output by a plurality of pressure sensors and channel numbers assigned to the pressure sensors are processed by a single multi-channel pressure sensor controller; each of the channel numbers is displayed based on a selection signal along with a measured pressure value provided by the pressure sensor associated with the channel number; the measured pressure value of the pressure sensor associated with the channel number is compared with a pre-stored threshold associated with the channel number; and an indication based on the output of the comparison is displayed with an alarm indicator lamp having the corresponding channel number.
The above and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings in which a preferred embodiment of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 4116050 (1978-09-01), Tanahashi et al.
patent: 4704609 (1987-11-01), Rittenberry et al.
patent: 4881071 (1989-11-01), Monterosso et al.
patent: 5617338 (1997-04-01), Sugano et al.
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patent: 40 23 649 A1 (1991-02-01), None
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patent: 2229327 A (1975-01-01), None
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NOTE: For foreign patent documents, partial translations, by way of abstracts, are provided. British Patent Office Search Report also attached.
* English language abstracts of each of the above documents are attached.
“Sensor Circuit Design Manual,” p. 20 (futher bibliographic information unknown), (No Date).
“Automation Process,” p. 307 (futher bibliographic information unknown), (No Date).
Office Action from Taiwan Patent Office, with abridged translation thereof, (No Date).
Note: Copy of Office Action from German Patent Office (without translation) is attached, (No Date).
Okuyama Tomoyuki
Shimomoto Yutaka
Guss Paul A.
Oen William
SMC Kabushiki Kaisha
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