VALVE OPERATION DETECTING DEVICE

• US 3,859,619 A
• Filed: 06/20/1973
• Issued: 01/07/1975
• Est. Priority Date: 07/11/1972
• Status: Expired due to Term

• Current Assignee: Hiroaki Nishimura, Kiyohiko Mizuno, Shinya Ishihara
• Original Assignee: Hiroaki Nishimura, Kiyohiko Mizuno, Shinya Ishihara
• Inventors: Mizuno, Kiyohiko, Ishihara, Shinya, Nishimura, Hiroaki
• Primary Examiner(s): Caldwell, John W.
• Assistant Examiner(s): Myer, Daniel
• Application Number:
  US05/371,881
• Time in Patent Office: 566 Days
• Field of Search: 340/238,282,200 200/DIG.1,83L,83Q 137/554
• US Class Current: 137/554
• CPC Class Codes: F16K 37/0033 using a permanent magnet, e.g. in combination with a reed relays
• CPC Class Codes: F16K 37/0041 for measuring valve parameters F16K37/0033 takes precedence
• CPC Class Codes: Y10T 137/8242 Electrical

Abstract

A valve operation detecting device having a sensing means, such as a reed switch, a differential transformer or a variable capacitor which operates in accordance with the movement of a valve body provided in the valve for detecting the opening and closing operation of the valve body to be able to recognize and confirm the valve body operation from the outside easily.

Claims

1. A valve operation detecting device for detecting the opening and closing operation of a valve wherein said valve includes:

a valve body, a movable diaphragm connected to said valve body, and a non-magnetic covering case enclosing said diaphragm, the detecting device comprising a reed switch removably mounted on said non-magnetic covering case, a permanent magnet movable with respect to said reed switch in accordance with the movement of said diaphragm, and indicating means connected to said reed switch for indicating the movement of said valve body in accordance with the opening and closing of said reed switch.

2. A valve operation detecting device for detecting the opening and closing operation of a valve body, a movable diaphragm connected to said valve body, and a non-magnetic covering case enclosing said diaphragm, the detecting device comprising:

a differential transformer having coils removably mounted on said non-magnetic covering case, a permanent magnet core movable with respect to said coils in accordance with the movement of said diaphragm, and indicating means connected to said coils for indicating the movement of said permanent magnet core with respect to said coils.