Pressure transducer

• US 4,512,357 A
• Filed: 01/12/1983
• Issued: 04/23/1985
• Est. Priority Date: 01/12/1983
• Status: Expired due to Fees

• Current Assignee: Fairchild Industries, Inc. (ON Semiconductor Corporation)
• Original Assignee: Fairchild Industries, Inc. (ON Semiconductor Corporation)
• Inventors: Earl, Webster B.
• Primary Examiner(s): Cohan, Alan
• Application Number:
  US06/457,461
• Time in Patent Office: 832 Days
• Field of Search: 137/82, 137/85, 251/129, 251/337
• US Class Current: 137/82
• CPC Class Codes: F15B 5/003 characterised by variation of the pressure in a nozzle or the like, e.g. nozzle-flapper system
• CPC Class Codes: Y10T 137/2278 Pressure modulating relays or followers

Abstract

An electric to pneumatic transducer that utilizes an electrical coil and a magnet assemble that is suspended by a plurality of springs. The magnet assembly acts upon a nozzle assembly in such a manner that movement of the magnet assembly causes a change in the release of pneumatic fluid from the nozzle assembly. The movement of the magnet assembly is accomplished by increasing or decreasing the electrical current that passes through the electrical coil with a corresponding increase in pressure or decrease in pressure exerted by the magnet assembly upon the nozzle assembly. The unique configuration of the springs also allows free up and downward vertical movement of the magnetic assembly and restricts or prevents sideward movement of the magnet assembly.

Claims

1. An electric to pneumatic transducer comprising a housing, nozzle means for releasing air or a gas or gases located in said housing, inlet means for transmitting air or a gas or gases to said nozzle means, magnetic means acting upon said nozzle means for varying the amount of air or a gas or gases released from said nozzle means and electrical activating means operatively associated with said means for acting upon said nozzle means for controlling said magnetic means for acting upon said nozzle means in accordance with an electrical signal, said magnetic means for acting upon said nozzle means including means for limiting lateral movement thereof and for permitting reciprocal movement thereof comprising spring means, said spring means comprising a plurality of substantially M-shaped leaf springs.

2. The electric to pneumatic transducer of claim 1 wherein said plurality of substantially M-shaped leaf springs are substantially identical.

3. The electric to pneumatic transducer of claim 1 further comprising means associated with said nozzle means for permitting ready access to said nozzle means.

4. The electric to pneumatic transducer of claim 3 wherein said nozzle means comprises a nozzle member said housing has an aperture for receiving at least a portion of said nozzle member and wherein said means for permitting ready access to said nozzle member comprises a connecting member engaging said housing and a portion of said nozzle member.

5. The electric to pneumatic transducer of claim 4 wherein said connecting member is removable from said housing.

6. The electric to pneumatic transducer of claim 5 wherein said connecting member comprises a screw locatable in a hole in said housing.

7. The electric to pneumatic transducer of claim 1 futher comprising means associated with said nozzle means for compensating for different dimensional tolerances.

8. The electric to pneumatic transducer of claim 7 wherein said means for compensating for different dimensional tolerances comprises at least one shim.

9. The electric to pneumatic transducer of claim 8 wherein said means for compensating for different dimensional tolerances comprises a plurality of shims.

10. The electric to pneumatic transducer of claim 9 wherein said plurality of shims are color coded.