发明名称 |
Powder level monitor |
摘要 |
An apparatus for monitoring the level of finely powdered material within a hopper. A microphone disposed within the hopper monitors the environmental noise at a particular level within the hopper. Circuitry associated with the microphone is responsive to a marked change in the detected level of environmental noise for activating a powder level indicator when the level of powder in the hopper rises above or falls below the face of the microphone.
|
申请公布号 |
US3906475(A) |
申请公布日期 |
1975.09.16 |
申请号 |
US19740470411 |
申请日期 |
1974.05.16 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
RUBIN, JACOB C.;SWAPCEINSKI, JOHN P. |
分类号 |
G01F23/296;(IPC1-7):G08B21/00 |
主分类号 |
G01F23/296 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|