|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||200/834 ; 73/717 ; 200/83N ; 340/605|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 14 인용 특허 : 0|
Two electrically conductive diaphragms which are disposed in generally parallel relation and are symmetrical mirror images of each other are joined to a non-conductive ring. The diaphragms are joined in a pressurized atmosphere of argon at, for example, 3000 psi. When so pressurized internally and with lower external pressure, the diaphragms do not contact each other. When pressurized externally to a pressure to a predetermined level higher than the internal pressure, the diaphragms make contact with each other to close an electric circuit. If pressure l...
A pressure differential switch comprising: first and second diaphragms, each of which has a raised surface and contacting portion, at least, which is electrically conducting, an electrically non-conductive spacer ring having a first side and a second side, and attaching means attaching said first diaphragm and said second diaphragm in sealing relation to said first and second sides, respectively, of said spacer ring thereby forming an hermetically sealed chamber therebetween with said contacting portions thereof in directly opposed relation, wherein said...