The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1977
Filed:
Jun. 13, 1975
Donald S Rich, Flanders, NJ (US);
Inflo Systems, Inc., Chester, NJ (US);
Abstract
Disclosed is a switch. The switch housing has a cavity therein. In one embodiment a plunger has selected portions cut away so as to form, in combination with the side walls of the cavity, two contiguous chambers. Thus, the first chamber communicates with the second chamber. Mercury is placed in the larger chamber and remains there, irrespective of the position of the switch housing. Upon depression of the plunger, the mercury is forced into the smaller chamber. Upon removal of the plunger, the displaced mercury returns to the larger chamber. Electrical contacts are disposed in the two chambers. The mercury, displaced by the plunger, will couple the contacts and close the switch. It, upon operation of the switch at high frequencies, mercury is pumped out of the chambers and passes above the plunger and within the cavity, a channel of smaller dimension than either chamber, which extends the length of the plunger, acts to direct such mercury back to the first chamber. A small amount of mercury is disposed between the top of the plunger and the cavity to prime the return of mercury.