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The Fredericks Company Patents
Assignee:
The Fredericks Company
Address:
Huntingdon Valley, PA
No. of patents:
8
Patents:




Patent Number Title Of Patent Date Issued
6688013 Electrolytic-tilt-sensor February 10, 2004
An electrolytic tilt sensor is disclosed which comprises a containment envelope having a metallic container and a header, the envelope defining a chamber and having at least one pair of apertures, an electrolytic solution partially filling the chamber, and at least one pair of electr
6453571 Thermocouple tilt sensing device September 24, 2002
A thermocouple tilt sensing device comprises a container being substantially gas-tight, a first sensing wire having a first and a second end, and a second sensing wire, having a first and a second end. The first end of the first sensing element is electrically connected to the first
6257069 Bayard-alpert vacuum gauge with neutralization of x-ray effect July 10, 2001
A Bayard-Alpert gas pressure measuring gauge with x-ray effect neutralization comprising collector and shield electrodes that comprise the same substantially inert electrically conductive substances. Said inert substance may be gold or another substance from the group consisting of p
6249984 Electrolytic tilt sensor having a metallic envelope June 26, 2001
An electrolytic tilt sensor and a method of assembling the tilt sensor. The tilt sensor includes a metallic envelope comprising a metal container and a metal header welded to the enclosure, hermetically sealing the envelope. The envelope defines a chamber that contains an electrolytic so
5852878 Electrolytic tilt sensing device December 29, 1998
An electrolytic toroidal tilt sensing device for electrical coupling to a measuring circuit, wherein the measuring circuit is responsive to the device and adapted to provide an output signal indicative of the tilting and direction of tilting associated with the device, includes: an e
5630280 Dual axis electrolytic tilt sensor May 20, 1997
A dual axis electrolytic tilt sensor is disclosed which includes a spherical enclosure that houses a plurality of electrodes partially immersed in an electrolytic solution. The electrodes have arcuate contact portions and the spherical inner surface of the enclosure defines a common
5568053 Ionization gauge having a non-time varying magnetic field generator of separated opposed magnets October 22, 1996
A cold cathode ionization gauge includes a first and second electrode spaced apart and insulated from one another and having a common axis. A magnetic field generator surrounds the gauge and applies a non-time varying magnetic field along the common axis of the electrodes. The magnet
5351551 Convection thermocouple vacuum gauge October 4, 1994
A thermocouple vacuum gauge includes a first thermocouple element spaced below a second thermocouple element. The two thermocouple elements are electrically connected in series in a back-to-back manner by connecting together their respective negative ends. A pulse generator supplies a

 
 
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