The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
A solder fountain level gage uses electrically conductive probes contacting electrically conductive solder to indicate the level of solder in a solder fountain.
English (United States)
This text was extracted from a PDF file.
100% of the total text.
Page 1 of 1
Solder Fountain Level Gage
A solder fountain level gage uses electrically conductive probes contacting
electrically conductive solder to indicate the level of solder in a solder fountain.
As indicated in the Figure, a gage 10 is positioned in a solder fountain 12 to
measure the level of solder indicated by a line 14. The gage 10 has a power
supply 16 such as a battery having a positive side connected to a plurality of
loads 18 and neon bulb indicators 20. The negative side of the battery 16 is
electrically coupled to a pair of conductive side rails 22 and 24 which support the
gage 10 in the base of the solder fountain 12 and electrically contact the solder.
A number of probes 26, 28, 30, 32, and 34 are coupled electrically to the
indicators 20 and adjustably supported by a nonconductive rail 36 which in turn is
supported by side rails 22 and 24. The probes are of different chosen lengths so
that when they contact the solder, an electrical circuit is closed causing the
indicators to light up. In the Figure, the indicators coupled to probes 32 and 34
will be lighted.
Adjustability of the probes is provided by set screws 38, 40, 42, 44 and 46
which are threaded into rail 36 and have heads contacting the probes to secure
them in place. Probe 26 is adjusted to a height to indicate an overflow condition
which may cause damage to the solder fountain.