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.
Improved definition of eroded spots is achieved by decreasing the marking current after the initial arc has been struck.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
100% of the total text.
Page 1 of 2
Arcing Current Control
Improved definition of eroded spots is achieved by decreasing the marking
current after the initial arc has been struck.
Referring to Fig. 1, metallized paper 1 is marked by eroding the metal coating
2 beneath electrode 3. Marking is initiated by turning on transistor 4 with an input
pulse at its base. This action forward biases transistor 5 so that current flows
from ground electrode 6 through the metal coating 2, recording the electrode 3,
transistor 5, resistor 7 and transistor 4. After the initial arc occurs between
electrode 3 and the metal coating, that junction increases in resistance so that
transistor 5 becomes back-biased, forcing current through resistor 8. This
decreases the electrode current during the remainder of the marking pulse.
Figs. 2a and 2b illustrate the current and voltage waveforms for the initial arc
and the discharge portions of the marking pulse.
Page 2 of 2
[This page contains 3 pictures or other non-text objects]