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.
This article describes a system for locating a lamp filament relative to an ellipsoidal reflector.
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
Illumination Lamp Location Device
This article describes a system for locating a lamp filament relative to an
A lamp filament 10 is located along the focal line of ellipsoidal reflector 11 by
adjusting the position of the filament. This is accomplished by viewing the
filament on a poly-coat glass 12 which has scribe lines thereon (not shown) to
define an envelope to which the imaged filament is adjusted. The image of
filament 10 is produced by mirrors 13 and 14 and lenses 15-18.
Page 2 of 2
[This page contains 2 pictures or other non-text objects]