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 arrangement permits a keyboard to display alternative languages or type styles based on the changeable print element which is chosen by the user.
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.
This is the abbreviated version, containing approximately
57% of the total text.
Page 1 of 3
Changeable Character Display Keyboard
This arrangement permits a keyboard to display alternative languages or
type styles based on the changeable print element which is chosen by the user.
In changeable element printers, such as typewriters, the character generated
by a given key is a function of the particular element installed at that time. Since
any given key can produce different print characters when different print
elements are in use, it is desirable to provide a keyboard display which changes
as the print element is changed. In this way the display adjacent each key is a
true representation of the character which will be generated by the print element
then in use.
In Fig. 1, a ball type element 10 includes a coded mounting boss 11. When
the element is mounted in operating position, boss 11 displaces indicator shaft
12 so as to generate a voltage by way of linear potentiometer 13. This voltage
provides a signal to microprocessor 14, which causes the microprocessor to
generate keyboard display signals in accordance with the particular element 10.
The element characters are visually displayed, at optical fiber interface panel 15,
and are transmitted to keyboard display element 16 by fiber-optic bundle 17. A
translucent keyboard facia 18 covers elements 16. Pressing key 19 generates
the character displayed on its lower adjacent display element.
Fig. 2 shows a manual arrangement wherein a logic chip 20, changeable with
the type containing element and containin...