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 booster unit supplies additional force for relieving the operator of supplying the entire force for key drive apparatus.
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
Electromechanical Booster for Key Drive Apparatus
This booster unit supplies additional force for relieving the operator of
supplying the entire force for key drive apparatus.
In braille embossing apparatus, the initial portion of key
travel sets up bails to create dot patterns. The force requirements
are low during this portion of the key stroke. The major force is
required during the later portion of the key stroke when the die is
pressed down over the dot forming pins or bosses to emboss the paper.
Most braille cells consist of three dots with a maximum of six.
Approximately 12 ounces of force are required per dot.
This device senses the initial actuation of any key, and then quickly energizes
an electromechanical device to provide the greater force for the embossing.
In operation, the spacing control bail 1 is forced down by any key 2 being
depressed. The anvil 3 is forced down by the linkage 4 and key leverage bar to
emboss. The sensor 5 actuates an electromechanical devices, such as a
solenoid or magnet, to pull down on the linkage 4, thus reducing operator force
requirements. Extended base pads 7 provide clearance for the solenoids and
Page 2 of 2
[This page contains 2 pictures or other non-text objects]