Browse Prior Art Database

Programmable Lock/Unlock of Typewriter Functions

IP.com Disclosure Number: IPCOM000101067D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 134K

Publishing Venue

IBM

Related People

Kosieniak, AL: AUTHOR [+3]

Abstract

It would be very desirable for certain typewriter features and functions, such as spell verification and document storage, to be disabled for certain users of the equipment. For instance, in the education environment, a teacher could be assured during typing tests that the spelling feature was not being utilized; or in an office, certain areas of document storage could be edited only by certain individuals.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 45% of the total text.

Programmable Lock/Unlock of Typewriter Functions

       It would be very desirable for certain typewriter
features and functions, such as spell verification and document
storage, to be disabled for certain users of the equipment. For
instance, in the education environment, a teacher could be assured
during typing tests that the spelling feature was not being utilized;
or in an office, certain areas of document storage could be edited
only by certain individuals.

      By utilizing the non-volatile storage within a typewriter, it
is possible to store a programmable lock/unlock key sequence that
will allow only users who know the sequence access to the machine
functions.

      This invention will allocate four bytes of non-volatile memory
for each system function that needs to be protected/disabled.  These
four bytes will be used to represent a four byte number and will be
initialized to zero the first time the machine is turned on.  The
following functions have been identified as areas where locking is
desirable:
           Spelling Verification/Assist Feature
                (Education Environment)
           Writing Style Analysis Feature
                (Education Environment)
           Document Storage
                (To secure portions of the machine's data
                either by individual document or by storage
                sections - such as subdirectories on products
                like the Model 50 and 70 typewriters)

      TYPEWRITER FUNCTION LOCK/UNLOCK
(Products with displays and document storage)
Create the following Coded Key Sequences:
1.   Code+P is the function used to define and change the password
for typewriter features and functions.  When Code+P is pressed, a
menu (or list, depending upon the display technology of the
typewriter) of functions that can be protected is presented.  The
user selects any or all of the functions on the list and will be
prompted to enter and confirm a new four-digit number (password) for
each function selected.  If a password currently exists for the
function, the operator is prompted to enter the old password before
the new sequence is activated.  The four-digit number will be stored
in non-volatile RAM and instructs the machine that this is the
four-digit number required as a password for the indicated function.
2.   Code+Shift key is used to activate/deactivate the desired
machine function.  When the key is pressed, the menu (or list) of
typewriter functions is presented along with the current state
(locked or unlocked).  The operator can change the state by selecting
a function from the menu.  The typewriter will then prompt the
operator for the password for the function.  If keyed correctly, the
lock state is toggled; if not, it remains unchanged.
3.   Function Activation:  If a function (i.e., spelling
verification) is activ...