U.S. patent number 3,633,724 [Application Number 05/005,064] was granted by the patent office on 1972-01-11 for electric typewriter key and keyboard arrangement.
Invention is credited to Ronald A. Samuel.
United States Patent |
3,633,724 |
Samuel |
January 11, 1972 |
ELECTRIC TYPEWRITER KEY AND KEYBOARD ARRANGEMENT
Abstract
A keyboard arrangement for use with a standard electric
typewriter in which the conventional complement of standard keys
are replaced by eight polygonal-shaped key members, each of the
eight key members being operable to actuate five adjacent levers of
the typewriter. Each of the eight key members is movable both
axially and pivotally on the arcuate edges of a respective
four-sided key support member to selectively depress one of five
upstanding, symmetrically arranged key lever actuating posts
positioned at the center and each corner, of the respective key
member. Indicia on the face of each key member at each corner and
the center thereof designate which key lever will be actuated upon
depressing or pivoting the key member. BACKGROUND OF THE INVENTION
1 Field of the Invention This invention relates generally to
typewriter keys and keyboards and more particularly relates to a
novel typewriter key and keyboard construction adapted for use with
conventional electric or standard typewriters. 2 Description of the
Prior Act Standard typewriter keyboards consist of 40 or more keys
arranged in four rows on the face of the typewriter housing.
Operation of such standard typewriters usually is taught by
instructing the typist to position the fingers of each hand above
certain of the keys of the penultimate row on the keyboard, with
each of the eight fingers of the typist's hands being positioned
above one of eight keys. The typist has reduced to memory the
positions of each respective key on the standard keyboard and,
through practice and development of typing skills, will be able to
move his fingers to the desired keys in any of the four rows,
always returning his hands to "home " position above the
penultimate row after finishing depression of the desired key.
Standard typewriter keyboards require that each finger of the
typist's hands be responsible for the depression of four to eight
keys located in each of the four rows. The distance a particular
finger must move to his the desired key away from the "home"
position is, in some cases, substantial and if the typist is not
highly skilled, misprints, jamming and other errors can occur. It
is not uncommon for even the most skilled typist to have to look
away from the copy which is being duplicated on the typewriter and
make sure that finger position is proper before proceeding in the
typing operation. Despite the drawbacks and inadequacies of
standard typewriter keyboards, such keyboards are in wide use
because no satisfactory means of changing the arrangement thereof
without substantially altering the working components of the
typewriter itself have been developed. Additionally, even though
standard keyboards comprise a multiplicity of keys necessitating
undesirable varied and extreme movement of a typist's hands in
operation thereof, such keyboards are in universal use because any
substantial change in the key arrangement would require completely
revised teaching methods both for novice and experienced typists.
SUMMARY OF THE INVENTION The invention is characterized by a
plurality of substantially rectangular-shaped key members, each of
which is positioned and retained on a respective key support member
of approximately the same peripheral dimensions as the key member.
Each key support member comprises four upstanding wall portions,
each wall portion having an arcuate upper edge in face-to-face
relationship with the bottom surface of its respective key member.
Each key support member is disposed proximate five adjacent key
levers of an electric typewriter, each key lever being provided
with an upstanding key-lever-actuating post positioned at each
corner, and the center of the key support member. The arrangement
is such that each of the key members is pivotal on the arcuate
upper edges of respective key support members to selectively
depress one of the five upstanding, symmetrically arranged
key-lever-actuating posts to actuate a desired type bar upon
depressing or pivoting the proper key member above its respective
key support member. The primary object of the invention is to
provide an electric typewriter keyboard having eight key members
which are operable to actuate the forty type bars of a standard
electric typewriter, thereby eliminating the undesirable need for a
plurality of key members which necessitate vertical and diagonal
movement of a typist's hands in the typewriting operation. Another
object of the invention is to provide such a typewriter keyboard
which is adaptable for use with any standard typewriter without
changing any of the operational components thereof except for said
key members. A still further object of the invention is to provide
such a typewriter keyboard, the operation of which is easily taught
to a typist using basic and established teaching methods with
little variation therefrom.
Inventors: |
Samuel; Ronald A. (Chicago,
IL) |
Family
ID: |
21713976 |
Appl.
No.: |
05/005,064 |
Filed: |
January 22, 1970 |
Current U.S.
Class: |
400/485;
D18/1 |
Current CPC
Class: |
B41J
5/16 (20130101); B41J 5/28 (20130101) |
Current International
Class: |
B41J
5/28 (20060101); B41J 5/00 (20060101); B41J
5/16 (20060101); B41j 005/16 () |
Field of
Search: |
;41J/510
;197/98-104,7,9,11 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pulfrey; Robert E.
Assistant Examiner: Pellegrino; Stephen C.
Claims
What it is desired to secure by Letters Patent and what is claimed
is:
1. A keyboard for an electrical typewriter including a plurality of
key levers for actuating a like number of type bars having
characters of indicia on the faces thereof, said keyboard
comprising, a plurality of substantially polygonal-shaped key
support members overlying said key levers, each key support member
being positioned next adjacent another in lineal orientation one
with each other each key support member overlying one set
respectively of five adjacent key levers, each key lever having an
upstanding key-lever-actuating post affixed thereto, each set of
key levers including five actuating posts, four of said posts being
disposed respectively adjacent each corner of each said support
member and a fifth post disposed proximate the center of each said
support member, a plurality of key members corresponding in number
to said key support members, means to movably retain said key
members above each respective key support member in contact with
said actuating posts, and means to bias said key members out of
contact with said actuating posts whereby said key members can be
depressed selectively to actuate each of said key-lever-actuating
posts to effect the typewriting operation.
2. A keyboard as defined in claim 1 in which said key support
members are eight in number.
3. A keyboard as defined in claim 1 in which each key support
member comprises four upstanding wall portions, each wall portion
being joined to the next adjacent wall portion by a
reduced-dimension member, and each wall portion having a
substantially arcuate-shaped upper edge.
4. A keyboard as defined in claim 3 in which said means to bias
said key members comprise an upstanding spring member retained on
the upper edge of each said wall portion proximate the center
thereof.
5. A keyboard as defined in claim 1 in which each said key member
is of substantially polygonal-shaped configuration having a
peripheral flange extending about the lower edge thereof, said
flange being of substantially the same outer dimension as that of
each said key support member, and a keyboard cover having apertures
corresponding in number and disposition with said key members, said
cover being disposed over said key members such that each said key
member extends through said apertures and is retained therein by
said peripheral flange.
6. A keyboard as defined in claim 5 in which each key support
member comprises four upstanding wall portions, each said wall
portion having a substantially arcuate-shaped upper edge, and said
means to bias said key members comprise an upstanding spring member
retained on the upper edge of each said wall portion proximate the
center thereof, the upper extremities of said spring members lying
in a common plane which is coincidental with the lower surface of
said flange.
7. A keyboard as defined in claim 6 in which each said key member
is operable selectively to depress any one of said four posts
disposed adjacent each corner of said support member by pivoting
said key member on the arcuate upper edges of said wall
portions.
8. A keyboard as defined in claim 6 in which the upper extremities
of each said key-lever-actuating post lie in a common plane below
the plane defined by the crests of the arcuate edges of said
upstanding wall portions.
9. A keyboard as defined in claim 8 in which there are two sets of
catercornered posts disposed adjacent each corner of said support
member, each post of the first set comprising a planar nondeformed
member, each post of the second set being a mirror image of the
other and comprising a first upstanding portion affixed to a
respective actuating lever, a second portion deformed normal to
said first portion, a third upstanding portion deformed normal to
said second portion, a fourth substantially L-shaped portion
deformed normal to said third portion, and a fifth upstanding
portion disposed normal to said fourth portion but lying in a plane
parallel to the plane of said first portion.
10. A keyboard as defined in claim 8 in which said fifth post is of
substantially rectangular configuration with parallel side edges
and an arcuate-shaped upper edge joining said side edges.
11. An electric typewriter key construction for actuating a set of
five adjacent typewriter key levers and associated type bars having
characters of indicia on the faces thereof, said key construction
comprising, a polygonal-shaped key support member adapted to be
mounted overlying said set of key levers, each key lever having an
upstanding key-lever-actuating post affixed thereto, four of said
posts being disposed respectively adjacent each corner of said
support member and a fifth post disposed proximate the center of
said support member, a key member, means to movably retain said key
member above said key support member in contact with said actuating
posts, and means to bias said key member out of contact with said
actuating posts whereby said key member can be depressed
selectively to actuate each of said key-lever-actuating posts to
effect the typewriting operation.
12. A key construction as defined in claim 11 in which said key
support member comprises four upstanding wall portions, each wall
portion being joined to the next adjacent wall portion by a
reduced-dimension member, and each wall portion having a
substantially arcuate-shaped upper edge.
13. A key construction as defined in claim 12 in which said means
to bias said key member comprise an upstanding spring member
retained on the upper edge of each said wall portion proximate the
center thereof.
14. A key construction as defined in claim 11 in which said key
support member comprises four upstanding wall portions, each said
wall portion having a substantially arcuate-shaped upper edge, and
said means to bias said key member comprise an upstanding spring
member retained on the upper edge of each said wall portion
proximate the center thereof.
15. A Key construction as defined in claim 11 in which there are
two sets of catercornered posts disposed adjacent each corner of
said support member, each post of the first set comprising a planer
nondeformed member, each post of the second set being a mirror
image of the other and comprising a first upstanding portion
affixed to a respective actuating lever, a second portion deformed
normal to said first portion, a third upstanding portion deformed
normal to said second portion, a fourth substantially L-shaped
portion deformed normal to said third portion, and a fifth
upstanding portion disposed normal to said fourth portion but lying
in a plane parallel to the plane of said first portion.
16. A key construction as defined in claim 15 in which said fifth
post is of substantially rectangular configuration with parallel
side edges and an arcuate-shaped upper edge joining said side
edges.
Description
The foregoing and other advantages of the invention will become
apparent from the ensuing disclosure in which a preferred
embodiment of the invention is described in detail and illustrated
in the accompanying drawings. It is contemplated that minor
variations in structural features and arrangement of parts thereof
may appear to the skilled artisan without departing from the scope
or sacrificing any of the advantages of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary perspective view of a standard electric
typewriter, but with the standard typewriter keys removed therefrom
and the keyboard of the invention replaced thereon.
FIG. 2 is an enlarged, exploded perspective view of two keys, and
associated elements, of the typewriter keyboard of the
invention.
FIG. 3 is a fragmentary perspective view of the segment and type
bar arrangement of the standard electric typewriter illustrated in
FIG. 1.
FIG. 4 is a fragmentary sectional view taken through the housing of
one form of standard electric typewriter, with the keyboard of the
invention illustrated assembled thereon.
FIG. 5 is a fragmentary sectional view taken through the housing of
a second form of standard electric typewriter, with the keyboard of
the invention illustrated assembled thereon.
FIG. 6 is a top plan view of the typewriter keyboard of the
invention.
FIG. 7 is a fragmentary sectional view taken through one of the key
members of the keyboard of FIG. 1, illustrating one key member of
the invention in rest position. FIG. 8 is an enlarged view similar
to that of FIG. 7, illustrating in solid line a key member of the
invention in rest position and in dotted line in actuating
position.
FIG. 9 is a fragmentary top plan view of one group of five key
levers of a standard electric typewriter, with a key support member
of the invention and the upstanding key-lever-actuating posts
positioned thereon.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 there is illustrated one form of a standard electric
typewriter, designated generally 8, including a housing 10 and a
keyboard panel or dust cover 12 upon which all of the keys of the
typewriter are mounted. All of the features of the typewriter 8
illustrated in FIG. 1, except for the keyboard designated generally
14, are standard. The keyboard 14 is of a construction which
comprises the structure of the invention to be defined in detail
hereinafter.
Looking at FIGS. 4 and 5, the working components of two types of
standard electric typewriters are illustrated, one of which type is
illustrated in FIG. 4 and the other in FIG. 5. The typewriter 8'
shown in FIG. 4 has a housing 10', a keyboard cover 12' and a
plurality of type bars, one such type bar 16 being illustrated.
Actuation of the type bar 16 is accomplished by depressing key
member 18 which in turn depresses key lever 20. The key lever 20 is
pivoted about pivot point 22 at one end thereof and returned to the
unactuated position illustrated by spring member 24 at the end
opposite pivot point 22. Upon depression of key lever 20, surface
26 engages connecting linkage 28 which is pivoted about point 30 to
engage cam member 32 against drive roller 34. Drive roller 34 is
maintained in constant motion by a constant speed motor (not
shown). When contact is made between cam 32 and drive roller 34,
cam lever 36 is engaged against the drive roller 34 to be actuated
thereby. Roller 34 moves cam lever 36 in a clockwise direction
about cam lever carrier 38 which moves connecting rod 40 to actuate
type bar 16 and swing the face 42 thereof in a counterclockwise
direction. Type bar is is pivoted about point 41 and typeface 42
engages the typing paper (not shown) held in place upon cylinder 44
by pressure roll 46. The type guide 48 guides type bar 16 such that
typeface 42 having typewriting character 43 thereon engages the
typewriting paper in proper alignment.
It should be understood that there is illustrated in FIG. 4 only
one of a plurality of typing keys and associated parts and that in
a standard typewriter there will be forty or more such keys, key
levers, cam levers, type bars, etc., each key and associated parts
being operative to actuate its respective typeface and imprint the
desired character 43 on the typewriting paper.
In FIG. 5 there is illustrated a second form of standard electric
typewriter 8" in which the key lever 20' is pivoted proximate the
middle thereof rather than at one end as in the typewriter 8"
illustrated in FIG. 4. Typewriter 8" includes a plurality of key
members and associated parts, one key member 18' being shown. A
spring member 24' is provided to return key lever 20' to its rest
position following movement thereof upon activation of key member
18'. Key lever 20' pivots about pivot point 22' to move connecting
linkage 28' and engage cam 32' against drive roller 34'. Cam lever
36' thereby is moved in a clockwise direction, moving connecting
rod 40' and in turn moving type bar 16' having typeface 42' and
typewriting character 43'.
Certain of the elements illustrated in FIGS. 4 and 5 also are
illustrated in FIG. 3 for purposes of clarity in describing the
elements of standard electric typewriters with which the invention
herein is concerned. These elements of a standard typewriter form
no part of the invention claimed herein and are shown merely so
that a complete understanding of the invention can be had. There is
illustrated the typeface 42 of type bar 16, the same being in
imprint position adjacent the typewriting paper (not shown). There
also is shown a support arm 50 of the typewriter the fulcrum wire
52 and the segment portion 54. Also partially shown is cam lever
36, and connecting rod 40, in addition to other structural elements
which are not necessary for a complete understanding of the
invention.
Looking now at FIG. 2, two adjacent typewriter keys of the
invention and associated parts are illustrated. The typewriter keys
shown in FIG. 2 comprise only a portion of a total of eight such
keys (FIGS. 1 and 6) which together form the keyboard of the
invention. Each of the keys illustrated in FIG. 2 is identical in
construction and only one such key 140 with associated elements
therefore will be described in detail. It is to be understood that
each of the remaining seven keys has corresponding structure to
that described in connection with key 140.
In FIG. 2 there is shown five adjacent key levers, 60 through 68,
of a standard electric typewriter, which key levers are operable to
actuate five type bars connected respectively to their associated
key levers. It is to be understood that the key levers 20, 20' of
FIGS. 4 and 5 are representative of any one of the key levers 60-68
shown in FIG. 2.
Each key lever 60-68 of the standard typewriter will have an
individual key member associated therewith through an upstanding
key-lever-actuating member to effect operation of the respective
typeface for the key lever. These elements of a standard typewriter
have not been shown, but instead, the key levers are illustrated
with individual key members and actuating posts removed which is
the modification that would be performed in adapting a standard
typewriter for use with the key and keyboard arrangement of the
invention.
Upon removal of the individual key members and actuating posts
which are standard equipment on the typewriters illustrated in
FIGS. 4 and 5, each of five adjacent key levers, 60-68 will be
fitted with the five upstanding key lever actuating posts, 80
through 88, of the invention. Disposed above the key levers 60-68,
and in association with the actuating posts 80-88, is a key support
member 90 which is of substantially square-shaped configuration and
includes four upstanding wall portions 92, 94, 96 and 98. Each
upstanding wall portion 92-98 is connected to its next adjacent
wall portion by a reduced-dimension member 100 of substantially
L-shaped configuration, joining each respective wall portion
normally to its next-adjacent portion. The upper edges 102 through
108 of the wall portions 92-98 are of substantially arcuate
configuration and have positioned at the center thereof a
respective upstanding spring member 110 through 116 retained by any
suitable means such as weldment in a groove provided along the
arcuate edge of each wall member.
The upstanding key-lever-actuating posts 8014 86 are arranged and
positioned on their respective key levers 60-68 such that each post
is positioned proximate one corner respectively of the key support
member 90. The catercorner posts 80, 84, are identical in
construction and comprise a planar, nondeformed metal member. Each
catercorner post 82, 86 is of symmetrical configuration and
comprises an upstanding portion 120, a second portion 122 deformed
normally to the portion 120, a third portion 124 deformed normally
to the portion 122, a fourth portion 126 of substantially L-shaped
configuration and disposed normal to portion 124, and a last
portion 128 which is disposed normal to the plane of portion 126
but lying in a plane parallel to the plane of portion 120. Post 86
is substantially similar in configuration to post 82 but comprises
a mirror image of the latter. The upper extremities of each post
80-86 lie in the same plane which lies below the crest of arcuate
edges 102-108 of wall portions 92-98.
A fifth upstanding key-lever-actuating post 88 is associated with
each key support member 90 for actuation of key lever 64. Actuating
post 88 comprises a substantially rectangular-shaped member having
parallel sides 130, 132 and an arcuate edge 134 at the upper
portion thereof. The crest of edge 134 lies slightly above the
plane defined by the crests of arcuate edges 102-108 of wall
portions 92-98.
Each respective key support member 90 and its associated
key-actuating-lever posts has disposed thereabove a respective key
member 140 of substantially square-shaped configuration having an
upper surface 142 with suitable indicia provided at each corner
thereof. Key member 14 could, if desired, be of polygonal or
rectangular configuration. A central depression 148 is provided and
the fifth indicia is etched in the center of the depression. A
flange portion 150 of peripheral dimension greater than the key
member 140 extends about all edges of the key member and is
approximately the same in outer dimension as the outer dimensions
of the key support members 90.
A dust or keyboard cover 12 with apertures 13 corresponding in
number and size to each key member 140 is provided to overlie the
said key members 140 such that the key members 140 extend through
the apertures 13 and are retained therebelow by the flange 150.
When each key member 140 is in place with dust cover 12 positioned
thereabove, as illustrated in FIG. 1, the lower surface of flange
150 will abut the upper extremities of spring members 110-116,
which in turn will bias the key members 140 in an upwardly
direction so that flange 150 abuts the lower side of dust cover 12,
as best seen in FIG. 7.
Each key member 140 is operable to actuate key lever post 88 by
depressing key member 140, thereby asserting pressure upon central
depression 148 to depress key lever 64. Depression of key lever 64
will operate the type bar associated therewith to impress a desired
character on the typewriting paper. The remaining four
key-lever-actuating posts 80-86 are actuated by pivoting key member
140 on the arcuate upper edges of support member 90 to depress any
individual one of said key-lever-actuating posts, and its
associated key levers to impress the desired typewriting character
on the paper. Since the crest of each edge 134 lies slightly above
the plane defined by the crests of the arcuate edges 102-108 of
wall portions 92-98, depression of any of the actuating posts 80-86
will not result in concurrent depression and actuation of
key-lever-actuating post 88. Conversely, depression of key-lever
actuating post 88 will not result in actuation of any of the
actuating posts 80-86 because the crest of edge 134 of
key-lever-actuating post 88 and the upper extremities of each post
80-86 lie in different planes. Furthermore, since edge 134 of the
key-lever-actuating post 88 is arcuate in shape, flange 150 of key
member 140 is free to move axially and pivotally on the arcuate
edges 102-108 of key support member 90, such that simultaneous
depression and actuation of more than one key-lever-actuation post
is not possible. Indicia on the face of each key member 140 at each
corner and the center thereof, as best seen in FIG. 6, designate
which key lever will be actuated upon pivoting or depressing the
key member.
Looking at FIG. 8, key member 140 is shown in solid-line position
at rest, and in dotted-line position being pivoted upon upper
arcuate edge 106 of upstanding wall portion 96 to depress
key-lever-actuating post 86 and thereby actuate key lever 66. Upon
release of pressure, spring members 112 and 114 will force key
member 140 to return to its rest position illustrated in solid
line. In like manner each of the respective upstanding
key-lever-actuating posts can be depressed by exerting pressure on
the central depression or each corner of key member 140 to actuate
the desired key lever and imprint a desired typeface on the
typewriting paper, thereby effecting performance of the typewriting
operation. The various movements of key 140 are illustrated
schematically in FIG. 9.
The keyboard arrangement illustrated in FIG. 1 is such that 40
characters can be actuated using the eight fingers of a typist's
hands. Using the shift lever of a common standard typewriter, the
number of available characters is doubled so that 80 characters can
be actuated. In many instances, standard typewriters are provided
with more than 80 typewriting characters including, in addition to
alphabetical characters, certain nonstandard-type characters such
as a question mark, a plus or equal sign, or fractional symbols.
Where it is desired to adapt such a typewriter to use with the
invention, the keys for these additional typewriting characters can
be left on the typewriter keyboard for individual use when needed,
and will be complementary to the eight keys of the invention.
It should be noted that, since the invention greatly reduces the
space occupied by conventional keyboards, room is now available for
a row of numbers either above or below the main keyboard. The
spatial economy thus afforded by the main keyboard of the invention
makes feasible the heretofore unprecedented combination of a
typewriter and adding machine, a most flexible business machine.
Similarly, the spatial economy afforded by the invention makes
possible many other specific combinations of machines, all of which
combinations yield increasing functional versatility.
In adapting the standard typewriter for use with the invention, it
is necessary only to remove the key-lever-actuating posts provided
with the standard typewriter, and to modify the keyboard or dust
cover to have properly located apertures for receipt of the key
members of the invention. The key-lever-actuating posts of the
invention can be welded or otherwise secured to the key levers of a
standard typewriter and the eight key support members 90 can easily
be positioned above each of the five respective key levers to
completely transform a standard typewriter into one utilizing the
improved typewriter keyboard of the invention.
Although not specifically illustrated, the invention may be
implemented in a nonelectrical or manual typewriter.
* * * * *