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Патент USA US3080057

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March 5, 1963
Filed March 9,' 1962
2 Sheets-Sheet 1
am. '4?
March 5, 1963
Filed March 9, 1962
2 Sheets-Sheet 2
. -__
‘ EZw/L?w
Patented Mar. 5, 1963
Joseph R, ?palla, Avon, Conn, assignor to Royai McBee
Corporation, New York, N.Y., a corporation of New
Filed Mar. 9, 1962, Ser. No. 178,739
5 Claims. (Cl. 197-63)
A further object of the invention is in the provision of
apparatus for positioning margin stops which are nor
mally freely movable relative to a rack bar.
Other objects and many of the attendant advantages
of this invention will be readily appreciated as the same
becomes better understood by reference to the follow
ing detailed description when considered in connection
with the accompanying drawings in which like reference
numerals designate like parts throughout the ?gures there
The invention relates to margin regulators for type 10 of and wherein:
FIGURE 1 is a perspective view showing the margin
regulator system of the invention incorporated in a ?xed
writers or like business machines; more particularly it
relates to margin regulators operative to arrest the travel
ing element of a typewriter; and speci?cally it relates to
margin regulators which are normally freely positionable
on a rack bar and operative to engage and lock with the
rack bar in response to the movement of the traveling
element to locations de?ned by selectively positioned
margin regulators.
Margin regulators presently the vogue on machines
having a ?xed printing point and a movable platen are
‘mounted to the rear of the platen and normally engage
a rack bar carried by the platen carriage. Depending on
the position of the regulators relative to a frame mounted
center stop, the setting of the right and left margin regu
lators each requires the movement of the carriage to a
desired position and the manipulation of an associated
release mechanism to effect the disengagement of its as
sociated margin regulator whereby it may be propelled
by a spring toward the center stop or, manipulation of
the release mechanism and then movement of the disen
gaged margin regulator by movement of the carriage to
a desired position.
As is apparent from the above several manipulative
printing point typewriter;
FIGURE 2 is a schematic view of the margin regu
lator system shown in FIGURE 1:
FIGURE 3 is a perspective View of a regulator show
ing more clearly its construction and the connection there
to of the loop shown in FIGURE 1;
FIGURE 4 is a perspective view showing a margin
regulator system of the invention incorporated in a mov—
able printing point typewriter; and
FIGURE 5 is a view of the front mask of a mov
able printing point typewriter.
Referring now to the drawings there is shown in FIG
URE 1 a carriage 11 movable relative to a typewriter
frame 12 and carrying a platen 13 supported in carriage
end frames 14 (FIGURE 2). As is usual in machines
of this type a margin rack bar 15 is secured at its ends
to the carriage end frames 14 ‘behind the platen 13 and
below a paper table 16. The margin rack in accordance
with one embodiment of the invention is formed with
rectangular shaped locking teeth 17 along one edge and
with generally triangular detenting teeth 18 along an op—
steps are necessary to set each margin regulator and the
posite edge. As will be understood the teeth 17 and 18
hardware necessary to accomplish the margin setting 35 are spaced in accordance with the pitch of the machine.
function is relatively complicated. A further drawback
As shown in FIGURE 1 a pair of margin regulators gen
of margin regulating systems of the above type is the fact
erally designated by reference numeral 21 are mounted
that the set positions of the margin stops are not visible
‘for movement on the rack bar 15. The margin regula
to an operator and can only be determined by moving
tors are similar and, having reference to FIGURES 1 and
40 3, each generally comprises a rectangular body 22 adapted
the carriage.
Margin regulators on machines of the movable printing
to encompass the rack bar. A U-shaped rack engaging
point and stationary platen type are normally mounted
element 23 embracing each body is pivotally mounted on
on and in locking engagement with a rack bar affixed to
pins 24 extending from opposite sides of the regulator
the typewriter frame forwardly of and below the platen
body into the legs 25 of the U-shaped element. As most
whereby they are positioned relative to the carriage sup
clearly shown in FIGURE 3 a stop engaging arm 26,
porting a type matrix. In these machines levers affixed
to the margin regulators extend forwardly through the
front mask of the typewriter, a horizontal slot being pro~
vided in said front mask whereby the levers may be
manipulated to disengage the regulators from the rack
and then used to move them relative to the matrix print
ing element carriage to a desired position and then re
latched. Here again the arrangement requires disengage
integrally formed with one leg of each U-shaped element
23 and forming a V-shape therewith, extends to the same
edge of the rack bar as the base or rack engaging portion
27 of the U-shaped element with its extremity 28 posi
tioned to be engaged by the center stop 29 of the ma
chine when the carriage and the rack mounting the regu
lators moves to the center stop. The U-shaped element
23 is biased by a spring 31 (FIGURE 3) secured thereto
ment, movement and re-engagement.
and to the body such that the base 27 of the U-shaped
In accordance with the present invention margin regu
element is normally disengaged from the teeth 17 on the
lators or stops are normally freely positionable on a mar
rack bar, stops 32 limiting movement of element 23.
gin rack bar and are cause to engage and lock with the
Also embracingly mounted on the regulator body is a
bar only upon movement of the traveling element of the
U-shaped spring element 33 whose legs are secured to
machine to a stopping point de?ned by a positioned regu
and supported by the body 22 such that a detent roller
lator. Since the regulators are freely movable on the 60 34 mounted on the base portion of the spring element
rack bar they may be set to desired positions simply by
biases the detent roller against the teeth 18 on the rack.
moving them to said desired positions. An additional fea
As shown in FIGURE 1 and more particularly in FIG
ture of the instant arrangement, particularly with respect
URE 2 each extremity of the rack bar 15 rotatably mounts
to ?xed printing point typewriters, is the fact that the set
a shaft 35. Each of the shafts extends through the rack
positions of the margin regulators are always visually de 65 bar perpendicularly to the plane of the teeth thereof and
terminable by an operator.
each ?xedly carries a pulley 36 on one side of the rack
An object of the invention therefore is in the provision
bar and rotatably carries a pulley 37 on the other side of
of a simpli?ed margin regulator system.
the rack bar. The ?xed pulley 36 on one shaft is on the
Another object of the invention is to provide a margin
same side of the rack bar as the rotatably mounted pulley
regulator system wherein margin setting may be accom 70 37 on the other shaft, as is apparent from FIGURE 2.
plished in a facile manner and wherein the settings are
A continuous dimensionally stable cord or belt '38 is
always visible.
looped around each pair of pulleys 36 and 37. Each belt
38 is suitably secured as at 39 to the body of an associ
ated margin regulator 21. As will hereinafter be more
clearly evident the rotation of a shaft 35 will rotate the
pulley 36 a?ixed thereto which in turn will frictionally or
positively drive the belt 38 and the regulator associated
therewith either to the right or left relative to the center
' stop 29 depending on the direction of rotation of the shaft.
Each of the shafts also carries on its rearwardly extend
ing end a ‘bevel gear 42. Each bevel gear 42 is adapted to
be driven by a bevel gear 431 secured on 1a stub shaft 44
rotatably supported in the carriage end frames 14. Each
stub shaft also carries a wheel 45 or other suitable index
able element.
As shown in FIGURE 1 the wheels 45
extend through slots 46 in the end frame masks 47 where
by numerals representing space increments will be visible
to an operator and whereby the wheels may be manually
turned by an operator relative to index marks 48 on the
end frame masks. The setting of the right and left margin
regulators is accomplished simply by turning the left and
right margin wheels respectively designated 45L and 45R
which drive associated bevel gears 43 and 42 which in
turn drive associated pulleys 36, the latter moving the belt
and normally disengaged regulator ‘associated therewith
to a desired setting. If a sheet is placed in the machine
adjacent the paperguide 49 positioned in a zero position,
an operator after determining how many spaces she
wishes to indent her left margin, e.g. 10 spaces, need only
vmove the wheel 45L so that the number 10 is aligned with
the index mark 48. To set her right margin, she need
only note the number on the cylinder scale 50 aligned with
the right edge of the paper, add to it the number of spaces
ling the limits of motion of said carriage comprising
a rack bar having at least one serrated edge,
a pair of margin regulators slidably disposed on said
spring urged detent means yieldably maintaining said
regulators in set position on said bar, each of said
regulators having a locking detent spring urged out
of engagement with said serrated edge,
stop means positioned for abutting engagement with
said locking detents whereby upon relative movement
and eventual engagement of one of said regulators
and stop means at the locations de?ned by the set
positions of said regulators, said locking detents are
rocked into locking engagement with said rack bar,
said stop means and said rack bar being one on the
frame and one on the carriage of said typewritter,
means connected to said margin regulators for position
ing said regulators and for visibly indicating the loca
tions of said regulators, said means comprising a pair
of pulleys associated with each margin regulator, the
pulleys of a pair being mounted on opposite ends of
said rack bar,
a ?exible dimensionally stable belt looped around each
pair of pulleys and secured to an associated regulator,
an indexable member associated with each margin regu
means for visibly rotatably mounting said indexable
members on said typewriter so that an operator can
selectively rotate them,
and means operatively connecting each of said index
able members to one of the pulleys associated with a
she wishes to indent in from the right, and move the
wheel 45R so that the correct number is opposite the in
margin regulator whereby rotation of said members
dex mark 48 The detent rollers normally yieldingly hold
the freely positionable regulators 21 in the position to
which they have been set but permit their movement by
the setting wheels and gearing. In operation, the regula
tors having been set, when the carriage, movable in letter
ative to said stop means.
2. Apparatus as recited in claim 1 wherein said rack
bar is secured to said carriage, and said stop means is se
cured to said frame.
3. Apparatus as recited in claim 1 wherein said rack bar
is secured to said "frame, and said stop means is secured
to said carriage.
4. In a typewriter having a frame and a carriage sup
feed or carriage return direction, carries a regulator to
the center post 29 of the machine, e.g. when the carriage
moves in letter feed direction the arm 26 of the right
margin regulator will engage the center stop and be driven
clockwise as viewed in the FIGURE 1 thereby driving
the base 27 of the U-shaped element into engagement with
the rack, stopping carriage movement.
The same arrangement of regulators may be employed
with a ‘movable printing element or matrix machine. As
shown in FIGURE 4 a movable printing element 61
mounted on a carriage 62 supported by rails 63- is pro
vided with a stop 64 positioned to actuate the stop arms
26 of regulators 21 mounted on a rack bar 65 which, in
this type of machine, is mounted on the frame forwardly
of the printing element. The regulators 21 shown in FIG
URE 4 may be ‘associated with wheels, gearing and
pulleys as described with reference to FIGURE 1, the
wheels 71L and 71R in this instance extending through
vertical slots 72 on, opposite sides of the front mask of
the machine as shown in FIGURE 5.
In an alternative embodiment (not shown) but similar
to that of FIGURES 1, 2 and 5, adetenting Wheel and
associated detent member could be associated with shafts
35 or 44 thereby eliminating the necessity for providing
detenting teeth on the rack bar and detenting elements on
the regulators.
It should be understood that the foregoing disclosure
relates to only a preferred embodiment of the invention
and that it is intended to cover all changes and modi?ca
tions of the example of the invention herein chosen for
the purposes of the disclosure which do not constitute
departures from the spirit and scope of the invention.
The. invention claimed is:
1. In a typewriter having a frame and a carriage later
ally movable thereon,
a margin regulator mechanism for selectively control
effects lateral movement of associated regulators rel
porting a printing element laterally movable thereon,
a rack bar having ?rst and second serrated edges se
cured to said frame,
a margin regulator slidably disposed on said bar,
means for yieldably retaining said regulator in a set
position on said bar,
means carried by said regulator biased out of engage
ment with said bar and adapted to lockingly engage
said rack bar,
a stop member secured to said carriage adapted upon
movement of said carriage to the location de?ned by
said set position to engage said last named means
thereby causing it to lock with said rack bar,
operator cont-rolled means for moving said regulator
relative to said carriage,
said operator controlled means comprising indexable
means rotatably mounted on said typewriter frame,
a pulley on either end of said rack bar,
a continuous belt looped about said pulleys and se
cured to said regulator,
and means operatively connecting said indexable means
and one of said pulleys whereby rotation of said
indexable means effects the lateral movement of said
regulator relative to said stop member.
5. In a typewriter having margin regulators normally
freely movable on a rack ‘bar and operable into locking
engagement with said rack bar upon engagement of said a '
regulators with an abutment member, said abutment mem
ber and said rack being one on the frame and one on the
movable carriage element of said typewriter; the improve
ment comprising shafts rotatably mounted in opposite ends
of said rack bar.
a drive pulley secured to and a driven pulley rotatably
mounted on each shaft, the drive pulley on one shaft
being associated with the drive pulley on the other
a belt looped about each of said ‘associated drive and
driven pulleys, means for securing said belts to asso
ciated margin regulators, and means for indexably
rotating said shafts thereby to selectively position said
margin regulators relative to said rack bar.
References Cited in the file of this patent
Aebi _________________ __ Dec. 25, 1951
Phillips ______________ __ Apr. 21, 1959
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