Year: 1888

page_text: Date of Application, 3rd Jan., 1888
Specification Accepted, 13th Apr., 1888
A communication from abroad by ALEXANDER T. BROWN, of the City of Syracuse,
in the County of Onondaga, and State of New York, U.S.A., Mechanic.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for Foreign
Patent Solicitors 6, Lord Street, Liverpool and 6, Bank Street, Manchester, both in
the County of Lancaster and 323 High Holborn, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The invention relates to type-writers and is best described by aid of the accom-
panying drawings in which :-
Fig. 1 is an isometrical elevation of that portion of the type-writer to which the
invention especially appertains, viz. the carriage, its mounting upon the body of the
machine, and the printing platen mechanism; and
:
Fig. 2. is an end elevation of the same parts of the machine, showing the printing
platen rolled or rocked back off from the printing point or centre, to throw the
printing up into view of the operator, without raising or tilting the carriage itself.
The invention consists in the following novel features, viz. :-
1. A type-writer carriage mounted upon ball bearings, such balls fitting in coin-
cident grooves in the carriage frame and in the top of the machine, with stops in the
grooves to retain the balls.
2. In a type-writer carriage provided with a rocking platen holder, arranged to roll
off from the printing-mechanism to expose the line being printed, to the view of
the operator.

page_text: 3. In a type-writer carriage provided with a rocking cradle in which the roll or
platen is mounted, and ways upon the carriage frame upon which the cradle rocks.
4. In a typewriter carriage a rack thereon, a cradle provided with geared rockers
meshing with the rack, and a roll or platen mounted in the cradle.
It is constructed as follows, the reference letters and figures used to indicate the
several parts, representing like parts wherever they occur.
A, represents the top of the machine across the front and rear of which grooves 1
and 2 are cut.
B, is the carriage frame, consisting of a rear bar 3, grooved as at 4. upon its under
face longitudinally a front bar 5, grooved in like manner; and end pieces 6, all
integral with each other if desired.
The ends 6,.consist of the yoke 7, mounted upon a base piece which is offset as to
that part between the upright arms of the yoke, as at 8, throwing it out of the same
vertical plane as the yoke, and upon the top of this offset 8; or within the yoke a
rack 9 is constructed.
In the grooves 1, 2, metallic. balls 20 are placed; upon which the carriage is
mounted, the grooves in the bars 3 and 5 receiving the upper portions of the balls.
C, is the printing roll provided with bearing gudgeons 10.
D, is the shifting frame consisting of ends 11, paper apron 12, pressure rod 13,
and lever 14.
The ends 11, each consist of a place of metal, having upon its lower side a segmental
curved rack 15, an upper rearward arm 16, to the extremity of which the apron is
secured; an upward lever 14, and a front arm 17, in which an end of the rod 13 is
mounted; and also a hole to receive a gudgeon of the roll C.
The apron 12, is of ordinary construction except that adjacent to its front edge a
groove or corrugation is formed in which is mounted the roller or rollers 22, bearing
against the roll or platen.. And upon the flange in front of this groove a scale is
marked.
This groove or corrugation and the flange protect the rollers 22, from contact with
the inking ribbon.
The pressure rod 13, is provided with sliding or adjustable spring fingers, one
being shown at 18, adjustably secured to the rod. The upper arms of these fingers
curve to conform to the roll C.
The lower arms are curved in like manner, and, adjacent to their lower ends, in
each a transverse roller 19 is mounted, the inside of which roller bears against the
face of the roll C.
In the grooves 1, 2, usually at their ends as well as at intermediate points stops
shown at a are placed, which limit the travel of the balls and also of the carriage.
The shifting frame D, really constitutes a rocking carrier for the roll C, and is
usually provided with mechanism to cause it to return to its position ready for
printing...
In operation, when the operator wishes to inspect a line of writing as it is being.
printed, the backward pressure of the lever 14, and the rocking of the frame D
causes the roll to change position backward and off from the printing point, and
without any actual rotation of the roll upon its gudgeons, throws the roll over so that
the line being printed is brought up to the front side of the roll, in full sight for
examination, correction of a letter, &c.
This rocking of the carrier does not change the relative positions of the roll, apron,
pressure-rod and fingers as to each other.
The rack upon the frame may be made inclined or in fact actually vertical, so that
the carrier will return of its own gravity to a normal position.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent, I.declare that what I claim is :
1. A type-writer carriage mounted upon balls travelling in grooves in the top of
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page_text: the machine, and in the carriage frame, said grooves having stops to prevent escape
of the balls, substantially as shown and described.
2. A type-writer carriage consisting of a frame carrying a rocking platen carrier
adapted to roll off from over the printing mechanism, substantially as described and
for the purposes specified.
3. A type-writer carriage bearing a cradle in which the roll is mounted, said
cradle rocking on ways on the carriage, the parts being combined substantially as
stated.
4. A type-writer carriage having a rack thereon, a cradle having teeth on its
rockers engaging said rack and a roll mounted in said cradle, all in combination
substantially as described.
'
WM. P. THOMPSON & Co.,
Agents for the Applicant.