Improvements in and relating to Carriage Frames of Typewriters.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Carriage Frames of Typewriters.
We, HENRY STANBRIDGE, Engineer, and ALFRED AKERS, Gentleman, both of
Cadby Hall Works, West Kensington, London, W., do hereby declare the nature
of this invention to be as follows:-
This invention relates to improvements in the carriages frames of typewriters,
as regards the supporting of the movable printing carriage on ball bearings, so
designed as to avoid friction as much as possible, combined with easy adjustment
in manufacture and also in providing stops at each end of the printing carriage.
In carrying out this invention, the carriage frame is made rectangular in shape,
with two parallel longitudinal walls. On the inside of these walls a slot is cut
of V shape, the slots facing each other, thus <> and the printing carriage
carries 4 or more screwed recessed bosses. The said recessed bosses contain a
certain number of small balls, of uniform diameter, and one large ball in the
centre. The diameter and depth of this recess is so arranged in conjunction with
This large
the diameters of the large and small balls, and the number of the latter, that
slightly more than one half of the large ball projects from the recess.
ball runs in the V groove and is kept therein by adjusting the screwed bosses
outwards.
Two of these screwed bosses are screwed home and locked, and the other two
are adjustable to vary the width laterally between the said V grooves cut into
the longitudinal walls of the carriage frame.
The printing carriage is thus supported by 4 or more large balls, running in the
said V grooves, and in their turn the large balls rest on a half circle of small
balls running in the circular screwed bosses. Centrally in the said rectangular
carriage frame a rod in one piece or divided and supported in the centre is placed.
The said rods are cut with ratchet teeth. On the rods, the stop pieces are made
to slide, having each a pawl to engage with the ratchet teeth when adjusting the
At either outside ends of these rods is attached a handle, so
stops for distance.
that the operator can turn the stops down and allow the printing carriage to pass
over the same when they are not required.
Caronth day of September 1899.
HENRY STANBRIDGE.
ALFRED AKERS.
COMPLETE SPECIFICATION.
Improvements in and relating to Carriage Frames of Typewriters.
We, HENRY STANBRIDGE, Engineer, and ALFRED AKERS, Gentleman, both of
Cadby Hall Works, West Kensington, London, W., do hereby declare the nature

page_text: 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:
-
This invention relates to improvements in the carriages frames of typewriters
as regards the supporting of the movable printing carriage on ball bearings, so
designed as to avoid friction as much as possible combined with easy adjustment
in manufacture and also in providing stops at each end of the printing carriage.
In carrying out this invention, the carriage frame is made with two parallel
longitudinal walls, the whole of rectangular shape. On the inside of each of these
walls a slot is cut of V shape, the slots facing each other thus <> and the printing
carriage carries 4 or more screwed recessed bosses. The said recessed bosses
contain a certain number of small balls of uniform diameter and one large ball
in the centre, the diameter and depth of this recess is so arranged in conjunction
with the diameter of the large and small balls, and the number of the latter, that
slightly more than one half of the large ball projects from the recess.
This large
ball runs in the V grooves and kept therein by adjusting the screwed bosses
outwards.
Two of these screwed bosses are screwed home and locked and the other two
are adjustable to vary the width laterally between the said V grooves cut into
the longitudinal walls of the carriage frame. The printing carriage is thus sup-
ported by 4 or more large balls running in the said V grooves and in their turn
the large balls rest on a half circle of smaller balls revolving in the circular
recessed screwed bosses. Centrally in the said rectangular carriage frame a rod
in one piece or divided and supported in the centre is placed. The said rods are
cut with ratchet teeth. The stop pieces are made to slide on the rods and have each
a pawl to engage with the ratchet teeth when adjusting the stop for distance.
At either outside end of these rods attached a handle so that the operator can
turn the stops down and allow the printing carriage to pass over the same when
they are not required.
In the accompanying drawings to this specification.
Fig. 1 is a plan view of the carriage frame with the movable printing carriage
in position, also shewing the 2 adjustable stops one at each end of the frame.
The one stop up and the other down.
Fig. 2 is an end view of the above shewing one of the stops up.
Fig. 3 is an enlarged sectional view of the ball containing cups and part of
carriage frame with V slot.
Similar letters of reference indicate similar parts throughout.
A is the printing platen or cylinder.
a is the axis of the same.
B is the printing carriage.
are the parts of the printing carriage which come into contact with the
adjustable stops.
72 are projections which carry the ball containing cups.
C are the 4 circular ball-containing cups.
clare the screwed shanks of the same.
are the lock nuts.
are the 4 large balls, half of which are in the V grooves or slots cut in the
longitudinal walls of the carriage frame.
are the small balls.
are the flat springs which retain the balls in their place and act as an axis for
the large balls.
D) is the carriage frame with parallel longitudinal walls.
are the V shaped slots cut in the said walls.
d are transverse connecting pieces between the said walls which carry plates
to support the adjustable stop rods.
is the central transverse piece of the frame.
E are the 2 stop rods in the centre of the frame.
el are the plates at either end of the frame to support the said rods,

page_text: e² is a piece on the central transverse piece of the frame to support the 2 rods.
e are the 2 stop pieces.
e are the pawls of the stop pieces engaging into the ratchet teeth.
e a spring on each stop piece to throw the pawl into gear.
e
ratchet teeth cut into the 2 rods.
e are handles at end of each rod.
emovable button to keep handle in position.
other position of the said movable button when the stop as shewn in Fig. 2
up, is to be turned down.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is :-
In a typewriter carriage frame of rectangular shape having two parallel longi-
tudinal walls, the combination with 2 inverted. V slots cut on the inside of said
walls, of ball containing cups attached to the printing carriage, forming bearings
for the same to travel up and down the carriage frame, the said ball cups having
each one large and a certain number of small balls the large ball running in the
V groove and being kept pressed inwards against the small balls by a flat spring,
all substantially as described and illustrated in the drawings annexed hereto.
In a typewriter carriage frame with a printing carriage as illustrated by draw-
ings see Figures 1 & 2, the use of 2 centrally placed adjustable stop rods with
ratchet teeth and stops carrying pawls as shewn, also the means for turning the
said stops up and down from either end.
Dated this Seventh day of June 1900.