Improvements in Type Writing Machines.
Year: 1894

page_text: Date of Application, 15th Oct., 1894
Complete Specification Left, 15th July, 1895-Accepted, 17th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Type Writing Machines.
We NORTH'S TYPE WRITER MANUFACTURING COMPANY LIMITED of
3 Gracechurch Street Manufacturers of Type Writing Machines and MORGAN
DONNE of 57 Hatton Garden Manager of the Works of the said Company, both
in the County of Middlesex do hereby declare the nature of this invention to be as
follows:-
The invention relates to improvements in type writing machines and has for its
objects to form the paper carriage in such manner that it will be lighter more rigid
and cheaper to produce than heretofore and to mount the paper carriage and
couple it with the shifting bar in such manner that it will be more truly guided
and better supported than heretofore, so that there will be no possibility of its
springing when in its extreme position and throwing the printing point out of
proper alignment whilst at the same time it will travel more smoothly and with
greater steadiness.
In carrying the invention into effect in lieu of forming the bars constituting part
of the frame of the paper carriage of solid bar metal formed to the required shape
by means of cutters as heretofore according to the present invention such bars are
formed of sheet metal stamped into an M (having the angles rounded) or other
suitable section by which means a bar of great stiffness is obtained at a nominal
cost and in the same manner the end plates or other parts of the carriage may be
formed of comparatively light metal stamped into a corrugated or other suitable
form in transverse section.
The carriage is furnished with two grooved bars running longitudinally thereof
at the front and back and these bars which are preferably formed in the manner
hereinbefore described and of a similar section are grooved or arranged with their
grooves longitudinally upon opposite vertical faces and two transverse girders of
the frame of the machine located at the front and rear of the carriage are similarly
grooved whilst in these grooves are fitted two or more hard steel balls suitable
stops being provided at the ends of the grooves to prevent the balls working out
of place.
Beneath the lower edge of the grooved bar at the front of the paper carriage
and carried by the corresponding girder are arranged just clear of the lower edge
of the grooved bar two rollers the office of which is in the event of any undue
pressure being put 'upon the paper carriage to further assist to support the same
and prevent it unduly springing.
In order to support and guide the carriage in its to and fro motion to shift the
printing point each end plate of the carriage is at each extremity formed with a
horizontal slot or groove and a girder extending across the frame of the machine
is formed with corresponding short grooves or races provided with stops hard steel
balls being arranged in the races so as to enter the slots or grooves of the end plates
and thus permit of the necessary shitting movement whilst truly guiding and
steadying the carriage.
The shifting lever, that is to say the lever for moving forward the carriage so as
to shift the printing point usually carries a circular rod which is embraced by a
grooved bar resting thereon but this arrangement gives rise to considerable friction
and is therefore objectionable, but according to the present invention the grooved
bar is still retained but in lieu of the circular rod carried by the shifting lever a

page_text: second grooved bar is substituted and the two grooved bars which are internally
furnished with stops are so arranged that altogether they form a race for several
balls which form the connection between the two bars and thus the necessary
coupling is obtained between the carriage and the shifting bar with the least
possible friction in the traversing of the carriage.
By the means hereinbefore described the paper carriage is caused to travel with
greater facility and truth and by reason of the steadiness with which it is held the
printing is much improved.
Dated this 15th day of October 1894.
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.
Improvements in Type writing machines.
We NORTH'S TYPE WRITER MANUFACTURING COMPANY LIMITED of
3 Gracechurch Street, Manufacturers of Type Writing Machines, and MORGAN
DONNE of 57 Hatton Garden Manager of the Works of the said Company, both
in the County of Middlesex do hereby declare the nature of this invention and in
what manner the same is to be perfornied to be particularly described and ascertained
in and by the following statement :-
The invention relates to improvements in type writing machines and has for its
objects to form the paper carriage in such manner that it will be lighter, more
rigid and cheaper to produce than heretofore, and to mount the paper carriage and
couple it with the shifting bar in such manner that it will be more truly guided and
better supported than heretofore, so that there will be no possibility of its springing
when in its extreme position and throwing the printing point out of proper
alignment whilst at the same time it will travel more smoothly and with greater
steadiness.
In carrying the invention into effect in lieu of forming the bars constituting part
of the frame of the paper carriage of solid bar metal formed to the required shape
by means of cutters as heretofore according to the present invention such bars are
formed of sheet metal stamped into an M or other suitable hollow section, by which
means a bar of great stiffness is obtained at a nominal cost, and in the same manner
the end plates or other parts of the carriage may be formed of comparatively light
metal stamped into a corrugated or other suitable form in transverse section.
The carriage is furnished with two grooved bars running longitudinally thereof
at the front and back, and these bars which are preferably formed in the manner
herein before described of an M or they might be of other hollow section produced
by stamping are grooved or arranged with their grooves, longitudinally upon
opposite vertical faces and two transverse girders of the frame of the machine
located at the front and rear of the carriage are similarly grooved, whilst in these
grooves are fitted two or more hard steel balls, suitable stops being provided at the
ends of the grooves to prevent the balls working out of place.
Beneath the lower edge of the grooved bar at the front of the paper carriage and
carried by the corresponding girder are arranged just clear of the lower edge of
the grooved bar, two rollers the office of which is in the event of any undue
pressure being put upon the paper carriage to further assist to support the same
and prevent it unduly springing.
In order to support and guide the carriage in its to and fro motion to shift the
printing point each end plate of the carriage is at each extremity formed with a
horizontal slot or groove or grooved bar and a girder extending across the frame of
the carriage is formed or provided with corresponding short grooves or races
provided with stops hard steel balls being arranged in the races so as to enter the

page_text: thereof at the front and back and these bars which are preferably formed in the
manner hereinbefore described of an M section or they might be of other suitable
hollow section are formed with grooves b² therein arranged longitudinally upon the
outer and opposite vertical faces thereof and these longitudinally grooved bars are
fixed with the transverse bars 6 by means of angle brackets and screws or rivets
as shown more particularly at Figures 7 and 8 and the pawls of the escapement
mechanism are as shown in the same figures by the same means fixed with one of
the transverse bars b.
Two transverse girders c of the frame of the machine supported upon posts c¹
but located longitudinally of the carriage at the front and rear thereof are similarly
provided with grooves c and within the grooves are fitted two or more hard
steel balls d upon which the carriage travels for letter spacing, stops 6* * being
provided at the ends of the grooves in order to prevent the balls d working
out of place as shown more particularly at Figure 9.
at
For convenience three balls are employed, two arranged in the grooves
the rear of the paper carriage, and one located in such grooves at the front of the
paper carriage, but in this latter case the groove in the girder c at the front of
the carriage is formed for a correspondingly short distance in the centre thereof,
but is of sufficient length to admit of the proper traverse of the single ball d.
Beneath the lower edge of the grooved bar at the front of the paper carriage
and carried by the corresponding fixed girder care arranged just clear of the
lower edge of the grooved bar 6 two rollers & mounted upon studs or axes c, and
the office of these rollers is in the event of excessive pressure being brought to
bear upon the paper carriage to further assist to support the same and prevent it
unduly springing.
In order to support and guide the upper carriage in its to and fro movement to
shift the printing point each end plate as of the upper carriage is at each extremity
formed with a horizontal groove or race a formed in a short grooved bar of
steel a fixed therewith by rivetting and the end transverse fraines or girders b of
the lower carriage have fixed therewith corresponding short grooved bars b* formed
with grooves or races therein.
Stops for the balls are formed at one end by the flanges or rims a' of the end
plates, and at the other end of the race by the projecting head of a stud 67
screwed through the grooved bar into the transverse bar or girder band hardened
steel balls are arranged in the recess formed by the grooves a 6 so as to permit
of the necessary shifting movement of the upper carriage whilst truly guiding and
steadying the saine.
The shifting lever e, that is to say the lever moving forward the upper carriage
so as to shift the printing point usually carries at its upper end a circular rod which
is embraced by a grooved bar resting thereon, but this arrangement gives rise to
considerable friction and is therefore objectionable; according to the present
invention however the grooved bar a³ which is fixed with the upper carriage is
still retained, but in lieu of the circular rod hitherto carried by the shifting lever e a
second grooved bar e is substituted therefor, and the two grooved bars which are
internally furnished with stops a** 1* are so arranged that together they form a
race for several balls & which constitute the connection between the two bars a³, e',
and thus the necessary coupling is obtained between the upper carriage and the
shifting bar e with the least possible friction in the traversing of the compound
carriage.
By the means herein before described the paper carriage is caused to travel with
greater facility and truth, and by reason of the steadiness with which it is held the
printing is much improved.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In a type writing machine a paper carriage composed of bars and plates of sheet

page_text: metal stamped up to an M or other suitable hollow section substantially as herein
shown and described.
2. In a type writing machine a paper carriage formed with end plates of sheet
metal stamped into a corrugated or other suitable hollow form substantially as
herein shown and described.
3. In combination with a type writing machine a paper carriage formed upon
the front and rear thereof with longitudinal bars of sheet metal stamped into
an M or like section so as to provide grooves in opposite vertical faces, corre-
spondingly grooved girders, carried by the frame of the machine, steel balls located
in the grooves and forming ball bearings and suitable stops to control the balls
substantially as herein shown and described.
4. In a type writing machine a paper carriage formed in two parts an upper
carriage and a lower carriage such parts being mounted with capability of
longitudinal and transverse movement upon ball bearings substantially as herein
shown and described.
5. In a type writing machine a paper carriage mounted upon ball bearings and
provided with auxiliary supporting rollers normally held clear of the carriage but
adapted to afford a bearing thereto upon the exercise of undue pressure substantially
as herein shown and described.
6. In a type writing machine a paper carriage a shifting lever, a grooved bar
carried by the shifting lever, a corresponding bar fixed with the carriage and a ball
or balls located in such grooves substantially as herein shown and described.
Dated this 15th day of July 1895
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.