Improvements in Printing Telegraphs.
Year: 1889

page_text: Date of Application, 11th Feb., 1889
Complete Specification Left, 8th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Printing Telegraphs.
We, JOHN EDWARD WRIGHT, of No. 18 Southampton Street, Bloomsbury, London,
Electrician, and JOHN MOORE, of No. 95 Barry Road, East Dulwich, in the
County of Surrey, Journalist, do hereby declare the nature of this invention to be
as follows:-
Type wheel shafts of column printing telegraphs along which the type wheel is
traversed have been made of various forms, all of which involve considerable
detrimental friction. We so form the shaft that the type wheel slides along its
length on two or more knife edges. This form not only eliminates friction but
possesses the added advantage of lightening the shaft in a marked degree.
A knife edge bar is also used whereon to slide the mechanism which propels the
type wheels along its axis. Small rollers may also be used running on these knife
edges if necessary. These knife odges while allowing great free.lom of motion in the
desired direction prevent periphery shake during the operation of printing to a greater
extent than previous devices.
Date this 11th of 1080
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Printing Telegraphs.
We, JOHN EDWARD WRIGHT of No. 18 Southampton Street, Bloomsbury, London,
Electrician, and JOHN MOORE of No. 95 Barry Road, East Dulwich in the County of
Surrey, Journalist, 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 :-
Type wheel shafts of column printing telegraphs along which the type wheel is
traversed have been made of various forms, all of which involve considerable
detrimental friction. We so form the shaft that the type wheel slides along its length
on two or more knife edges. This form not only eliminates friction but possesses the
added advantage of lightening the shaft in a marked degree.
A knife edge bar is also used whereon to slide the mechanism which propels the
type wheel along its axis. Small rollers may also be used running on these knife
edges if necessary. These knife edges while allowing great freedom of motion in the
desired direction prevent periphery shake during the operation of printing to a greater
extent than previous devices.
Our improvements are shown as applied to the machine described in the Specifi-
cation lodged with our application for Patent No. 10437 in the year 1888.
Figure 1 is a vertical cross section of the frame of the machine together with the
type wheel shaft and the bar along which slides the carriage by which the type wheel
is propelled along its shaft. Figure 2 is a front view.
A is the type wheel shaft having upon it the pinion A' by which it is driven and
the escape wheel A' by which its rotation is controlled. B is the type wheel capable
of being slidden along the shaft. U is the carriage by which the type wheel is so
slidden. The carriage slides along the fixed bar D which is parallel with the type wheel
shaft-it may be caused to slide to and fro along the bar in the manner described in
the specification above mentioned. The carriage has an arm C' standing up from it
and a fork on this arin enters a groove cut around the circumference of the boss of
the type wheel. It also carries the inking roller E as heretofore.

page_text: The type wheel shaft A and the fixed bar D have each three V or knife edges
standing out from thom as shown. The type wheel has three corresponding grooves
cut in it as shown clearly in the cross section Figure 3 which is on a larger scale.
The arm which is at one end of the carriage C has similarly three V grooves
cut in it to correspond with the knife edges on the lar-the carringe itself may be
bored to a diameter to fit to the outer extremities of the knives as shown in the cross
section, Figure 4.
Any slight divergence from parallelism that there may be between the bar D and
the type wheel shaft has no tendency to increase the friction between the wheel and
its shaft or the carriage and the fixed bar as the wheel and carriage are not rigidly
connected.
At Figure 5 is shewn a way in which the type wheel may be made to carry small
rollers to run on the knife edges of the type wheel shaft.
Figure 6 shows how the knife edges might be on the wheel and grooves formed
along the shaft.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to he performed we declare that we
claim is:-
1. The construction of the type wheel shafts of column printing telegraphs with
two or more longitudinal V or knife edge projections or grooves for corresponding
grooves or projections on the type wheel to bear upon to reduce friction and
peripheral shake during the operation of printing.
2. The combination of the type wheel shaft having longitudinal V or knife edge
projections or grooves, the type wheel with corresponding grooves or projections,
the carriage sliding upon a bar similarly formed with projections or grooves and the
arm from the carriage entering a groove ent around the circumference of the type
whool.
nL CAL
JOHN EDWARD WRIGHT.
JOHN MOORE.