Improvements in and relating to Hand-guards for Platen Printing Machines.
Year: 1897

page_text: Date of Application, 20th Aug., 1897
Complete Specification Left. 20th May, 1898-Accepted, 6th Aug., 1898
Improvements in and relating to Hand-guards for Platen Printing
Machines.
I, GEORGE ARTHUR PINDAR, of 45, St. Thomas Street, Scarborough, in the County
of York, Printer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a rising guard or rail, which, operating automatically,
prevents an attendant from allowing his fingers to remain too long for safety
between the platen and the type, when contact between these two surfaces is
imminent.
For this purpose we employ a rail or cross-bar carried by the upper ends of two
rods which pass through guides fixed against the underside of the platen.
The lower end of each of these rods is connected by a joint to the outer eye of a
short flat link, the inner eye of which is secured rigidly to the reciprocating end
of one of the levers which raise the slide-blocks for pressing home the platen.
The links referred to are secured to the slide-block levers by the same pins
which connect the levers to the blocks the heads of the pins holding the links in
the required position.
As the platen approaches the type, for the purpose of taking an impression, the
rods supporting the guard or rail begin to rise, and by the time the two opposing
surfaces are nearly in contact, the said guard or rail has risen sufficiently to have
removed from danger the hand or fingers of the attendant who has been placing
the paper in position upon the platen.
WILLIAM J. BAKER,
Peasholme House, Scarborough, Agent for the Applicant..
Improvements in and relating to Hand-guards for Platen Printing
Machines.
I, GEORGE ARTHUR PINDAR, of 45, St. Thomas Street, Scarborough, in the
County of York, Printer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to a rising guard or rail, which, operating automatically,
prevents an attendant from allowing his fingers to remain too long for safety
between the platen and the type, when contact between these two surfaces is
nminent

page_text: For this purpose we employ a rail or crossbar carried by the upper ends of
two rods which pass through guides fixed against the underside of the platen.
The lower end of each of these rods is connected by a joint to the outer eye
of a short flat link, the inner eye of which is secured rigidly to the reciprocating
end of one of the levers which raise the slide-blocks for pressing home the
platen.
The links referred to are secured to the slide-block levers by the same pins which
connect the levers to the blocks the heads of the pins holding the links in the
required position.
As the platen approaches the type, for the purpose of taking an impression, the
rods supporting the guard or rail begin to rise, and by the time the two
opposing surfaces are nearly in contact, the said guard or rail has risen
sufficiently to have removed from danger the hand or fingers of the attendant
who has been placing the paper in position upon the platen.
In the drawings hereunto annexed:―
Fig. 1 is a part front elevation of a platen printing machine with this inven-
tion applied.
Fig. 2 a part side elevation.
Figs. 3 and 4 are respectively an enlarged elevation and plan of top rail or
cross bar.
Figs. 5 and 6 are respectively enlarged elevations of side rods and links.
Figs. 7 and 8 are respectively an enlarged elevation and a plan of guide
brackets.
A is the platen mounted in bearings B upon the framework C. A radial
reciprocating motion is imparted to the platen A through the slide blocks D,-
working in the slides E at the back of the platen, by levers F mounted in
bearings G on the framework C to which a radial reciprocating motion is imparted
in the ordinary manner.
All the above described parts may be of ordinary construction and operate
in the usual manner.
H is the top rail or cross bar hereafter termed the top rail, which is carried, as
shown at Fig. 1, by the upper ends of the side rods I which pass through the
guides J, which are shown in the drawings in the form of brackets fixed, so as to
be capable of adjustment in the slot holes j, to one of the cross stays a at the back
of the platen.
The lower end of each of the rods I is connected by a joint i to the outer eye of
a short flat link K, the inner eye of which is secured rigidly to the reciprocating
end of one of the levers F, which raise the slide-blocks D for pressing home the
platen A for simultaneously imparting a vertical reciprocating motion to the top
rail.
The links K just referred to are secured to the slide-block levers by the same
pins which connect the levers F to the blocks D the heads of the pins holding the
links in the required position with keys f which pass into the keyways k in eyes
of the links K.
To attach the top rail H, take out the studs f at the back of the platen A, and
fix on the links K (straight side to be inside), taking care that the small grooves k
therein fit on the keys on the studs; replace the studs, put on the washers f¹
before putting on the nuts f2 and tighten up.
Bolt the guides J (which are respectively made for the right and left hand) in
the holes usually found on the cross stay a of platen, as shown at Fig. 1, and
fasten on the top rail H; turn the machine slowly round to see that all is clear
before starting.
Should there be no holes in the cross stay, it will be necessary to drill one at
each side at suitable distances from the edge of platen and the back of same.
As the platen A approaches the type, for the purpose of taking an impression,
the rods I supporting the top rail H begin to rise, and by the time the two
opposing surfaces are nearly in contact, the said top rail has risen sufficiently to

page_text: have removed from danger the hand or fingers of the attendant who has been
placing the paper in position upon the platen A.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claims
A hand guard for platen printing machines consisting essentially of a top rail
carried by the upper ends of two side rods working through guides adjustably
fixed to the back of the platen, said side rods being jointed to links attached to
the slide blocks of the machine so as to be operated simultaneously with and by
the same moving parts that actuate the platen, all of said parts being arranged and
combined substantially as herein set forth and illustrated in the annexed drawings.
Dated this Nineteenth day of May 1898.
GEORGE ARTHUR PINDAR.
By W. Fairburn-Hart,
Agent.