An Improved Starting and Stopping Motion, particularly adapted for Paper Cutting Machines.
Year: 1891

page_text: Date of Application, 17th Mar., 1891
Complete Specification Left, 2nd Dec., 1891-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improved Starting and Stopping Motion, particularly adapted
for Paper Cutting Machines.
WILLIAM CROSLAND New Street Miles Platting Manchester Machinist do
hereby declare the nature of this invention to be as follows:-
On the end of an horizontal shaft I fix a crank or disc in which is a stud which
travels round with a continuous motion, the throw of this stud should be about 1 times
the distance of the motion required by the knife or other apparatus; The knife
is mounted in the ordinary way & to one end is attached a connecting rod with an
intervening lever if required, the other end of this connecting rod is loose with a
hollow to fit one side of the crank stud, the connecting rod is so arranged that by
raising it slightly it comes into the aubit of the revolving stud when approaching
the lowest part of its motion, the stud strikes the hollow part of the connecting rod
& pushes it forward & by so doing forces down the knife through the paper or
other material required to be cut, the knife is then brought back to its original
position by a strong spring or weight, which spring or weight have also a tendency
to keep the hollow end of the connecting rod against the stud, but as the motion of
the crank stud is greater than that of the end of the connecting rod it leaves the
hollow & allows the connecting rod to drop to its original position, ready to be
raised again when another cut is required. do not confine this invention to paper
cutting machines but apply it to any machines that require an instantaneous
starting & stopping motion.
Dated this 16th day of March 1891
WILLM. CROSLAND.
COMPLETE SPECIFICATION.
An Improved Starting and Stopping Motion, particularly adapted
for Paper Cutting Machines.
WILLIAM CROSLAND New Street Miles Platting Manchester Machinist 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 :-
My invention relates to a new method of starting & stopping a machine & is
most applicable to those machines which require an intermittant motion, that is to
move & stand alternately such as cutting machines printing machines & embossing
machines. That this invention may be better understood I have annexed drawings
illustrative of my improvements which I now describe with the assistance of
letters of reference marked thereon.
A is an horizontal shaft on the end of which is a disc or crank B with stud or
crank pin K revolving round continuously in the direction shown by the arrow, this
crank pin is shown in 3 different positions KI K 2 & K 3. C is a lever fixed to
frame of machine by stud D on which it oscillates, the upper end is attached by
any convenient method to casting E bearing a knife marked F, in that casting are
2 diagonal slots G 1 & G 2 mounted on 2 studs H 1 & H 2 which are fixed in frame
of machine, to the lower end of lever C is attached a connecting rod I which moves
freely on a joint J, the dotted lines show the lever in different positions I 2 & I 3
when the machine is at rest this connecting rod is in position I 1, L is a lever with
treadle at one end also fixed on a stud N on which it oscillates freely, but always
takes position shown when at rest, M is a spring attached to lever C & strong

page_text: enough to maintain it in position shown when machine is at rest. The mode of
operation is as follows, when the operator wishes to start machine he places his foot
on the treadle L this comes in contact with connecting rod I & raises it to
position 12 with its hollow end immediately in the orbit of crank pin K 1 which is
revolving in direction shown by arrow & by coming in contact with the hollow end
of connecting 1od 12 forces it back moving it the same time lever C & casting E
which bears knife F, making a clean cut through the material placed under it,
when the stud K reaches the position marked K 2 the material is cut through &
the spring M comes into action & draws the knife back to its original position at
the same time pressing rod I against pin K till it reaches position I 3, when lever C
coming to rest pin K continues to move in the direction of K 3 the rod I is allowed
to drop to its original position & remains at rest till another cut is required.
Another application of my invention for punching embossing &c. is shown on
Figure 2 where A & B represent top & bottom platten of a press, I is the con-
necting rod moving easily on a joint J which connects it to platten B, D is a
weight attached to connecting rod I, K is a revolving pin moving in the orbit a. b. c
shown by dotted lines & in the direction shown by the arrow, L is a lever with
treadle or handle as prefered one end of which is in contact with connecting rod J,
the action is as before, press down the treadle or lever L against connecting rod I
which brings the hollow end into the orbit of revolving pin K which forces up the
connecting rod I also platten B, pressing embossing or otherwise acting upon
material placed between, as the pin K still moves round the connecting rod I is
forced down by the weight of the platten B, when the pin K gets to the position 2
the connecting rod I is released & is moved by the weight B back to its original
position where it remains until another operation is required. I wish it to be
understood that I do not confine myself to these particular forms of application as
it may be used in a great variety of ways for a great many different purposes.
What I claim is
The use of a revolving stud or crank pin which can be brought into contact
with connecting rod at the will of the operator in the manner here described.
D
1001
WILLIAM CROSLAND.