An Improved Cam.
Year: 1894

page_text: Date of Application, 5th Apr., 1894
Complete Specification Left, 5th Jan., 1895-Accepted, 9th Feb., 1895
PROVISIONAL SPECIFICATION.
An Improved Cam.
1, WILLIAM HENRY LATHAM of Ridgway Gates, Bolton in the County of
Lancaster, Engineer and Machinist, do hereby declare the nature of my said
invention to be as follows:-
This invention relates to an improved cam which may be employed for many
purposes requiring an intermittent motion in machines for stamping soap, pressing
bricks, printing, and the like. This cam is constructed of two or more movable
circular inclines pivoted to the midfeather of a wheel or disc and operated by
projections, levers, links, and the like from other discs actuated by spur or other
wheels gearing into a pinion mounted on a shaft or centre carrying the main wheel
or disc. The circular inclines are so arranged that they will operate a bowl or
bowls on a rotating cylinder and the like, and then allow the same to pause as
required in machines before mentioned.
Dated the 4th April 1894.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.
An improved Cam.
I WILLIAM HENRY LATHAM of Ridgway Gates, Bolton, in the County of
Lancaster, Engineer and 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 and accompanying
drawings:-
My said invention relates to an improved cam capable of being used for many
purposes, requiring an intermittent motion, as for example in machines for stamping
soap, pressing bricks and the like.
The improved cam will be best understood from a consideration of the attached
sheet of drawings.
Fig. 1 is a face view of the disc and attached cam scroll.
Figs. 2 and 3 are similar views of the cam in different positions.
Fig. 4 shows the back of the cam disc illustrating the gear for working the
auxiliary cams x a¹ (Fig. 1).
Fig. 5 is a vertical section of the cam disc.
It will be understood that the cam disc A is supported and driven in any
suitable manner so as to revolve at the required speed. It must also be premised
that the circles B represent bowls fixed on the end of, say the mould cylinder of a
soap stamping machine, although it will be evident that the invention can be
utilised in connection with other types of machines. The scroll cam, which is
shown black in the drawing for the sake of clearness, consists of five different
sections lettered respectively C¹ C³ ³ C4 C³. The sections C₁, C³ and C³ are

page_text: fixtures and are cast on or secured to the disc A. The sections C and C+ are
loose and are hinged at b to the disc A. These loose sections act as gates which
open as the disc A revolves so as to allow the bowls B to pass at times out of the
range of the cam scroll. The central fixed section C³ acts as a stop to arrest and
retain each bowl B as the mould cylinder intermittently rotates. The opening and
closing of the gate C2 is effected by the cam a while the opening and closing of the
gate C is done by the cam ¹. These cams revolve as they are carried round by
the disc A, their motion being derived from toothed wheels D fixed on their axes
and gearing with a central motionless wheel E (see Figs. 4 and 5) which may be
secured to a supporting pedestal or other fixed part of the machine. The cam
has a groove (see Fig. 1) which is occupied by a bowl F carried by an extension F¹
from the gate C2 and the cam a is so formed and timed as to throw the gate C³
open at the proper time so as to let a bowl B pass clear (as for example in Fig. 2)
and to close it again so as to act upon a fresh bowl beneath the centre as appears
for instance in Fig. 3. In the same manner the cam a' is formed and timed so as
to operate the gate C* by means of the links G G¹.
A bowl at the junction of the two links enters a groove in the cam a as seen in
Fig. 1. By this means motion is imparted to the gate C which is thereby held
closed as in Figs. 1 and 2 or thrown open to allow the passage of a bowl B as in
Fig. 3. The cams and are shown in Fig. 1 only and are left out of Figs. 2
and 3 so as to simplify the drawing.
The
The action of the improved cam will be best understood by following it through
an imaginary rotation. For example in Fig. 1 a bowl B has been stopped and
retained by the stop C³ the gates C² and C being closed. The continued
rotation of the disc A brings it next into the position shown in Fig. 2.
Here it is necessary that the bowl B immediately beneath the upper part of
the scroll should be allowed to pass freely. Therefore the gate C2 has been
thrown open so as to clear the bowl. Further rotation of the disc A brings it into
the position shown in Fig. 3. Here it will be seen that for the first time the
cylinder carrying the bowls B is being moved in the direction of the arrow.
gate C2 has now been reclosed and is acting upon a bowl B so as to turn
the cylinder. At the same time the stop C has been carried round beneath the
imprisoned bowl which latter is now free to move round, passing through the opened
gate C of the scroll. The continued rotation of the disc A and scroll lifts the
next bowl, but when the bowl reaches the centre of the disc A it encounters the
stop C which has again been turned out into the position shown in Fig. 1.
The stamp or press or mould cylinder is thus arrested and held for the requisite
space of time with the greatest exactitude and certainty so that the descending
stamps or rams will find the moulds with absolute precision.
Instead of operating a moulding cylinder as described the invention might be
applied to the reciprocation or intermittent moving of a flat body or table.
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
claim is.
1. The improved cam for effecting intermittent or reciprocating motion in
mechanism, substantially as described and illustrated.
2. A cam for effecting intermittent or reciprocating motion in mechanism and
consisting of a scroll carried on a disc and having hinged gates or sections,
positively operated from auxiliary cams or discs, the whole acting in conjunction
with bowls or projections from a cylinder or other body to be operated, substantially
as described and shown.
3. The improved cam for effecting intermittent motion in soap stamping, brick
pressing and similar mechanism, the operative part consisting of a scroll or cam
having hinged clearing sections or gates positively operated by auxiliary cams or
dises the inner curl of the scroll acting as a stop to arrest and retain and release in

page_text: succession the bowls or projections on the cylinder or other body to be moved,
substantially as described and as shown.
Dated the 4th day of January 1895.
EDMUND CHADWICK,
Agent.