Improvements in Apparatus for Grinding the Flats of Revolving Flat Carding Engines.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Grinding the Flats of Revolving
Flat Carding Engines.
I, SAMUEL MILLS of 51 Starkey Street Heywood, in the County of Lancaster
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 :-
The object of this invention is to grind the flats of a carding engine off the
working surface in such a manner, that whilst their working surfaces are passing
over a suitably constructed block, the surfaces of the wire cards will be ground
to the required bevel by the grinding roller being retained at an equal pressure in
contact with the surface of the card teeth, until the rear edge of the wires is clear
of the grinding roller.
I attain this object by the means hereinafter described and as illustrated in the
accompanying three sheets of drawings, in which Fig. 1 is side view of portion of
a carding engine with my invention applied and Fig. 2, is a front view of part
of the same.
In these views similar letters refer to similar parts.
;
In this invention I place a cam wheel a on to the back shaft b I form
projections a on the periphery or edge of said cam wheel, the length of each
projection corresponding to the traverse of one of the flats g.
The base a of the projections a¹ on the edge of the aforesaid cam wheel a,
are shaped so as to allow a bowl e to travel thereon, and to mount the projections
without friction as said wheel is revolved in the direction indicated by arrows in
Fig. 1. The bowl cis connected to the free end of the lever d, the opposite end
of said lever being attached to the bracket j. The shaft which is placed across
the machine is supported at each end by a bracket that is attached to the
stationary bend o. The aforesaid bracket is pivotted on and near the end of said
shaft, and a like bracket is placed at the opposite end of the same shaft. These
brackets, of which a side and front view are shown in Figs. 1 and 2 drawn to
enlarged scale, support the bearings for carrying the grinding roller f, said
bearings being adjustable by means of the stud v, and are fitted thereto by a bolt
or set screw 10. The cam wheel a is carried on the same shaft as the star wheel e
and is thereby caused to revolve at the same speed as said star wheel.
As a chain of flats g travels in the direction of the arrows shown in Fig. 1. each flat
is successively brought, card teeth upwards, under the grinding roller f, which is
lifted in position at the commencement of the forward movement of the flat by the
bowl mounting one of the projections a¹ which thereby raises the free end of
the lever d, and in consequence of the centre of the shaft being placed at an
acute angle relatively with the centre of the shaft k which carries the grinding
roller when the lower end of the lever d is raised the grinding roller is
also raised.
The bowl c travels along the reduced diameter of the wheel a, as said wheel
revolves until it reaches the next point a³, when the card teeth m will have
passed clear of the grinding roller. The bowl then mounts the succeeding
projection a thereby causing the lever d to again raise the grinding roller f,
and at the same time the succeeding flat is brought into position for contact
therewith.
The flats which are pressed upwards with their wearing surfaces against the
convex surface of the block h, by the weighted lever g, have said wearing surfaces n
formed with a bevel as represented in Fig. 3, which shows an end view of a flat

page_text: drawn to an enlarged scale; o is the stationary bend with flange, and p is the cone
ring on which the flats travel.
By the means herein before described the surface of the card teeth is ground to
the required bevel, and exactly parallel to the plane surface n of the flat.
The luga, in which the set screw is fitted, enables the bracket j to be kept
stationary when the lever d is removed.
In a modification of my invention, I form the bearing t so as to slide on the
bracket as shown in Fig. 4 with the base of said bearing resting on an arm y
or its equivalent that forms a part of the bracket j', by which means the lever d
can raise or lower the grinding roller without being connected with the bracket
carrying said roller.
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 :-.
In apparatus for grinding the flats of revolving flat carding engines.
1st. The means employed for alternately raising and lowering the grinding
roller by the combination of a cam such as a, a lever d, and the mechanism
connected therewith, in the manner and for the purpose substantially as hercin
before described.
2nd. The manner of raising and lowering the grinding roller by the acute angle
at which the fulcrum is placed relatively with the centre of the grinding roller
substantially as herein before described.
3rd. The manner of raising and lowering the grinding roller by the lever and
sliding bracket herein before described.
Dated this 8th day of Santember 1009
THOMAS PRESCOTT,
53,Arcade Chambers, St. Mary's Gate, Manchester, Agent for Applicant.