Improvements in Grinding Rollers for Grinding the Wire Card Surfaces of Carding Engines.
Year: 1892

page_text: Date of Application, 7th Dec., 1892
Complete Specification Left, 30th Aug., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Grinding Rollers for Grinding the Wire Card
Surfaces of Carding Engines.
I JOSEPH STANDRING DRONSFIELD of the Firm of Dronsfield Brothers
Limited, of The Atlas Works, Oldham, in the County of Lancaster, Card
Grinding Machine Makers, do hereby declare the nature of this invention to be
as follows:-
My invention relates to the well known type of card grinding rollers having in
each case a boss or short grinder which travels to and fro upon a shaft whilst
revolving with the shaft this travelling motion being effected by a right and left
hand screw mounted within the shaft. The connection of the screw with the boss
is effected by means of a swivel fork which engages with the grooves of the screw.
As hitherto constructed this fork has been mounted so as to have only one
movement namely a movement partly around an axis at right angles to the
axis of the screw. As the boss has travelled to and fro the penetration of the
fork into the screw grooves has varied more or less principally by reason of
the slight sagging of the screw. This I consider to be a defect as the hold of the
fork has been lessened and the wear of the same has been increased.
To remedy this defect I mount the fork so that its shank is free to slide in its
bearing and
apply a spiral spring or a suitable spring which tends to press the
fork toward the screw. The fork is thus kept pressed fully home into the screw
grooves so that the full benefit of the bearing and wearing surfaces of the fork is
obtained the result being the obtainment of increased durability and steadiness of
action.
Dated this 6th day of December 1892.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.
COMPLETE SPECIFICATION
Improvements in Grinding Rollers for Grinding the Wire Card
Surfaces of Carding Engines.
I JOSEPH STANDRING DRONSFIELD of the Firm of Dronsfield Brothers
Limited, of The Atlas Works, Oldham, in the County of Lancaster, Card
Grinding Machine Makers, 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 invention relates to the well known type of card grinding rollers having in
each case a boss or short grinder which travels to and fro upon a shaft whilst
revolving with the shaft this travelling motion being effected by a right and left
hand screw mounted within the shaft. The connection of the screw with the boss
is effected by means of a swivel fork which engages with the grooves of the screw.
As hitherto constructed this fork has been mounted so as to have only one move-
ment namely a movement partly around an axis at right angles to the axis of the
screw. As the boss has travelled to and fro the penetration of the fork into the
screw grooves has varied more or less principally by reason of the slight sagging of
the screw. This I consider to be a defect as the hold of the fork has been lessened
and the wear of the same has been increased.
To remedy this defect I mount the fork so that its shank is free to slide in its
DQ11

page_text: bearing and I apply a spiral spring or a suitable spring which tends to press the
fork toward the screw.
The manner in which I have applied the said spring in practice is illustrated
by the accompanying drawing which represents a cross section through the boss and
shafts of a travelling boss grinder as constructed by my firm.
In the said drawing a is the fork the central screw shaft c the hollow shaft and
d the travelling boss.
The shank a' of the fork is fitted to swivel and also to slide in a hole bored in the
parte which is seated in the boss and serves as a key to connect the boss with
the shaft e as is well understood. Between the end of the shank and the bottom
of the hole I interpose a spiral spring which tends to thrust the shank outward
and thereby keeps the fork in contact with the bottom of the groove in the screw
shaft.
The fork is thus kept pressed fully home into the screw grooves so that the full
benefit of the bearing and wearing surfaces of the fork is obtained the result being
the obtainment of increased durability and steadiness of action.
The form of the key e and the method of seating the same in the boss may be
varied.
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 spring applied in the manner and for the purpose set forth and
indicated.
2. In grinding apparatus of the indicated type fitting the shank of the fork to
slide in its bearing in addition to the ordinary swivel action and applying a
spring to keep the fork in contact with the bottom of the groove in the screw
shaft.
Dated this 29th day of August 1893.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.