Improved Means for Straightening the Teeth of Garnett-toothed and like Cylinders.
Year: 1890

page_text: Complete Specification Leit, Tom Recepten, TULII vall
COMPLETE SPECIFICATION.
7037
Improved Means for Straightening the Teeth of Garnett-toothed and
like Cylinders.
1, FURGUS OSWAL GROVES, of Newton Lower Falls, in tho County of Middlesex
and State of Massachusetts, United States of America, Gentleman, do hereby declare
the nature of my invention for "IMPROVED MEANS FOR STRAIGHTENING THE TEETH
OF GARNETT-TOOTHED AND LIKE CYLINDERS," 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 devices for straightening the teeth of burr-cylinders, burr-
doffers, &c., and particularly cylinders employed in what commonly is known as
"Garnett machines."
As is well known to those skilled in the art, the teeth of the cylinders of the
machine mentioned after considerable use become hent, and to straighten the same it
is usual for workmen to draw out the shank of an old file or other piece of metal, and
running the cylinder backward place the said piece of metal between the line of teeth,
so that the contact of bent teeth therewith will result in bending such displaced teeth
back to place.
It is usual in the construction of burr-cylinders to form grooves in the face of the
cylinder running in a slightly spiral direction around the cylinder and to insert
strips of metal having saw-teeth on their outer edges in the said grooves. The said
grooves are usually formed in pairs, and the tooth strips are secured in the grooves in
pairs, so that in the operation of straightening the teeth with the shank of a file, as
before described, the file shank would pass through only every other space existing
between the rows of teeth, and the cylinder would have to be "gone" over a secondi
time, and then with quite unsatisfactory results. With any of the process and means
prior to my invention, so far as I am aware, the work of straightening or repairing
the teeth of burr-cylinders has been tedious and imperfect.
By my invention the difficulties and objections above noted are entirely overcome.
The invention will first. be described in connection with the accompanying drawings,
and letters of reference marked thereon, forming a part of this Specification, and then
be pointed out in the claims.
In the drawings,
Figure 1 is a side elevation of a toothed cylinder, showing the manner of using my
invention to straighten the teeth in the periphery of the same.
Fig. 2 is a top plan view of the same.
Fig. 3 is a sectional view of my improved device on the line 3, 3 of Fig. 2, the
handle being shown in elevation.
Fig. 4 is a similar view, the section being taken on the line 4, 4 of Fig. 1.
In the drawings,
a designates the handle of my improved tooth straightener, the forward end
of which is provided with a socket b, in which are placed a number of steel
blades beveled on their outer ends, as shown in Fig. 3, said blades being of a

page_text: width to adapt them to enter the spaces existing between the lines of teeth formed on
the cylinder d of a burring or other like machine.
e designates strips of metal similar to the blades c, which strips e do not extend out
as far as the blades c, so that when the device is placed in the position in which it is
represented in Figures 1 and 2 the ends of the spacing strips e will not strike the
points of the teeth of the cylinder.
There may be three or more blades cand a corresponding number of spacing strips e
secured in the handle, said blades and strips being herein shown as secured in place in
the socket by means of thumb-screws at the sides, and a thumb-screw g bearing
upon their upper edges, as best seen in Figures 3 and 4.
In use my device will be placed on a suitable rest in such position that the blades e
will extend between the rows of teeth of the cylinder, and upon the latter being
revolved backward such teeth as are bent out of proper line or position will engage
the device and be moved or bent back into place.
In instances where the teeth on the cylinder are in spiral form the blades will be
caused to follow the spaces between the teeth from one end of the cylinder to the
other in a well known manner.
In case the toothed cylinder is made upon a series of disks, as is sometimes done, it
will be necessary, after straightening one or more rows of teeth around the cylinder,
to remove the device from contact with said teeth and place it in position between the
next two or more rows of teeth.
It is obvious that various devices may be contrived for securing the blades e in
proper position; hut that herein shown has been found by me to prove effective
for the purpose.
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. A device for straightening the teeth of burr-cylinders, burr-doffers, &c., consisting
of a handle or support and a plurality of blades c, adapted to pass the spaces existing
between the lines or rows of the teeth of the cylinder as the latter is revolved, substan-|
tially as set forth.
2. A device for straightening the teeth of burr-cylinders, burr-doffers, &c., a handle
provided with a socket, alternate blades c, and spacing pieces e, secured in the said
socket, as set forth.
Dated this 6th day of November A.D. 1990.
A
FURGUS OSWAL GROVES.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.