IMPROVEMENTS IN SHODDY PICKERS
Year: 1883

page_text: LETTERS PATENT to Sydney Pitt of Sutton in the County of Surrey for an
Invention of "IMPROVEMENTS IN SHODDY PICKERS " cominunicated to lim
from abroad by Charles Stephen Dodge of Lowell in the County of Middlesex
and State of Massachusetts United States of America
COMPLETE SPECIFICATION filed by the said Sydney Pitt at the Office of
the Commissioners of Patents on the 23rd October 1883.
SYDNEY PITT of Sutton in the County of Surrey "IMPROVEMENTS IN SHODDY
PICKERS" communicated to me from abroad by Charles Stephen Dodge of
Lowell in the County of Middlesex and State of Massachusetts United States of
America
This Invention consists in an improved form of pin or picker which is to be
secured in a suitable lag and mounted on the cylinder of a shoddy picker.
The purpose of the invention is to devise a picker which will act upon the
material in a most efficient manner with a minimum driving power. With this
object in view u picker has been devised possessing peculiarities of structure and
operation which are fully set forth below.
Before proceeding to a description of the invention, however I desire to state
that I am aware that flat pickers are old and that round tapering pickers formed
with round or square shanks to secure them in the lag are also old; and I do not
desire therefore, to be understood as including broadly such devices within the
Scope of the invention.
In the accompanying Drawings.
Figure 1 is an elevation of one form of the improved picker looking at the
edge of its blade;
Figure 2 is a side view of the same,
Figure 3 represents cross sections of the picker on the lines a. a and b. b. of
Figure 1.
Figure 4 is an elevation of another form of the improved picker looking at the
edge of its blade.
L
1114

page_text: Figure 6 represents cross sections of the picker on the lines c, c and d, d, of
Figure 4 and,
Figure 7 is a plan view of a portion of a lag with pickers arranged therein.
Referring to Figures 1 and 2 the picker A is preferably formed with a head and
has a shank a. which may be either round or square but which in this instance is
represented as being round.
The blade b of the picker or that part which projects from the lag and operates
upon the material is formed by "hollow" or concave inclines which extend from
the shank of the picker to its point. The faces of these hollow or concive inclines
are preferably convex on transverse lines, as is illustrated by the black lines in
Figure 1 and the shading in Figure 2. By such a construction the pin as it wears
from contact with the material operated upon will approximately retain its shape
and edge, and can be driven through the inaterial with a minimum driving power,
cutting and tearing it in the most efficient manner.
In order to still further improve the operation of the pin, it is sometimes formed
with a diamond point, c, as clearly shown in the Drawing. As is well understood
by those familiar with this class of machines, the picker pins are secured in the
lags D by being forcibly driven into apertures therein. In order to firmly secure
the pins in the lags and hold them positively against turning so that the edges of
their blades will always be presented to the material in the proper manner, feathers
or ribs e are formed on the round shank of the pin. When the shank is angular
the ribs are of course not necessary. When the pin is driven into the aperture in
the lag these feathers take a firm hold in the sides of the aperture and hold
the pin.
In addition to this important function, however, there is another of importance.
As in practice pickers are often subjected to very severe strains, and as in order to
do efficient work, they must be made comparatively thin, there is a tendency for
the blade of the picker to bend about where the hollow inclines run out on the
shank, or at or about the point where the picker emerges from the face of the
lag. The ribs e. reinforce the picker at this point, and prevent the bending of the
blade.
It is preferred to make the pins with hollow inclines as such a construction in
my opinion gives the best results, but pins having feathered shanks and blades
formed by straight inclines are obviously included in the scope of the invention.
So far as I am aware it is new to use a wedge-shaped pin in combination with a
picker cylinder lag, and such an organization possesses material advantages.
In Figures 4. 5 and 6 I have shewn another form of the improved wedge-shaped
pin. In this instance the shank is square or angular, and the cutting blade instead
of being oval in cross section is diamond shaped. The cutting edge may if preferred
be rounded off slightly.
Having thus described my Invention, what I claim is:
First. A picker pin having a cutting or tearing blade, the faces of which are
formed by concave inclines substantially as set forth.
Second. The improved picker having a cutting or tearing blade, the broad faces
of which are formed longitudinally by concave inclines, but are convex on transverso
lines substantially as set forth.
Third. The herein described picker having a shank provided with feathers or
flanges and a cutting or tearing blade formed by inclined faces.
Fourth. The improved picker herein described having a shank provided with
feathers or ribs, and a diamond pointed cutting or tearing blade, the broad faces
of which are formed longitudinally by inclined faces, but are convex on transverse
lines.
Fifth. The combination, substantially as set forth of a picker cylinder lag, with
a series of picker pins having feathered or ribbed (or square) shanks, and cutting
or tearing blades, the faces of which are formed by inclined faces.
Sixth. The combination substantially as set forth of a picker cylinder lag and a
wedge shaped picker.

page_text: Seventh. A picker pin having a cutting blade which is diamond shaped in cross
section, substantially as set forth.
Eighth. The berein described picker having an angular shank and a cutting or
tearing blade, diamond shaped in cross section substantially as set forth.
In witness whereof I the said Sydney Pitt have hereunto set my hand and
seal this sixteenth day of October in the year of our Lord One thousand eight
hundred and eighty three.
(57)
INANIC תזוז

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