Improvements in and relating to Jiggers for the Manufacture of Pottery.
Year: 1895

page_text: Date claimed for Patent under Sect. 103 of Act,
being date of first Foreign Application (in 11th Aug., 1894
United States of America),
Date of Application (in United Kingdom), 14th Feb., 1895
Complete Specification Left, 14th Feb., 1895-Accepted, 29th June, 1895
United States of America),
Date of Application (in United Kingdom), 14th Feb., 1895
Complete Specification Left, 14th Feb., 1895-Accepted, 29th June, 1895
Improvements in and relating to Jiggers for the Manufacture of
Pottery.
.:
I, JOSEPH CROSSLEY of corner of Monmouth and State. Streets, Trentou,
County of Mercer and State of New Jersey, one of the United States of America,
Manufacturer, 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 :-
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i
This invention relates to machinery for making pottery ware and has especial
reference to that class of machinery used, for making plates, cups, saucers and
other circular ware and has for its object certain improvements in the construction
of a combined jigger and pull-down which will be fully disclosed in the following
Specification and claims.
In the accompanying drawings which form part of this Specification
Figure 1 represents a side elevation of my improved machine with the pull-down
raised and the parts of the machine in their normal position or at rest; Figure 2
a like view, with the pull-down lowered and all the parts in position when at work,
and the casing and the operating shait of the jigger in vertical longitudinal
section;:
Figure 3 a top plan view with the jigger-head removed;
Figure 4, an enlarged section of the worm gear-wheel, showing its..cam surface
in one of its sides and the cam which operates the pull-down automatically;
Figure 5, a view taken on the line . . Figure 1 looking in the direction of the
arrow;
Figure 6, a vertical transverse section on the line y. Figure 1 and
Eigure 7 a detail perspective of the pull-down.
Reference being had to the drawings and the letters thereon,, A indicates a
rectangular metallic case or box in which the operating mechanism of the jigger
is inclosed and designed to be immersed in oil and is provided with a two part
removable cover a separated at b, so that ready access may be had to the inclosed
machinery for repairs or renewal of any of the parts.
B-is the jigger, the spindle c of which is provided with a conical journal d which
rests in a Tearing or step e which is vertically adjustable in the pocket or
extension f of the casing A by means of a set screw g and is held against rotation
by a screw which extends through the wall of the casing and engages the
bearing. e.
Cis the head of the jigger on which a plate or other article, or a. hat for the
plate is formed and on the upper end of the spindle is a conical enlargementz

page_text: supported ɖð a removable copical bearing in the extension i of the front section-
of the cover a and is held in position by a set screw k, and above the enlargement z
is a conical extension which engages a like: conical recess m in the underside of
the jigger-head, as shown in Figure 2. On the spindle c and near the lower end
is a miter gear wheel n which meshes with a large gear wheel o secured to the main
shaft p of the jigger, and on the shaft-pis a, worm g which is engaged by a worm
wheel r on the supplemental shaft 8. The shaft is supported at each end in
brackets tu attached directly to the bottom of the casing A, as shown in Figures 1
and 2, and on the bracket t is a friction disk to which is engaged by a corresponding
disk a¹ which is connected to the collar of the gear wheel o and the two disks form
a supplemental brake to arrest the momentum of the jigger after the molding of
the bat or an article of pottery ware. The shaft p has a. slight longitudinal
motion and carries the disk a' with it, and said motion of the shaft is limited by a
collar bon the shaft. The shaft p is also provided with a miter gear-wheel d¹ on
the rear side of which is a friction disk e¹ and the two are secured to the shaft p by
a pin or by any suitable means.
On the shafts is a cam g' which operates the pull-down or arm D which supports
the bar to which the sweep or profile is adjustably secured by holts k² k*
which work in 'a slot in the bar, and the bar is adjustable in the head m! by
means of set screws n¹. The arm D is on one side of a circular disk o', and on
the opposite side of the disk is an arm pon which is an adjustable counter-
weight,g to raise the arm D and the strike or. profile i¹ out of engagement with
the piece being formed on the jigger-head C, and on one side of the disk o' is a
stud which engages one arm of a bifurcated lever whose other arins t' u',
respectively engage the cam gland the friction disk'e'. The stud is provided
with a friction roller and the disk o' is supported on a bracket wol and secured
to oscillate on the disk a' thereof by a bolt, as shown in Figures 5 and 6 and
the bifurcated lever is supported on a shaft a" on the bracket w and the arm t¹ is
provided with a friction wheel 6 to engage the cam g':
E is the main power shaft provided with a pulley and on the hub of the
pulley is one half d" of a clutch F, the other half e" being movably supported, on
said shaft, and on. the inner end of the shaft E is a miter gear wheel f" which
engages the gear wheel d' and imparts motion to the shafts pands through the
medium of their respective gear wheels. The clutch F is thrown into engagement
by an arm g" attached to a longitudinally movable rod 4" supported in a bracket i
secured to the cover a of the casing A as shown in Figures 3 and 5 and is
automatically thrown out of engagement by the cam in one face of the worm
gear wheel with which the inner end-of the rud h¹ engages and is moved outward
as soon as the bat or article on the jigger block C is completed.
As a means for operating the rod for throwing the clutch F into engagement
a lever G is shown pivoted to a fulcrum m in the cover a in Figure 3 and
connected to the rod " at n" and is designed to be operated by being pushed by
the body of the operator.
In the operation of the machine- as soon as the clutch F is thrown into
engagement and the cam g' revolves on its axis sufficiently to move the cam t
out of engagement with the recess of the bifurcated lever by its arm at pushes
the stud back and the pull-down or arm D with its arm and strike & down
upon the clay on the jigger-block C where the strike is held until the circular
portion of the cam has passed the arm and its end again enters the recess o",
when the counter-weight g¹ raises the arm D, applies the brake shoe " to the
disk e¹ and draws the disk a' against the disk w and stops the jigger, when the bat
or the article of pottery ware is removed from the jigger-head C and a new supply
of clay placed thereon. At the instant the arm t enters the recess o" in the
cam g' the cam in the gear wheel has shifted the rod " and the arm 9" and
thrown the clutch F out of engagement when the brakes almost instantly stop the
momentum of the jigger..
i
"

page_text: It is obvious: that the pull-down arm D may be drawn down by hand, and, for
this purpose a hole is provided for a handle and good results obtained, but
the automatic and mechanically operated pull-down is preferred as it to a great
degree increases the efficiency of the machine and practically dispenses with the
necessity of employing skilled labor for operating the machine. When operated
by hand the down stroke of the arm.D is limited by a set screw q¹¹ engaging a
lug on the rim. o!...
In practice two machines are placed side by side and a boy standing between
the two forms the bats on one machine and removes the bal and places it on the
mold of the jigger of the other machine where the article is struck up or molded,
when the mold with the article on it is removed by another boy to the drying
rack. The boy who stands between the two machines has control of the starting
of both and pushes the shifting lever G of each machine alternately.
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 :-
First. A jigger having a vertical spindle, a support for said spindle and a
horizontal operating shaft inclosed in a casing, in combination with a pull-down
supported on the cover of the casing.
Second. A jigger having a vertical spindle, a vertically adjustable bearing for
said spindle, a horizontal operating shaft inclosed in a casing and a removable.
cover for the casing, in combination with a pull-down supported by said cover.
Third. The combination of a jigger, a pull-down and a brake operated by the
pull-down.
Fourth. A jigger and a longitudinally movable operating shaft provided with
separable friction disks, in combination with suitable operating mechanism, and a
pull-down.
Fifth. A rectangular casing, in combination with a vertical spindle supported in
a movable bearing and a horizontal shaft connected to the spindle and supported
on brackets within the casing, and a pull-down supported on the cover of the
casing.
Sixth. A casing, a vertical jigger spindle supported in extensions of the casing
on its bottom and top, in combination with an operating shaft within the casing
and a pull-down supported on the cover.
Seventh. A rectangular casing, provided with a removable cover, a jigger
supported by the casing at one end and a pull-down supported on the cover, in
combination with suitable operating mechanism.
Eighth. The combination of a jigger, a horizontal operating shaft provided
with a friction disk, an automatic pull-down and a brake operated by the
pull-down.
Ninth. A jigger and a pull-down in combination with a shaft supporting a worm
gear, a shaft supporting a worm gear wheel and a cam and an arm engaging the
cam to operate the pull-down and a brake operated by the pull-down.
Tenth. A jigger in combination with a pull-down comprising a circular rim
having a head to support an arm and a strike on one side and a counter-weight
on the opposite side and a projecting stud, a vibrating lever and a cam for operating
the lever and a brake operated by the pull-down.
Eleventh. A jigger, in combination with a pull-down, clutch mechanism and a
device for automatically disengaging the clutch and a brake operated by the
pull-down.
Twelfth. A jigger and an operating shaft provided with a worm gear, a worm
gear wheel engaging said worm gear and provided with a cam on one side,
and a rod engaging the cam, in combination with a pull-down, and a clutch
mechanism.
Thirteenth. A jigger, an operating shaft provided with a friction disk, and

page_text: a pull-down, in combination with a cam; a vibrating lover having an arm operated
by the pull-down, an arm engaging the friction disk and an arm engaging
the car.
1
chi
JENSEN & SON,
77, Chancery Lane, London, W.C, Patent Agente.