Year: 1886

page_text: I, STILLMAN WILLIAMS ROBINSON professor of University, of Columbus, Franklin,
State of Ohio, United States 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:—
This invention has for its object to improve and simplify the mechanism for
actuating the grippers employed to grasp, feed and drive wire into the soles of.
boots and shoes in the operation of attaching the soles thereto.
This invention is an improvement upon the class of machine described in British
Patent N° 10,330 dated Sept. 1, 1885 and consists in the combination in a nailing
machine of the working head, having an attached tappet-ring, gripper carriers,
grippers provided with inclines, a threaded thimble and vertically movable threaded'
sleeve having inclined or beveled surfaces, whereby as the sleeve is moved vertically!
the said grippers acted upon by the sleeve are made to grasp the wire and hold it
to be driven.
This invention in nailing machine also consists in a spindle having a slotted
extension and containing grippers, combined with a vertically movable screw
threaded sleeve having inclines or projections to act upon the backs of and cause
the grippers to engage the wire or other fastening material during the vertical
movement of the said sleeve.
In the patent referred to, the grippers having straight backs and suspended from
gripper carriers supported by a tappet ring are forced inward, to grasp the wire
by means of a partially rotating cam ring but in the invention herein described
the backs of the grippers beveled or inclined as shown or in other equivalent
manner are acted upon by an incline or projection of a vertically movable threaded
sleeve, the rotation of a screw-threaded thimble cooperating therewith serving to
move the said sleeve vertically.
When the threaded sleeve is moved vertically its inclined interior acts upon the
inclined or beveled backs of the grippers, causing them to grasp the wire, but when
the sleeve is depressed the grippers release the wire.
3

page_text: Fig. 1 in vertical section represents a sufficient portion of the working head of a
nailing machine for uniting soles to uppers, which taken in connection with the
patent referred to will enable my invention to be understood.
Fig. 2 a side elevation and top view of the threaded thimble removed.
Fig. 3 an underside view and side elevation of the tappet-ring.
Fig. 4 a plan and a side elevation of the threaded sleeve.
Fig. 5 details in plan and section of the spindle extension showing the throat
pieces.
Fig. 6 a section of Fig. 1 in the dotted line < x, and
Figs. 7 and 8 modifications to be referred to Fig. 8 being a plan view of the
separable cam portions of the sleeve.
The frame work or bearing A the vertically reciprocating working head D the
presser plate carrying aleeve e within it the collar 6 attached to the said sleeve,
the attached bearing plate e presser-plate e, the partially rotating spindle B the
tappet-ring G provided with tappets 45, the screw 43 to connect the said ring with
the working head D, the washer 44 the throat pieces 78 and detaining jaws d' are
all substantially as in the said patent, and in practice the said parts will be operated
as in the machine described in the said patent.
Herein the spindle extension a has at its top a prolongation a¹ shown, see
Fig. 5 as of H shape to enter a correspondingly shaped recess in the lower end of
the spindle B the conical lower end a³ of the said extension taking a bearing in a
conical recess in the presser-plate e
The spindle extension is slotted through to receive the grippers 6 and gripper-
carriers c, and above the slots which receive the grippers the said spindle extension
is provided with a slot a to receive the detaining jaws d' common to the said
patent.
The gripper carriers c herein shown, have at their upper ends right angled
projections which extend outwardly over the top of the tappet-ring G as shown
in Fig. 1.
At their lower ends the gripper carriers have hooks or projections on which hang
the hooks of the grippers 6 and above the hooks or projections of the said carriers
which support the said grippers, the said carriers have lugs 2 that enter slots 3 in
the externally screw-threaded thimble f, placed in a recess in the tappet ring G and
between it and the spindle extension.
The grippers b, b, placed in the slots of the spindle extension a have their backs
or outer edges inclined or beveled, as best shown in Figa 1 and 7 to be acted upon
by the inclined or projecting surface 4 of the vertically movable sleeve g, provided
with a screw-threaded surface which is made to engage the screw-threaded surface
of the thimble f, the threads of the said sleeve and thimble being in this instance
left-handed.
The sleeve g at its outer side is provided with lugs g', gl, which as the spindle B and
its slotted extension are partially rotated as provided for in the machine described
in the said patent, strike again the stationary tappet 45 of the tappet-ring G thus
stopping the sleeve g and thereafter in the further rotation of the spindle and spindle
extension with the grippers and gripper-carriers, and the threaded thimble, the
latter, by its threads in engagement with threads of the sleeve arrested as described
by the tappet-ring is made to move the said sleeve vertically with relation to the
spindle and grippers, the inclined or projecting surface 4 of the said sleeve at such
time acting against the inclined backs of the grippers forcing them in against the
wire or fastening material, not shown, led through the center of the spindle and its
extension, and between the said grippers.
The inward movement of the grippers causes the latter to grasp the wire firmly,
and thereafter as the working head and tappet-ring descend with relation to the
spindle, the grippers are made to drive the wire into the stock, the descent of the
spindle being arrested sooner or later, as provided for in the said patent according
to the thickness of the stock on the horn or other support.

page_text: In the modification shown in Fig. 7 the sleeve is made in two parts connected
by screw-threads, as shown at h the said threads being shown as right-handed.
In the modification Figs. 7 and 8 the threaded shank of the lower portion of the
sleeve is slotted vertically at 8, the said slots being cut through the said threaded
shank the said slots being extended downward within the thicker portion of the
sleeve and having inclined bottoms, as shown at the right of Fig. 7 the said slots,
just wide enough to receive the grippers, acting against the inclined backs of the
grippers and pushing the latter inward as described to grasp the wire.
By dividing the sleeve in two parts, as described, it is possible to accelerate the
vertical movement of the inclined part of the said sleeve and in the said modifica-
tion it will be noticed that the inclined part of the sleeve g rotates in unison with
the spindle rather than being entirely stopped or arrested, as in Fig. 1.
Reverse rotations of the spindle and thimble causes the sleeve g to descend,
permitting the grippers to release their hold upon the wire.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
"
First. The combination in a nailing machine of the working head having an
attached tappet-ring, gripper carriers, grippers provided with inclines a threaded
thimble and vertically movable threaded sleeve having inclined or beveled surfaces,
whereby as the sleeve is moved vertically the said grippers acted upon by the
sleeve are made to grasp the wire and hold it to be driven, substantially as
described.
Second. In a nailing machine, a spindle having a slotted extension and containing
grippers, combined with a vertically movable screw-threaded sleeve having inclines
or projections to act upon the backs of and cause the grippers to engage the wire or
other fastening material during the vertical movement of the said sleeve, substan.
tially as described.
D
"
T1
3000