Year: 1888

page_text: 1, GEORGE WALTON BAKER, residing at 214 French Street Wilmington, in the
County of New-Castle and State of Delaware, one of the United States of
America, 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 :-
Figure 1, of the drawings is a side elevation of my improved staking-machine.
Figure 2, is a side elevation of my improved staking-machine. Figuro 3, is a plan
view. Figure 4, is a detail side view of belt, F. Figure 5, is a top view of the same.
Figure 6, is a transverse section of the slide, G, line xx, Figure 3. Figuro 7, is a
section of knife and jaws, line y y, figure 8. Figure 8, is a detail front view of jaws
and knife. Figure 9, is a detail view of the friction blado.
This invention bas relation to machines for staking and perching leather; and it
consists in the novel construction and combination of parts, all as hereinafter set
forth.
In the accompanying drawings, the letter, A, designates the frame of the machine,
which is preferably made of iron, and is formed with uprights or bearing portions to
support the mechanism.
B, B, are upright guides in front and rear of the frame, and C, C, are movable
supports or pedestals of the table, D, said supports or pedestals having a vertical
reciprocating motion between the guides when operated, as hereinafter set forth.
E, is a shaft extending along the bed plate or sill of the frame in suitable bearings,
and having upon it the cams, a a, which engage the lower ends of the supports, U.
A pedal, b, connected to the end of the shaft, enables the operator to turn the shaft
and raise the entire table, according to requirement.
The table, D, is preferably inclined downward from front to rear, and is provided
with the lateral wings or supports, CC, which are arranged at the sides of the central
way, d, which extends longitudinally, and is provided at its ends with the rollers, e e,
over which passos the belt or apron, F, which carries the slide, G, which moves on
bearings, f, in the sides of the central way. The slide is provided at its front end
with a slot, g, or bearing, in which is seated the piece, h, which has a transverse
slot, k. This piece or block, h, is removable, and several such blocks having slots of
different width are provided in connection with the machine to be used with staking-
tools of different thickness. The rear end of the slide has a lug, l, to which is con-
nected the rear end of the adjustable pitman, H, the front end of which is connected
to the staking-tool carrier, K. In order that the pitman may be readily and oxactly

page_text: adjusted to the stroke, it is made in two sections having right and left threaded ends.
which are connected by a union-nut, m. by turning which the pitman may be lengthened
or shortened, according to requirement. The belt or apron, F, fills the interval
between the edges of the central way and supports the skin when the slide has moved
back. Pivoted to the front portion of the table is the clamp I, the upper end or
jaw, J, of which closes toward the edge, I, of the table to hold the skin of leather at
the point desired. A spring, n, serves to automatically open the clamp when the
hook or catch is disengaged. This hook or catch consists, preferably, of a long
arm, N, which is pivoted to a crank arm, p, on a transverse shaft, 7, which is seated
in bearings of the rear portion of the main frame. To the shaft, is connected a
crank arm, which is operated by a cam on the main driving shaft, S, which engages
the head of the pitman, t, which is connected to said crank-arm, r. At a certain time
in each revolution of the main shaft the clamp is opened and closed, sufficient time
being given between the opening and closing of the clamp to allow the operator to
shift the skin, so that it will be held at a fresh portion.
The catch rod or arm, N, is usually made adjustable, and preferably consists of two
sections having right and left threaded ends, which are connected by a union nut or
coupling, T, by turning which the rod can be lengthened or shortened to regulate the
pressure of the clamping-jaw. The catch-rod is provided with a second, catch, vl, in
front of the first catch, v, so that the clamp can be quickly and readily opened widely,
to enable the operator to insert the skin of leather between the jaws when commencing
work thereon.
Extending forward above the table is an overhanging portion, V, of the main
frame, which is provided with guides, a' a', which are in direction normal to the
plane of the table below. Between these guides is the reciprocating frame, Z, which
carries the front and rear cams, B' B', which are engaged by pins of the crank-
arms, D', of the shafts, C, which are operated from a crank-arin, E', on the main
driving-shaft, by means of pitmen, F¹ and G. The cams, B₁, are preferably slots
circularly curved at their rear ends to correspond with the radial sweep of the crank-
arms, D, so that when the pins of said crank-arms are moving in the curved portion
of the cam slots the reciprocating frame, Z, will be stationary, and during this time
the stroke of the staking-tool is made.
In the frame, Z, is provided the longitudinal guide-way, G2, in which travels the
staking-tool carrier, K, to which is secured the staking-tool, W, suitable jaws, w,
being provided to hold the staking-tool firmly. Several staking-tools of different
thickness are provided with each machine, thin leather requiring a staking-tool with
a sharper edge than is required in operating upon thick leather. K', is a friction
blade secured between suitable jaws in one side of and parallel to the staking-tool.
An arm, L, extends upwardly from one of the jaws and is secured to the face of the
carrier, K, by the headed bolts, K', which pass through slots, l, in said arm, the
upper end of the arm, L', is turned at right angles and provided with an opening
adapted to fit loosely on the vertical pin, M', having its outer end threaded and
provided with the adjusting nut, N¹, and a coiled tension spring, O', surrounding the
pin, M', between the nut and the inwardly turned end of the arm, L', serves to hold
the friction blade in contact with the leather.
The staking-tool carrier is reciprocated by means of the main crank, V', on
the driving shaft, motion being communicated to the staking-tool carrier by the
pitman, P
J', is a stay or brace rod pivotally connected at the forward end to the reciprocating
frame, Z, and having its rear end pivotally connected to the upper outer end of the
guide, a. The stay-rod, J¹, being so connected, acts as a brace to the frame, Z, in its
upward and downward movement.
The operation is as follows: The skin of leather being laid upon the table is held
at one point by the clamp, which closes automatically thereon. At the same time the
slotted slide, the friction blade and the staking-tool are moved forward, the former
under the skin and the latter above it. At the close of the forward movement the
reciprocating frame, Z, descends, bringing down the staking-tool, which engages the

page_text: leather and presses it into the transverse slot at the same time that both staking-tool
and slotted slide move to the rear, so that the leather is staked and perched throughout
the extent of the stroke of the staking-tool. The pressure of the staking-tool upon
the leather as it presses it into the transverse staking-slot is regulated by the operator
by means of the pedal, which enables him to lift the table to obtain the exact pressure
required, and the friction_blade presses the skin upon the plate and prevents the
leather from wrinkling. Upon the return of the staking-tool and slotted slide the
clamp opens automatically and remains open long enough to enable the operator to
shift the skin of leather to obtain a fresh purchase for the next stroke.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In a machine for staking leather, the combination, with the reciprocating slotted
slide having the apron connected thereto, of a reciprocating staking-tool adapted to
press the leather into the slot of the slide during the reciprocation of the slotted slide
and the staking-tool, substantially as specified.
2. The combination, with the reciprocating staking-tool and the reciprocating
slotted slide, of the adjustable table provided at its ends with the apron and the
rollers, e e, substantially as specified.
3. The combination, with the reciprocating staking-tool and the reciprocating
slotted slide, of the automatically opening and closing clamp pivoted to the front
portion of the table, substantially as specified.
4. The combination, with the reciprocating staking-tool and the reciprocating
slotted slide and the movable table carrying said slide, of the cam-shaft and its pedal,
substantially as specified.
5. The combination, with the reciprocating staking-tool, of the adjustable table
having a central way, the bearing rollers thereof, the slotted slide, and the belt or
apron connected to said slotted slide, substantially as specified.
6. In a leather staking machine, the combination, with the table and the clamp
pivoted thereto, of the catch rod connected to a crank-shaft and operated by a cam
on the main driving shaft, substantially as specified.
7. In a leather staking machine, the combination, with the reciprocating slide and
its belt, the reciprocating staking-tool carrier, and mechanism to operate the latter, of
the adjustable pitman connecting the slide to the staking-tool carrier, substantially as
specified.
8. A leather staking and perching machine having an inclined table and a recipro
cating slide connected thereto, a reciprocating staking-tool carrying frame moving in
slides normal to the plane of the table, a reciprocating staking-tool-carrier moving in
a way of said frame, a pitman connecting the staking-tool carrier and slide, and cam
mechanism to regulate the rise, fall, and pause of the reciprocating frame, substantially
as specified.
9. A machine for staking leather, having a reciprocating slide and a flexible
supporting apron connected thereto, in combination with a staking-tool, substantially
as specified.
10. The combination with the reciprocating staking-tool and the reciprocating
slotted slide of the friction blade secured to the staking-tool carrier, substantially as
specified.