Improved Leather Dressing Machine.
Year: 1890

page_text: Date of Application, 22nd Nov., 1890
Complete Specification Left, 24th Aug., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
Improved Leather Dressing Machine.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a communi-
cation to me from abroad by Thomas Coombs, of Woburn, Massachusetts, U.S.A
Engineer,) to be as follows:-
This invention relates to an improved machine for dressing leather more expedi-
tiously than by those machines of this class at present in use.
The mechanism comprises an ordinary framework, in the upper part of which is
pivoted a swing-lever, to the free end of which is pivoted one end of another lever
whose centre rocks upon links arranged upon a shaft in the framework, and whose
other end is attached to a holder carrying the dressing tool. The holder carrying
the tool is connected by a pitman to a crank pin upon the side of the rim of the
drive-wheel mounted on a shaft in the frame.
These levers are arranged in such manner that a peculiar rocking movement is
given to them, and a reciprocating movement is given to the dressing-tool. A. table
to support the leather is arranged beneath the tool in such manner that it can be
adjusted to any height or angle, and by reason of its spring supports, will give to
the slight are described by the tool when passing over it.
Dated this 22nd day of November 1890.
J. T. BAIL,
Applicant.
.COMPLETE SPECIFICATION.
Improved Leather Dressing Machine.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by Thomas Coombs, of Woburn, Massachusetts,
U.S.A. Engineer,) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
Fig. 1 is an elevation of my improved machine,
Fig. 2 a sectional elevation showing a modification in. the arrangement of the
jack-head,
Fig. 3 a front elevation of the head, and
Figs. 4, 5, 6, and 7 views illustrating details of construction.
Like letters and figures of reference indicate corresponding parts in the different
figures of the drawings.
My invention relates especially to machines for glassing, pebbling, or rolling
leather, and it consists in certain novel features hereinafter fully set forth and
claimed, the object being to produce a simpler, cheaper, and more effective device
of this character than is now in ordinary use.
The nature and operation of the improvement will be readily understood by all
conversant with such matters from the following explanation.
In the drawings A represents the body or frame of the machine, which consists
of two parallel vertically-inclined standards bb. From the top of the standards two
vertical arms d d project. A lever f is pivoted at one end in the upper ends of said
arms, and a pendulum B is pivoted to the outer end of said lever. A vertically-
arranged rod g is pivoted centrally to the lever f, its lower end being fitted to slide

page_text: in a cross-bar / connecting the arms d. A portion of the rod is screw-threaded and
a nut turned thereon. A coiled spring; is disposed around the rod, one end
thereof resting on the cross-bar and its upper end secured to a washer & adapted to
engage the nut, whereby the tension of said spring may be regulated. Connecting-
rods m m are pivoted centrally to the pendulum B and the tops of the standards b.
A driving-wheel C is journalfed in the rear of the standard 1. A crank-rod D is
pivoted at one end to said wheel and the head or tool-holder H is mounted on the
outer end of said rod, the upper end of said head being journalled at p to the lower
end of the pendulum B. A printing-roll 7 is mounted on bearings on the bottom
of the head. Arms & project longitudinally from the foot of the standards. The
bed or table K of the machine is mounted in said arms. Said bed comprises a table
proper to the inner end of which a vertical rod 10 is secured. The lower end of the
rod is pivoted to an arm of a bell-crank lever 15 journalled in the standards b.
Two rods are secured to the outer end of the table and have their lower ends
pivoted to an arm of a bell-crank lever 16 journalled in the frame-arms t. The
levers 15 and 16 are journalled in different horizontal planes so that the table v
icclines inward longitudinally. The rods are threaded at 17 and provided with
hand-wheels 18 whereby the incline of said table may be regulated.
บ
A rod 19 parallel with the table is fitted to slide in cross-bars or braces 20 on
the arms t.
This rod is screw-threaded at 21 and nuts 22 are mounted on said
threaded portions. The bodies of said nuts are grooved vertically and the lower
arms of the bell-crank levers respectively astride them. The outer end of the rod
is provided with a hand-wheel 23 and a nut provided with a hand-wheel 24 works
on said rod. A coiled spring 25 is disposed between the brace 20 and said hand-
wheel 24, and acts expansively to force said rod outward. A check-nut engages
the inner face of the brace 20 and determines the outward movement of the rod.
By rotating said rod the nuts 22 are caused to travel thercon and move the bell-.
crank levers 15 and 16 and adjust the table v vertically, as desired.
The form of head H shown in Fig. 2 comprises a bell-crank lever 30 pivoted
to the crank-rod D, said rod being pivoted to the lower end of the pendulum
at 31. In one
arm of the lever 30 a rubbing-glass 32 is secured in
place of the roll g. The opposite arm of the lever is connected with the
pendulum B above the pivot 31 by means of a pivoted rod 35.
In the use of
my improvement power being applied to the wheel C by means of the pendulum B
connecting-rods in and pitman D, and pivoting the head H to said pitman and
pendulum, as described, an oscillating movement is imparted to said head. The
lever being adjusted on the table in the ordinary manner, the head is constantly
in engagement therewith during its movement, as best shown in Fig. 2. When the
pitman passes the centre and its pivot on the wheel C is above the axle thereof, on
its return the compound levers 30 and 35 and pivot between the pitman and pendulum
cause the head to be elevated out of contact with the lever during the forward
movement. By this arrangement of levers a new portion of the glass surface is
constantly presented to the leather, said glass being mounted in a bell-crank lever,
and constantly assuming a different vertical plane as the pendulum swings forward,
and said bell-crank is thereby connected. This imparts. a much finer and more
permanent polish to the leather than when the same portion of the glass is constantly
in contact therewith. Said table being adjustable by means of the rod 19 the force
of the contact of the glass on the leather is readily fixed. Said table being mounted
on the levers 15 and 16 connected with the slide rod 19, the spring. 25 interposed
between the brace 20 and a nut on said rod serves to cushion the table against
pressure of the head. By imparting an oscillating pendulum movement to the head,
as described, the lever may be much more quickly and thoroughly threaded than in
machines of this class wherein the head has a movement parallel with the bed. By
means of the screw-rods a the incline of the table may...he more accurately
adjusted so that the head will engage the leather with equal force during its entire
stroke.

page_text: Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I.
claim is:
1. In a leather-dressing machine, the combination, with the levers 15 and 16, of
the table, mounted on rods wx, pivoted to corresponding arms of said levers, the
sliding rod 19, bearing the nuts 22 connected with the opposite arms of said levers,
the nut 24 and spring 25 arranged to operate, substantially as described.
2. In a leather-dressing machine, a frame and a driving-wheel and crank-rod
bearing the head, in combination with a lever pivoted on said frame, a spring-
cushioned rod pivoted centrally to said lever, a pendulum pivoted to the outer end
of said lever and to said head, and a connecting-rod pivoted to said frame and
centrally to said pendulum, substantially as described.
3. In a leather-dressing machine, the combination of a frame, a driving-wheel
and crank-rod, a head comprising a bell-crank lever pivoted to said rod, a lever
pivoted to said frame, a spring-cushioned slide rod pivoted to said lever and crank-
rod, a connecting-rod pivoted centrally to the pendulum and to said frame, and a
pivoted lever connecting said pendulum and bell-crank lever, substantially as
described.
4. In a leather-dressing machine, the combination, of a frame, a bell-crank lever
thereon, an inclined table mounted on rods respectively pivoted to an arm of said
lever, the rods connecting with one lever being a spring-cushioned sliding-rod
connecting with the opposite arms of said levers for adjusting said table vertically,
and a stop adjustable on said rod for limiting the movement thereof in one direction,
substantially as described.
Dated this 22nd day of August 1891.
J. P. BAYLY,
Applicant.