Improvements in Swinging Sewing-machine Treadles.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Swinging Sewing-machine Treadles.
I, CHARLES WILLARD SMART, of the City of Carbondale, County of Jackson,
State of Illinois, U.S.A., Gentleman, do hereby declare the nature of this invention,
nd in what manner the same is to be performed, to be particularly described and
scertained in and by the following statement :-
My invention relates to improvements in "Swinging sewing-machine treadles,"
nd consists in the novel arrangement and combination of parts, as will be inore fully
hereinafter described and designated in the claims.
In the drawings
T
:-
Application, outh mal 1000 word vary
COMPLETE SPECIFICATION.
Improvements in Swinging Sewing-machine Treadles.
I, CHARLES WILLARD SMART, of the City of Carbondale, County of Jackson,
State of Illinois, U.S.A., Gentleman, 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 :-
My invention relates to improvements in "Swinging sewing-machine treadles,"
nd consists in the novel arrangement and combination of parts, as will be more fully
hereinafter described and designated in the claims.
In the drawings
:―
TH
Fig. 1, front elevation of a machine stand having Invention applied
thereto.
Fig. 2 is a side elevation of my complete invention detached.
Fig. 3 is a longitudinal section of the upper end of my invention.
Fig. 4 is a detail view in side elevation of one of the bearings which I
employ.
Fig. 5, is a cross section taken on the line a, e, of Fig. 4, and
Fig. 6, is an enlarged cross-section taken on the line 2, z, of Fig. 3.
Referring to the drawings
1, represents a machine stand having the ordinary power-wheel 2 attached
thereto, in the usual manner, and to which my invention can be easily applied.
3 represents my complete oscillating-treadle, which is connected in any mechanical
manner to the under surface of the table 1, and in the rear thereof, and also to the
power wheel in a manner as hereinafter specifically described.
4, represents a bearing-plate which is attached to the under surface of the stand 1
by screws, or any other mechanical manner.
5 represents a casting so constructed as it will be easily attached to the bearing-
plate 4, in a manner as hereinafter described.
In order to produce as little friction as possible. I form in the casting 5 cone-
shaped bearings 6, which are adapted to receive the cone-shaped screws 7, passing
through the bearing-plate 4, the same being held when adjusted properly by means
of nuts 8 screwed on said screws, and bearing against the said casting, as best
illustrated in Fig. 3.
Cast with the bearing-plate 4 or suitably attached thereto is a depending portion 9,
within which is formed an opening 10 for receiving a short shaft 11, one end of
which shaft is secured within said opening by means of a
screw 12, and the
opposite end of said shaft projecting horizontally and free to receive a coil tortion-
spring 13.
The shaft 11 has formed with it a depending right angle extension 14, which
receives one end of the spring 13 and which is held securely thereby.
The opposite end of said spring bears against the solid portion of the casting 5,
thereby preventing the spring from turning, when the device is operated.
In order to hold the spring 13 in its proper position and location, the said
casting 5 is provided with a right angle extension 15, which receives the body of
the spring.
The said spring as will be seen, is interposed between the solid portions of the
casting 5, and the extension 14 of the shaft 11, making a strong and mechanical
connection.
The casting 5 is provided with a socket 16, within which the oscillating rod or
arm 17 is adapted to fit, and is held thereby by a set screw 18.
To the oscillating arm 17 is secured adjustably thereon, and to the lower end, a

page_text: foot plate 19 which is adapted to be adjusted on said rod by means of a set
screw 20.
The foot plate 19 is provided with a depression 21 which is adapted to fit
the heel of the shoe carried by the operator, which facilitates greatly in the
operation.
22 represents an adjustable clamp movable upon the oscillating rod 17, and is
provided with a set screw 23 whereby the said clamp is held in any desired position
upon the said rod.
The said clamp 22 is provided with a rearward extension 24, which extension
receives a short shaft or screw, answering the same function, whereby the pitman 25
is connected thereto.
25 represents the adjustable pitman for uniting and connecting the power wheel
of the machine to the oscillating rod 17.
The bearings on each end of the pitman are similarly constructed, and therefore
it is deemed only necessary to specifically describe one of them.
The pitman 25 consists principally of an angular arm, the ends of which are
received by the clamps 26, carried by said bearings.
27 represents an L-shaped arm, the inner surface of the parallel arms
thereof being V-shaped in cross section, as best illustrated in Fig. 5 of the
drawings.
To the clamp 26 is formed a depending portion 28, and at the end thereof is
formed a horizontal arm 29 at right angles to the said portion, also V-shaped in
cross section.
The clamps 26 are of such a size as to permit both the pitman 25 and one end of
the arm 27, to be clamped and adjusted within the said clamps by means of set
screws 30.
31 represents four blocks made preferably of hard wood, rubber or other suitable
material, which form the bearing proper for both the shaft 32 carried by the power
wheel, and the shaft 33 carried by the clamp 22.
Each block is provided with semicircular cutaway portions 34, which are adapted
to come in contact with the shafts as hereinbefore described.
The blocks 31 are provided on their opposite edges with V-shaped grooves 35,
which correspond to the V-shaped portions as previously described, whereby the
said blocks are held and adjusted in their proper positions.
The main object I have in view is to construct a cheap, substantial and adjustable
device in the way of an oscillating treadle, the utility of which can be readily
seen.
By the use of my invention, a continual bending of the ankle of the operator in
order to drive the machine, which frequently results in great fatigue and injury to
the person using the machine, is obviated.
By my improved form of treadle, it is only necessary in order to operate the
machine, to swing the foot back and forth from the knee without bending the
ankle.
By means of the adjustable pitman, as hereinbefore described, the movement of
the oscillating rod or treadle is regulated, which is very desirable.
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,
1. An oscillating treadle having an adjustable pitman, substantially as set
forth.
2. An oscillating treadle consisting of a rod, an adjustable clamp carried thereon,
and an adjustable pitman, substantially as set forth.
3. An oscillating treadle consisting of a casting or bearing-plate, an oscillating
rod movably secured to the same, and actuated in one direction by a spring,
a clamp adjustable on said rod, and a pitman carrying adjustable bearings for

page_text: uniting the said arm to the power or fly-wheel of the machine, substantially as
set forth.
4. In an oscillating treadle, the combination of the casting or bearing-plate 4,
the casing 5 movably connected to the same and free to oscillate therein, the coil
spring 13 for actuating said casting 5 in one direction, the rod 17 carried by said
casting 5, the adjustable clamp 22 and the adjustable pitman 25, substantially as set
forth.
5. In an oscillating treadle the combination of the bearing-plate 4, a shaft 11
carried by the same, the extension 14 formed with the said shaft, the casing 5
movably connected to the said bearing-plate, the coil spring interposed between
the said casting and extension 14, the adjustable clamp 22 carrying a shaft 33,
and an adjustable pitman 25 carrying the adjustable bearings, substantially as set
forth.
6. An oscillating treadle having an adjustable pitman 25, clamps 26 for receiving
the ends of the said pitman, arms 27 also adjustable within the said clamps,
extensions 28 formed with the clamps 26, and the blocks 31 for encircling both the
shaft 33 and the shaft 32 carried by the drive-wheel of the machine, substantially
as set forth.
Signed this 1st day of March 1892