Improvements in Driving Chains.
Year: 1898

page_text: Improvements in Driving Chains.
I, EVERETT FLEET MORSE, of Trumansburg, Tomkins County, in the State of
New York, United States of America, Mechanical Engineer, do hereby declare
the nature of this invention to be as follows:-
:-
This invention has reference to improvements in driving chains of the kind
known as roller chains, the object being to reduce friction and the consequent
wear of the bearing surfaces of these chains. For this purpose I connect the
links of such chains by means of seat and rolling pins such as those described in
the Specifications of former Letters Patent No. 20052 of 1893 and No. 11923 of
1896 and surround the middle portion of each pair of such pins with a hollow
roller which bears against the teeth of the sprocket wheels when the chain is
in use.
Chains according to this invention are illustrated by way of example in the
accompanying drawings. Fig. 1 is a section and Fig. 2a plan partly in section
of a short length of roller chain comprising a series of long outer side links 1,
a series of shorter inner side links 1", seat pins 2, rolling pins 3 and hollow rollers 4.
Each side link 1" is formed with a cylindrical aperture near each end, whilst
each side link 1 (see Fig. 1") is formed near each end with an aperture adapted
to fit the ends of the seat pins 2 each of which pins is sufficiently long to extend
through the apertures in a pair of parallel side links 1, in a pair of parallel side
links 1 and in a roller 4. The rolling pins 3 are somewhat shorter than the
seat pins 2 and each one is arranged beside a seat pin 2 so as to extend through
the aperture in a roller 4 and into the apertures in the corresponding ends of a
pair of side links 1° as shown. The outer side links 1 are held firmly in position
by the metal of the side links being forced into nicks formed across the ends of
the seat pins as described in the Specification of Letters Patent No. 11923 of
1896; the outer side links 1 then retain the inner side links 1" in position and
prevent the rolling pins moving in the direction of their length. In this
example, the teeth of the sprocket wheels pass through the apertures in the chain
between each pair of long outer side links 1 and in order to form bearings for
the sides of the teeth of the sprocket wheel, it may be desirable to extend the
end portions of the inner side links 1" somewhat beyond the rollers 4.
It will be understood that, in working, the rolling pins will oscillate with the
side links 1" and will not move together with the rollers 4 since the pressure of
the said links against the said pins is greater than that of the rollers.
Fig. is a corresponding view to Fig. 2 of a modified construction of chain
in which the outer side links 1 are shorter than the inner side links 1, the ends
of which extend but slightly beyond the rollers 4. Although the seat pins and
rolling pins may be arranged as described with reference to Figs. 1 and 2, I
sometimes connect the rolling pins 3 instead of the seat pins to the outer side
links 1, the seat pins 2 being contained wholly within the cylindrical apertures
of the rollers 4 and the inner side links 1*. As will be seen from Fig. 4 the

page_text: cross sectional forms of the seat pins and rolling pins are slightly modified, the
swelled side portions or shoulders of the seat pins being dispensed with and the
rolling pins 3 provided with similar swelled side-portions or shoulders in order
to increase their transverse strength. In order to maintain the seat pins 2 in
the required positions, the side links 1° are provided with ribs or projections 1*
(see Fig. 4) that extend into the apertures formed in their ends and take into
grooves or recesses 2* formed in the backs of the seat pins 2. By this means the
plane bearing surface which bears against the rolling pin is maintained per-
pendicular to the forces of the joint and any tendency of the bearing surfaces of
the pins to slide or glide one upon the other is overcome.
Between each roller
and the pins within it there may be interposed a sleeve or bush, the ends of which
fit into suitably formed recesses in the inner side links. Sleeves or bushes thus
arranged prevent the rolling movement of the rollers acting on the pins and also
prevent dust and dirt reaching the bearing surfaces.
I, EVERETT FLEET MORSE, of Trumansburg, Tomkins County, in the State of
New York, United States of America, Mechanical Engineer, 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 reference to improvements in driving chains of the kind
known as roller joint chains, the object being to reduce friction and the consequent
wear of the bearing surfaces of these chains and to minimize the friction between
the chain and the teeth of the sprocket wheel. For this purpose I connect the
links of such chains by means of seat and rolling pins such as those described in
the Specifications of former Letters Patent No. 20052 of 1893, and No. 11923 of
1896, and surround the middle portion of each pair of such pins with a hollow
roller which bears against the teeth of the sprocket wheels when the chain is in
use.
Chains according to this invention are illustrated by way of example in the
accompanying drawings. Fig. 1, is a section and Fig. 2, a plan partly in section
of a short length of roller chain comprising a series of long outer side links 1,
a series of shorter inner side links 1ª, seat pins 2, rolling pins 3, and hollow rollers
or sleeves 4.
Figs. 3 and 4, correspond in mode of illustration to Fig's 2 and 1, respectively,
and show a modified construction and arrangement of parts. Fig's 1 and 4, are
details of parts in Fig's 1 and 4. Fig 1 shows a modification in the inside
link 1".
Each side link 1, is formed with a cylindrical aperture near each end, whilst
each side link 1 (see Fig. 1), is formed near each end with an aperture adapted
to fit the ends of the seat pins 2, each of which pins is sufficiently long to extend
through the apertures in a pair of parallel side links 1, in a pair of parallel side
links 1, and in a roller 4. The rolling pins 3, are somewhat shorter than the
seat pins 2, and each one is arranged beside a seat pin 2, so as to extend through

page_text: the aperture in a roller 4, and into the apertures in the corresponding ends of a
pair of side links 1º, as shown. The outer side links 1, are held firmly in position
by the metal thereof being forced into nicks formed across the ends of the seat
pins as described in the Specification of Letters Patent No. 11923 of 1896, and as
indicated at 5; the outer side links 1, then retain the inner side links 1º, in
position and prevent the rolling pins moving in the direction of their length. In
this example, the teeth of the sprocket wheels pass through the apertures in the
chain between each pair of long outer side links 1, and in order to form bearings
for the sides of the teeth of the sprocket wheel, it may be desirable to extend the
end portions of the inner side links 1ª, somewhat beyond the rollers 4. The
form preferred for this extension is seen in Fig. 1, where the ends of said links
terminate in triangular points 6.
It will be understood that, in working, the rolling pins will oscillate with the
side links 1, and will not move together with the rollers 4, since the pressure of
the said links against the said pins is greater than that of the rollers.
Fig. 3, is a corresponding view to Fig. 2, of a modified construction of chain
in which the outer side links 1, are shorter than the inner side links 1, the ends
of which extend but slightly beyond the rollers 4. Although the seat pins and
rolling pins may be arranged as described with reference to Figs. 1 and 2, I
sometimes connect the rolling pins 3, instead of the seat pins to the outer side
links 1, the seat pins 2, being contained wholly within the cylindrical apertures
of the rollers 4, and the inner side links 1*. As will be seen from Fig. 4, the
forms in cross section of the seat pins and rolling pins are slightly modified, the
swelled side portions or shoulders of the scat pins being dispensed with and the
rolling pins 3, provided with similar swelled side-portions or shoulders in order
to increase their transverse strength. In order to maintain the seat pins 2, in
the required positions, the side links 1ª, are provided with ribs or projections 1*
(see Fig. 4) that extend into the apertures formed in their ends and take into
grooves or recesses 2*, formed in the backs of the seat pins 2. By this means the
plane bearing surface which bears against the rolling pin is maintained per-
pendicular to the forces of the joint and any tendency of the bearing surfaces of
the pins to slide or glide one upon the other is overcome.
Between each roller
and the pins within it there may be interposed a sleeve or bush, the ends of which
fit into suitably formed recesses in the inner side links. Sleeves or bushes thus
arranged prevent the rolling movement of the rollers acting on the pins and also
prevent dust and dirt reaching the bearing surfaces.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
:-
1. A chain in which the links are connected by means of seat and rolling pins,
the middle portion of each pair of said pins being surrounded by a hollow roller.
substantially as described.
2. The combination with the outside links and the seat pins securing the links
together at their ends, the inside links through which the seat pins pass, the rolling
pins bearing against the seat pins and confined at their ends in the inside links,
and sleeves or rollers surrounding the seat and rolling pins.
3. The combination with the outside links and the seat pins securing the links
together at their ends, the inside links having extended ends for the purpose set
forth and having apertures near the ends through which the seat pins pass, the
rolling pins bearing against the seat pins and confined at their ends in the
apertures in inside links, and sleeves or rollers surrounding the seat and rolling
pins.
4. The combination with the outside links and the rolling pins securing the
said links together at their ends, the inside links through which the rolling pins
pass, the seat pins bearing against the rolling pins and confined at their ends in
the inside links, and sleeves or rollers surrounding the seat and rolling pins.

page_text: 5. The combination with that portion of the chain which rests between adjacent
sprocket teeth and consists of the outside links held together by the seat pins and
the sleeves surrounding said pins, of the inside links through the ends of which
the seat pins pass, and the rolling pins passing through the sleeves and confined
in a medial position in the end of the inside links.
6. The improvements in driving chains having two-part pintles, substantially
as described respectively with reference to and shown in Figs. 1 and 2 and Figs. 3
and 4 of the drawings.
Dated this 28th day of July 1898.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.