Improvements in Chains for Gearing.
Year: 1895

page_text: Date of Application, 1st.Jan.. 1895
Complete Specification Left, 1st Nov., 1895-Accepted, 7th Dec., 1895
4
PROVISIONAL SPECIFICATION.
Improvements in Chains for Gearing.
I CHARLES JOHN CHUBB 212 Cornwall Road Notting Hill London Engineer
do hereby declare the nature of this invention to be as follows:-
My invention has for its object the construction of pitch-chains without any
screws or rivets in such a way that they can be taken apart and put together
without any injury to the chain and yet cannot fall apart or become disconnected
accidentally without force.
The invention applies to almost every kind of pitch-chain which is constructed of
links and pins or bolts.
The invention consists in the peculiar construction of the end or ends of the pin
or bolt and in the provision of a locking plate.
The bolts or pins (hereinafter referred to as pins) have at one or both ends an
annular chase or groove cut at right angles to the pin just outside the part occupied
by the link and of sufficient width and depth to allow the insertion of a sufficient
portion of a plate of suitable material so adjusted as to lie flat on tho outside of the
link and to engage in the chase or groove cut in the pin thus preventing the pin
being drawn or slipping through the hole in the link such plate being either itself a
spring or provided with a catch or other means of preventing its displacement when
once in position.
The plate is by preference so constructed as to engage on the two pins of the
same link but can be constructed so as to engage on only one.
The pin usually has a permanent head or button at one end and in that case the
chase or groove will only be cut at the opposite end and only that end will require
a locking plate.
The locking plate is preferably constructed of an elastic material the whole or
part of which forms a spring catch which suffices to keep it in its place after looking
the pin but so that a certain amount of force must be used in order to remove the
plate.
Dated this 1st dex of January 1905
***
CHARLES J. CHUBB
COMPLETE SPECIFICATION.
Improvements in Chains for Gearing.
I CHARLES JOHN CHUBB 212 Cornwall Road Notting Hill London 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:-
My invention has for its object the construction of pitch-chains without any
screws or rivets in such a way that they can be taken apart and put. together
without any injury to the chain and yet cannot fall apart or become disconnected
accidentally without force.
The invention applies to almost every kind of pitch-chain which is constructed of
links and pins or bolts.
}
The invention consists in the peculiar construction of the end or ends of the pin
or bolt and in the provision of a locking plate.
The bolts or pins (hereinafter referred to as pins) have, at one or both ends, an
annular chase or groove out at right angles to the pin just outside the part occupied
Pine S

page_text: by the link and of sufficient width and depth to allow the insertion of a sufficient
portion of a plate of suitable material so adjusted as to lie flat on the outside of the
link and to. engage in the chase or groove cut in the pin thus preventing the pin
being drawn or slipping through the hole in the link such plate being either itself &
spring or provided with a catch or other means of preventing its displacement when
once iu position.
The plate is by preference so constructed as to engage on the two pins of the
same link but can be constructed so as to engage on only one.
The pin usually has a permanent' head or button at one end and in that case the
chase or groove will only be cut at the opposite end and' only that 'end' will' require
a.looking plate.
ا,
The locking plate is preferably. constructed of an elastic material the whole or
part of which forms, a spring catch which suffices to keep it in its place after
locking the pin but so that a certain amount of force must be used in order to
remove the plate..
Having thus described the nature of my invention I will proceed to describe the
annexed drawings in order, to shew, more fully how the same may be carried! into
effect.
The drawings are upon an enlarged scale.
Fig. 1. represents a side view of a pitch-chain to which my invention is shewn
applied and will suffice together with the other diagrams to shew how the same may
be applied to most chains constructed of links fastened transversely by pins or
rivets.
Fig. 2 is a section taken along the line z Fig. 1, shewing the construction of the
ends of the pins which engage the locking plates.
Fig. 3, 4, 5, 6, 7, 8 and 9 are various shapes of locking plates which may
be further varied. to suit the form or requirements of the links of the chain to which
my invention may be applied.
"
Figs. 1 and 2 shew the general. construction of a pitch-chain but particularly
the formation of the ends of the pins and the position' occupied by the locking
plates.
A. A, A, A, are pius each with a head (a) at one end and a groove (a) at the
other. This groove is preferably cut or formed completely round the pin but it'
inay only be partially around the pin and should in width exactly fit the thickness
of the locking plate the position of the groove in the pin is determined by the
width of the chain the groove should lie immediately outside the outer plate; of the
link so that the locking plate on entering the said groove may hold the parts firmly
and closely together.
The locking plates B. B₁ shown in place on the chain in Figs. 1 and 2 are
represented respectively by the drawings Fig. 3 and 4. Parts of these locking.
plate are so constructed that they enter the grooves (a) in the pins and having so
entered they secure. themselves in position by clasping the bottom of the groove
into which such parts have been forced; as will be explained on reference to
Figs. 3 and 4.
·
On comparing Figs. 3 and 4 with B and B₁ Fig. 1 it will be seen that the 4 pios
'are clasped in their grooves by the spring ends of the 'locking plates and the plates
are thus held secure until sufficient force is used in the necessary direction to expel
them from the said grooves.
3
Fig. 3 is a locking plate one end (bb) of which is so constructed that when it is
forced into the groove (a) of the pin the parts (6.6) are 'sprung apart and close
again upon the pin when the same is home in the aperture (b) and 'in so closing
upon the pin secures the plate in its place as shewn in Figs. 1 and 2 on the
pin (A).
:!
The other end of the locking plate has an aperture (b) also made to fit the
bottom of the groove (a,) the entrance to which aperture (b) is narrowed by the
spring (b). When the locking plate (Fig. 3) is swung round on the pin (A) until
the entrance (6) of the locking plate takes into the groove (a) of the pin.(A₁)

page_text: then by forcing the plate further in the same direction the spring (b) will be-
sprung aside and the edges of the aperture (ba) will take into the groove (a,) and
the part (b) will return into its place and clasp the pin when the locking plate will
be securely upon the pins (A and A,) and the link will be securely fastened.
together.
Fig. 4. is a modification of Fig. 3 having both the apertures (b, and b) with.
entrances from the side of the plate partially closed by springs (b and b,) which.
clasp the pin when in place as before described.
Fig. 5. Instead of a spring at the end (b) it has and aperture (61) large enough to
pass over the end of the pin when the smaller aperture (b) can be drawn into the
groove and its edges will take into the groove (a) of the pin, when home the other
end (b) of the plate may be swung into place being similarly constructed to the
end (b) of Fig. 3.
Fig. 6 has one end similar in construction to (bb) of Fig. 3. but the other end
has an aperture which is a little more than a semicircle the edges of which will fit.
into the groove (a₁).
To put this plate into place the end (bb) should first be forced home into the-
groove (a) of one pin then the plate must be bent or arched up until the
parts (b, and b) are brought in front of the groove:(a) in the other pin when
the plate being loosened the plate will spring back to its normal flat position and
the edges of the aperture (b) Fig. 6 will enter the groove (a) of the pin.
Fig. 7 represents two separate locking plates one for each pin the parts (6.6) are-
sprung apart on the plate being pushed into the groove (a) because of the.
narrowed entrance and when the plate has been pushed home the edges of the
aperture (ba) take into the groove (a) of the pin the parts (66) return and clasp-
the pin so bolding the plate in place and securing the link.
Fig. 8. The end (66) is the same as in Fig. 3 the other end has a spring.
catch (b) when the end (6 b) has been fixed in place as described the other end (63).
is swung round and the sides (b. b) of the aperture (63) are entered into the-
groove (a) the spring (b) being pressed up by the end of the pin and when the
plate shall have been pushed home into the groove (a) the spring (b) will return
to its place and close the ontrance of the aperture (63) thus preventing the plate.
from being slid out of position.
Fig. 9 shews a locking plate upon a link plate the end (bb) is similar to the
end (b) in Fig. 3 and the end (bs) is similar to (b) in Fig. 3 except that the
entrance (b) is not narrowed and it is furnished with a spring (b) when the end (bb).
of the plate is in position the end (b) is swung round when the spring (66) is raised
from the link plate by the lug (b) on the underside of the spring, when the end (ba).
bas been pushed into place the spring (b) returns its place and the lug (b) clasps
the side of the link plate and so secures the locking plate.
Several other shapes of locking plates may be designed for the same purposes.
may clasp the pins or link plates by springs placed in various positions but.
I consider by the accompanying drawings I have sufficiently shewn and indicated
the manner in which my invention can be performed.
The looking plates may as above stated be applied on both sides of the chain
although for convenience I have shewn them applied to one side only.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same may be performed I declare that what I
claim is:
The application and use of a locking plate for gearing chains in combination
with the groove or grooves in the pins for the purposes and in the manner
substantially as herein described.
Dated this 31st dev of October 1805
CHARLES J. CHUBB.