Improvements in Pitch Chains for Driving and other Purposes and in the Manufacture of the same.
Year: 1892

page_text: Date of Application, 17th Aug., 1892
Complete Specification Left, 17th May, 1893-Accepted, 12th Aug., 1893
PROVISIONAL, SPECIFICATION.
Improvements in Pitch Chains for Driving and other Purposes and
in the Manufacture of the same.
I EDMUND NICOLAS of Number 22 Booth Street, in the City of Manchester,
County of Lancaster, Designer, do hereby declare the nature the nature of this
invention to be as follows
My invention relates to the class of detachable pitch or driving chains that is to
say to the chains which are composed of links adapted to be connected together
without the necessity for the use of rivets, screws or bolts.
be
Any required number of links formed in accordance with my invention may
readily and quickly linked or connected together so as to form a chain of the
required length or proportions.
Each link of the chain comprises a cross bar formed with end gudgeons and with
two cranked and slotted arms these parts being preferably formed in one piece.
The slots in the arms are made of such form and proportion as that when the cross
bar end of one link is passed between the arms of another link the two gudgeons
can be passed into the slots by turning the link which is being added so that when
the two links are drawn into line the gudgeons take their bearing in the semi-
circular ends of the slots.
By adding link after link a chain of the required length is produced and by
connecting together the first and the last link in the series in the same manner an
endless chain is obtained when required.
The links may be made of iron, steel, brass, gun metal, bronze or other suitable
metal or alloy by casting, forging, stamping or pressing or by suitable means.
For some purposes the links may be put together without being tooled but when
desirable the gudgeons may be turned or be finished with the aid of revolving
cutters and tooled or finished bearings may be formed at the bearing ends of the
slots. The links may when desirable be otherwise finished by means of tools or
grinders and in some cases may be case-hardened or be hardened and tempered.
In some cases bowls might be mounted upon the gudgeons. I may in some cases
mount bowls upon the cross bars such bowls being produced by bending sheet
metal or U shaped blanks in position upon the cross bar and moulding the same
into form by means of dies in the cases wherein the links would be formed each in
one piece.
My improved chain can be readily produced of the required length and when
extended by wear can be quickly shortened special connecting links not being
required.
As the chain is formed without pins loose links or washers it is not so liable to
get out of order as in the cases of ordinary pitch or driving chains. The cross
bars and links may be made of any suitable form according to the requirements
and when required the links may be adapted to receive or to be readily attached to
elevator buckets trays or other parts so as to dispense with the necessity for
special links.
Dated this 16th day of 1900
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Pitch Chains for Driving and other Purposes and
in the Manufacture of the same.
I EDMUND NICOLAS of Number 22 Booth Street, in the City of Manchester,
County of Lancaster, Designer, 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 and accompanying drawings:-
My invention relates to the class of detachable pitch or driving chains-that is to
say to the chains which are composed of links adapted to be connected together
without the necessity for the use of rivets, screws or bolts.
Any required number of links formed in accordance with my invention may be
readily and quickly linked or connected together so as to form a chain of the
required length or proportion.
Each link of the chain comprises a cross bar formed with end gudgeons and with
two cranked and slotted arms these parts being preferably formed in one piece.
The slots in the arms are made of such form and proportion as that when the
cross bar end of one link is passed between the arms of another link the two
gudgeons can be passed into the slots by turning the link which is being added so
that when the two links are drawn into line the gudgeons take their bearing in the
semi-circular ends of the slots.
By adding link after link a chain of the required length is produced and by
connecting together the first and the last link in the series in the same manner an
endless chain is obtained when required.
The formation of my improved chain is clearly illustrated by the accompanying
drawings.
In the said drawings, Figs. 1 and 2 represent a chain link formed in accordance
with my invention.
Fig. 3 illustrates the method of connecting the links together.
Figs. 4 and 5 represent a short chain composed of four links of the form
illustrated by Figs. 1 and 2.
Each link in the example is supposed to be made in one piece and comprises a
cross bar a formed with end gudgeons a¹ and two arms b b which are cranked
outward so that the width of the space at c is a little greater than the length of the
cross bar a. Each arm is formed with a slot as seen at d in Fig. 2 and these slots
are made long enough to permit of the linking together of the separate links so as
to constitute a chain-that is to say the links are so formed and proportioned as
that when the cross bar end of one link is passed between the arins of another link
the added link being held at right angles with the other link or thereabouts or out
of line with the same the two gudgeons of the added link can be passed into the
slots in the other link as indicated in Fig. 3.
The added link being turned square with the other link and brought down into
line with the same the links will be connected together in the manner indicated in
Figs. 4 and 5. As many links as may be necessary to constitute a chain of the
required length can be quickly put together and if an endless chain be required the
first link of a connected series is caused to engage with the last link.
When a
chain has become extended by wear a link can be quickly withdrawn so as to
shorten the chain.
The links may be made of iron, steel, brass, gun metal, bronze or other suitable
metal or alloy by casting, forging, stamping or pressing or by suitable means.
For some purposes the links may be put together without being tooled but when
desirable the gudgeons may be turned or be finished with the aid of revolving
cutters and tooled or finished bearings may be formed at the bearing ends of the
Blots.

page_text: The links may when desirable be otherwise finished by means of tools or grinders
and in some cases may be case-hardened or be hardened and tempered.
In some cases bowls might be mounted upon the gudgeons.
I may in some cases mount bowls upon the cross bars such bowls being produced
by bending sheet metal or U shaped blanks in position upon the cross bar and
moulding the same into form by means of dies in the cases wherein the links would
be formed each in one piece.
As the chain is formed without pins, loose links or washers it is not liable to get
out of order as in the cases of ordinary pitch or driving chains.
The cross bars and links may be made of any suitable form according to the
requirements and when required the links may be adapted to receive or to be
readily attached to elevator buckets, trays or other parts so as to dispense with the
necessity for special links.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. A chain composed of links formed and adapted to be linked together
substantially as set forth and indicated.
2. A pitch chain composed of metal links each having a cross bar and gudgeons
and two slotted arms so proportioned as to enable the links to be caused to engage
with one another or to be linked together substantially as set forth and
indicated.
3. The metal link of the formation substantially as and for the purpose set
forth and indicated.
Dated this 16th day of May 1893.