Improvements in Pitch Chains.
Year: 1893

page_text: Date of Application, 7th Oct., 1893
Complete Specification Left, 7th July, 1894-Accepted, 11th Aug.,
1894
PROVISIONAL SPECIFICATION.
Improvements in Pitch Chains.
I EDMUND NICOLAS of The Studio, Chorlton-cum-Hardy, near Manchester,
in the County of Lancaster, Designer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to the pitch chains adapted to be used in the transmission
of rotary motion and particularly to detachable link chains which are made up of
parts which can be linked together and which can be readily separated.
My improved chain is composed of H shaped units which are connected together
by means of side links.
Each of the said units has a central bar or block which is provided with four
pins or studs which project in pairs in opposite directions from the said central bar
and are formed with heads the whole being formed in one piece. I prefer to form
these units from steel or wrought iron by stamping or pressing the metal in dies.
The heads upon the pins may be flat sided or round.
When forming the heads with flat sides such sides are made about flush with the
body of the pin and are arranged to be at right angles with a line drawn through
the centres of the pins or thereabouts or at an angle which does not coincide with
a line passing through the connections when the chain is at work. The side links
are formed with round ended slots which are a little wider than the least width
of the flat heads.
The parts are put together by passing the links over the flat sided heads and
drawing the links down into line.
The links cannot slip off whilst the chain is in use.
The links may be stamped out of sheet steel or metal or be pressed in dies and
may be of uniform thickness or be thickened at the ends where they bear upon
the pins.
When the pins would be formed with round heads the slot in each link would
have a central enlargement or expansion to enable the link to be passed over the
pin heads. When the chain is in use the teeth of the chain wheels bear against the
ends of the central bars of the said units.
Dated this 6th day of October 1893.
E. K. DUTTON & CO.,
5, John Dalton Street, Manchester, Agents.
COMPLETE SPECIFICATION.
Improvements in Pitch Chains.
I EDMUND NICOLAS of The Studio, Chorlton-cum-Hardy, near Manchester,
in the 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 pitch chains adapted to be used in the transmission
of rotary motion and particularly to detachable link chains which are made up of
parts which can be linked together and which can be readily separated.
To render the construction of my chain readily understood I will refer to the
annexed sheet of drawings which clearly illustrate the formation and construction.
Price di

page_text: my
Fig. 1 is a side view of the "H" shaped block referred to in Provisional
Specification.
Fig. 2 is a plan of the same.
Fig. 3 is a side view of a side link for connecting the blocks together.
Fig. 4 shows the block and side link in the act of being connected.
Fig. 5 is a side view of a portion of chain composed of the aforesaid parts.
Fig. 6 is a plan view of Fig. 5.
The "H" shaped blocks are marked A.
Each of the said blocks has a central
bar or part a which is provided with four pins or studs a' a' a¹ a¹ which project in
pairs in opposite directions from each end of the said central bar a and are formed with
heads a the whole being formed in one piece. I prefer to form these blocks from
steel or wrought iron by casting or stamping or pressing the metal in dies.
The heads upon the pins are preferably flat sided as shown.
heads with flat sides, such sides are made about flush with the
appears in Fig. 2.
When forming the
body of the pin as
The side links B are of flat metal and are formed with round-ended slots b of a
size which will permit entrance of the flat sided heads a* of the blocks A.
The parts are put together as shown in Fig. 3 by passing the links over the flat
sided heads and drawing the links down into line.
The projecting ledges of the pin heads a' then bear upon the margins of the slots
.and the links cannot slip off whilst the chain is in use.
Figs. 5 and 6 show the blocks and links connected up into a chain.
The side links B may be stamped out of sheet steel or metal or be pressed in
dies and may be of uniform thickness or they might be thickened at the ends where
they bear upon the pins.
If the pins a' were formed with round heads, the slot in each link would have a
-central enlargement or expansion to enable the link to be passed over the pin
heads. When the chain is in use the teeth of the chain wheels bear against the
ends of the central bars a of the said blocks A.
The chain is easily detached or taken apart by an inversion of the hereinbefore
.described process of putting together.
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.
The improved detachable pitch chain composed of blocks or units A having
projecting pins or trunnions a¹ at each end with flat sided (or it might be round)
heads, in combination with slotted side links B the said parts being capable of
easy attachment and detachment as hereinbefore described and as shown.
Dated this 6th day of July 1894.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.