Improvements in the Straddles or Van Pads of Draught Harness.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Straddles or Van Pads of Draught Harness.
I, FRANCIS HAMILTON PARKER, of Blundell Hill, Hillsborough, in the County of
Down, in Ireland, Gentleman, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the construction of straddles employed in draught
harness and consists in the use of rollers to carry the chain or band supporting
the shafts of the cart or other vehicle to be drawn.
For this purpose I substitute for the grooved convex rib now commonly used
a number of transverse rollers carried between the sides of a convex rib or between
two convex plates or bars attached to the straddle in the ordinary or other suitable
way, and I furnish such rollers with journals or discs at the ends of their axles or
studs and enclosed within circular boxes or chambers provided internally in the
convex rib, plates or bars, but I may arrange such rollers in other well known
ways.
The convex rib, plates or bars may be made in longitudinal sections for better
obtaining access to the boxes or chambers and journals or discs and for removing
or replacing the rollers when occasion may necessitate the doing so.
The internal journals boxes or chambers communicate with each other by a
channel or groove which I provide-for-the-passage-of-oil-to-lubricate the discs."
Dated this 12th day of October 1898
HUGH HYNDMAN,
10, Chichester Street, Belfast, Agent for the Applicant.
Improvements in the Straddles or Van Pads of Draught Harness.
I, FRANCIS HAMILTON PARKER, of Blundell Hill, Hillsborough, in the County of
Down, in Ireland, 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 the construction of straddles employed in draught
harness and consists in the use of rollers to carry. the chain or band supporting
the shafts of the cart or other vehicle to be drawn.
For this purpose I substitute for the grooved convex rib now commonly used
upon straddles and van pads a number of transverse rollers carried between the
sides of a convex rib specially grooved or recessed to contain such rollers or
between two convex plates or bars attached to the straddle or pad in the ordinary
FD071

page_text: or other suitable way such as by lugs screwed to the inner boards or frame of the
straddle or pad And I may furnish such rollers with collars or discs at the ends
of their bearings and enclosed within circular chambers provided internally in
the convex rib, plates or bars or I may arrange them in other well known ways.
I have, however, found by experience in the practical construction and application
of my invention that it is preferable to dispense with the chambers I have
mentioned and mount the rollers upon axles threaded at each end and passing
through the sides of the rib or the convex plates or bars attached to the straddle
or pad, in which sides they are held firmly by external nuts. And I recess both
ends of the rollers to receive metal cups in which I place steel balls confined by
means of a short cone shaped cover or lid fitting into the mouth of the cup but
with space between the inner, cone shaped face and the cup for the free action of
the steel balls. This cover or lid is threaded to the same pitch as the end of the
axle and may be moved along it and adjusted upon it at the point which will
secure the minimum of friction, the thread of the axle being continued a little
way towards its centre so as to permit the screwing of the cover or lid further
into the cup and roller.
If circular chambers be adopted the convex rib, plates or bars may be made in
longitudinal sections for better obtaining access to such chambers and the collars
or discs and for removing or replacing the rollers when occasion may arise to
necessitate doing so. And these chambers and bearings may be made to communicate
with each other by a channel or groove which I provide internally within the
sides of the convex rib or in the convex plates or bars carrying the rollers for
the passage of oil to lubricate the collars or discs and bearings. But the greater
friction incidental to that arrangement of rollers makes the adoption of it less
advantageous or desirable.
And in order that my said invention may be more fully understood I shall now
proceed to refer to the drawings on the sheet hereunto annexed the same letters
of reference indicating the same or corresponding parts throughout all tho
figures thereon.
Fig. I is an inner view of one side of the grooved convex rib employed by me
or of the inner side of one of the convex plates or bars shewing the transverse
rollers which revolve upon axles carried by the plates or bars, and lugs for secur-
ing the rib, plates or bars to the inner boards or the frame of the straddle or pad.
Fig. II is a cross section on the line A B on Fig. I looking towards C and show-
ing one of the rollers carried between two convex plates or bars on an axle and
two of the lugs attached to such plates or bars.
Fig. III is a sectional view of a roller and axle with the cups, cone shaped covers
or lids, ball bearings and external nuts.
Fig. IV is an outside view of a convex plate or bar in longitudinal sections to
give access to the internal circular chambers which are indicated by outer dotted
circles and carrying rollers provided with discs to support them in such chambers,
which discs are indicated by inner dotted circles.
Fig. V is a cross-section on the line D E on Fig. IV, shewing a roller arranged
with discs set in circular chambers formed in plates or bars such as are shewn
in Fig. IV and
Fig. VI, is a separate view of the roller shewn in Fig. V.
is the inner side of a rib or one of the plates or bars: b, b, are rollers for
carrying the chain or band which supports the shafts of a cart or other vehicle;
c is an axle threaded at each end and held firmly in the sides of the rib
or the
convex plates or bars by the external nuts d, d; e, e, are metal cups fixed in the
recess at the ends of the rollers as shewn in Fig. III; f, f. are short cone shaped
covers or lids fitting into the mouths of the cups e, e, and threaded on the inner
edge to the same pitch as the ends of the axle c: g, g, are steel balls lying between
the cups, e. e. and the cone shaped face of the covers or lids, f, f: h, h, are the collars
or discs at the ends of the journals e, e, in connection with the convex bars or
plates shewn in Fig. IV, and i, i, are the circular chambers in the plates or bars

page_text: shewn in Figs. IV and V. in the longitudinal sections a¹, and a²; and 1, l, are lugs
to be screwed to the inner boards of the frame of the straddle or pad.
Having now fully described and ascertained the nature of my said
invention and in what manner the same is to be performed I would have it to be
understood that I do not claim as of my invention nor the exclusive use of ribs,
plates or bars arranged with rollers except when the same are constructed specially
and employed for carrying the chain or strap which supports the shafts of a cart
or other vehicle according to my invention, nor do I claim the use of collars or
discs journals, or bearings axles or studs, internal chambers, cups, cone shaped
covers or lids with ball bearings or any of the separate mechanical parts of my
improved straddle or van pad but I declare that what I claim is
1. The use in the straddles or van pads of draught harness of a convex rib or
convex plates or bars arranged with rollers substantially in the manner and for
the purposes herein before described and shewn in the drawings hereunto annexed,
and
2. The combination and arrangement of parts constituting my improved attach-
ments to a straddle or van pad constructed and employed substantially in the
manner and for the purposes herein before described and illustrated in the draw-
ings hereunto annexed.
Daad 4th: 1141.
fT..1.. 1000
HUGH HYNDMAN,
2, Wellington Place, Belfast, Agent for the Applicant.