Improvements in or relating to the Fittings of Pneumatio Tyre Valves.
Year: 1899

page_text: Date of Application, 31st Oct., 1899
Complete Specification Left, 14th May, 1900-Accepted, 23rd June, 1900
PROVISIONAL SPECIFICATION,
Improvements in or relating to the Fittings of Pneumatio Tyre
Valves.
I, CHARLES THOMAS BROCK SANGSTER, General Manager to The Cycle Com-
ponents Manufacturing Company, Limited, of Bournbrook, near the City of
Birmingham, do hereby declare the nature of this invention to be as follows:-
-;
This invention relates to the fittings of pneumatic tyre valves, and has for
its object, to provide for the locking or affixing of certain screwed-on parta,
such as the union ring by which the stalk is secured to the body of the valve,
and the lock nut by which the said body (whose inner end is attached to the
tyle) is secured to the said m
'
Usually such wormed elements are simply run home upon the outside-threaded
parts of the body and are only held there by the frictional adhesion created
by screwing the said parts up tight, but this method is defective, as the constant
vibration to which a machine is subjected tends to loosen the screwed on rings
and nuts, so that readily back off from then assigned positions and so become
ineffective
I will describe the application of my invention to a valve of the type usually
fitted to "Dunlop" tyres and which comprises an outside screwed tubular body,
having an internal valve seating or contraction, and adapted to be passed
through the wheel rim, with the head end coming inside and being connected
to the tyre, and a loose and hollow stalk, one end of which is provided with the
au inlet and is enclosed in a rubber valve sleeve, and the other end 19 screwed
to receive the inflator connection whilst a middle portion is provided with a
pair of key studs or short vertical bs adapted to engage with corresponding
gaps in the upper open of the body when the stem and body parts are drawn
together by means of an inside-sciewed union ring having an internal flange
or shoulder bearing against the ends of the aforesaid ribs on the one part and
taking onto the wormed outer end of the other part The whole valve is secured
to the m by a lock nut threaded onto the body and bearing (when screwed
fully home) against the inner periphery of the wheel um.
Now owing to the head end of the valve body taking against the walls of
the tyre, there is a slight iesilience lengthwise of the article, and likewise owing
to the elasticity of the valve sleeve, the stem has a similar resilience or tendancy
to slide outwards within the body, and I propose to make use of these resilient
properties in forming snap-action fastenings for holding them in their tightened
up or forced-home positions.
In applying my invention to the union ring, the inside of the annular shoulder
or flange is notched or formed with a series of sinkings coresponding to the
breadth of the keys or keeper-ribs of the valve stem The raised parts between
the sinkings are slightly inclined to facilitate the passing or snapping of the
nb ends from one sinking to the other when the union ring is being screwed
.

page_text: home, this snapping being effected by the stem first cushioning or yielding
(through the elasticity of the sleeve) to the pressure exerted by the raised parts
of the union and then being forced outward by the expansion of the compressed
ubber, thus taking the ribs into engagement with a pan of the sinkings, thus
effectually locking together the stem and body and preventing the backing off
of the union ring by mere vibration, although the same can readily be un-
screwed by the application of moderate force
In valves where no rubber sleeve is used, then a separate rubber washer, or
a spring, or a resilient metal washer may be employed for giving the reaction
snap
In applying my invention to the rum lock nut, the face or end which comes
against the rim is cut with a pan of semi-circular gaps collesponding to the
middle channel around the 11m, so that when the nut is screwed home the gaps
snap over the annular 1b formed by this channel, or by a separately formed
or attached short rib or its equivalent and be held in such engagement by the
reaction of the rubber keeping the said gaps onto the rib In this case also, I
may use a iesilient ubber, leaker, metal or other spring washer to obtain the
desued result, independent of the resilience of the tvre itself
I wish it to be understood that I do not confine myself to the particular
forms of catches on snap-action fastenings employed, so long as one part has
depressions engaged by projections on the other nait and kept in such engage-
ment by a spring re-action
Doiod this 30th or of Oatalan 1800
Improvements in or relating to the Fittings of Pneumatic Tyre
Valves.
I, CHARLFS THOMAS BROCK SANGSTFR, General Manager of the Cycle Com-
ponents Manufacturing Company, Limited. Bouinbrook, ΠΡΩΙ the City of
Birmingham, 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 relates to the fittings of pneumatic trie valves, and has for
its object, to provide for the locking or affixing of certain sciewed-on parts,
such as the union ng by which the stalk is secured to the body of the valve,
and the lock nut by which the said body (whose inner end is attached to the
inside tube of a tie) is secured to the said m
Usually such wormed elements are simply run home upon the outside-threaded
parts of the body and are only held there by the fictional adhesion created
by screwing the said parts up tight, but this method is defective, as the constant
vibration to which a machine in subjected tends to loosen the screwed on ungs
and nuts, so that they readily back off from then assigned positions and so
become ineffective
In the accompanying diawings, I have illustrated my invention as applied
to a valve of the well-known "Wood" type, such as are usually fitted to Dunlop
tyres
Thus, Figure 1 represents a side elevation of such a valve provided with my
improved fittings.

page_text: Figure 2 is another elevation of the said valve, but showing the 11m and tyre
to which it is attached in transverse vertical section upon the dotted line r,
Figure 1
Figure 3 represents a complete vertical section of the valve upon the dotted
line Figure 2.
Figure 4 shows a view of the valve in which the union ring of the stem is
drawn in section to show the arrangement of the means by which it is locked
to the body of the valve after being screwed home
Figure 5 represents, in vertical section, the several parts of the valve sepa-
rated or dis-assembled from one another
Figure 6 18 a horizontal section of the valve upon the dotted line, Figure 3
Figure 7 represents a horizontal section of the valve stem upon the dotted
line, Figure 5.
Figure 8 is a plan of the union ring or cap, showing the internal formation
thereof
1.
Figure 9 represents, upon an enlarged scale a part of the valve stem in eleva-
tion and a portion of its union ring in section.
Figures 10 and 11 respectively show a side elevation and an underside plan
of the valve lock nut separately, and upon the same scale as Figures 1 to 8
Figure 12 18 a view showing the said lock nut in the act of being screwed
home onto its stem
The same letters of reference indicate corresponding parts in the said
Figures 1 to 12 of the drawings
and
18
The valve represented in the said figures comprises an outside-screwed tubular
body a, having an internal valve seating on contiaction at and adapted to he
passed through a hole b¹, in the wheel run b, with the head end a², coming
inside and being connected to the inner tube of the tyre c, and a loose and
hollow stem o stalk d, one end of which is provided with the an inlet
is enclosed in a rubbei oi elastic valve sleeve e, whilst the other end
screwed to receive either the inflator connection on the dust cap f, whilst the
middle portion of the said stem is provided with a pair of key studs or short
vertical 1bs g, adapted to engage with corresponding gaps g in the upper open
end a³, of the body when the stem and body parts are diawn together by means
of an inside-sciewed union ring having an internal flange or shoulder h¹,
bearing against the ends of the aforesaid 11bs g on the one part and taking
onto the wormed outer end a³ of the other part The whole valve is secured to
the 11m by a lock nut 2 threaded onto the body a, and bearing (when screwed
fully home) against the inner periphery of the wheel rim b
Now owing to the head end of the valve body having an elastic bearing
against the walls of the tyre, there is a slight resilience lengthwise of the
article, and likewise owing to the elasticity of the valve sleeve, the stem has
a similar resilience, or in other words, the elastic valve acts as a sping the
constant tendancy of which is to force on slide the stem outwards within the
body, and I propose to make use of the resilient properties of these parts for
the purpose of obtaining snap-action fastenings for holding the union iing and
the lock nut in then tightened up or forced-home positions
In applying my invention to the union ng h, the internal annular shoulder
or flange at the outer end thereof is notched on formed with a series of sepa-
iated sinkings h², conresponding to the breadth of, and adapted to be engaged
by, the keys or keeper-bs 9, which are formed upon the valve stem for the
purpose of preventing its rotation within the body The raised part 4³ between
the sinkings are preferably slightly inclined or curved to facilitate the passing
or snapping of the b-ends from one unking to the other when the union ring
18 being screwed home, this snapping being effected by the non-rotatable stem
first cushioning or vielding inwards (through the elasticity of the sleeve e) to
the pressure exerted by the raised parts of the union and then being forced out-
wards by the expansion of the compressed rubber, which acts as a spimg for

page_text: taking the ribs into engagement with a pair of the sinkings, thus effectually
locking together the stem and body and preventing the backing off of the union
ring by mere vibration, although the same can readily be unscrewed by the
application of moderate force.
In valves where no rubber sleeve 18 used, then a separate rubber washer, or
a spring, or a resilient metal washer may be employed for giving the reaction
snap, which said elastic washer or spring may be interposed between an abut-
ment or shoulder on the body of the valve and an opposite shoulder or abut-
ment on the valve stem, or the equivalent thereof
In applying my invention to the im lock nut the face or end which comes
against the iim is formed with a pair of semi-circular gaps coresponding
and adapted to engage over the annulai bs formed by the middle well or
channel usually contained in the cross section of ordinary wheel rims, so that
when the nut 18 screwed home, the gaps snap over the said annular rib and are
held m such engagement by the reaction of the rubber of the tyre against
which the valve head is seated, acting as a spring for keeping the said gaps
onto the ib
In Figure 12, the lock nut is shown in the act of being acrewed home, and
with the gaps on the underside thereof just about to snap onto the rib of the
Tim
As a modification of this method of fastening I may provide the underside
of the nut with projections or swelled parts adapted to snap into engagement with
corresponding sinkings in the adjacent part of the im
In the case of 1m sections which have no annular well to form the rib for
the nut to lock with, a short 1b or beading of suitable section may be formed
upon or attached to the underside of the rim
I need not necessarily employ as part of the fastening, the keeper nibs which
prevent the relative rotation of the stem and valve body, as, if desirable, I may
provide the stem with separate projections to engage the sinkings in the union
ring o cap, and further, I may form the projecting parts on the inside of the
cap whilst the recesses with which they engage may be made within a collai,
shoulder or other part of the stem
Instead of relying upon the resilience on elasticity of the tyre to ensure the
snap action for locking these nuts, I may employ an independent resilient
rubber, leather, metal or other spring washer to obtain the desired result
Figure 13 represents an elevation of one aangement in accordance with
this last modification, in which an elastic oi vielding metallic washer is em-
ployed In this view the gaps of the lock nut are shown in engagement with
a rib upon the opposed face of the said washer
Figure 14 18 another view of this arrangement, but showing the nut disen-
gaged from the said washer
Figure 15 represents a cross section of Figure 14, upon the dotted line
looking towards the gapped side of the nut, whilst Figure 16 18 another section
taken upon the same line, but looking toward the washer.
Figure 17 18 an edge view of the sping washer separately
In the said Figures 13 to 15, a 18 the body of the valve which is to be secured
to the imb by means of the lock-nut 1, which 18 itself retained m its screwed-
home position through the medium of an elastic or spring washei threaded
upon the valve body and interposed between the lock nut and the im This
washer 18 prevented from 1otating by the hole within it conforming to the
flat-sided cross section of the valve body (see Figure 16) and is provided with
a pan of riba or projections, whilst the underside of the lock-nut has a pair
of corresponding depressions, which when the nut is screwed home, engage
with the ribs on the non-rotating washer and are kept in such engagement for
locking the nut by the aping re-action of the washer which is compressed
between the nut and the rim by the screwing up of the former.
As a modification of this arrangement I may provide the underside of the

page_text: lock nut with projections adapted to make snapping engagement with cories-
ponding depressions in the interposed non-1otating washer
I wish it to be understood that I do not confine myself to the particular forms
of catches or snap-action fastenings employed so long as one pait has depressions
engaged by projections on the other part and kept in such engagement by a
spring re-action.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is..
--
First In valves for pneumatic tyres, securing or locking the rim-nuts,
union rings and other sciewed parts in determined positions by snap-action
fastenings in which a projection on one part is made to engage with a depres-
sion on another part by the compression and re-action of a sping on elastic
bearing either in o1 of the valve itself, or the tyre, or a supplementary adja-
cent part
Secondly-In valves for pneumatic tyres, securing the ID lock nuts or
equivalent nuts in any determined position by a depression or extension of it
engaging with a corresponding extention or depression of the íim or equivalent
pait and being held in such engagement by the snapping re-action set up by
a part of the valve body cushioning or having its bearing against a part of the
tyre, or tyre cover, or other elastic impingement, substantially as beien des-
cubed and also as set forth in the accompanying diawings
Thudly-In valves for pneumatic tyres, locking on securing the union ng
to the body of the valve either through the medium of the elastic valve sleeve,
or through the medium of a separate interposed sping, adapted to actuate snap-
action fastenings between the said union ug and the valve stem or equivalent
non-1otating part of the valve, substantially as herein described and also as
set forth in Figures 1 to 8 of the accompanying diawings
Fourthly Invalves for pneumatic tyres, locking of securing the union
ring or cap to the body of the valve through the medium of the keeper ribs
or equivalent projections on the non-1otating valve stem snapping into engage-
ment with recesses formed in the interior of the said cap, which said snap-action
is created by the compression and re-action of the elastic valve sleeve, substan-
tally as herein described and also as set forth in the Figures 1 to 12 of the
accompanying drawings
Fifthly In valves for pneumatic tvies securing the m lock nut in its
screwed-home position through the medium of a non-rotating spring of elastic
washer disposed between the sund nut and the im and encircling the body of
the valve, with one or more projections on the one part adapted to snap into
engagement with coresponding projections on the other pait, substantially
as holem described and also as set forth in Figures 13 to 17 of the acconi-
panying diawings.
11.11......1000