вход по аккаунту


Патент USA US3079615

код для вставки
March 5, 1963
3,079,609 -
Filed Dec» 30. 1959
10H9 l3\ l2) ¿EN 12)/3) ,/3 /16 /8 2
159 :5il
George R.Hoffmaster
George R. Hoffmaster, Reading, Pa., assigner to The
Electric Storage Battery Company, Philadelphia, Pa.
Filed Dec. 30, 1959, Ser. No. 862,982
2 Claims. (Cl. 2_8)
This invention relates to a headgear assembly for
pivotally supporting or suspending a welding shield or
helmet or other face protective device, and, more particu
Patented Mar. 5, 1963
rivets 16 or the like, a pair of leaf springs 14. To the
free ends of leaf springs 14 are rigidly secured, by means
of rivets le or the like, linger pieces 13 of metal or other
suitable material. Integral pawl or dog portions 12 ex
tend vertically upwardly and downwardly from linger
pieces f3 and are adapted to engage ratchet teeth l1.
In operation, when either linger piece 13 is grasped
and pulled outwardly, it will flex its leaf spring 14 and
will free its pawl portion'12 from the ratchet teeth,
thereby enabling pulling of the linger piece 13 horizon~
usually of complicated and expensive construction, which
tally in the direction of the longitudinal slot 10 until the
desired girth adjustment of the headband 2 is obtained.
The 1in-ger piece 13 is then released, whereupon leaf spring
14 will automatically return and hold pawl portion 12 in
engagement with the newly selected ratchet teeth. The
same type of adjustment is obtainable with either of the
not only increases manufacturing costs but is time con
linger pieces. Actually both finger pieces can be pulled
larly, relates to adjusting means therefor.
An outstanding disadvantage of conventional headgear
suspensions for welding shields or helmets is that the ad
justing means for adjusting the girth of the headband is
suming to effect adjustment.
out simultaneously, if desired, with both thumbs and fore
An object of the present invention is to provide a
ñngers (or even with one thumb and foreñnger) to en
novel headband suspension for pivotaily supporting a 20 able very fast as well as accurate adjustment of the girth
welding sheld or helmet in an adjustable manner and
of the headband to iit the headsize of the wearer. The
which overcomes the above named disadvantages of prior
limit of the adjustment is the end portions of slot lil
which serve to limit outward movement of the respective
A more specific object of the invention is to provide,
finger pieces i3.
in a headgear for suspending a welding shield or helmet, 25
A pivotal adjustment 6, extending through holes on
a simple and inexpensive means for adjusting the girth
opposite sides of the helmet, is for the purpose of varying
of a headband by the simple expedient of pulling out a
the degree of frictional engagement between extensions 5
spring finger piece and shifting it laterally into engage
and welding helmet l, which is shown in more detail in
ment with any one of a plurality of ratchet teeth.
the exploded View of FIG. 5. It comprises a shank 15a
Other objects and advantages will become more ap 30 having an integral head 1S to serve as a stop for one end
parent from a study of the following description taken
of a helical spring 17 which surrounds the shank 15a.
with the accompanying drawing wherein:
Half of the shank is cut-away at 15C and the remainder
FIG. l is a rear perspective view of a headgear assem
is threaded at lib. The threaded portion extends through
bly for supporting a welding helmet and embodying the
a cup washer i3 and through a correspondingly shaped
principles of the present invention;
hole 1% formed in an integral square extension ign of
FIG. 2 is an enlarged, rear view of the .girth adjusting
washer 19, also it projects through a hole in washer 2i)
means thereof;
so that the threaded portion l‘â'b threadedly engages
FiG. 3 is a horizontal cross-sectional View taken along
thread 2lb of an adjusting nut 2ï. Nut 21 has a collar
line lll--Hl of FIG. 2;
portion Zia which abuts against washer Ztl. The side of
FiG. 4 is a vertical cross-sectional View taken along
welding shield it extends between washer i8 and washer
line lV-IV of FIG. 2; and,
ii Thus by tightening nut 2l, spring 17 is compressed
FlG. 5 is an exploded view of the pivotal adjusting
to provide a greater amount of friction between washers
means 6 shown in FiG. l`
13 and i9 and the side portions of shield 1 therebetween.
Referring more particularly to FiG. 1 of the drawing,
This provides an easy adjustment which can be made
numeral l denotes a weldinl7 helmet or shield shown in
from the outside of shield l for the purpose of varying
dash and dot outline since it, per se, forms no part of
the amount of resistance against pivotal movement of the
the present invention. Gther face protective devices may
shield, enabling the shield to be frictionally held in any
be suspended instead by the present invention.
desired pivotal position relative to the crown strap.
Helmet 1 is pivotaliy suspended by a headgear com
lt will be understood that one of the linger pieces may
prising a headband 2 in the form of a ilexible strap of
be omitted, together with its associated parts, and the
plastic or other suitable material, the end portions of
associated end of the headband strap may be rigidly se
which project partially into a flat tubular element S of
cured to tube 8 if sufficient adjustment can be had with
arcuate shape, preferably of the same material, forming
one finger piece.
part of the girth adjusting means 3.
Thus it will be seen that I have provided an eñicient
A crown strap é, also preferably of the same plastic
headgear suspension for a welding shield or helmet and
material as strap 2 and tubular element S, has end portions
which is also suitable for pivotally suspending a face
which are riveted or otherwise fastened to diametrically
shield, goggles or any other face protective device, in
opposite side portions of headband 2. Lateral extensions
cluding adjusting means to enable easy adjustment of
5, preferably reinforced by metallic strips 5a partially
wrapped therearound, are riveted or otherwise fastened
to opposed portions of crown strap 4 to serve as spaced
flexible supports onto which shield l is pivotally mounted
by nut assemblies 6, which provide adjustable friction be
tween shield 1 and extensions 5.
The girth adjusting means is more clearly illustrated in
FIGS. 2, 3 and 4 and comprises a thin metallic strip 9
molded or riveted at its corners to the flattened, slotted
tube S, which strip is provided with au elongated slot 10,
60 frictional resistance against movement, as well as to en
able easy adjustment of the girth of the headband so that
it may be ñtted to the head size of any wearer by the mere
pulling out and lateral shifting of linger pieces; further
more, l have provided a headband adjustment comprising
65 a minimum number of simple and inexpensively manu~
factured parts, which adjustment may be operated easily
and very quickly by the lingers of the wearer to increase
or decrease the headband size.
While I have illustrated and described a single speciñc
the top and bottom portions of which slot are defined by 70 embodiment of my invention, it will be understood that
ratchet teeth 11 which are integral with strip 9. To the
this is by way of illustration only, and that various changes
ends of headband straps 2 are attached, by means of
and modifications may be made within the contemplation
2. In a headgear assembly for pivotally supporting a
face protective element, comprising a headband strap, an
arcuate flattened tube into which the end portions of said
headband strap project, a pair of leaf springs, each hav
ing one end connected’to an" end portion of said head
band and extending longitudinally inside 'said‘tube, an
elongated slot formed on the outside portion of said tube,
~VÃafiinger piece 'connected to the otherend of each leaf
of my invention and within the scope of the following
I claim:
w -`l. -in a headgear assembly Yfor pivotally supporting a
faceprotective device, vcomprising a headband strap and
a crown Vstrap having ends connected to diametrically op
_posite side portions of said headband strap, an arcuate,
Yiiattene'd tube into which the end portions of said head
spring and-extendingl through the slot and having-a pawl
portion, ratchet `teethfprojecting along the longitudinal
band strap project, a leaf spring having one end connected
¿to an extremity `of the headband and extending longitu
dinally inside said tube, an elongated slot formed on the
edge portions oiî~said` slot and-'being oppositely shaped
outside portion of said Aflattened tube and of greater width
than the leaf spring, a metal strip attached to the outside
of said ñattened tube, said metal-strip having a longitudi
Vwhen both saidñnger pieces are squeezed >together and
vnal slot coinciding withl said elongated slot, ratchet teeth
integrally formed along the top and bottom edges of said
f‘longitudinal slot in said metal strip :and extending out
with relation to the center of saidslot ina 4manner so that
thenreleased the 4pawl Yportions thereof will become
15 latched to teeth >closer to thecenterofY the slotrso asto
. reduce v.the .girth .of saidy headband.
.Í Rëferei'amas'? Cited in" Vthe'îiile of' thisfpat‘ent
-wardly' thereof, a‘iingerpiece:projectingirom the outside
Yinto saîdfslot vancilhavingan inner end rigidly secured to
ïthe’free-end of saidl leaf spring, said vfinger pieceV having
va pair of'laterally ‘extendingpawl portions for engaging
>said top and bottom ratchet teeth, whereby upon pulling
said tin-ger piece outwardly, said pawlportions are re
tracted from Ysaid teeth against the tension of said leaf
spring- to enable shifting of Ithe’tìnger-piece in the longi
tudinal 'directionof the sloty to vary the extentof projec
~ltion of an end portion of the headband into the flattened
tube, thereby varyingtheA girth of the headband.
Без категории
Размер файла
308 Кб
Пожаловаться на содержимое документа