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Патент USA US3074081

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Jan. 22, 1963
(5, z, EDWARDS ETAL
3,074,072
MECHANISM FOR MOUNTING A WELDING SHIELD ON HEADGEAR
Filed March 30, 1959
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INVENT0R§
GEORGE ZAHNOR EDWARDS
GEORGE A. LANGFORD
ATIORNEYS
hired
d?llhlz
Patented Jan. 22, 1.963
1
3,074,072
MECHANISM FQR MGUNTHN‘G A WEE. ENG
SEEM) 0N HEADGEAR
George Zahnor Edwards and George A. Langt'ord, both of
233 S. Fifth West St, Salt Lake City, Utah
Filed ll’iar'. 30, 1959, Ser. No. 8il2,996
2 Qlaims. (Cl. 2-8)
2
Referring to the drawing:
The Welders’ face-protective shield or helmet 10 of
FIGS. 1 and 2 is of one-piece, molded plastic construc
.tion. It is formed in generally customary fashion with
a crown Wall 11 for top-of-the-head protection, a front
wall 12. for face and eye protection, a window 13 in the
front wall, side walls 14 for side-of-the~head protection,
and a lower wall 15 for chin protection.
Our invention relates to face-protective shield and
Headgear 16 on which shield 10 is pivotally mounted
headgear combinations worn by welders, and is con 10
comprises a headband 17, with size-adjusting means 18,
cerned particularly with mounting mechanism by which
one is attached to the other.
Many different mechanisms for the purpose have been
developed heretofore.
They customarily provide for
and a crownband 19 with size-adjusting means 26?‘.
Pivotal mounting mechanism 21 extends outwardly from
one side of headgear 16 and pivotal mounting mechanism
22 extends outwardly from the other side. Such pivotal
pivotal movement of the shield or helmet, as it is often 15
mounting mechanisms 21 and 22 are equipped with
called, relative to the headgear—either headband or
respective wedge inserts 23 at their outer ends, providing
hard hat type—so such shield or helmet may be raised
for
quick and easy attachment to the shield 10 by insertion
from a work position in front of the face to a rest posi
of the Wedge inserts 23 into. respective receiving pockets
tion above the head and may be lowered when Work is
24 molded integrally into the shield. This coupling
resumed. To this end, the mechanisms usually include 20 arrangement forms the subject of our copending applica
a latching arrangement of detent character which estab
tion Serial No. 802,489, ?led March 27, 1959, now Patent
lishes such raised and lowered positions.
As constructed heretofore, these mechanisms have
No. 2,963,709, granted December 13, 1960, and entitled
“Quick Coupling for Molded Face-Protective Shield and
either worked too stiiily or too loosely for many welders.
Headgear.”
A consideration has been that it is often desirable for 25
While the illustrated headgear 16 is of open, band
a welder to be able to lower the shield from rest position
type, it could just as easily be a hard hat of the type
to work position by merely nodding his head, this being
Worn by industrial workers for head protection.
particularly true when his hands are required for holding
The pivotal mounting mechanism 22 includes move
‘both the work and the Welding torch. Yet, it is not de
ment-limiting
and position-adjusting structure 25.
30
sirable that the shield be subject to falling from rest
Each
wedge
anchor insert 23 has a projection 26v
position inadvertantly due to too loose latching or pivot
ing.
Moreover, the relative resistance to or case of
changing from one position to the other should be a
matter of choice for the individual welder.
extending inwardly therefrom, which projection, so far
as the present mechanism is concerned, could extend
directly from a shield 10. It constitutes pivotal means
non-rotatably secured to the shield. An opening 27
A principal object of this invention is to provide pivotal 35 within
each projection 26 has a multi-sided extension
mounting mechanism of the type concerned having an
inherently freer and easier movement than customary,
but being adjustable with respect thereto and with respect
28 which non-rotatably restrains a nut 29 therein. Nuts
29 are threaded on pivot screws 30 in both pivotal mount
ing mechanisms 21 and 22.
to detent release, so that resistance to release and move
Each projection 26 is provided with a shoulder 31,
ment of the shield may be set as desired by the in~ 40 having a concentric series of four mutually spaced recesses
dividual user.
Another object is to, at the same time, provide for
52, which serve to receive and accommodate protruding
portions of ball detent means about to be described.
limited positional adjustment of the shield with respect
In the form illustrated, such ball detent means coni
to the headgear.
45 prises four detent balls 33 held in a retaining cage struc~
A feature of‘ the invention in the achievement of the
ture which mates with a rectangular projection 34- ex
?rst object is a resiliently biased ball detent arrange
tending
from shoulder 31. This non-rotatably mounts
ment employing anti-friction ball bearings, as detent
such ball-retaining cage structure on projection 26.
members, and means for adjusting the strength of such
resilient bias.
A feature in the achievement of the second is the provi
sion of mutually adjustable, interlocking arms rigidly
The said retaining cage structure comprises a posi
tion-limiting and ball-holding disc 35, FIG. 4, having a
rectangular opening 36 which non-rotatably mates with
projection 34. Disc 35 abuts shoulder 31, and is pro
vided with a circular series of four ball-holding pockets
37 which register with and are accommodated by the
Further objects and features of the invention will ap 55 recesses 32, respectively, of shoulder 31. Disc 35 also
pear from the following detailed description of the
has a marginal indentation 38 which de?nes, at its ends,
presently preferred speci?c construction illustrated by
limit stops 39 and 40. The retaining cage structure also
way of example in the accompanying drawing.
comprises a ball-retainer plate 41, FIG. 4, fastened to
In the drawing:
disc 35, as by spot welding. It is shaped to match disc
secured to the headgear and to the detent arrangement,
respectively.
FIG. 1 represents a left side elevation of a welder’s 60 35, being provided with a similar rectangular opening
face-protective shield, or helmet, and headgear combina
tion incorporating the pivotal mounting mechanism of
the invention;
36' and marginal indentation 38' de?ning limit stops
39’ and 41?’. It is also provided with a similar concen
tric series of four openings 43, through and from which
FIG. 2, a top plan view of the combination shown in
the upper portions of balls 33 project as detents for
FIG. 1, with the top of the shield broken away to fully 65 rolling contact with the confronting face of a detent
latch member 44 having a similar series of four ball
reveal the pivotal mounting mechanism;
latching, keeper indentations 45 formed therein. Such
FIG. 3, a horizontal section taken on line 3—13 of
detent latch member is preferably of matching disc con
FIG. 1;
?guration, but is provided with an arm 46 extending
FIG. 4, an exploded perspective view of the pivotal
70 rigidly therefrom. This arm has a projection 47 serving
mounting mechanism per se; and
as an abutment member with respect to stops 39, 39’, and
‘FIG. 5, a perspective view showing the reverse side of
40, 40', for limiting the range of rotative movement of
one of the parts illustrated in FIG. 4.
the ball-retaining cage structure 35, 41.
acreage
.
A central opening 48 in detent latch member 44 piv- ’
otally centers the latter on an extension 49, FIG. 5, of
projection 26 of the particular wedge insert member 23
concerned, projections 26 being each provided with a
central opening 553 for pivotally receiving a cylindrically
tubular projection 51 of headgear 16.
This serves to
pivotally mount shield 10 on headgear 16, the projec
tion 51 serving as pivot means non-rotatably secured to
a
other of the openings 64, 65, and 66. This provides
three diilierent positional adjustments for the shield with
respect to the headgear for aligning window 13 with the
eyes of a particular user.
Pivot screw 3% and nut 29 of pivotal mounting mech
anism 22 provide for adjusting the ease with which shield
31% moves from latched raised position to latched lowered
position, and vice versa, by increasing or decreasing the
compression of spring 61, depending upon which direc
headgear 16.
tion
pivot screws 3%? are turned.
10
The spacing of the aforesaid limit stops 39, 39’ and 4t),
Whereas this invention is here illustrated and de
4%’ of disc '35 and its rigidly attached ball~retainer plate
41 and ‘the positioning thereof in relation to the central
openings 36 and 36' of such disc and plate determine 7
the upper rest and lower work positions of the shield
with respect to .the headgear. The spacing of the ball 15
holding pockets 3'7, ball-retainer openings 43, and ball
latching, keeper indentations 45 is arranged to register
with the spacing of such limit stops, so latching of the
scribed with respect to a specific embodiment thereof, it
should be realized that changes may be made without
departing, from the essential contributions to the art
made by the teachings hereof.
"We claim:
'
l. in a welding shield and headgear combination,
pivotal mounting mechanism comprising pivot means
shield with respect to the headgear will occur auto
non-rotatably secured to the headgear; pivot means non
stops.
means interposed between said pivot means and includ
ing a ball-retaining cage having a circular series of balls
matically at the limit positions established by such limit 20 rotatably secured to the shield; ball detent latching
As shield 10 is moved from one limit position to the
projecting from a face thereof as detents and a latch
other, as determined by disc stops 39‘ and 40, balls 33
plate having a corresponding series of keeper indenta
roll out of the latching, keeper indentations 45 and over
the confronting face 52, FIG. 4, of detent latch mem 25 tions in one face thereof, said latch plate being dis
posed with its said face in confronting contiguous rela
ber 4-4.
tionship with the said face of the ball-retaining cage; and
Arm member 53 is non-rotatably mounted on a head
resilient means normally urging the ball-retaining cage
gear shoulder 54 by rivets or pins 57, FIG. 4, which
and the latch plate of said detent latching means together,
extend through arm member 53 and into shoulder open
said
cage and said plate being normally non-rotatably
30
ings 58, and also by engagement of a rectangular projec
tion 59 of headgear shoulder 54 by a rectangular opening
secured one to the shield pivot means and one to the
44 away from arm member 53 and toward detent ball
retainer cage '35, 41, so that the detent balls 33 are
headgear pivot means, the ball-retaining cage and latch
plate ‘being provided, one with a marginal indentation
de?ning mutually spaced limit stops, and one with an
abutment member projecting into said marginal indenta
tion to limit relative rotative movement of said cage
structure and said latch plate by engagement with one
from one limit position to the other.
tions, the abutment member is in engagement with one
60 of arm member 53.
A spring 61 of warped annular formation is located
within its circular center opening 62 on headgear projec—
tion 51. Spring 61 resiliently urges detent latch member
or the other of said limit stops.
pressed into their latching or keeper indentations 45 in
2. The invention de?ned in claim 1, wherein the spac
the limit positions of the shield with respect to the head 40 ing of the keeper indentations and the spacing of the
gear and against the confronting face 52 of detent late
detent balls correspond to the spacing of the limit stops,
member 44 when rolling over such face while being moved
so that, when said balls are seated in said keeper indenta
A pin 63, FIG. 3, is provided in arm 46, the latter
or the other of said limit stops.
being so formed as to have its outer portion parallel and 45
References Cited in the ?le of this patent
in close proximity ‘to ?xed arm member ‘53 of the head
gear. Such arm member 53 is provided with three
UNITED STATES PATENTS
openings 64, 65, and 66, shown in phantom in FIG. 4,
2,283,120
Malcom _____________ _._ May 12, 1942
for receiving pin 63. Ann 46 may be resiliently dis O
5
2,461,604
Huntsman ____________ __ Feb. 15, 1949
placed outwardly from ?xed arm member 53, in order
2,889,606
Bowers _______________ __ June 9, 1959
that pin 63 may be selectively moved from one to an
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