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Патент USA US2121487

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June'zl, 193's.’
‘
A_ w_ MCHOL';
2,121,487
4 ATTACHMENT FOR AIR HAMMERS
Fqlled June 24,- 1955
10
INVENTOR
W,.NIL0I2 0 ls
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Q0“? Q.) m
ATTORNEY
Patented June 21', 1938
21,121,487
‘ UNITED STATES
PATENT OFFICE
2,121,487
_
ATTACHMENT‘ FOR AIR HAMMERs
Arthur W. Nichols, Roseville, Calif.
Application June 24, 1935, Serial No. 28,054
a i
7
Claims.
This invention relates generally to pneumatic
hammers used for the repair of motor vehicle
bodies and fenders and on all sheet metal work;
the invention being directed speci?cally and par
5 ticularly to a die supporting attachment for such
air hammers.
The principal object of my invention is to pro-‘
vide a die supporting attachment which will
permit the pneumatic hammer and its cooperat~
10 ing die to be employed on repair jobs such as
near its upper or outer end. This hammer is
operated in the conventional manner by air
supplied from a ?exible hose 4 connected to the
valve unit; the valve being controlled by. a ?nger 5
lever 51 under the handle. Thus far the con
struction is standard and I do not alter the same
in any way. Ordinarily however a U-shaped
arm is mounted in connection with the hammer
which supports the die to cooperate with the
automobile doors without removing the inside
hammer plunger, and this arm I remove in
metal structural panels as used in modern all
steel vehicle bodies.
applying my attachment.
Said attachment comprises a U~shaped arm
6 taking the place of the original arm, and
preferably of piping. One leg of this arm at 15
one end removably but non-turna‘bly fits in the
In the past, especially on door repair jobs,
where the door was provided with an inside metal
panel, it has been necessary to use a device
known as a separate “spoon” in place of the
usual relatively large die which of course would
not ?t between the metal door and inside panel.
20
(Cl. 153—32)
valve body unit 3 projecting laterally therefrom
With my die supporting attachment however
a pneumatic hammer may be successfully used
to repair doors constructed as above set out,
panel boards, control boards, and foot boards.
The attachment also permits the hammer and
25 die‘to extend around braces as well as door and
body supports thereby permitting use of the
hammer in places heretofore impossible with a
tool of this character.
As a further object, it is my purpose to pro
vide a cap for the pneumatic hammer which will
permit its use on painted, enameled, chrome or
nickel surfaces without injury to such surfaces.
A further object of the invention is to pro
duce a simple and inexpensive device and yet
one which will be exceedingly effective for the
purpose for which it is designed.
These objects I accomplish by means of such
structure and relative arrangement of parts as
will fully appear by a perusal of the following
4 O speci?cation and claims.
"
In the drawing similar characters of reference
indicate corresponding parts in the several views:
Figure 1 is a side elevation of my improved
pneumatic hammer attachment as working on
45 an automobile door.
Figure 2 is a fragmentary end view of the die
supporting yoke of the attachment;
'
Figure 3 is a fragmentary end view of the
hammer head showing a Celluloid cap thereon.
Referring now more particularly to- the char
acters of reference on the drawing, the numeral
i denotes the hammer head or casing of a
pneumatic hammer of a certain standard type,
having a vibratory or reciprocating hammer
plunger 2 therein. The head has a handle and
outer end of the handle unit the same as the
original arm, and extends in longitudinal aline
ment therewth. The other leg lies in transverse
alinement with the‘ hammer head some distance w.
under the hammer, at which end said leg is
squared, as shown at‘ l.
Removably mounted in connection with and
supported by the arm is a die supporting yoke‘
8. This is also of piping and of U-shaped form,
lying. in a common plane with the arm but rela
tively small, both as to its length or depth, and.
as to the width between the legs. The lower
leg of the yoke 8 is provided at its outer end
with a squared socket 9 extending lengthwise 30
thereof immediately below the same and adapted
to reversibly receive the squared end ‘i’ or the
arm 6 therein; said socket and end 1 being re
movably held together against undesired dis
placement by a transverse pin i0.
35
The other leg of the yoke 8 terminates'closely
below the hammer and is ?attened as at ‘H to
provide a ?at support for a die block l2 of rec
tangular form and convexly curved on its work
ing face as indicated. The die is rigidly secured
on the flat portion H by welding or otherwise
and is spaced from the adjacent end of the ham
0
mer head sufficiently to enable the sheet metal
sheathing of an automobile door 83 or body to
project therebetween.
45
In‘ operation the yoke is detached from the
arm and is manipulated so that the leg with
the die [2 thereon passes through that one of
the usual openings formed in the inner panel [4
of the door which is closest to the place on the
outer panel to be treated. It is of course under
stood that the socket leg of said yoke remains
outside the panel. The arm 6 is then placed in
straddling relation to the door and the squared
end i is slid into the socket 9 from either end of 55
2
2,121,487
the same, depending on the conditions or the
size of the particular part being worked on, and
is held in place by the pin ID. The arm and
yoke, the free end of the other leg of the arm
being correspondingly formed to removably en
gage the socket.
3. A die supporting attachment for a pneu
hammer are then shifted as a unit with the yoke,
as may be necessary to locate the hammer in
matic hammer having a movable head, said
proper position for operation, and although the
attachment comprising a rigid U-shaped arm
cooperating die cannot then be seen, it also will
perforce be alined with the hammer on account
to straddle a part to be hammered in clearance
of its connection therewith through the yoke and
on one leg of the arm so that the hammer head
lies in a plane intermediate the arm legs, a die 10
10 arm.
relation thereto, means to support the hammer
If a ?ne or delicate ?nish is being worked on
positioned in alinement with and under the head
by the hammer, marring or damaging of said
?nish may be prevented by placing a Celluloid
to cooperate therewith, and a rigid die supporting
element extending ?rst substantially parallel to
cap l5 over the lower end of the hammer head,
as shown in Figure 3. The head is oval and
the cap is .of course correspondingly shaped. On
said one leg of the arm to a point short of the
U-bend of said arm and then de?ecting to and 15
being secured on the other leg of the arm.
4. A die supporting attachment for a pneu
the long sides of the head the corresponding
sides of the cap slope down to a relatively shal
matic hammer, comprising a rigid, substantially
low depth at the middle as indicated at H5 in
20 order that the cap itself may ?ex or yield with
U-shaped arm to straddle a part to be ham
mered, in clearance relation thereto, means to
the outward movement of the plunger 2 and yet
remain ?rmly in place on the head or casing I.
While celluloid is designated as being the cap
material, it is to be understood that any other
material suitable for the purpose may be used.
From the foregoing description it will be
readily seen that I have produced such a device
‘as substantially ful?lls the objects of the inven
tion as ‘set forth herein.
30
While this speci?cation sets forth in detail the
present and preferred construction of the de
vice, still in practice such deviations from such
detail may be resorted to as do not form a de
parture from the spirit of the invention, as de
35 ?ned by the appended claims.
Having thus described my invention, what I
claim as new and useful and desire to secure by
Letters Patent is:
1. In combination with a pneumatic hammer
having a casing and a reciprocatory plunger
therein exposed to the lower end of the casing, a
U-shaped arm the legs of which extend laterally
of the hammer, means to support the free end of
one leg from the casing, the other leg lying in
a plane below the hammer and its free end
support the hammer on one leg of the arm so
that the hammer head lies in a plane interme
diate the arm legs, a die positioned in alinement
with and under the head to cooperate there
with, and a rigid die supporting element extend
ing a certain distance from the die in a plane
at substantially right angles to the axial plane
of the hammer, and then de?ecting to and being
secured to the other leg of the arm.
5. A die supporting attachment for a pneu 30
matic hammer having a casing, a plunger recip
rocable in the casing, and a hammer head on the
outer end of the plunger, said attachment com
prising a die disposed beneath and separated
from the hammer head whereby work to be ham 35
mered may engage between the hammer head
and die, a rigid self-supporting yoke disposed
under the die, said yoke being disposed in the
leg of the yoke to cooperate with the hammer
same plane as the axis of the plunger, one leg
of the yoke being secured to the die, a rigid 40
substantially U-shaped arm between the legs of
which the yoke is disposed, means to connect the
other leg of the yoke and one leg of the arm
together at adjacent ends, and means to connect
the other leg of the arm to the hammer casing.
6. A die supporting attachment for a pneu
matic hammer having a casing, a plunger recip
rocable in the casing, and a hammer head on
the outer end of the plunger, said attachment
comprising a die disposed beneath and separated 50
from the hammer head whereby work to be ham
mered may engage between the hammer head
and die, a die supporting member which includes
a rigid leg secured to and projecting laterally
plunger, and an open ended socket ?xed on and
from the die and an element rigid with the _
portion being non-circular and disposed sym
metrical to the axis of the hammer plunger, a
U-shaped yoke of smaller dimensions than the
arm and whose legs also extend laterally of the
50 hammer, one leg of the yoke extending from
under the hammer adjacent the same and the
other leg lying in a plane above the other leg
of the arm, a die on the free end of said one
extending lengthwise of the other leg of the - outer end of said leg and extending to a termi
yoke at its free end and under the same for
nation in a plane below and spaced from the
slidable and reversible but non-turning engage
die, and a rigid, substantially U-shaped arm hav
ment with said non-circular end portion of the ing legs to extend laterally relative to the axis
other leg of the arm.
of the hammer plunger, one leg at its free end
2. In combination with a pneumatic hammer
being adapted for connection to the hammer
having a casing and a reciprocatory plunger casing, and the other leg extending to a point
therein exposed to the lower end of the casing, a adjacent said termination of the die supporting
U-shaped arm the legs of which extend laterally member, and means to connect said other leg
at its free end to said termination whereby to 65
65 of the hammer, means to support the free end of
one leg from the casing, the other leg lying in support said member.
a plane below the hammer, a U-shaped yoke
'7. A structure as in claim 5 in which said
legs also extend laterally of the hammer, one
leg of the yoke extending from under the ham
yoke and arm connecting means are arranged
so that the yoke may extend in opposite direc
tions selectively relative to the plane of the
mer adjacent the same, a die on the free end
hammer.
of smaller dimensions than the arm and whose
of said leg to cooperate with the plunger, and
a socket on the free end of the other leg of the
‘
ARTHUR W. NICHOLS.
70
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