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Патент USA US2106160

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Jan. 25, _1938.
Jà D. BAKER
PUNCHING 'MECHANISM
v2,106,160
- Filed NOV. 22, 1935
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2,106,160>
Patented Jan. 25, 1938
TENT O FF I'î
UNÃTED STATES
i 2,106,160
PUNCHING MEcHA'NIs'M
`lob D. Baker,_ Gilbertville, Mass'.,-as'signor to Su'l
livan Machinery Company, a corporationgof
Massachusetts
Application November 22, 1933, Serial'No\69‘9',21128 Claims.
This invention relates to punching mecha
nisms, and more particularly to punching mech
anisms of the pressure fluid actuated percussive
type for opening o-r pinning outthe h'oles in hol
' ‘ low vrock drill steel during'the forging operation.
improved punching mechanism; Another object
guide IAÍOrmS-anlabutment or rear stop for' lim
an improved valve controlr mechanism for the
hammer motor of such a punching mechanism.
These and other objects will, however,«herein
after more fully appear.
In the accompanying'drawing therefis shown,
for purposes of illustration, one form».which the
invention may assume in practice.
In this drawing.-
.
Fig. 1 is a longitudinal vertical sectionalv view
(D fr) through the illustrative form of :the improved
punching mechanism, the hammering mecha
nism thereof shown in pinning-in position.
Fig. 2 is a view similar to Fig. l, showng the
hammering mechanism in pinning-out position.
'so
arms I5A straddling the motor cylinder and .sup
porting-«a releasable pin I‘I.for.h<'ilding` theham
mer mechanismwithin itsguideson the support
` proved manner. Yet another object 1s to provide
_
shown, the `supporting .frame »has upstanding
An object of this invention isito provide an
is to provide an improved punching mechanism
of the pressure ñuid actuated'percussive type for
l0. opening the holesl infhollow rock drill steels dur
ing-the forging operation. A further object is to
provide an improved punching mechanism
wherein the pinning.' out tool is'hammered- into
ö and released from the rock drill steels-inanim
eo
frame -3,` the-forward end ofthe motor cylinder
being guided atv I5 o-n the supportingframe, As
Fig.' 3 is a» view'similar to Figs. l and 2; showing
the hammering mechanism in'its inoperative»l or
shut-down position.
In this illustrative embodiment of the inven
„_ tion, there is shown ’a punching mechanism'gen
"D erally'designatedA I,> generally comprising aiiuid
actuated vhammering mechanismÁ 2 #supported on
a suitable supporting frame ‘3i
The hammering mechanism'î,
M drawing, comprises a pressure
hammer motorhaving a motor
taining a reciprocable hammer
as shownßin` the
ñuid actuated
cylinderlI'con
piston 5. This
hammer piston is provided with a^forwardly pro
jecting striking bar 6 for transmitting hammer
4,) blows to the shank ‘I of a usual collared pinning
' out tool or punch pin 8. This pin .shank is sup
portedvwithin a chuck 9 carried within` the front
part of the motor cylinder. Thexpunch pin col
lar is indicated at ID. Secured to the rear end of
„n the motor cylinder is a rear head member I I', a
valve chest member I2 and a rear head block I3,
these parts being held in assembled relation with
respect'to the cylinder in any suitable manner.
The rear head block is cylindrical in form and is
3.) guided for reciprocatory movement in a concave
" recess or 'guideway Id'formed `on the supporting
ing frame.
The rearendwall'Iß> of therear
iting rearward movement of the hammercon
trol mechanism,4 while a yoke-.shaped abutment
I9 »forms a. front4 stop for, limiting forward move
ment of. thet hammer control -mechanism, the
punchfpin `of the hammer-¿mechanism projecting
forwardly through-a vertical sloty 2-9 formed in
this yoke. The ’yoke-f I9 -alsoforms a retainer for
precluding -forward release of the punchpin from
its'chuck.
‘Theha-mmer motor is Lpreferably of la standard
type;- and thev valvev mechanism thereof tforI dis
tributing pressure fluidïïto theemotor- cylinder to
effect rapid‘reciprocation of the hammer piston
comprises~ a "usual y automatic ~- fluid distributing
valver2l "g‘u-ided‘f‘for reciprocatory ymovement in
a'bore 22» formed‘in the valve chest member yI2
andf-controllingthe supply of motive fluid ñow
ing through~afpassage~23~to the motor cylinder
25
andV the exhaust `fof» iluid- from the lmotor cylinder
through aiusual- exhaust passage »24. Attached
to-‘therearfhead- block I3 is-arluid supplypipe
25v` projecting »downwardly Ythrough --a >slot 26 30
formed r‘in’ the `guide- portion ofthe `supporting
frame, and this'lpipe‘ engageable with the slot
ends limits movement 'of the hammering mecha
nism in its gu'ides. A passage 21 connects this
supply lpipe with >a ‘longitudinally extendin g_Y axial 35
valve’ bore`28 formed in the head block I3. Re
ciprocable in this/bore »28- is athrottle valve 29
having a groove 30 for'connecting the supply’pas
sage Z‘I'with the supply passage 23. A-.passage
3| connects the supply passage-21 with the bore y 40
28A at'f'the `forwardside- of the throttle valve `29
so that the throttle valve‘ is constantly urged vto
ward lits rearmost closed position.
'I'he improved means >for controlling the throttle
valve 29 for'holding the latter open :during for- ` 45
Ward movement> of 'the~ hammer mechanism 'so
that operation 'of the hammer piston is'eiïected
during withdrawal or retractive movement of the
drill steel, hereinv ‘comprises a valve control mem 50
ber, herein inthe form of ak yoke-shaped member y
33 guided between the arms I6 and having a'
longitudinal portion 34 overlying the hammer
moto-r and downwardly bent front and rear ends
>35 and 36. The‘rear end 36 of this'V yoke member
extends downwardly-between the rear‘end of the 55
2
2,106,160
head block I 3 and the rear abutment I8, and has a
circular recess 3l for receiving the rear end of the
throttle valve 29, while the forward end 35 of
the yoke member is provided with an opening 38
through which the punch pin loosely projects and
arranged between the front end of the motor and
the front abutment I9.
'I‘he operation of the improved punch mecha
nism will be clearly apparent from the descrip
10 tion given.
During the forging of the cutting end
of the drill steel S, the central hole therein is
wholly or partially closed, and to open up or
pin out this hole the drill steel S is placed in the
position shown in Fig. 1 against the forward end
of the punch pin 8. The drill steel is then moved
inwardly toward the hammer mechanism, there
by shoving the punch pin rearwardly, and as a
result, the hammer mechanism is moved bodily
rearwardly in its guides relative to the support
20 ing frame, to the position shown in Fig. 1. At
this time the rear end 36 of the yoke member 33
is held against the rear abutment I8 with the
throttle valve 29 held in abutting relation with
the bottom of the recess 3'I by the action of the
pressure fluid acting on the forward area of the
valve, and as the hammer motor was moved rear
wardly in its guides the passages 21 and 23 were
moved into a position wherein the groove 30 in
the throttle valve connects the same, and as a
30 result pressure ñuid is admitted to the motor cyl
inder to effect reciprocation of the hammer pis
ton. Upon further rearward movement of the
drill steel, the punch pin is driven into the drill
steel bore.
holes in rock drill steels and for releasing a stuck
pin from the steel bore, the retractive hammering
action effectively freeing a stuck pin from the
steel bore. Moreover, it will be noted that the
improved punch mechanism is of an extremely 5
simple and rugged construction which may be
manufactured and kept in repair at a minimum
of expense.
These and other uses and advantages
of the improved punch mechanism will be clearly
apparent to- those skilled in the art.
10
While I have in this application specifically de
scribed one form which the invention may as
sume in practice, it will be understood that this
form is shown for purposes of illustration and
that the invention may be modiñed and embodied 15
in various other forms without departing from
its spirit or the scope of the appended claims.
What I claim as new and desire to secure by
Letters Patent is:
1. In a punching mechanism, a ñuid actuated 20
hammer motor, a Valve for controlling the sup
ply of motive fluid to said motor, a pinning out
tool actuated by said motor, and means actu
ated by movement of the pinning out tool rela
tive to the motor and operatively connected to 25
said valve independently of said motor for con
trolling said valve.
2. In a punching mechanism, a supporting
frame, a hammer motor guided for longitudinal
movement forwardly and rearwardly along said 80
frame, a punch pin percussively actuated by said
hammer motor and to which pressure is adapted
to1be applied by engagement of the work there
with for controlling movement of said hammer
When the drill steel S is pulled rear
wardly to withdraw the steel from the punch
mechanism and the punch pin is stuck within the
motor forwardly and rearwardly along said
steel bore, the punch pin is pulled outwardly rela
tive to the motor cylinder, thereby bringing the
with said punch pin for controlling actuation of
collar I9 thereon into engagement with the front
end 35 of the yoke member 33, thereby moving
the hammermechanism into the position- shown
in Fig. 2, with the throttle valve 29 held in its
open position by the yoke member, and as a re
sult, as the hammer mechanism is moved for
45 wardly the punch pin 8 is loosened or freed from
the drill steel bore. It will thus be seen that the
operation of the hammer is continued during re-traction of the drill steel, and the hammering
action thereof on the pin 8 effects release of the
50 latter from the steel bore. When the punch pin
is freed from the steel, the yoke member 33 is
free to move rearwardly to release the throttle
valve, and the pressure fluid acting on the for
ward nd of the throttle valve quickly moves the
55 latter» nto its rearrnost closed position, as shown
in Fig. 3; and as a result, action of the hammer
motor stops. The forward pin freeing movement
of the hammer mechanism is a rapid operation,
and quick pin release is frequently effected by
but a single ham-,mer blow on the punch pin
shank, the hammer mechanism jumping back
upon engagement with the front abutment I s
with a sort of repercussion and the hammer
thereof immediately stopping before the hammer
65 can strike the front end of the valve control yoke
33 when the latter has moved away from the
front abutment I9. It will thus be seen that the
control Valve 29 is maintained open by engage
ment with the rear abutment I8 during the ham
70 mering-in operation and by the yoke 33, which is
distinct from the rear abutment I8, during the
hammering-out operation.
Under actual operating conditions, the im
proved punch mechanism has been found to be
frame, and means embodying means associated
said hammer motor, movement of said hammer
motor into its rearward position by application
of a rearward pressure by the work on the punch
pin causing said control means to effect motor
actuation to drive percussively the punch pin into
the work, and movement of said hammer motor
into its forward position by application of, a for
ward pressure by the work on the punch pin
causing said control means to- effect motor actu
ation to release percussively the punch pin from
the work.
'
p
3. 'In a punching mechanism, a frame having
guiding means, a hammering mechanism 'guided
for back and forth movement in said guiding
means, a punch pin percussively actuated by said
hammer mechanism and against which pressure
is adapted to be applied by engagement of the
work therewith for controlling movement of said 55
hammering mechanism back and forth in said
guiding means, and means for causing said ham
mering mechanism to operate to effect ham
mering of the punch pin when said hammer
mechanism is in either its rearward or forward 60
position relative to said frame guiding means.
4. In a punching mechanism, a ñuid actuated
hammer motor, a valve for controlling the supply
of motive fluid to said motor, a pinning out tool
actuated by said motor, and means actuated by 65
movement of the pinning out tool relative to the
motor for controlling said valve and including
a yoke-shaped member extending along one side
of the hammer motor and engageable with the
pinning out tool and said controlling valve.
70
5. In a punching mechanism, a fluid actuated
hammer motor, a valve carried within the rear
end of the hammer motor for controlling the
supply of motive fluid to said motor, a pinning
75 highly effective in opening orfpinning out the » out tool carried within the forward end of the 75
21,1962?! BÖ
hammer motor and actuated therebyïand’ïm'ean's
actuated by' movement of‘the jpinningfoutìtoòl
relative to the hammer motorfor controlling-*said
valve and including'a'member exten‘ding'fa'long
one side of the'hammer'motor and ‘engageable‘at
its rear end 'with'said valve“andfatf'its'forward
end with said pinning out- tool;
6. In a punching‘mech'anism, a fluid‘actu'ated
hammer motor, a Valve carried within-‘the'rear
10 end ofthe hammer motor for controllingU the
supply of motive fluid to ‘said motorya _pinning
out tool carried within the "forwardiend of the
hammer motor and actuatedv thereby; and mea-ns
15
said hammer mechanismìto actuate percussively
sa-idfïpinning~out1too1-k to release the latter from
the Work.'r
1‘0‘?Ini‘an‘ipun'ch-mechanism, a support having
a’- longitudinally v extending Y’ guideway, a'hammer
U1.
mechanism -slidably- guided i in said guideway, a
pinning outlïtool actuated by said hammer mech
anism¢a valve-openedby rearward longitudinal
movement *of -ï said hammer- mechanism in said
guidewayëfor effecting actuation of said hammer 10
mechanism to vactuate percussively said pinningv
out -tool to- vdrive`-` the latter into the work,- and
means" forA maintaining said valve yopen during
forward longitud-inalmovement of said- hammer
actuated by movement v'of the?pinning'but'tool
relative to the hammerimotorfor controlling
said valve and including aïmember exter'fdi'vn'gl
mechanism to actuate percussively said pinning 15
outitool'tofrelease th'eïlatter from the workysaid
along one side of the’hammer motor‘and‘engage'
able at its rear end with"’sai‘d"va1veand“ at"` its
nected to said-»valve and said pinning out tool.`
latter-'means including'- means operatively con
11. In a=punch-V4 mechanism, a supporthaving
a-longitïudinally extending guideway, a hammer
mechanism'v slidablyl» guided in said `guideway,v a
pinning out toolßactuated by said hammer mech
forward end with saidpinning 'out tool, the"for
20 ward end of said member having 'an-"opening
through which said pinning out`tool"projects.l
'7. In a punching mechanismya ksupporting
frame having front and rear-abutments andguid
anism,1a'~valve opened'ïby rearward llongitudinal
ing means arranged between saidiab'utm'ents, a
movement ofsaidfhammer mechanism in said
25 hammer motor. guided'for endwiseïeciprocatory
guidewayîfor effecting-actuation of said hammer 25
movement in said guiding means relativeto'said mechanismto actua-teïfpercussively said pinning
frame and between said abutments,‘-~a"valve‘car-A out‘tool‘to drive'the latterinto the work, and
ried Within the rear end of the hammer motor
30
forcent-rolling the actuation‘thereof, a-pinning
out tool supported within the'forward‘en‘d of the
hammer motor for actuation therebyfsaidfpin’
ning out tool havingl a collar thereon, and“ means
for controlling said valve ‘by ‘movement of the
pinning out tool ~relative'to the >hammer motor
35 including a yoke-shaped member extending along
one side of the hammer motor and‘havinga
front end portion extending between lthe` pin
collar and the front abutment'and a‘rear portion
extending between the 'rear abutment andthe
40 valve.
'8. In a punching mechanism, a -‘supporting
frame having front 'andrear abutments 'and‘guid
ing means arranged between said ’abutments,‘"a
hammer motor guided for endwise reciprócatory
45 movement in said guiding means relative'to-sai‘d
frame and between said abutments,y avalve‘car
ried within the rear end vofthe lhammer motor
for controlling. the actuation thereof; a pinning
out tool supported within the forward- end ‘of -the
50 hammer motor for actuation'thereby;‘ saidpin‘
ning out tool having a `collar thereon,'means‘f.or
controlling said valve‘by movementiof the’pîn
ning out tool relative to the ‘hammer motor "in
cluding a yoke-shaped member extending 'along
55 one side of the hammer motor. and havingia` front
end portion extending between'the‘pin collar 'and
the front abutment and a rear portion extending
between the rear abutment and the‘valve; said
Leinher maintaining said valve in open position
60
during forward movement of thehammer motor
in its guides, and means for effecting automatic
closing of the valve when the’punch'pinis re
leased.
9. In a punch mechanism, a support having >a
longitudinally extending -guideway, a hammer
mechanism slidably guided 'in said guide'way; a
pinning out tool actuated by said hammer‘mecha-nism, a valve opened by rearwardlongitudinal
movement of said hammer mechanism' in said
70 guideway for effecting actuation' of 'said'hammer
mechanism to actuate percussively `said‘pinning
out tool to drive the latter into the work, >and
means for maintaining said valve ’open during
forward longitudinal movement of said hammer
75 mechanism in its guideway'to’effect' >actuation of
means'for maintaining' said -valve open during
forward @longitudinal movement of said hammer
mechanism in its guideway to eiîect actuation of 30
said'hammer mechanism to actuate percussively
said `pinning~out rtool to release‘the latter from the
work,y said means comprising an; element extend
in‘gv between said pinninglout tool and said valve
and engaging the- latter for maintaining said 35
valve open during said forward longitudinal
movement.
v'12.‘11'1 -a'f-punch-V mechanism, the combination
of 4a cylinder `having apiston chamber and a ham
mer 'pistonin saidlpiston'rchamber, a working
implement having-a shank provided with a rear
impact surface rand ïadaptedfto ' be actuated per
cussively’byfsaid hammer piston, means for ef
fecting Va'ctiïiation of 'said hammer piston'to drive,
bythe direct hammering -action of the hammer
piston» on l»the rear impact surface on the rear
end of thefworking-'member shank, said working
implement intothe work, and means associated
withy an‘dfactuated by movement of said working
implement with respect to -said cylinder to eiiîeciactuation'of saidhammer-piston to release, by
the l‘direct l'hammering'faction' of the hammer pis
ton on the rear impact surface on the rear end of
the working implement shank, said working im
plement from the work.
`
13-.Y`In ~a punch mechanism, a support having
a'guideway‘a'hammer mechanism guided on said
guideway‘ and'com‘prisin‘ga cylinder having a pis
ton -chamberïand a‘pist'on reciprocable in said
chamber,v a punch pin actuated by said hammer
mechanism, a- valve mechanism operatedl by
movement of said hammer mechanism in a rear
ward‘direction"along’its guide'way to effect actu
ation ofthe hammerpiston to` drive the punch
pin into‘the work, and means associated with and 165
actuated‘by said punch pin for holdingsaid valve
mechanism open during‘ forward movement of
the hammer -mechanism along its guideway to
cause-said hammer mechanism to effect release
of the punch pin from the work.
14. `In a'punch mechanism, asupport‘ having
a guideway, a hammer mechanism ~guided on said
guideway'andfcomprising'aïcylinder having a pis
tonch'amberl and a piston reciprocable 'in said
chamber, aipunchepin actuated‘by saidhammer
4
2,106,160.
mechanism, a valve mechanism operated by
movement of said hammer mechanism in a rear
ward direction along its guideway to effect actu
ation of the hammer piston to drive the punch pin
into the work, and means associated with and ac
tuated by said punch pin for holding said valve
mechanism open during forward movement of the
working mechanism along its guideway to cause
said hammer mechanism to effect release of the
10 punch pin from the work, said latter means in
cluding a member engageable with the punch pin
and operatively connected to the valve mecha
nism for holding the latter open during such for
ward movement of said hammer mechanism
15 along its guideway.
15. In a punch mechanism, a support having
a guideway and end abutments, the forward
abutment having an opening, a hammer mech
anism slidably -guided on said guideway between
20. said abutments, a collared punch pin actuated by
said hammer mechanism and projecting through
the opening in the forward abutment, a valve
mechanism operated by movement of said ham
mer mechanism in a rearward direction along
25 said guideway to effect actuation of the hammer
mechanism to drive the punch pin into the work,
and means, including a member having an open
ing through which the punch pin projects and
engageable by the pin collar and extending into
30 a position with a portion thereof interposed be
tween the rear abutment and said valve mecha
hammer motor in its guides, and means for ef
fecting automatic closing of the valve when the
punch pin is released.
18. In a punch mechanism, a support having a
guideway, a pressure fluid actuated hammer mo
tor slidably guided on said guideway, a punch pin
having a shank supported in position to receive
the impact blows of said hammer motor, a valve
opened by rearward movement of said hammer
motor in its guideway to effect actuation of the 10
hammer motor to actuate percussively the punch
pin to drive the punch pin into the work, and
means for maintaining said valve open during
forward movement of the said hammer motor in
its guideway to effect actuation of the hammer 15
motor to actuate percussively said punch pin
shank to loosen the punch pin in the work during
such forward movement, said hammer motor
having a hammer element for delivering impact
blows directly to the punch pin shank during 20
both rearward and forward movements of said
hammerA motor along its guideway.
19. In a punch mechanism, a support having
a guideway, a pressure fluid actuated hammer
motor slidably guided on said guideway, a punch 25
pin having a shank Supported in position to re
ceive the impact blows of said hammer motor, a
valve opened by rearward movement of said ham
mer motor in its guideway to effect actuation of
the hammer motor to actuate percussively the 30
punch pin to drive the punch pin into the work,
nism, for operating said valve mechanism during
and means for maintaining said valve open dur
forward movement of the hammer mechanism' ing forward- movement of the said hammer mo
tor in its guideway to effect actuation of the ham
along its guideway to cause said hammer mech
anism to effect release of the punch pin from the mer motor to actuate percussively said punch pin 35
shank to loosen the punch pin in the work dur
work.
16. In a punching mechanism, a supporting ing such forward movement, said hammer mo
frame having front and rear abutments and tor having a hammer element for delivering im
guiding means arranged between said abutments, pactblows directly to the punch pin shank dur
a hammer motor guided for endwise reciproca-V ing both rearward and forward movements of
tory movement in said guiding means relative to said hammer motor along its guideway, said ham
said frame and between said abutments, a valve mer motor and said latter means moving auto
matically into inoperative position to close said
carried- within the rear end of the -hammer mo
valve to shut down the punch mechanism when
tor for controlling the actuation thereof, a pin
ning out tool supported within the forward end the punch pin is released from the work.
of the hammer motor for actuation thereby, said
20. In a punch mechanism, a hammer motor
pinning out tool having a collar thereon, and having an impact element, a punch pin actuated
means for controlling said. valve by movement thereby and having a shank provided with a rear
of the pinning out tool relative to the hammer impactV surfacel adapted to receive the impact
blows of said impact element, and means con 50
50 motor including a valve controlling member ex
tending along one side of the hammer motor and trolled by engagement of the work with the punch
having a front end portion extending between pin for effecting actuation of the hammer motor
the pin collar and the front abutment and a rear to actuate, by a direct hammering action of said
portion extending between the rear abutmentl impact element on said rear impact surface on
thepunch pin shank, the punch pin to drive the 55
>
55 and the valve.
1'7. In a punching mechanism, a supporting' latter into the work and to effect release thereof
frame having front and rear abutments and from'the Work.
guiding means arranged between said abutments,
21. In a punching mechanism, a fluid actuated
a hammer motor guided for endwise reciprocatory hammer motor, a Valve for controlling the sup
60 movement in said guiding means relative to said ply of motive fluid to said hammer motor, a pin 60
frame and between Said abutmentsa valve car
ning out tool actuated by said motor, and means
ried within the rear end of the hammer- motor actuated by engagement of the work with said
for controlling the actuation thereof, a pinning pinning out tool for controlling said valve to ef
out tool supported within the forward end of the fectmotor actuation thereby to actuate by a
hammering action the pinning out tool to drive 65
65 hammer motor for actuation thereby, said pin
ning out tool having a collar thereon, means for the latter into the Work and to effect release of
controlling said valve by movement of the pin
the _tool from the work and including valve oper
ning out tool relative to the hammer motor in
ating means operatively connected to the valve
cluding a valve controlling member extending independently of the motor, said controlling
70 along one side of the hammer motor and having` means embodying means for maintaining said 70
a front end portion extending between the pin valve in operative position by engagement of the
collar and the front abutment and a rear portion pinning out tool with said last mentioned means
extending between the rear abutment and the during the release of the pinning tool from the
valve, said member maintaining said valve in work.
75 open position ¿during forward -movement
the`
AIn a punch mechanism, the combination of 75
S
2,106,160
a pressure fluid actuated hammer motor having
a cylinder and a hammer piston in said cylinder,
a supporting frame for said hammer motor, a
working implement adapted to be percussively
Ul actuated by said hammer piston, means for con
trolling the supply of pressure fluid to said ham
mer motor, means for operating sai-d control
25. In a punching mechanism, a fluid actuated
hammer motor, a valve for controlling the sup
ply of motive fluid to said motor, a pinning out
tool actuated by said motor, and means actuated
by movement of said pinning out too-l relative to
said motor and including an operating connec
tion connected to said pinning out tool and valve
means to effect actuation of said hammer motor , and movable relative to said motor for controlling
said valve to effect actuation of said motor to
to cause said hammer piston to actuate percus
sively said working implement in a forward di
rection for driving the working implement into
the work, and means associated with and actu
ated by movement of said working implement
with respect to said cylinder for~ operating said
control means to effect actuation of said hammer
motor to cause said hammer piston to actuate
percussively said working implement in a forward
direction for releasing said working implement
from the work, said control means assuming dif
ferent positions with respect to said motor sup
port during the driving in and releasing opera
tions of said hammer motor.
23. In a punching mechanism, a support hav
ing a guideway, a hammer motor mounted for
back and forth movements on said guideway, a
punch pin actuated by said hammer motor and
to which pressure is adapted to be applied by
the work for controlling movement of said ham
mer motor into its rearward and forward posi
30 tions on said guideway, and control means for
said motor operative when said motor is in its
rearward position to effect actuation thereof to
drive the punch pin into the work and embody
ing means operative when said motor is in its
forward position to effect actuation of said mo
tor to release the punch pin from` the work,
24. In a punching mechanism, a hammer mo
tor, control means for said motor, a punch pin
actuated by said hammer motor and to which
pressure is adapted to be applied by the work for
operating said control means to effect motor actu
ation, said punch pin having a shank provided
with a rear impact surface on its rear end, pres
sure being applied in a rearward direction by the
work to the punch pin to operate said control
means to effect motor actuation to drive, by the
direct impact of the hammer motor on the rear
impact surface on the rear end of the punch pin
shank, the punch pin into the work, said con
50 trolling means embodying means operated by
pressure applied to the punch pin by the work
in a forward direction to operate said control
means to effect motor actuation to release, by
the direct impact of the hammer motor on the
55 rear impact surface on the r'ear end of the punch
pin shank, the punch pin from the work, ele
ments of said control means assuming different
bodily located positions during the driving in
and releasing operations.
release the pinning out tool from the work.
10>
26. In a punching mechanism, a fluid actuated
hammer motor mounted for bodily movement
forwardly and rearwardly, a valve for control
ling the supply of motive fluid to said motor, a
pinning out tool actuated by said motor, means 15
for controlling said valve when said hammer mo
tor is in its rearward position to effect actuation
of said pinning out tool, and means embodying
means distinct from said controlling means for
controlling said valve to effect actuation of said 20
pinning out tool when said motor is in its forward
position, said valve and certain elements of its
controlling means moving bodily with said ham
mer motor during movement of the latter from
its rearward position to its forward position.
25
27. In a punch mechanism, a hammer motor
having an impact element, a punch pin actuated
thereby and having a shank provided with a
rear impact surface on its rear end adapted to
receive the impact blows of said impact element, 30
and means controlled by movement of said punch
pin selectively in opposite directions by engage
ment of the work therewith for effecting actua
tion of said hammer motor during both direc
tions of movement of said punch pin to actuate, 35
by a direct hammering action of said impact ele
ment on said rear impact surface on the rear
end of the punch pin shank» the punch pin to
drive the latter into the work and to effect re
40
lease thereof from the work.
28. In a punch mechanism, a hammer motor
having an impact element, a punch pin actuated
thereby and having a shank provided with a rear
impact surface on its rear end adapted to re
ceive the impact blows of said impact element, 45
means controlled by movement of said punch pin
by engagement of the work with said punch pin
for effecting actuation of said hammer motor to
drive, with a direct hammering action of said
impact element on said rear impact surface on 50
the rear end of the punch pin shank, the punch
pin into the work, and cooperating means con
trolled by movement of the punch pin in the
opposite direction by engagement of the work
therewith to release, by a direct hammering ac 55
tion of said impact element on said impact sur
face on the rear end of the punch pin shank,
the punch pin from the work.
JOB D. BAKER.
Patent No.. 2,106,160.
CERTIFICATE OF CORRECTION.
-
January 25, 1,938.
JOB D. BAKER,
’
It is hereby certified that error appears in the printed specification
of the above numbered patent requiring correction as follows: Page 5 , second
column, line LL, claim lO, for "an" read a; page 5, second> column, line 56,
claim 28, after the word "said" second occurrence , insert rear; and that
the said Letters Patent should be read'with these corrections therein that
the same may conform to the record of the case in the Patent Office ,
Signed and sealed this lst day lof March, A, l D, 19%8 ..
Henry Van Arsdale,
(Seal)
_
Acting Commissioner of Patents.,
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