close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3071365

код для вставки
Jan. l, 1963
`
J, HERRMANN
3,071,355
APPARATUS FOR THE PRODUCTION OF COAL BY SHAVING TECHNIQUES
Filed May 5, 1959
5 Sheets-Sheet l
Wam) d“
Jan. 1, 1963
3,071,355
J. HERRMANN
APPARATUS FOR THE PRODUCTION OF' COAL BY_ SHAVING TECHN
Filed May 5, 1959
IQUES
5 Sheets-Sheet 2
9
1
_
'
/NvENroRk
Iuuus HEMA/Mw
W
,wrom/sys
Jan. 1, 1963
`1.|-|L=_RRMANN
3,071,355
APPARATUS FOR THE PRODUCTION OF OOAL BY sHAvING TECHNIQUES
Filed May 5, 1959
3 Sheets-Sheet 3
IN VEN T0R,”
ATVOK/VÈVS
IC@
3,6?1'355
Patented Jan. l, 1963
2
placed a certain degree with respect to the shaving ele~
ment body. This may be accomplished by spring means
3,071,355
APPARATUS FOR THE PRÜDUCTIÜN 0F CÜAL
‘
which permit a predetermined degree of displacement
EY SHAVÃNG TECHNIQUES
of the plane edge members in response to excessive re
.luilus Herrmann, Altlunen, Germany, assignor to Ge
werkscha‘r't Eisenhütte Westfalia, Wetlnnar, near Lunen,
Germany, a corporation of Germany
_
sistance forces presented by the coal face. Consequently,
where the pulsating drive force impels the shaving ele
ment forward against an excessively resistant mine face,
instead of this excessive resistance force being undesirably
transmitted through the plane edge members -to the shav
Filed May 5, 1959, Ser. No. 811,2@3
Claims priority, application Germany May 7, 1958
15 Claims. (Cl. 262-ö)
l0
The present invention relates to the production of
coal, and more particularly to a process and apparatus
for convenient and effective shaving of coal from mineral
deposits thereof.
_ ln the normal production of coal by means of a plan
mg or shaving device it is customary -to impel the device
along -the entire span of the mine face Ibeing worked at
an approximately uniform linear rate of travel. Where
soft coal is to be recovered, such procedures are usually
ing element body and possibly to the driving mechanism,
the same is absorbed by said spring means positioned be
tween the plane edge members and the shaving element
body.
Furthermore, it has been found advantageously in ac
cordance with the pulsating drive method in accordance
with the invention that the total power required for op
erating the pulsating drive mechanism for producing the
coal is significantly less than that necessary for conven
tional continuous uniform impelling force operations.
quite satisfactory. On the other hand, where harder 20 'Ihe pulsating force used in accordance with the inven
coal deposits are encountered, particularly high stresses
tion for impelling the shaving element may be suitably
are exerted on the working parts of the plane device .
As a consequence of these high stresses, the wear and
tear on the driving means is excessive, and unless over
load safety equipment is provided, either the driving
cable or chain impelling the plane device will break or
the driving mechanism will become damaged.
Where
attained in a simple manner by means of a winch-drum
apparatus, which moves periodically back and forth along
a linear path, preferably in the approximate direction of
the impelling movement of the shaving element. Such
linear movement of the winch-drum is superimposed by a
rotary movement as well in such a way that the drum
an overload safety means is installed on the device, al
may be rotated intermittently in increments during each
though the above described accelerated wear and tear
pulsating back and forth period.
30
will not occur, each time the device responds to actua
A cable or chain, which is suitably attached at one end
tion of said safety means the work must necessarily be
to the shaving element, is disposed over said drum at
temporarily halted until the equipment can lbe reset. As
the other end. During each pulsating actuation, the drum
a result, needless man-hours are wasted.
It is an object of the invention to overcome the fore
going drawbacks of conventional planing and shaving
equipment ad to provide a process for the simple, efficient
moves linearly forward and at the same time rotates,
thereby winding a certain increment of the outstanding
cable length thereonto.
On the return movement the
drum exerts a pulling force on the cable, which has now
and expeditious recovery of coal from mineral deposits
been shortened by this increment, and in turn on the
and to provide an apparatus for effecting the same, which
shaving element. Accordingly, the shaving element is
is effective and durable in operation and inexpensive in 40 driven against the mine face with this force and so effects
construction.
the loosening and shaving off of coal.
_
Other and further objects will become apparent from
In the preferred embodiment, the winch-drum is ro
a study of the within specification and accompanying
tatably mounted on a slidable carriage for movement back
drawings, in which
and forth in a direction parallel to the linear path of
FIG. l is a plan view of an embodiment of the driving 45 the shaving element. The back and forth movement may
means in a shaving device in accordance with the inven
,be suitably carried out by means of a crank drive con
tion;
necting rod pivotally attached to the slidable carriage.
FIG. 2 is a top View partially in section of the shaving
In order to avoid distortions or uneven travel of the winch
eiement of the device in accordance with the invention,
carriage, two parallel connecting rods may be used, each
showing its application to the mine face;
50 attached to the carriage at either end of the drum. Ad~
FlG. 3 is a side view of the shaving element in FIG. 2;
vantageously, the two connecting rods, because of the
FIG. 4 is an end View of the shaving element in FIG.
path of their movement, may be utilized to perform the
2, showing means .for mounting same for efficient opera
rotation of the drum in intermittent periodic increments
tion with respect to a biased mine face and showing means
as well. For this purpose the connecting rods have
for conveying extracted coal;
FIG. 5 is a top plan View of part of the means for
imparting a pulsating drive to the shaving element;
FiG, 6 is a side elevation of a modified form of con
struction for imparting pulsating drive to the shaving
eiement, -and
l
FIG. 7 is a diagrammatic top plan View of FIG. 6.
It has been found in accordance with the invention
that by providing the impelling force of the shaving ele
ment as a pulsating force the shaving element may be ad
vantageously applied to the production of coal from a
mine face with extremely good results and without danger
of accelerating the wear and tear of the working parts.
A continuous drive means may be employed for this
purpose such that the impelling force translated to the
55 pivotally mounted therebetween a driving pawl which
co-acts with ratchet teeth disposed on a corresponding
end of the drum winch.
With each forward cycle of
the connecting rods the driving pawl is upwardly urged
against the drum ratchet teeth so as to force the drum
60 to rotate a corresponding increment.
On the return, the
pawl is lowered, passing over several teeth, so that upon
the next cycle the drum will be rotatably advanced a
further increment.
As a particularly important feature of this rotating
drive means may be mentioned the provision for resiliency
in the pawl mounting. This may be accomplished by suit
able means, as for instance by mounting the pawl on
a housing attached to the connecting rods, which housing
contains resilient shock-absorbing means, such as a coil
shaving element is effected in limited pulsating degrees. 70 spring, whereby to absorb any excessive counter-forces
The shaving element preferably carries shaving or chip
causedl by resistance of the mine face to the shaving
ping plane edge members, which may be resiliently dis
action. This resilient feature of the drum rotating ap
3,071,355
3
paratus may be considered as an overload safety mecha
nism, and one which does not require resetting after it
is caused to come into play.
Thus, where excessive resistance is encountered by the
shaving element, instead of the drum jamming or the CTI
cable breaking as a consequence of the unyielding pul
sating force, the resistance is absorbed by the resilient
means, as for example a coil spring arrangement.
It
4
is partially effected as pulsating linear force and par
tially as pulsating rotary force on the winch-drum 18
by means of pivot 16, connecting the far end of each
connecting rod 15 to a slidable frame 17.
Winch-drum 18 is rotatably mounted on slide frame
17 for both rotational travel thereon and linear forward
and backward travel therewith.
Slide frame 17 is ar
ranged for sliding along guide surface member 19, which
is positioned on base 10. Thus, upon rotation of wheel
will be appreciated that the coil spring should be pro
13a in the direction of arrow 20 in response to driving
10
vided with means for adjusting the tension thereof, de
motor
11, a forward and backward linear movement of
pending on the type of mine face to be worked and the
frame 17 carrying winch-drum 18 along guide surface
concomitant degree of resistance to be expected.
member 19 is effected. Traction line 21, which may be
In connection with the mechanism for rotating the
any suitable chain or cable, is thereby pulled in longi
drum, in order to prevent backlash or reverse rotation
‘.udinal direction toward motor 11 and then wound a
of the drum during the return cycle, the drum carriage
given increment during each cycle.
is provided with non-reverse pawl means, preferably
Simultaneously with this linear forward and backward
on the opposite side of the drum from that at which
movement is a super-imposed rotary movement of drum
the driving pawl is located. Only such non-reverse pawl
13, which is effected by means of pawl 22 which is urged
means is used which preferably engages the same ratchet
teeth on the corresponding end of the drum in such a way "
that the drum may be advanced but not reversed, in
direction.
As a consequence of this resilient overload safety fea
ture, preferably in conjunction with displaceable plane
against ratchet teeth 24 located on the periphery of one
end of drum 18. Pawl 22 is pivotally mounted on a
shaft connecting corresponding lever arms 23 which are
in turn pivotally connected as a unit at their opposite
ends to connecting rods 15. Lever arms 23 are also
resiliently connected to corresponding connecting rods
edge members, excessive stresses on the working parts
15 by means of a spring connection 25. The lever arms
are avoided. Thus, where unduly high resistance of the
23 on either side are preferably rigidly interconnected.
coal face to the pulsating drive is encountered, it will be
The tension of spring connection 25 may be suitably ad
preferably absorbed, if not too great, by the resiliently
by turning nut 26.
displaceable plane edge members so that these members 30 justed
Spring connection 25, is in the form of a coil spring,
will not break nor will theplane element carrying them
is seated in its lower end in the recess 25b indicated in
be damaged. Nevertheless, where the resistance is too
dotted line FIG. l, said recess being provided within
great to be counteracted in this way, the excessive re
the plate 25a. The upper end of spring connection 25
sistance to the pulsating force will be passed on to the
abuts the under side of bridge 23a (seen more clearly
resilient overload safety driving pawl mounting, whereby 35 in
FIG. 5). Bridge 23a is attached at either end to the
the excessive force will be completely absorbed.
corresponding lever arms 23. A screw 26a having its
According to another embodiment of the invention, the
head 261) against the under side of plate 25a passes
pulsating force may, however, be imparted to the shav
through a bore opening in plate 25a, thence through the
ing element by an arrangement which is simpler and
core of the spring connection 25, a bore opening in bridge
cheaper -to produce than that above-referred to.
40 23a, and finally through the brace member 15a, where
The general principle of the apparatus remains the
same, in that a cable or chain also pulls the shaving ele
ment forward with a pulsating movement and a spring
upon the nut 26 on the upper end of screw 26a main
tains the proper tension of the spring connection 25. As
may be more clearly seen from FIG. 5, brace member
pulls it back from the working face when the tension
15a extends across the space between the connecting rods
exerted bythe cable slackens.
45 15 inter-connecting the same at their upper edges. Thus,
However, in this modified form of construction, the
the upward movement of lever arms 23 may he said to
cable or chain running on to the winding drum is guided
be limited by the over-riding brace member 15a with re-over a reversing pulley which is loosely mounted on a
spect to upward pivotal movement, while the same are
A slipping clutch is
preferably ñtted at a suitable point between the driving 50 limited in a downward direction by virtue of the spring
connection 25.
means and the drum so that, in the event of overload
In normal operation, during each pulsating revolu
ing due to the shaving element unexpectedly encounter
tion of wheel 13a, pawl 22 serves to advance winch
ing high resistance, damage to t'ne driving means will im
drum 18 in Ithe direction of the arrow 20a a given incre
mediately be prevented.
ment,
since connecting rod 15 travels upwardly and for
Another advantage of this construction is that the 55 wardly. Non-reverse pawl 27, located on the far side
drum can be rotated continuously and at a uniform speed.
of drum 18 and pivotally connected to slide frame 17,
In spite of this, the desired fluctuations in the tension of
releases teeth 24 during such advance. However, on
the driving element are attained merely by the fact that
the return cycle of wheel 13a and movement of slide
the reversing pulley itself performs a back and forth move
frame 17 backwardly, pawl 27 prevents reverse rotation
ment which, for the sake of simplicity, is produced by a 60 of drum 18, which may be otherwise caused by the ten
rotary eccentric or a rotary crank shaft.
sion thereagainst of traction line 21.
Thus, the coal production may proceed for the most
Nevertheless, if the resistance to the force of motor
part automatically, the only operation really necessary
11 caused by the mine face and transmitted by line 21 is
being that for directing the path of the shaving apparatus
excessive, then pawl 22 will yield due to the resiliency
and for adjusting the tension of the resilient overload 65
of the mounting by spring connection 25 on connecting
safety mechanism to the type of coal face encountered.
rod
15. The motor mechanism will not be damaged,
Referring to the drawing, FIGS. 1 and 5 show a pul
inasmuch as the slide frame 17 continues its limited linear
sating driving means in accordance with the invention,
path unrestricted due to this automatic resilient safety
having a base 10 on which is mounted at one end
feature, even though the drum 18 is not advanced dur
driving motor 11 connected by coupling 12 to transmis
ing the cycle. When the excessive resistance by line 21
sion box 13. On either side of transmission box 13 is
rotary eccentric or a crank shaft.
a crank shaft drive wheel 13a connected by a correspond
ing pivot 14 to a connecting rod 15. Wheel 13a thus
transmits the driving force of motor 11 to the near end
of the corresponding connecting rod 15.
The force 75
is overcome or its cause removed, the pawl 22 will come
back into play and advance the drum 18 the given incre
ment.
In FIGS. 2, 3 and 4 the cutting or shaving element
5
3,071,355
29 is shown, mounted for slidable travel back and forth
over track frame 28 and urged forward at one end
against the mine face 31 by traction line 21. Plane edges
30 are mounted as a unit along a base strip 38 at a slight
`ly inclined angle at either end of the shaving element 29
so that cutting of the mine face 31 in either direction
will -be facilitated. Strip 38 in turn is carried by shafts
36, received within spring sleeves 34 and 35 located in
side shaving element 29. Spring plate 37 separates springs
6
interconnecting said shaver element with said driving
means, said drawing means transmitting intermittent,
unilateral pulsating forces from said driving means to
*saidy shaver` element to force said shaver element uni
laterally in increments in a linear direction.
2. A shaving apparatus comprising a shaver element
arranged for linear movement along an extended path'
of travel adjacent a mine face, said shaver elemen-t hav
ing cutting means disposed thereon for engagement with
32 and 33, which surround shafts 36, and serves to re 10 the mine face, a pulsating `driving means separate and
siliently absorb via said springs any slightly excessive re
remote from said shaver element and stationarily posi
sistance caused by the mine face 31 and transmitted to
tioned with respect `to the movement of said shaver ele
„shafts 36.
ment along the path of travel, and cable means intercon
Where the resistance met is toov great to be absorbed
necting said pulsating driving means and said shaver ele
by springs 32 and 33, the entire force of the shaving ele
ment, said cable means transmitting intermittent pulsat
ment 29 is brought against strip 3S, closing the space
ing forces from said driving means to said shaver ele
therebetween so that the resistance is passed on via trac
ment to force said shaver element along the path of travel
tion line 21 to drum 18. Because of the automatic safety
in increments.
feature provided in the resilient mounting of pawls 22,
3. A shaving apparatus comprising a shaver element
no damage is done to the driving mechanism. The linear 20 arranged for linear movement along an extended path of
travel merely continues in pulsating fashion without at
travel adjacent a mine face, said shaver element having
tendant drum rotation until the cause of the excessive
cutting means disposed thereon for engagement with the
resistance is removed.
Usually, however, the pulsating actionof the shaving
mine face, and operatively independent pulsating driving
means separate and remote from said shaver element and
element 29 will cause cutting edges 30 to chip away, 25 stationarily positioned with respect to the movement of
little by little, the portion of the mine face causing the
said shaver element along the path of travel, and cable
excessive resistance until the rotation of the drum can be
'means interconnecting said pulsating driving means and
effected once more. Then the rotation will again take
said shaver element, said cable means transmitting inter
place, no stopping-of the operation or resetting of the
mittent, unilateral, pulsating forces from said driving
30
safety mechanism being necessary. The shafts 36 also
means to said shaver element to force said shaver element
readily return to their former position, wherein the strip
Yalong the path of ktravel in increments, said pulsating
38 again becomes spaced from the shaving element 29.
driving means having take-up means for shortening the
lt wil-l be seen that pulsating may be further effected
length of said cable means in increments corresponding
by displacing cutting edges 30 back and forth over a
to the increments of travel of said shaver element dur
short distance via springs 32 and 33 during each cycle,
ing each pulsating cycle of said driving means.
if desired, by adjusting the tension of these psrings in
4. A shaving apparatus according to claim 3 wherein
relation to `the pulsating force and the resistance to be met.
said shaver element is provided with a plurality of cutting
In the construction shown in FIGS. 6 and 7, the winch
means disposed thereon, said cutting means being carried
can be arranged stationary on a frame. This frame also
as a unit on a common brace member resiliently connected
carries a cable or chain -drum 40 driven by a motor 43 40 to said shaver element.
‘through the intermediary of a gear transmission 41 and
42. A sliding clutch or some other device safeguarding
against breakage can be introduced in this gearing.
A crank shaft 45 mounted in Ithe winch frame is also
driven by the gearing 41, 42 through the intermediary of
a gear wheel 44. ,
._ The cable 43 wound on the drum' 40 does not extend
directly to the shaving element. but ñrst passes over a
Ireversing pulley 47. Owing to the fact that this reversing
pulley is moved back and forth by the rotation of the
crank shaft 45, the pulsating tension is produced in the
cable 48 which has been found particularly advantageous
for removing exceptionally hard and tough coal by
5. A shaving apparatus comprising a shaver element
arranged for linear movement along an extended path of
travel adjacent a mine face, said shaver element having
cutting means disposed thereon for engagement with the
mine face, and operatively independent pulsating driving
means separate and remote from said shaver element and
4stationarily positioned With respect to the movement of
said shaver element along the path of travel, and cable
means interconnecting said pulsating driving means and
50 said shaver element, said cable means transmitting inter
mittent, unilateral pulsating forces from said driving
means to said shaver element to force said shaver element
along the path of travel in increments, said pulsating
driving means having take-up means for shortening the
v,means of a planing or shaving element in which the
¿cutting edges of the shaving element are arranged mov 55 length of said cable means in increments, corresponding
able in relation to the body of the shaving element against
.to the increments of travel of said shaver element during
the action of a spring.
each pulsating cycle of said driving means, including a
rotary crank drive means linkably connected byV connect
It will be understood that, while a strip 38 has been
shown for resiliently mounting cutting edges 30 with re
ing rod means to a frame means slidable in a forward
spect to springs 32 and 33, cutting edges 30 may also be 60 and backward linear direction, said rotary crank drive
means driving said connecting rod means in limited -for
individually mounted directly on separate shafts 36, each
_ward and upward direction during the lirst half of each
.resiliently connected by means of springs 32 and 33 to
the shaving element 29.
cycle and in limited backward and downward direction
during the second half of each cycle, and said connecting
FIGURE 4 shows a biased coal face, indicating that
the mining operation in accordance with the invention 65 rod means in turn forcing said frame means in a limited
forward and backward linear direction respectively, dur
may be carried out at any angle. In this figure, the coal
ing each cycle, a winch means being rotatably mounted
which is shaved or chipped by the pulsating action is
on said frame means for linear travel together with said
received in conveyor trough 39, which is mounted
frame means, said cable means being connected to said
»thereunder for that purpose within frame 28.
driving means by disposition on said winch means and
What is -claimed is:
1. A shaving apparatus comprising a shaver element
' link means being positioned on said connecting rod means
arranged for linear travel having cutting means disposed
thereon, a stationary, operatively independent, unilateral
for rotation of the winch means by rotatably advancing
in releasable rotational engagement with said winch means
>said winch means in increments during the ñrst half of
pulsating driving means, and a >unilateral drawing means 75 each cycle and in turn shortening the length of the cable
3,071,355
c
7
on said frame means for linear travel together with said
frame means, said cable means being connected to said
driving means by disposition on said Winch means and
pawl means resiliently mounted on said connecting rod
means in corresponding increments by winding said cable
means on said winch means.
6. A shaving apparatus according to claim 5 wherein
said shaver element is forced forward in a linear direc
tion during each backward movement of said frame means
a distance corresponding to the linear increment said
means and ratchet teeth defined on said winch means,
said pawl means releasably engaging said ratchet teeth
and rotatably advancing said winch means in increments
during the limited forward and upward travel of said
connecting rod means by engagement with said ratchet
frarlne means travels during >the second half of each said
cyc e.
7. A shaving apparatus comprising a shaver element
arranged for linear movement along an extended path of
travel adjacent a mine face, said shaver element having
teeth for rotation of the winch means by rotatably advanc
ing said winch means in increments during the ñrst half
of each cycle and in turn shortening the length of cable
means in corresponding increments by winding said cable
cutting means disposed thereon for engagement with the
mme face, and operatively independent pulsating driving
means on said winch means, said pawl means, upon exces
means separate and remote from said shaver element and
sive resistance to said pulsating driving means caused by
counter-forces exerted against said cutting means, resil
stationarily positioned with respect to the movement of
said shaver element along the path `of travel, and cable
iently yielding to and absorbing said forces, preventing
said counter-forces from acting directly against the forces
means interconnecting said pulsating driving means and
said shaver element, said cable means transmitting inter
exerted by said pulsating driving means.
9. A shaving apparatus according `to claim 8 wherein
the resilient mounting of said pawl means includes spring
mittent, unilateral pulsating forces from said driving
means to said shaver element to force said shaver element
along the path of travel in increments, said pulsating driv
ing means having take-up means for shortening the length
of said cable means in increments corresponding to the
increments of travel of said shaver element during each
pulsating cycle of said driving means including a rotary
crank drive means linkably connected by connecting rod
means to a frame means slidable in a forward and back
ward linear direction, said rotary crank drive means driv
'mg said connecting rod means in limited forward and
upward direction during the first half of each cycle and
in limited backward and downward direction during the
second half of each cycle, and said connecting rod means
means connecting said pivotally mounted pawl means to
said connecting rod means.
l0. A shaving apparatus according to claim 9 wherein
the tension of said spring means is adjustable.
11. A shaving apparatus according to claim 8 wherein
said counter forces are at least partially absorbed by
means of limited displacement resilient means connecting
said cutting means to said shaver element.
12. A shaving apparatus according to claim 8 wherein
30
in turn forcing said frame means in alimited forward and
separate releasable locking pawl means in engagement
with said ratchet teeth is provided for preventing reverse
rotation of said winch means during the second half of
backward linear direction, respectively, during each cycle,
each cycle.
means for linear travel together with said frame means,
said cable means being connected to said driving meansby
disposition on said winch means and pawl means pivotally
mounted on said connecting rod means and ratchet teeth
defined on said winch means, said pawl means releasably
ratchet teeth with respect to advancing rotational direc
tion, yet is in locking engagement with said ratchet teeth
13. A shaving apparatus according to claim l2 wher_e_in
a winch means being rotatably mounted on said frame 35 said locking pawl means is pivotally connected to said
engaging said ratchet teeth and rotatably advancing said
frame means and is in releasable engagement with said
with respect to reverse rotational direction.
14. A shaving apparatus comprising a shaver element
arranged for linear movement along an extended path of
travel adjacent a mine face, said shaver element having
cutting means disposed thereon for engagement with the
winch means in increments during the limited forward
and upward travel of said connecting rod means by en
gagement with said ratchet teeth for rotation of the winch
mine face, and operatively independent pulsating driving
means by rotatably advancing said winch means in incre 45
means separate and remote from said shaver element and '
ments during the iìrst half of each cycle and in turn short
stationarily positioned with respect to the movement of
ening the length of the cable means in corresponding in
said shaver element along the path of ltravel, and cable
crements by winding said cable on said winch means.
means interconnecting said pulsating driving means and
8. A shaving apparatus comprising a shaver element
arranged for linear movement along an extended path of 60 said shaver element, said cable means transmitting inter~
mittent, unilateral pulsating forces from said driving
’travel adjacent a mine face, said shaver element having
means to said shaver element .to force said shaver element
cutting means disposed thereon` for engagement with the
‘mine face, and operatively independent pulsating driving
along the path Aof travel in increments, said pulsating
driving means having take-up means for shortening the
means separate and remote from said shaver element and
stationarily positioned with respect to the movement of 55 length of said cable means in increments corresponding
said shaver element along the path of travel, and cable
to the increments of travel of said shaver element during
means interconnecting said pulsating driving means and
each pulsating cycle of said driving means including a
said shaver element, said cable means transmitting inter
loosely mounted eccentrically rotating means in linkage
mittent, unilateral pulsating forces from said driving
with a rotatable drum, said cable means being guided
means to said shaver element to force said shaver ele 60 over said eccentrically rotating means and wound upon
ment along the path of travel in increments, said pulsat
said drum.
ing driving means having take-up means for shortening the
15. A shaving apparatus according to claim 14 wherein
length of said cable means in increments corresponding
a slipping clutch is provided in the driving linkage of said
to the increments of travel of said shaver element during
each pulsating cycle of said driving means including a 65 driving means.
rotary crank drive means linkably connected by connect
References Cited in the ñle of this patent
ing rod means to a frame means slidable in a forward
UNITED STATES PATENTS
.and backward linear direction, said rotary crank drive
Vmeans driving said connecting rod means in limited for
Lobbe _______________ __ lan. 18, 1955
ward and upward direction during the first half of each 70 2,699,930
cycle and in limited backward and downward direction
FOREIGN PATENTS
during the second half of each cycle, and said connecting
rod means in turn forcing said frame means in a limited
forward and backward linear direction, respectively, dur
ing each cycle, a winch means being rotatably mounted 75
1,094,480
717,033
France _______________ _, Dec. 8, 1954
Great Britain _________ -_ Oct, 20, 1954
Документ
Категория
Без категории
Просмотров
0
Размер файла
904 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа