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Патент USA US2118202

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May 24, 1938.
c_ HUENLKZH ET AL
2,118,202
RECORD SHAVINC- MACHINE
Filed April 3, 1937
16‘ 25
'
_
1
INVENTOR
'
Char~_les Huenl lie/z.
Salim/?x!» El'lax Gramann
aTTORN EY
2,118,202
Patented May 24, 1938
UNITED STATES PATENT OFFICE
2,118,202
RECORD SHAVING MACHINE
Charles Huenlich, Bloom?eld, and Heinrich F.
Max Gramann, Orange, N. J., assignors to
Thomas A. Edison, Incorporated, West Orange,
N. J., a. corporation of New Jersey
Application April 3, 1937, Serial No. 134,724
14 Claims. (Cl. 82--1.1)
This invention relates to machines for shav
ing sound records, and more particularly to the
control of the record-engaging tool for perform
ing the shaving operation.
ing or mutilating the record and also in dam
aging the knife itself.
It is an object of the present invention to pro
vide for a machine of the character described an
Sound record cylinders are made of wax-like
material and when used in connection with busi
ness phonographs, it is customary, after dictated
improved shaving knife adjusting and controlling 5
material has been recorded on the cylinder and
tion is effectually prevented.
the record transcribed, to resurface the cylinder
10 by shaving off the outer surface portion thereof
means, whereby forward movement of the knife
upon the release thereof when in operative posi
'
Another object of the invention is to provide
in such a machine a construction which will re
so as to prepare it for receiving a new record
tain the knife locked in operative position until
thereon. Such a cylinder is commonly referred
to as a “used” record, but it is also customary to
shave off the outer surface portion of a new cyl
15 inder to provide the same with a smooth properly
such time as the forward bias thereon is rendered
ineffective and the means for retracting said knife
prepared surface to be recorded upon. There
fore, the term “record” as used herein connotes
a Wax or other tablet having a surface either
adapted to receive and bear or already bearing a
20 sound track.
to inoperative position becomes effective.
Another object of the invention is to provide
a shaving machine construction whereby the re
sults just described are attainable and wherein
the adjustment of the knife to operative position
and the locking thereof in such position are ef
fected by a single manipulation and preferably
The resurfacing operation, as ordinarily per
also wherein the release or unlocking of the knife.
formed, involves the use of a machine having a
shaving knife which is mounted on a carriage and
and the retraction thereof to inoperative position
is adapted to traverse a rotatably mounted record
25 cylinder while held in operative relation with re
spect thereto. Means are provided for moving
the knife to and looking it in an operative or set
position Within ?xed limits so that it will take
a cut of desired depth as the cylinder is rotated;
30 and also for retracting the knife from opera
tive position upon the unlocking thereof. In
certain types of shaving machines the locking of
the knife in set position is incidental to the op
eration of bringing the knife to such position, and
35 ‘ these operations are effected by a single actua
tion of an operating lever or member. For ex
are likewise effected by a single manipulation.
Another object of the invention is the provision
of a shaving machine having the features of
automatic adjustment of the knife with respect to
the record cylinder, locking the knife in adjusted
position and delaying the release of the knife
until all forward bias thereon has been overcome
and the means for retracting the knife to inopera- 30
tive position is ready to function.
Other objects and features of the invention will
be hereinafter more fully described and claimed.
In order that our invention may be more clear
ly understood, attention is directed to the accom
ample, such machines are disclosed in Edison
panying drawing forming a part of the speci?
cation, and in which
Patent No. 465,972, dated December 29, 1891, and
Schiffl Patent No. 1,174,292, dated March 7, 1916.
machine to which the invention has been applied;
However, in such prior art machines there are
certain disadvantages inherent in the construc~
tions employed for moving'the shaving knife to
and locking the same in operative position and
for subsequently effecting the retraction of said
45 knife to inoperative position. One such disad
vantage is that when the knife is secured in op
erative position it is urged or biased towards the
cylinder by a spring comprising part of the knife
adjusting and controlling means, with the result
10.
3.5
Figure 1 is a plan view of a record resurfacing
FigureZ is a cross sectional View taken along 40
the line 2-2 of Figure 1;
Figure 3 is a fragmentary cross sectional view
taken along line 3—-3 of Figure 2;
Figure 4 is a side elevational view, partly in
section, showing the knife in a set position;
Figure 5 is a view similar to Figure 4 but with
some of the parts shown in different positions;
and
Figure 6 is a perspective View of a cam which
that the knife, immediately upon being released
comprises part of the mechanism for controlling 50
or unlocked, moves or surges forward against
forward movement of the knife before its re
the knife.
Referring to Figure 1 of the drawing, the shav
ing machine therein illustrated comprises a base
traction from set or operative position is ob
jectionable in that it is likely to result in goug
hand standards 4 and 5 and an intermediate 55
the cylinder under the action of said spring. This
plate I having left-hand standards 2 and 3, right
2
2,118,202
standard 6. A conically pointed stud ‘I is pro
vided in the standard 2 for engaging a recess in
the left end of a shaft 8, thus providing a thrust
bearing for said shaft end. The shaft 8 passes
through an oversized hole 9 in the standard 6 and
a collar H secured thereon prevents the shaft
from being completely disengaged from the stud
‘I. The shaft 8 comprises a portion of a mandrel
l2 onto which may be slid a sound record A into
frictional engagement therewith, by virtue of the
mandrel l2 and the bore of the record A being
complementarily tapered. The construction de
scribed retains the mandrel in an approximate
position only; to maintain the same in proper
position during rotation thereof, a supporting
means is provided
with and adapted
mandrel l2. This
swinging end-gate
which is removably associated
to engage the free end of the
supporting means comprises a
l3 carrying an adjustable con
ical stud i4 adapted to engage a recess in the ad
jacent end of the mandrel l2. The gate !3 is
pivoted to a boss [5 on the base plate I and is
closed, as illustrated in Figure 1, by clockwise
movement about its pivot until its fwrward ex
25
tremity impinges against the right-hand extrem
ity of a guide-rail IS, in which position it may be
releasably held by a suitable lock l3’.
As this
construction is well known in the art, being dis
closed, for example, in the above mentioned
30 Edison Patent No. 465,972, it is only convention
ally illustrated here. Suf?ce it to say that when
the gate I3 is moved to closed position, the man
drel i2 is wholly supported by ‘the studs 1 and M
for rotation about a ?xed axis and without appre
ciable end play. When thus supported, the man
drel I2 is in true parallel relation with the guide
rail I6 and a record thereon may then be rotated
for resurfacing. The driving means for rotating
the mandrel l2 usually includes‘ a motor (not
40 shown) within a cabinet for the base plate I and
adapted to drive, by means of a belt H, a pulley
l8 secured to the shaft 8. To accommodate the
belt I‘! there is provided in the base plate a suit
able
45
slot.
'
'
'
'
In resurfacing a record cylinder by a machine
of the character illustrated, a thin outer surface
layer is removed from the cylinder by means of a
record-engaging tool illustrated herein as a knife
20. The knife 20 is secured to the end ofabar
50 2| which is adjustably positioned in a boss 22
formed upon ,a movable arm or carriage 23. The
carriage 23 is slidably and tiltably mounted on a
rod 24, the latter being disposed behind and par
allel to the mandrel shaft 8 and suitably secured
55 to the standards 2 and 4. The arml23 is approx
imately semicircular in side elevation’ and is pro
vided with a smooth flat under-surface (see Fig
ure 2) at its forward extremity. A weight 25,
formed integrally with the arm 23, provides a'
60 convenient handpiece normally maintaining the
said under-surface in contact with the top sur
face of the guide rail l6. By this arrangement
it will be seen that the arm 23 may be tilted so
as to bring the knife 20 to engaging or disen
gaging position with respect to the surface’ of
the record cylinder A.
_
The carriage 23, including its associated parts,
is designed to traverse the record surface during
rotation thereof. This is accomplished by pro
70 viding a feed screw 21 parallel to the carria‘gerrod
24 and journalled on standards 3 and 5. The feed
screw 21 is rotated during rotation of the man-_
'drel [2 by means of a belt 28 engaging a pulley
29_ secured to said screw and a driving pulley
75 30 secured to the mandrel shaft 8.
A feed nut‘
3| is arranged to engage the feed screw 27 when
the arm 23 rests on the guide rail l6 and to dis
engage said feed screw when the arm is raised.
The feed nut 3| is secured to the carriage 23 by
a resilient extension 32 carried by a sleeve por
tion provided on the carriage. It will, therefore,
be understood that when the knife 20 is in opera
tive position and the mandrel I2 is rotated, the
carriage 23 and hence the knife 2!) will move
steadily longitudinally of the cylinder from right 10
to left, thus taking a uniform cut from. the outer
portion of the cylinder. For disposing of the
shavings cut from the record cylinder there is
provideda chip chute 33 leading to a suitable re
ceptacle (not shown) within the cabinet.
15
The construction described above is old in the
art, the present invention, as already stated, be
ing directed to improvements in the knife ad
justing and controlling means. These improve
ments will now be described, reference being made 20
to such prior art constructions as may be help
ful to a clear understanding of the invention.
A problem to workers in this art has been to so
adjust the record engaging tool or shaving knife
as to obtain a proper depth of out, i. e., a cut that 25
is neither too deep nor too shallow. This re
quires that the knife be adjusted to proper po
sition and locked in that position. As hereinbe
fore indicated, constructions have been proposed
for effecting the knife adjusting and locking op 30.
erations by a single manipulation or actuation of
a lever or other member, such, for example, as the
constructions disclosed in the aforesaid Edison
and Schi?‘l Patents Nos. 465,972 and 1,174,292..
Also a single manipulation of such lever or mem
35:
ber in a reverse direction ?rst effected the re
lease of the knife and thereafter its retraction
to inoperative position.
In such shaving machine constructions, how
ever, the knife has been adjusted or moved to 40
operative position by or through a setting spring
and when locked in operative position was biased
by such spring in a direction towards the record
cylinder. Consequently, when the knife was un
locked, it took an undesirable forward movement 45
or surge under the action of said setting spring
prior to its retraction to inoperative position.
To
avoid this difficulty some means should therefore
be provided to restrain the knife against the for
ward urge or bias of its setting spring until in 50
the operations of unlocking the knife and return
ing it to inoperative position, the knife retract
ing means commences to retract or is ready to
commence retracting the knife. Our invention
provides a construction embodying such restrain
ing means.
55
Referring to the drawing, the knife bar 2| is
slidably mounted in an opening 35 which extends
through the boss 22. A guide rod 35, located to
one side of, and parallel to the knife bar 2!, is 60
threaded
rod 36 extends
into and
through
extends
a sleeve
from the
3'! secured
boss 22. in the
upper end portion of said boss by a forced ?t
therewith, and also extends loosely through an
opening 38 in a block or bridge piece 39 through 65
which the upper end portion of the knife-bar like
wise extends.
The knife bar 2|, however, is se
cured to- the bridge piece 39 so as to move there
with. A strong coiled compression spring 40 is
disposed about the guide rod 35 between the 70
bridge piece 39 and a head 36" provided on the
upper end of said rod.
The head 36’ has a slot
to enable the rod 36 to be readily applied to and
removed from the boss 22 by the use of a screw
driver or the like. The lower portion of the
13
‘aging-202
bridge piece T39 .is counter-‘sunk to‘recei-ve the-ad
jacent end ‘of sleevel3'l.
'Thelboss ‘.22 is provided with a‘cylindrical-rece'ss
4| ‘extending transversely thereof, theaxis of said
recess preferably ‘intersecting the axis of _the
knifebar 2! ‘as clearly'shown in Figure 3. ‘Slid
ably disposed within the recess 4| is va cylindrical
stud pin 42 constituting-a, clamping member and
vhaving a cylindrical transverse opening '43
'10 through which the :knife bar ‘2| extends. ‘Open
ing 43 ‘is slightly larger in. diameter than the
'knife'b-ar so that when the two are-concentrically
positioned the knife bar may slide ‘freely in said
opening. The left-hand portion of member 42
15 (as viewed in Figure 3), which is of reduced di
ameter and threaded, extends outwardly from
the boss 22 a considerable distance. A cylindri
cally headed nut 44 is ‘threaded onto the outer
end portion of member 42, the head of said ‘nut
‘being adjacent the side of the boss 22. An actu
ating ‘lever 45 is provided at its inner end with
two spaced ?anges 45 and 41 by means “of ‘which
normal ‘positions, as shown in Figure '2‘, ‘mech
anism is'employe'd‘iwhich will now bede'scribed.
Thei?an‘ge 41 of ‘lever His-provided ‘with-a cam
surface 160 adapted to contact a pin 6| on the
-pawl358. The rearendlorl'heel'?iof th‘e'leve'r'45
is adapted to engage the ‘adjacent surface 48” of
the locking ‘block 48 when ‘said lever is moved
rearwardly or in ‘a clockwise direction a consider
able‘ distance,’ashereinafter more fully explained.
During the beginning-or early part of such move
ment of lever =45 the icamsur'faceill engages the
pin 5| and thereby lrele'a'ses1the‘pawl'58 (see Fig
ure 4) ‘thus effecting the release of the cooked
cam f52.
Thereupon, the cam 52 immediately
'snapsibac'k ‘and-comes to rest in a position where
its eccentric surface 52' bears against the roller
56 ‘on 'thelbr-idge "piece 35, as shown in Figure 5,
thus providing "a supporting means beneath the
bridge piece 39 ‘which will prevent the-spring 40
54 ‘threaded through opposed sections 49 and 55
from causing the knife ‘bar 2|, upon vthe ‘unlock 20
ing 'thereof,'to move forward from its operative
position. It is not until a considerable further
rearward movement of the lever 45 that the heel
52 thereof engages and turns “the locking ‘block
48 rev'ersely to ‘unlock thereby the ‘knife bar 2|, 7
this lost motion ‘assuring the release of the ‘cooked
cam 52 ‘and ‘the movement thereof to restraining
of said ‘block.
A cam 52 is loosely mounted on the nut 44, and
a torsion spring 5| having its intermediate por
tion disposed around the head of said nut and
the ends thereof respectively engaging ‘an open
ing in the adjacent portion of the boss '22 and the
under face 53 of said cam, normally ‘urges ‘the
brie?y described as follows:
such lever is pivotally mounted on the reduced
portion of nut 44. A split locking block 48 is ad
justably clamped on nut 44 ‘between the vflanges
45 and ~41 of the lever 45, ‘by means of a screw
latter in a clockwise direction.
The cam 52 car
ries a laterally extending pin 54 engagable by the
lever 45, and when so engaged .is adapted to trans
mit movement of said lever to the locking block
48. Considerable lost motion is provided for be
tween the parts just mentioned. For instance,
when the lever 45 is turned counterclockwise or
forwardly from the position shown in Figure 2
to effect the setting or adjustment of the knife
25, it moves freely until its turned-over edge '45’
45 ongages the pin 54; thereafter it moves the pin
54, the cam 52 and the locking block ‘48, the ~pin
54 being positioned between and then in engage
ment with both the said edge 45’ and the ‘upper
face 43' of the locking block.
It will be seen that the ?rst part of such move
50
ment of cam 52 effects the release or disengage
ment of a roller 56 mounted upon the bridge piece
39 from a dwell 52" provided at one end of the
cam surface 52', thus permitting forward move
55 ment of the knife bar 2| under the action of the
spring 45 in the continued forward movement of
lever 45 and cam 52. When the lever 45 has
completed its forward or counterclockwise move
ment, all of the parts controlled thereby will have
60 assumed the positions shown in Figure 4, in which
the knife bar 2| is shown set and locked in op
erative position to shave a record A. As shown
in this ?gure, the pin 54 is then slightly spaced
from the face 48’ of locking block 48 because "of
65 the retractive force exerted upon the cam 52 by
the torsion spring 5|. Full retraction of the cam
52, however, is prevented by virtue of the engage
ment of a spring-pressed locking pawl 58 with a
notch 59 provided in the edge of said cam (see Fig
70 ures 4 and 6). When the cam 52 is thus held by
the locking pawl 58, it is cocked or preconditioned
to retract further immediately upon its release.
To cause the release of the cam 52, and there
after unlock the knife bar 2| and effect the re
75 traction of the knife and associated parts to their
position with _respect ‘to the knife bar, If the
knife ‘bar were not thus restrained upon being
unlocked when in operative position, it would 1'
surge forward and go'uge'th'e Trec'or'd "cylinder A.
The operation of that ‘embodiment of our in;
vention herein speci?cally disclosed, may 'be
‘
With the parts positioned as show-n in Figures
land 2, a record cylinder A is mounted on the
mandrel -'|2 and ‘the end-gate I3 is locked ‘in
closed position. The knife bar 2| is held in unset
or inoperative position and the lever -45 is fully
retracted.
By a forward or counterclockwise 40
movement of the lever '45 the dwell 52"’ in the
eccentric surface 5-2’ of the cam 52 is caused to
disengage the roller 56 and the spring 40 moves
the knife bar forwardly to bring the knife 25
into operative cutting position with respect to
the cylinder A as above described. As the for
ward movement of the lever “45 continues the
locking mechanism becomes effective and upon
the completion of the movement of said lever, the
knife bar 2| is locked in adjusted or set position
and the pawl 58 engages‘ the notch '59 of cam 52
to hold the latter in cocked condition. The knife
25 is ‘then in operative position to shave the
record when the latter is rotated by the mandrel
l2. Upon ‘the completion of the shaving opera
tion, the mandrel I2 is stopped and the lever 45
is moved in a clockwise direction to effect the
release of the knife bar 2| and the retraction
thereof to inoperative position. As is obvious
from the above description, the elements com
prising the knife bar adjusting and controlling
mechanism function in the ‘reverse order to that
followed in effecting ‘the setting and locking of
the knife bar. A summary of this order may be
given as follows.
65
Upon the disengagement of the pawl 58 from
the notch 59 effected by the cam surface 50, the
cam 52, under the in?uence of spring 5|, snaps
quickly rearwardly until its eccentric surface 52’
engages the roller 56 and thereby provides a
support adapted to prevent forward movement
of the knife bar 2| under the urge of the spring
40. By thus overcoming the forward bias of the
spring 40 on the knife bar prior to the release
of the locking mech'anism,the restraining of the
4
2,118,202
knife bar 2| from any forward movement what
ever when the unlocking thereof is actually ef
fected in the continued rearward movement of
the lever 45, is assured. The rearward move
ment of said lever and of cam 52 is limited by a
shoulder provided at the rear end of the eccen
tric surface 52' of the cam, coming in contact
with a stop 10 secured by means of a screw ‘H
to the boss 22. The cam 52 is releasably held in
10 this position by the engagement of the roller 55
with the shallow dwell 52” in the cam surface
52'. In its fully retracted position the knife bar
is clear of the record cylinder but is conditioned
to move toward the same as soon as the cam 52
15 is moved in a counterclockwise direction by the
lever 45.
‘
While we have described a preferred embodi-v
ment of our invention, it is to be understood that
various modi?cations thereof may occur to those
20 skilled in the art which will be within the spirit
of our invention and the scope of the appended
claims.
'
What we claim is:
1. In a record’ shaving machine, the combina—
25 tion with a rotatable support for a record to be
shaved, of a knife bar, and means for setting
said bar in operative position relative to a record
on said support and for retracting the bar from
such position, said means comprising mechanism
30 for locking said bar as an incidental operation
to the operative positioning thereof, said mecha
nism including a device embodying a lost motion
connection and adapted to prevent forward
movement of the bar prior to its retraction from
35 operative position. .
2. In a record shaving machine, the combina
tion with a rotatable support for a record to be
shaved, of a knife bar, means for effecting adjust
ment of said bar relative to a record on said sup
'40
port and for looking it in an adjusted position,
means associated with said bar which when the
latter is in adjusted position biases it in the
direction of the record, and means responsive to
the operation required to unlock the knife bar
overcoming said bias thereby to prevent for
.45 for
ward movement of the knife bar under such bias
upon the release thereof.
3. In a record shaving machine, the combina
tion with a record support, of a knife bar,’ and
50 means for setting and securing said knife bar in
an operative position with respect to a record on
" said support, said means comprising knife bar
adjusting and locking mechanism embodying a
spring which when the knife bar is in operative
55 position urges the latter toward the record, and
means rendered effective in response to the oper
ation of unlocking the knife bar for overcoming
the said urge of the spring. '
4. In a record shaving machine, the» combina
60 tion with a rotatable support for a record to be
shaved, of a knife bar, and mechanism operable
to effect the adjustment of said bar to. and the
locking thereof in, operative'position relative to
a record on said support, said mechanism-com‘
65 prising a device which when said bar is in an
adjusted position urges the same towards the
record; and means rendered effective in response
to the operation of unlocking the knife bar for
overcoming such urge on said bar thereby to pre
70 vent forward movement of the bar upon the re
lease thereof.
-
on said support, said means including a resilient
device which when said knife bar is in operative
position biases the same toward the record,
means for locking said bar in an adjusted posi
tion, means whereby said locking means is ren
dered effective as ‘an incident to the operative
positioning of the knife bar, and means opera
tive to release said bar and retract it from opera
tive position sequentially and to overcome the
forward bias on said bar at all times between the
release and subsequent retraction thereof.
6. In a record shaving machine, the combina
tion with a rotatable support for a record to be
shaved, of a knife bar, means for adjusting said
knife bar to operative'and inoperative positions 15
relative to a record on said support, means for
locking said bar in operative position, a lever for
effecting and controlling the operation of said
adjusting and locking means, said adjusting
means including a device which when said bar is
in operative position biases the same towards the
record, said lever being adapted by a single
manipulation to effect the adjustment of said bar
to and the locking thereof in operative position,
and means interposed between said lever and said
bar adapted upon another single manipulation
of the lever to effect said operations inversely and
to prevent any forward movement of said bar
upon the unlocking thereof.
7. In a record shaving machine; the combina 30
tion with a rotatable support for a record to be
shaved; of a knife bar; and means including an
actuating lever and adapted upon one manipula
tion of such lever to effect the adjustment of said
bar to and the locking thereof in operative posi
tion relative to a record on said support, and
upon another manipulation of such lever to effect
the unlocking of said bar and the retraction
' thereof from‘ operative position, said bar when in
operative position being biased toward the record,
said means including cooperative members ca
pable of relative movement, said members provid
ing between said lever and bar a lost motion which
is effective in the initial phase of the unlocking
operation to delay the release of said bar until 45
supported by one of said members whereby, when
said bar is ?nally released, any movement thereof
toward the‘record is prevented.
8. In a record shaving machine, the combina
tion with a record support, of a knife bar, means '
50
for effecting movements of said knife bar to
operative and inoperative positions relative to a
record on said support and the locking of the bar
in operative position, said means comprising a
lever and resilient means associated with said 55
bar and said lever, said resilient means when the
knife bar is in operative position biasing the lat
ter toward the record, and means adapted to
restrain the knife bar against movement under
said bias, said lever upon movement in one direc 60
tion ?rst effecting the movement of said bar into
operative position and the incidental locking
thereof against further movement until released
upon a reverse movement of said lever, said re
verse movement being attended by an inactive
period in the knife bar releasing operation during
which said restraining means is rendered effec
tive thereby to prevent any forward motion of
said bar prior to its retraction from operative
position.
'
'.
9. In a record shaving machine, the combina
70
5. In a record shaving machine, the combina
tion with a rotatable support for a record to be
tion with a rotatable support for a record to be , shaved, of a knife bar, a lever, a spring-pressed
shaved, of a knife bar, means for adjusting said cam, a locking block movable by said lever to
knife bar to operative position relative to a record
eifect the locking of said bar in an operative posi
75
2,118,202
BI
tion relative to a record on said support and the
unlocking thereof, said cam being controlled by
said locking block and said lever, a pawl for look
another manipulation to effect the unlocking of
said cutter and the retraction thereof from
operative position, said cutter when in operative
position being biased toward the record, said
means also including cooperative elements capa
ble of relative movement, said elements providing
between said actuating member and cutter a lost
motion which is effective in the initial phase of
ing said cam against the action of its spring, a
bridge member carried by said knife bar and
having a part in the path of said cam, and means
operable by said lever for effecting the engage
ment and disengagement of said pawl with said
cam‘, said engagement being effected at the com
10 pletion of the knife bar locking operation and the
disengagement being effected at the beginning of
the knife bar unlocking operation, the said cam
being engaged with said bridge member through
the action of the cam spring in the ?rst part of
15
5
relative to a record on said support, and upon
the unlocking operation whereby movement of the
knife bar forwardly of its operative position is
the unlocking operation to delay the release of 1O
said cutter until one of said elements is posi
tioned to coact with the cutter thereby to pre
vent movement of the latter, upon the release
thereof, toward the record.
13. In arecord shaving machine; the combi 15
nation with a record support; of a cutter; and
prevented.
mechanism for effecting movements of said cutter
10. In a record shaving machine; the combina
tion with a rotatable support for a record to be
shaved; of a cutter mounted for movement to
ward and from said support; and mechanism for
to operative and inoperative positions relative to
setting said cutter in operative position relative
to a record on said support and for retracting
the cutter from such position, said mechanism
25 comprising means for locking the cutter in opera
a record on said support and the locking of the
cutter in operative position, said mechanism com 20
prising an actuating member, resilient means
adapted when the cutter is in operative position
to bias the latter toward the record, and means
adapted to restrain the cutter against movement
under said bias, said actuating member upon 25
tive position and a device embodying a lost mo
movement in one direction ?rst effecting move
tion connection adapted to prevent forward
movement of the cutter prior to its retraction
from operative position.
ment of said cutter to operative position and
the incidental locking thereof against further
movement until released upon a reverse move
ment of such member, said reverse movement be
11. In a record shaving machine, the combi
nation with a rotatable support for a record to I ing attended by an inactive period in the cutter
be shaved, of a cutter, means for adjusting said releasing operation during which said restrain
ing means is rendered effective thereby to pre
cutter to operative and inoperative positions rel
vent any forward movement of said cutter prior
ative to a record on said support and for locking
to its retraction from operative position.
35 the same in operative position, an actuating
14. In a record shaving machine; the combina
member for effecting and controlling the opera
tion of said adjusting and locking means, said tion with a rotatable support for a record to be
shaved; of a cutter mounted for movement to
means including a device which when said cut
ward and from said support; and mechanism
ter is in operative position biases the same to
which is operable to effect the adjustment of the 40
40 wards the record, said actuating member being
adapted by a single manipulation to effect the cutter to and the locking thereof in operative po—
adjustment of said cutter to‘ and the locking sition relative to a record on said support and
which is also operable to effect the unlocking of
thereof in operative position, and means asso
ciated with said actuating member and cutter the cutter and its subsequent retraction from
adapted upon another single manipulation of the operative position, said mechanism including 45
means constantly biasing the cutter toward said
actuating member to effect said operations in
versely and to prevent any forward movement support and means rendered effective in response
to the operation of unlocking the cutter for
of said cutter upon the unlocking thereof.
overcoming such bias thereby to prevent move
12. In a record shaving machine; the combi
ment of the cutter toward said support upon 50
nation
with
a
rotatable
support
for
a
record
to
50
be shaved; of a cutter; and means including an the release of the cutter.
actuating member adapted upon one manipula
CHARLES HUENLICH.
tion to effect the adjustment of said cutter to
HEINRICH F. MAX GRAMANN.
and the locking thereof in operative position
30
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