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Jan.7, 1947.
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w, c; SPEED
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2,413,795
APPARATUS FOR CUTTING QUARTZ OSCILLATOR BLANKS
Filed Nov. 20,1945
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INVENTOR.
l/Vf/?'a/Wr 6‘. J?eed
BY
'
G _. ; -IMMYM
ATTORNEYS
Jan. 7, 1947.
'
w. 0. SPEED’
I
2,413,795 3
APPARATUS FOR CUTTING QUARTZ OSCILLATOR BLANKS
Filed Nov. 20, 1945
.2 Sheets-Sheet 2
IN VEN TOR.
W/W/am C iaeed .
BY
A TTORNE Y5
Patented Jan. 7, 1947
2,413,795
UNITED STATES PATENT OFFICE
APPARATUS‘FOR CUTTING QUARTZ
OSCILLATOR BLANKS.
William C. Speed; New York, 1N.;.Y~l, assignor r-toe
Reeves-Ely vLaboratories, Ina, New'York, N.>Y.,
a corporation of’ New York
Application November 20, 1943,.Serial‘N0.511;.204 /
11 Claims.
1
This invention relates to quartz oscillator plates‘
and has ior'its- object certain‘ improvements in
apparatus for sawing blanks from quartz crystals.
A variety- of types of sawing machines and
sawing techniques have been proposed forthe
making of oscillator plates.
In all cases a de
vice is used to hold the quartz crystal in'proper
orientation for sawing. The crystal is oriented
and then-mounted so it can be fed to the saw or
the saw brought to the crystal. The crystal is,
for example, solidly imbedded in plaster of Paris
or otherwise cemented to a base made of plywood,
(Cl. 125-1491
2.
holder" adapted to engage’ the guide- support- in a
predetermi'nedpo'sition, means associated with
the holder for maintaining the optical andelec
tricalaxes’oi-‘a quartz’crystal mounted thereon
in‘ predetermined ?xed‘ relationship to a reference
part of'theholder, means for placing theguide
support'and hence-the holder andcrystal at 'a
predetermined angleof cut with respect to-the
cutter‘; and'means-for advancing the guide sup
port’, ‘holder andcrystal-as- a unit to thecutter
atsuch'predetermined-angleof out while main
taining‘ the‘ optical and electrical :axes of the
glass, etc. The base is then clamped to the cut
crystal ?xed in their‘predetermined relationship
ting‘ table. A» natural face, or a trued surface, of
to‘ thereferencepart oil the ‘holder.
the crystal is usually used as a base for the
"The invention will be better understood by
mounting; the face or surface being, for exam
reierringto the: accompanying drawings, taken
ple, aligned with the surface of the cutting table;
iniconjunctionewith.the following description, in
The table is then turned to bring the crystal'in
which:.
‘
the desired angle of cut with respect to the saw.‘
Fig. 1 is-a‘side:.elevation,.partly. in section, of
This practicehas a number of serious disad 20 an apparatusillustrative.oi, and adapted for, a
vantages. It isdif?cult to align the crystal ac
practice of the. invention;
curately unless it has a natural'face oi su?icient
;2-.1is a plan-view'oi the same apparatus;
size. Crystal with such natural faces are now the
Fig.3 is~_an:enlargedi side view-0f a portion of
exception rather than-the rule. This is one of
the apparatus, partlyt'in section; and
the reasonswhy the crystals are given-prelimi
Fig. 4 Ban enlarged plan view ofa portion’ of
nary cuts to obtain a trued section with a flat sur
the apparatus.
face that can be used/to positionthe crystal on
Theapparatus shown comprises a sawing ma~
the cutting table. > Special steps must, therefore,
chineltla quartzcrystal holder I I, an adjustable
be taken-to obtain trued sections, and there are
guide. support. I23, anupper carriage l3, and a
nevertheless opportunities for error in mounting '
lower carriage Hi, all of which are suitably
and aligning the crystal to the saw. These diffi
mount'edon a base [5, which is in turn supported
culties are, of course, greatly increased when
byva framework, notshown, to place the car
workingwith raw crystals that do not have any,
riages ~and‘holder at a convenient level for the
or ample, natural faces.
operators of the apparatus.
I have discovered that these disadvantages
Referring‘t'o Fig. 1',,the apparatus shown in
may be substantially overcome. The quartz
cludes a:circular saw it’, mounted on ashaft l1
crystal may be readily and accurately cut into ‘csextendin'g‘through'the free .end of a pull-down
cillator plates. It may be mounted and aligned
arm‘ I'B‘.‘ The‘ pull-‘down arm is pivotally‘ secured
with respect to its axes and may be cut or sawed
to'a‘shaft' i9‘near'its'other end,‘ the shaft being
Without disturbing the alignment. As a result of '40 rotatably'supported‘by‘a‘ pair of spaced vertical
these improvements, substantial economies may
supports 26]. Therear vend‘ of the pull-down arm‘
be effected over the practice heretofore followed
is provided with ~an~adjustable counterweight 2 5.
and oscillator plates of ‘predetermined anglevof
An‘ upright‘arm' 2'2"is- supported on‘ a cross-arm
cut maybe regularly obtained.
extending‘ across the vertical ‘supports. The pull
In accordance with the method of‘ invention,
down armqisrmovably interconnectedto the up
the. optical and electrical axes of a quartz crystal,
right-arm‘ by means of? a pneumatic shock vab
or section of crystal, are placed in predetermined
sorloer2 237 'otlconventional construction. When
relationship with a given reference lineremoved
ther‘saw is 1pulled ldownwardly, by-r‘ pulling down
from .thecrystal. The crystal is then cut at a
the pull-arm,» the casing of‘ the shock absorber
predetermined angle of cut with respect to the 50 .alsolmoves- downwardly away iromla stationary
reference line while maintaining the optical and ‘
electrical axes of the crystal ?xedintheir rela
tionshiprto the‘ reference line.
.
The apparatus. comprises a. cutting machine‘,v
an adjustable guide support, .a removable quartz
pistonl-not shown) secured‘t'o the‘upper endof
thevupri'ghtiarmr Air then‘ rushes into the space
betweenlthe'bpistonhead and‘ the lower part of
the casing; When~=~theisaw~is vreleased, the'coun
'terw‘eight forces iti-upwardlyl into an inoperative
2,413,795
position. The upward action of the pull-down
arm is retarded when the casing of the shock ab
sorber rises around the piston, by permitting the
air in the casing to exit therefrom in regulated
amounts.
Shaft i9 is provided with a pulley 24 which is
extend through base C at opposite sides, and ac‘
commodate bolts 6'! and 68.
Base D consists of a circular bottom disk 80,
preferably of metal, integrally secured to a
smaller circular top disk 8|, preferably made of
?berboard or the like. An outer annular clamp
ing shoulder 82 is provided by the bottom disk
due to the smaller diameter of the top disk. A
pair of clamps 83 and 84 is attachable to base
pulley 21. A drive belt 28 connects the two pul 10 C by bolts 61 and 68, respectively in base C. Each
clamp has a zig-zag con?guration, the outer end
leys so that rotating power may be transmitted
being
provided with a narrow depending shoulder
to the saw.
'
portion adapted to rest on the top of base C and
The particular quartz crystal holder shown is
to pivot thereon. The other end of the clamp
more fully described and claimed in my copend
ing application Serial No. 511,198, ?led November 15 consists of a laterally extending portion adapted
to be pressed downwardly on the top of base
20, 1943. It comprises a series of superposed sup
in turn ?tted with a drive belt 25 connecting a
source of power, not shown. Shaft I9 is also
provided with a pulley 23 and shaft I‘! with a
D when bolts 61 and 68 are tightened.
ports or bases: a ?xed base A, a lower tiltable
Guide support 12 is in turn secured to a base
base B, an upper tiltable base C and a rotatable
Qt located at the bottom of tray 9| which is
base D. Bases D and C are pivotally tiltable at
right angles to each other as well as toward and 20 adapted to catch cutting liquid used on the saw
away from base A. Base D is rotatable laterally
on base C. A quartz crystal 3!) is shown mounted
on base D.
Base A is provided with an inverted guide chan
nel 31 open at both ends, rectangular in cross
when cutting quartz crystals. Base 90 is pro
vided with a pair of bolts 92 and 93 extending
through the guide support and slots 44 and 45 in
base A so that it and the lower ?xed base A of
25 the holder may be suitably secured to one another.
The base and tray are in turn rotatably secured
to an outer hollow shaft 94, the lower end of
which rests slidably on a stationary collar 95.
the holder that de?nes the channel is advanta
An inner solid shaft 96 is secured to the upper
geously used as a reference part to which the
optical axis and an electrical axis of the crystal 30 side of the collar and extends upwardly within
the hollow shaft. The construction is such that
may be suitably adjusted. A pair of spaced pivot
the outer shaft and hence the tray, guide sup
posts 32 and 33 is integrally secured to and cen
port, and the holder may be swiveled around
trally of the base at opposite ends; the upper
the inner shaft. A set screw 91 extends through
ends of the posts being rounded, as shown, so
that base B may be supported and readily tilted 35 the Wall of the outer shaft so that the two shafts
may be locked in any desired position. v The outer
thereon. A pair of spaced bolts 34 and 35 is
surface of the outer shaft is provided with a
integrally secured to base A at diagonal corners,
suitable scale I00 so that the guide support and
the bolts being sufficiently long to extend through
hence
the holder and crystal may be swiveled a
and a convenient distance above base B.
section, and adapted to ?t over guide support 12,
also rectangular in cross-section. The part of
Base B is provided on its underside with a
spaced pair of concave recesses which are adapt
ed to receive and to accommodate the rounded
upper ends of pivot posts 32 and 33 respectively
extending above base A. The opposite sides of
base B have cut-away portions to provide free
working space above bolt
tively in base A. Base B
predetermined amount with respect to the line of
cut of the saw. The movable parts may then be
locked in their adjusted position by the set screw.
Collar 95 is in turn secured to a table IUI on
upper carriage 13 which is slidably interlocked
with a table I02 on lower carriage M. The two
tables are adapted to slide relatively to one an
slots 44 and 45 respec
other among zig-zag surfaces I03. A threaded
is also provided with a
shaft N14 is secured at one end to table HH and
not shown, at diagonal
connects near the other end with collars IE5 to
bolts 34 and 35, with
50 prevent lateral movement thereof and a handle
pair of slotted bolt holes,
corners to accommodate
nuts 46 and 41, respectively in base A. A pair
of spaced pivot posts 48 and 43 is integrally se
cured to and centrally of the base at opposite
sides, the upper ends of the posts being rounded,
I05, the collars being secured to a carriage frame
10?. A similar threaded shaft IE8 is secured at
one end to table H12 and connects at the other
end with collars I09 to prevent lateral movement
as shown, so that base C may be supported and 55 thereof and a handle H0, the collars being be
tilted thereon. These pivot posts are aligned at
ing secured to a carriage frame I l I. In the con—
right angles to pivot posts 32 and 33 of base A.
struction shown, the shafts are at right angles
A pair of spaced bolts 50 and 5| is integrally
to one another and the carriages are therefore
secured to base B at diagonal corners, the bolts
adapted to be moved in right‘ angle relationship
being suf?ciently long to extend through and. a
to one another.
The apparatus may be operated as follows to
convenient distance above base C.
Base C is provided on its underside with a pair
saw oscillator blanks:
Crystal 30 is mounted on the holder with its
of spaced concave recesses which are adapted to
optical axis ?xed in predeterminedrelationship
receive and accommodate the rounded upper
ends of pivot posts 48 and 49 extending above 65 with a given or reference part of the holder, which
in the apparatus shown is the inverted, guide
The diagonal corners are cut away, as
channel 3| in ?xed base A. The optical axis may,
shown, to permit ready access to bolts 34 and 35
for example, be determined and fixed in the man
extending above base B. Base C is also provided
ner disclosed in the copending application of
with a pair of slotted bolt holes, not shown, at
the other diagonal corners to accommodate bolts 70 Harry Berman, Serial No. 511,199, ?led Novem
ber 20, 1943. It is advantageously placed in par
50 and 5| with nuts 64 and 65, respectively, in
allel relationship with the guide channel, for ex
base B. The upper side of base vC is provided
ample, the sides thereof. The electrical axis of
with a circular recess 66 adapted to receive and
the crystal is also ?xed in predetermined rela
accommodate the lower portion of base D. A
spaced pair of threaded bolt holes, notnshown, 75 tionship with a, given or reference part of the
base B.
5
‘ holder,‘which in the-apparatus shown is also guide
channel 3 i. The electrical axis "may, forexample,
be determined and ?xed in the manner disclosed
in the'copending- application‘ of Harry Ber'man,
'Serial No; 511,201, ‘?led November-20, 1943.’ In
practice it is advantageous to ‘place the electrical
axis perpendicular to the top of the guide channel.
6
of outwith"- respect to the "cutter; and'rineans for
"advancing theeguide support, holder 'and crystal
‘as a:-'~unit='to’the ‘cutter at such predetermined
angle? of‘ out while maintaining *the eoptical' ‘and
electrical axes of‘the ‘crystal ?xed in their pre
determined "relati'onship' to the reference" part of
the holder.
'
2. Infapp'aratus iformanufacturing quartz ~os
by ?tting-guide channel‘ 3| in ‘base A over ad
cillator'platesfthe improvement comprising a cut
justable guide support I2.- ln'other Words; the 10 ter, a'guideisupport, a removable'quartz‘crystal
guide‘ support will then ?t in the 'guide channel
l'holder- adapted’ to engage ‘the guide support‘ in
fa-irlysnugly so that the’two may function‘ in
a predetermined ipositiony-said holder compris
effect as a reference line or partforthe cutting
ing-a ?xedlbase’ provided with at "least two pivot
operation. Bolts $2 and 93 in slots 44 and 45
posts, a lower tiltableibase-supported; by'~- said
' The holder is secured to the sawing-apparatus
of base A are then tightened so that the holder 15 pivot-posts; ithellower tiltable‘base also being
is “rigidly secured to the guide'support. In the
present construction the guide support is dis
posed horizontally. This leaves the optical axis
of the crystal in horizontal relationship and the
provided ‘with at'least‘ two pivot posts; said ‘two
sets of pivot posts beingaligne'd' atright-angles
electrical axis in vertical relationshipthereto. -
supported'by the'upper tiltable base, said tiltable
bases-‘being 'tiltable with respect to ‘each ‘other
and said ?xe'dba'se; means" associated with ‘the
holder'for maintaining ‘the optical and‘electrical
Saw~|ii is placed in perpendicular relationship
to the guide support and therefore also guide
channel3l.
to each‘ other, an upper tiltable" base supported
by the latter pivot‘ posts, and a ‘rotatable base
axes of 'a quartz crystal-mounted thereon in pre-.
Since the optical and electrical axes of the cry.“
tal and the line of cut of the saw are placed in 25 determined‘ ?xed relationship‘ to areference part
this predetermined relationship, any-desired angle
of cut may be obtained by swiveling adjustable
guide support [2, This is accomplished by loos
eningset screw 97 and suitably swiveling the hold
of the holder, ‘means ‘for placing'the guide sup
port andvhence theho'lder and crystal at a pre
determined angle of ‘cut with ‘respect to the ‘cutter,
and means for advancing the guide support,
er and'outer hollow shaft 95, about ?xed solid 30 holder and crystal as a'unit to the cutter at such
predetermined'angle 'of out" while -maintaining
shaft 95 until the predetermined angle‘ of cut
the optical and'ele'ctri'cal axes of the crystal'?xed
H2 is obtained. This is visually indicated on
in their predetermined relationship to the refer
scale "38. Set screw d? is then tightened to ?x
the parts in their adjusted position.
ence‘ part of the’ holder.
With the optical and electrical axes of the crystal 35
?xed in predetermined relationship with saw IS;
the crystal may be moved to a suitable position
under the saw by suitably turning handle we
of carriage l3 and handle I i ii of carriage l4. Pull
down arm iBis then lowered to bring the saw in
contact with the crystal. Power is applied to
belts 25 and 28, and the saw rotates about its
shaft i1. One blank after another may then
be cut from the crystal, the thickness of the blanks
3. In apparatus‘ for manufacturing quartz os
cillator plates, the: improvement ‘comprising a
cutter, a guide'support, a'remio-vable quartz ‘crystal
holder adapted to ‘engage vthe g'u'ide'support in
a ’ predetermined position; said holder ‘comprising
a ?xed ‘base, va lowerlitiltable base 'piifotally‘ sup-
ported by ‘the'?xed base, an‘upper 'tiltable base
‘pivotally'supported by the lower'tiltable base,
and a rotatable base ‘supported by the upper tilt
able baseptheftiltable bases being tiltable with
being regulated by the amount carriages i3 and 45 respect to‘each other» andfthe?xed ‘base; means
14 are moved by handles 5% and HG. It will be
associ‘ated'with the holder for maintaining the
clear that the reference line or part may be
optical and electrical axes of a quartz crystal
mounted'thereon in‘pre'determined ?xed relation
Varied. For example, the various elements go
ing into the apparatus may be so constructed
ship to areference "part ‘of the holder, means
for p-lacingl'i'thei guicle‘support and hence the
that an edge or a face or even a line, as shown,
holder vand f‘crystal at apred'etermined angle of
through the center of the top of adjustable guide
support l2, etc., or an edge or a face of guide
cut with‘ respect ‘td'thei-cutter, said-"means for
placing the guide support comprising a rotatable
portant thing is to select a suitable reference line
base supporting the guide‘isupport, means asso
or part and then to operate ‘the apparatus with 55 ciated with the latter rotatable base for deter
respect to that reference line or part in order to
mining the amount of rotation thereof with re
obtain the advantages of the invention.
spect to the cutter, and means for advancing
I claim:
the guide support, holder andcrystal as a unit to
the cutter at such predetermined angle of cut
1. In apparatus for manufacturing quartz os
cillator plates, the improvement comprising a cut 60 while maintaining the optical and electrical axes
of the crystal ?xed in their predetermined rela
ter, a guide support, a removable quartz crystal
tionship to the reference part of the holder.
holder adapted to engage the guide support in a
predetermined position; said holder comprising a
4. In apparatus for manufacturing quartz os
cillator plates, the improvement comprising a
?xed base, a lower tiltable base pivotally support
ed‘ by the ?xed base, an upper tiltable base piv 65 cutter, a‘g'uidesup‘port, a removableiquartz crystal
otally supported by the lower tiltable base, and
holder? adapted to engage the guide support in
a rotatable base supported by the upper tiltable
a predetermined ‘position ; said holder comprising
base, the tiltable bases being tiltable with respect
a ?xed base, a lower tiltable base pivotally sup
to each other and the ?xed base; means associ
ported by the ?xed‘ base, an upper tiltable base
ated with the holder for maintaining the optical 70 vpivot'allysupported by the lower tiltable base, and
and electrical axes of a quartz crystal mounted
a rotatable base supported by the upper til-table
thereon in predetermined ?xed relationship to a
base, the=ti~ltab1e bases being tiltable with respect
reference part of the holder, a swivelly adjustable
to each other and the; ?xed ‘base; means "associ
mounting for placingthe guide support and hence
*ated with ‘the ‘holder for maintaining the’o'ptical
the ‘holder-‘and crystal at a predetermined'angle 75 and"? 'electricalaxes (if a‘; quartz crystal -' mounted
channel 23, etc., may be employed.
The im
2,413,795
7
thereon in predetermined ?xed relationship to a
reference part of the holder, means for placing
the guide support and hence the holder and
crystal at a predetermined angle of cut with re
spect to the cutter, and means for advancing
8
base supported by the upper tiltable'base, and
means connecting the upper tiltable base and the
rotatable base for locking the two bases when the
rotatable base is adjusted to a desired position;
GI
the guide support, holder and crystal as a unit
to the cutter at such predetermined angle of out
while maintaining the optical and electrical .axes
of the crystal ?xed in their predetermined rela
tionship to the reference part of the holder, said
latter means comprising an upper carriage sup
porting the guide support and being movable lat
erally at right angles to the cutter, and a lower
carriage supporting the upper carriage, the lower
carriage being movable laterally in a direction
generally parallel to the cutter and at right angles
to the direction of travel of the upper carriage.
5. In apparatus for manufacturing quartz os“
cillator plates, the improvement comprising a
cutter, a guide support, a removable quartz crystal
holder adapted to engage the guide support in
a predetermined position; said holder compris
ing a ?xed base, a lower tiltable base pivotally
supported by the ?xed base, an upper tiltable base
pivotally supported by the lower tiltable base, H
and a rotatable base supported by theupper tilt
able base, the tiltable bases being tiltable with
respect to each other and the ?xed base; means
associated with the holder for maintaining the op
tical and electrical axes of a quartz crystal
mounted thereon in predetermined ?xed rela
‘ tionship to a reference part of the holder, means
a swivelly adjustable mounting for placing the
guide support and hence the holder and crystal
at a predetermined angle of cut with respect to
the cutter, and means for advancing the guide
support, holder and crystal as a unit to the cutter
at such predetermined angle of cut.
7. In apparatus for manufacturing quartz os_~
cillator plates, the improvement comprising a
cutter, an adjustable guide support, a removable
quartz crystal holder adapted to engage the guide
support in a predetermined position; said holder
comprising a ?xed base, a lower tiltable base piv
otally supported by the ?xed base, the lower tilt
able base being tiltable with respect to the ?xed
base about a straight line axis'at a ?xed distance
from the ?xed base, means connecting the ?xed
base and the lower tiltable base for locking the
two bases when the lower tiltable base is adjusted
to a desired position, an upper tiltable base piv
otally supported by the lower tiltable base, the
upper tiltable base being tiltable with respect to
the lower tiltable base and the ?xed base about
a straight line axis in perpendicular relationship
to the other straight line axis and, a~ ?xed distance
from the lower tiltable base, means connecting
the lower tiltable base and the upper tiltable base
for locking the two bases when the upper tiltable
base is adjusted to a desired position, a rotatable
base supported by the upper tiltable base, and
for placing the guide support and hence the
means connecting the upper tiltable base and
holder and crystal at a. predetermined angle of
cut with respect to the cutter, said means for 35 the rotatable base for locking the two bases when
the rotatable base is adjusted to a desired posi
placing the guide support comprising a rotatable
tion; a swivelly adjustable mounting for placing
base supporting the guide support, means asso
the guide support and hence the holder and crys
ciated with the latter rotatable base for deter
tal at a predetermined angle of cut with respect
mining the amount of rotation thereof with re
spect to the cutter, and means for advancing the 40 to the cutter, and means for advancing the guide
guide support, holder and crystal as a unit to
support, holder and crystal as a unit to the cutter
the cutter at such predetermined angle of out
at such predetermined angle of out.
while maintaining the optical and electrical axes
8. In apparatus for manufacturing quartz os
of the crystal ?xed in their predetermined rela
cillator plates, the improvement comprising a
tionship to the reference part of the holder, said
cutter, an adjustable guide support, a removable
latter means comprising an upper carriage sup
quartz crystal holder adapted to engage the guide
porting the guide support and being movable
support in a predetermined position; said holder
laterally at right angles to the cutter, and a
comprising a ?xed base, a lower tiltable base
lower carriage supporting the upper carriage,
pivotally supported by the fixed base, the lower
the lower carriage being movable laterally in a
tiltable base being tiltable with respect to the
direction generally parallel to the cutter and at
right angles to the direction of travel of the
upper carriage.
6. In apparatus for manufacturing quartz os
cilla-tor plates, the improvement comprising a ,
cutter, an adjustable guide support, a removable
quartz crystal holder adapted to engage the guide
support in a predetermined position; said holder
comprising a ?xed base, a lower tiltable base
?xed base about a straight line axis at a ?xed dis
tance from the ?xed base, means connecting the
?xed base and the lower tiltable base for locking
the two bases when the lower tiltable base is ad
justed to a desired position, an upper tiltable base
pivotally supported by the lower tiltable base, the
upper tiltable base being tiltable with respect to
the lower tiltable base and the ?xed base about
a straight line axis in angular relationship to
pivotally supported by the ?xed base, the lower 60 the other straight line axis and a ?xed distance
from the lower tiltable base, means connecting
tiltable base being tiltable with respect to the
the lower tiltable base and the upper tiltable base
?xed base abouta straight line axis at a ?xed dis
for locking the two tiltable bases when the upper
tance from the ?xed base, means connecting the
tiltable base is adjusted to a desired position, a ro
?xed base and the lower tiltable base for-locking
the two bases when the lower tiltable base is ad 65 tatable base supported by the upper tiltable base,
and means connecting the upper tiltable base and
justed to a desired position, an upper tiltable base
the rotatable base for locking the two bases when
pivotally supported by the lower tiltable base, the
the rotatable base is adjusted to a desired posi
upper tiltable base being tiltable with respect to
tion; means for placing the guide support and
the lower tiltable base and the ?xed base about
a straight line axis in angular relationship to the ".70 hence the holder and crystal at a predetermined
angle of cut with respect to the cutter, and means
other straight line axis and a ?xed distance from
for bringing the guide support, holder and crys
the lower tiltable base, means connecting the lower
tal as a unit and the cutter into cutting position
tiltable base and the upper tiltable base for lock
at such predetermined angle'of cut.
ing the two tiltable bases when the upper tiltable
In apparatus for manufacturing quartz os- '
base is adjusted to a desired position, a rotatable 75
2,413,795
cillator plates, the improvement comprising a
cutter, an adjustable guide support, a removable
quartz crystal holder adapted to engage the guide
support in a predetermined position; said holder
comprising a ?xed base, a lower tiltable base piv
otally supported by the ?xed base, the lower tilt
able base being tiltable with respect to the ?xed
10
from the lower tiltable base, means connecting
the lower tiltable base and the upper tiltable base
for locking the two bases when the upper tiltable
base is adjusted to a desired position, a rotatable
base supported by the upper tiltable base, and
means connecting the upper tiltable base and the
rotatable base» for locking the two bases when the
base about a straight line axis at a ?xed distance
rotatable base is adjusted to a desired position;
from the ?xed base, means connecting the ?xed
means for placing the guide support and hence
base and the lower tiltable base for locking the 10 the holder and crystal at a predetermined angle
two bases when the lower tiltable base is adjusted
of cut with respect to the cutter, and means for
to a desired position, an upper tiltable base piv
advancing the guide support, holder and crystal
otally supported by the lower tiltable base, the
upper tiltable base being tiltable with respect to
the lower tiltable base and the ?xed base about a
straight line axis in perpendicular relationship
to the other straight line axis and a ?xed distance
from the lower tiltable base, means connecting
the lower tiltable base and the upper tiltable base
for locking the two bases when the upper tilt
able base is adjusted to a. desired position, a ro
tatable base supported by the upper tiltable base,
and means connecting the upper tiltable base and
the rotatable base for locking the two bases when
the rotatable base is adjusted to a desired posi
tion; means for placing the guide support and
as a unit to the cutter at such predetermined
angle of out.
11. In apparatus for manufacturing quartz os
cillator plates, the improvement comprising a
cutter, an adjustable guide support, a removable
quartz crystal holder adapted to engage the guide
support in a predetermined position; said holder
comprising a ?xed base, a lower tiltable base piv
otally supported on pivoting means secured to the
?xed base, the lower tiltable base being tiltable
with respect to the ?xed base about a straight
line axis at a ?xed distance from the ?xed base,
means connecting the ?xed base and the lower
tiltable base for locking the two bases when the
lower tiltable base is adjusted to a desired posi
tion, an upper tiltable base pivotally supported on
pivoting means secured to the lower tiltable base,
hence the holder and crystal at a predetermined
angle of cut with respect to the cutter, and
means for bringing the guide support, holder and
crystal as a unit and the cutter into cutting posi 30 the upper tiltable base being tiltable with respect
tion at suchjpredetermined angle of out.
to the lower tiltable base and the ?xed base about
10. In apparatus for manufacturing quartz os
a straight line axis in perpendicular relationship
cillator plates, the improvement comprising a
to the other straight line axis and a ?xed dis
cutter, an adjustable guide support, a removable
tance from the lower tiltable base, means con
quartz crystal holder adapted to engage the guide
necting the lower tiltable base and the upper
support in a predetermined position; said holder
tiltable base for locking the two bases when the
upper tiltable base is adjusted to a desired posi
comprising a ?xed base, a lower tiltable base piv
otally supported on pivoting means secured to the
tion, a rotatable base supported by the upper
?xed base, the lower tiltable base being tiltable
tiltable base, and means connecting the upper
with respect to the ?xed base about a straight 40 tiltable base and the rotatable base for locking
line axis at a ?xed distance from the ?xed base,
the two bases when the rotatable base is adjusted
means connecting the ?xed base and the lower
to a desired position; means for placing the guide
tiltable base for locking the two bases when the
support and hence the holder and crystal at a
predetermined angle of cut with respect to the
lower tiltable base is adjusted to a desired posi
tion, an upper tiltable base pivotally supported onv
cutter, and means for bringing the guide support,
pivoting means secured to the lower tiltable base,
holder and crystal as a unit and the cutter
the upper tiltable base being tiltable with respect
into cutting position at such predetermined angle
of cut,
to the lower tiltable base and the ?xed base about
a straight line axis in perpendicular relationship
WILLIAM C. SPEED.
to the other straight line axis and a ?xed distance 50
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