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Патент USA US2408769

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Oct. 8, 1946.
J. E. FOX ETAL
' 2,408,763
QUARTZ. CRYSTAL HOLDER
Filed June 5, 1944
3 Sheets-Sheet 1
IN VEN TOR.
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Oct. 8, 1946-
2,408,768
J. E. FOX ET AL
QUARTZ CRYSTAL HOLDER
Filed June 5, 1944
5 Sheets-Sheet 2
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BY
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Oct. 8, 1946.
J_ 5, FOX ETAL
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2,408,768
QUARTZ CRYSTAL HOLDER
Filed June 5, 1944
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INVENTOR.
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BY
‘ M1 a Qu/A/CK JE.
2,408,768
Patented ‘Oct. 8, 1946
UNITED STATES. PATENT OFFICE
2,408,768v
QUARTZ CRYSTAL ' HOLDER; .
Joseph E. Fox, Neil‘ A. Nelson, and .William S.
Quincy, Jr., Dayton, Ohio"
Application June 5-, 19%,Serial'N0. 538,798 -_
4 Claims. (01. 171-327)‘
(Granted under the act of March 3,1883; as
amended‘April 30, 1928; 370 0; G. 757)
1
ilar material. by any suitable attaching’means
The invention described herein may the manu
factured. and used by or for theGovcrnment for
such as screws 3. Preferably, internally threaded.v
sleeves'd embeddedin 2, receive screws 3 topro
governmental purposes, without the paymentto.
us of any royalty thereon.
The invention to be hereinafter described re
vide a more positive and'secure connection;
CA
lates to crystal holders of the plug-in type for
Base‘ l carries spaced substantially parallel,
upwardly extending spring-plate or, spring-leaf
contact 5, each having an upper inwardly in.-'
clined or directed ?ange. B- and a lower inwardly’
In use in radio operation frequent changes of.
directed approximately perpendicular ?ange 1.
crystals are essential, as when the frequency of
a transmitter is shifted, for instance. Repair, 10 Between these contacts 5, as willibe well under
stood, is disposed the quartz; crystal assembly
renewal and many other causes make ready
comprising the thin plate 8 of quartz: crystal
change an important consideration. To meet
radio operation.
mounted between steel plate electrodesll;
such requirements, crystal holders in plug-in
3 and 6, the crystalis spaced from the elec
trodes ll'throughout most of :its surface- The
electrodes and crystals are of approximately the
The rapidly spreadinguseof radio equipment
to~many ?eldsincludes practically all forms of ’
transportation many of which involve high and
frequent vibration’ and. frequent or even constant
exposure to dirt; dust, moisture and otherJdam
aging elements or conditions seriously affecting.‘
the operation. Penetration of moisture, for in
stance, may readily becorne'fatal to the opera
tion. Due to the wide-spread'use of such holders
it is important to havethem 1 of standardized; economical construction capable of low-cost mass
production.
The present invention has been developed to
meet the above and other requirements while at
the same time eliminating the objections men
tioned and producing a simple, practicable, du
rable and low-cost holder of the type stated.
In order to more clearly disclose the construc
tion, operation and use of the invention refer
ence should be had to the accompanying draw
ings forming part of the present application.
Throughout the several ?gures of the draw
ings, like reference characters designate the
same parts in the different views.
In the drawings:
Fig. 1 is a front elevation of the invention;
Fig. 2 is a cross section on line 2—2 of Fig. 1,
showing the spring in elevation;
Fig. 3 is a cross section on line 3—3 of Fig. .2;
Fig. 4 is a side elevation of the spring contacts
and their mounting;
Fig. 5 is a top plan View of Fig. 4; and
Fig. 6 is an edge view of an electrode plate,
the height of the raised portions being greatly
exaggerated for clearness.
Referring to the drawings in detail, I indi
cates a base of any suitable material such as
plastic, in which are mounted in well known
manner, the usual plug-in terminals. This base
may be secured to a box-like housing 2 of sim
As
will be noted on careful examination of Fig-s2;
form have been developed, facilitating such:raD—'
id substitution.
same area and the same dimensions except as
to thickness. The corners It] of the. electrodes
are slightly above the general surface. This
raised portion is shown greatly magni?ed 'oriex
aggerated, in edge view, in Fig- 6.‘ lnnasseme
bling, the two electrode plates are disposed with
their ‘raised corners» It facing ‘each other. and the
25
quartz crystal betweenthem, resting» on raised
portions- l0 and ‘spaced from electrodes 9 ‘pro
viding the necessary freedom for vibration. This
sandwich assembly is placedin a vplastic frame or
chase= l l ‘in. the form of a hollow square or rec
tangle: and that, in turn: isplacedbetween'the
contact plates 5 ‘and betweentheo?anges v6. and.
1 thereof. In order to de?nitely maintain close
operative assembled relations of the electrodes
and crystal and de?nite continuous electrical
contact and, at the same time, maintain the
desired pressure on the quartz crystal, a coil
spring 12 is interposed between one electrode 9
and the adjacent spring plate contact 5.
On reference to Fig. 3 it will be noted that
the chase interior dimensions are slightly greater
than the corresponding dimensions of the elec
trodes 9 received therein. In the four corners of
the frame are formed shoulders II’ which seat
the corresponding electrode plate corners. This
mounting gives adequate spacing between the
edges of the assembled electrodes and quartz
crystal and adjacent sides of frame or chase H,
thereby providing greater freedom of vibration
and correspondingly increased eiliciency. With
such an arrangement, the crystal is suspended
between the two electrodes by its four corners
only and the entire assembled sandwich is free
from contact with the enclosing chase or frame
H except at the spacing shoulders II’ at the
frame corners.
3
2,408,768
4
Assume that the crystal and electrodes have
?anges thereof, a spring adapted to be com~
been assembled in chase ll, chase II placed be
pressed
between one of said contact plates and
tween spring contacts 5 and between ?anges 6
the adjacent electrode plate, a moistureproof
and 1 thereof, and that coil spring [2 has been
seated in place between 5 and 9. Next, housing Cl housing adapted to slip over and receive said con
tact plates and chase and to maintain compres
2 will be slipped down over that assembly, as an
sion of said spring, and means for securing said
envelope. The inward taper of the upper ?anges
base and housing in moi'stureproof assembled re
6 assists in guiding the housing 2 to ?nal position,
lation.
coil spring l2, being appreciably compressed as
2. A crystal holder comprising a base provided
the housing is forced home. Immediately prior 10
with terminal contacts, contact plates carried by
to putting housing 2 in place, a suitable gasket
said. base and connected with said terminal con
I3 is slipped over the contact plates and onto
taots, said plates being provided with supporting
base I in position to be clamped between base
?anges, a chase disposed between said contact
I and housing 2. Now, when the housing 2 is
forced home, it clamps the gasket l3 against base 15 plates and mounted on said‘supporting ?anges.
I.
Then screws 3 are turned in and the parts
metal electrode plates and a quartz crystal their ~
between mounted in said chase, a housing adapt~
ed to slip over and receive said contact plates and
chase, means carried by
aforesaid contact
A crystal holder constructed and assembled in
plates engaging and guiding said housing to 012-.
accordance with this invention completely on
erative position and means for securing said base
closes all fragile parts in a container thoroughly
and housing in assembled relation.
sealed against moisture, dust and all other in
3. A crystal holder comprising a base provid
jurious media. The same construction and as~
ed with terminal contacts, contact plates carried
sembly provides a ?rm anti-vibration and jolt
by said base and connected with said terminal
or shockproof holder, proof against damage by
25 contacts, said plates being provided with sup~
continued severe vibration and shock when used
porting ?anges and housing guiding ?anges, a
on various types of military vehicles under the
chase disposed between said contact plates and
roughest and most destructive conditions.
between
said supporting ?anges and said guiding
It is believed that the construction, operation
?anges thereof and mounted on said supporting
and use of the invention will be Clear from the
30 ?anges, metal electrode plates and a quartz crys~
preceding description.
tal thcrebetween mounted in said chase, and a
Many changes may be made in the construc
housing adapted to slip over and receive said
tion, arrangement and disposition of various
contact plates and chase and means for securing
parts of the invention and in the materials used,
said base and housing in assembled relation.
within the scope of the appended claims without
4. A crystal holder comprising a base provid-v
departing from the ?eld of the invention and
ed
with terminal contacts, contact plates car
it is meant to include all such within this appli~
ried by said base and connected with said ter
cation, wherein only one preferred construction
minal contacts, said plates being provided with
and arrangement has been disclosed by Way of
illustration and with no thought or intention of
a.supporting
chase disposed
?angesbetween
and housing
said contact
guiding
plates and
limiting the application thereby, and it is intend 40
between
said
supporting?anges
and
said guid
ed to include all such within this application.
ing ?anges thereof and mounted on said support
Having thus described our invention, what we
ing ?anges, a quartz crystal mounted
said
claim and desire to protect by Letters Patent is:
chase,
a
housing
adapted
to
slip
over
and
receive
'1. A crystal holder comprising a base provided
with plug-in terminals, contact plates carried by 45 said
curing
contact
said base
plates
andand
housing
chase in
andassembled
means forrela
said base and connected with said terminals, said
tion.
plates having inwardly and upwardly inclined
JOSEPH E. FOX.
?anges and lower inwardly and perpendicularly
NEIL A. NELSON.
directed ?anges, a chase adapted to be mounted
WILLIAM S. QUINCY, J11.
between said contact plates and between the
drawn tightly together, gasket l3 making a mois
turetight and dustproof seal between the parts.
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