US2387083A

US2387083A - Article assembling fixture

Info

Publication number: US2387083A
Application number: US520794A
Authority: US
Inventors: Cecil C Mccain
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1944-02-02
Filing date: 1944-02-02
Publication date: 1945-10-16
Anticipated expiration: 1962-10-16

Description

Oct. 16, 1945. C A

' ARTICLE ASSEMBLING FIXTURE Filed Feb. 2, 1 944 2 sh ets-sheet 1 /M [A/MR C. G. MCCAIN ,Ak/x. 720mm Oct. 16, 1945. c. c. MOCNN 2,387,083

I ARTICLE ASSEMBLING FIXTURE I w I Filed Feb. 2, 1944 2 Sheets-Sheet 2 40 WHHK A m/i/[N'mk CiCMQC'A/A. By /C- Patented Oct. 16, 1945 ARTICLE ASSEMBLING FIXTURE Cecil C. McCain, Glen Ellyn, 111., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application February 2, 1944; Serial N0.'520,794

13 Claims.

This invention relates to article assembling fixtures and more particularly to a fixture for assembling quartz crystal mounting wires on their respective supporting terminal posts.

In the manufacture of certain types of quartz crystals for use as frequency control. devices in electronic apparatus, it is sometimes the practice to support the quartz crystal between a pair of lead; wires. It is important that the lead wires be accurately aligned with respect to each other and with respect to. the terminal posts on which they are mounted.

It is an object of the present invention to provide an efficient and efiective fixture for assembling quartz crystal mounting wires on terminal p ts.

In. accordance with one embodiment of this invention, a fixture for assembling quartz crystal mounting wires on supporting terminal posts mounted in a crystal housing base block is provided comprising a pivotal support for the base block and a plate associated with the support and suitably recessed to receive the upper portions of the mounting wires. The terminal posts, with the wires loosely assembled thereon, are placed on the pivotal support, which is then pivoted to position the upper portions of the mounting wires in the recesses in the plate. Slidable retaining members are mounted on this plate to clamp the wires in the recesses during the soldering operation.

Other objects and advantages of this invention will. be more apparent from the following detailed description taken in conjunction with the drawings, wherein Fig. 1 is a front elevation of a fixture constructed in accordance with this invention;

Fig. 2 is a detail sectional view along the line 2--2 of Fig. 1;

Fig. 3 is a vertical sectional view along the line- 33 of Fig. 1;

Fig. 4 is a sectional view similar to'FigLS, eX-

extendtransversely through the base block and are substantially parallel to each other, being positioned in opposite end portions thereof, as shown. On. each of these terminal posts,- as shown in these figures, is positioned a mounting wire l2 comprising a helical lower portion 13, a substantially straight mid-portion l4 and a helical upper portion l5 which is coiled in a plane at right angles to the plane of the lower portion #3. The purpose of the present invention is to provide a fixture by which. these mounting wires may be accurately aligned with and positioned on their respective terminal posts.

Referring to Fig. 1, it will be seen. that this fixture comprises a rectangular frame It, the central portion of which is provided with a rectangular aperture H. A flat plate 20 of slightly less width than the aperture 1-! is pivotally mounted in the lower portion of the aperture H on a ro tatable shaft 2! which extends horizontally across the lower portion of the frame. It A pair oi vertically extending apertures 22 are formed in the upper portion of. the plate 29 and spaced apartthe same distance the terminal posts H are spaced. apart on the base block I0. These apertures are of suitable size. to receive the lower portions of the terminal posts It and a pair of springs 23 are mounted on a side of the plate 20 so that their upper portions will extend through a pair of slots 25 formed on the same-side of the plate 20 to permit the upper portions of the springs 23 to bear against the terminal posts it when inserted in the apertures 22 and, thus, toretain the terminal posts and .base block in. position. on the plate 20-.

When assembling the base block ID on the plate 20, the plate 20 is pivoted forwardly to the position shown in Fig. 4 to facilitate insertion of the terminal posts in the apertures 2-2. A small block 25 is mounted on one sideof the frame It to predeterminetheposition to which the plate may be pivoted while a spherical member 26 is mounted in an aperture 21 formed in the inner side of the frame l6 and is urged against the adjacent side of the plate when the plate is pivoted into the assembly position after the base block it has been placed thereon. A spring 30, mounted in the rear portion of the aperture 21, urges thes-pherical member 26 forward and. a small recess 3! is formed in the side of the plate 28 to receive the forward portionot the spherical member 26. A stop member 32, mount.- ed on the opposite side of the frame from the stop member 25', prevents the plate from being pivoted rearward-1y past the spherical member 26 When the plate 20 is in the position in which it is held by the spherical member 26, the upper portions l of the mounting wires II! will rest against a downwardly extending, integrally formed portion 33 of the frame 16. The lower end of this downwardly extending portion is provided with a pair of circular recesses 34 in which the coiled upper portions [5 of the mounting wires may be received and by which the mounting wires may be accurately positioned with respect to the. terminal posts H. A short slot extends downwardly at a tangent to the circular recesses 34 to receive the straight portions l4 of'the mounting wires.

After the upper portions of the mounting wires have been assembled in the recesses 34, a pair of retaining fingers 3B,which are slidably mounted on the frame I6 and the lower portions of which bear against the downwardly extending portion 33 of the frame, are moved downwardly to clamp' the coiled portions of the mounting wires in the recesses 34. The integrally formed portion 33 of the frame I6 has an upwardly extending integral portion 49, as maybe clearly seen in the drawings, and the upper portions of the fingers 36 extend thereover; A retaining: plate 4| is attached to theportions 33 and 4c of the frame l6 and holds the fingers 36, which are of rectangular cross section, in vertically extending grooves 42 formed in the

portions

33 and 40 of the frame I6; "A- pair of springs 43, similarj to the springs 23, mounted onthe plateZB, are mounted on the retaining plate 4| and extend through slots 44 formed in the lowerportion thereof so as to bear against the upper sides of the fingers 36 and urge the fingers against the portion 33. These fingers are "provided with notches 45 in which the ends of the springs 43 are receivable so that, when the fingers are moved downward to clamp the upper portionsof the mounting wires inthe circular recesses 34, the fingers will not accidentally move away. A pair of lugs 46 are mounted atright angles to the'upper ends of the fingers 36 and extend through slots 41 formed in the upperportion of the retaining plate. These lugs facilitate moving'the fingers upward or downward.

After the mounting wires have been clamped in the;circular recesses 34 by moving the fingers 36 downward, solder is applied to the lower portions 13 of the mounting wires, which are coiled about the upper ends of theterminal posts II to rigidlyattach the mounting wires thereto.. The fingers 36 are then moved upward and the plate pivoted outwardly to permit removal of the block Ill and associated parts, a knurled knob 50 being attached to one end of the shaft 2lto facilit'ate rotation thereof. Y

While but one embodiment of this invention has been shown and described, it will be understood that many changes and modifications may be made therein without departing from the spirit or scope of the present invention.

' What is claimedis': 1 I

"1. A fixture for; assembling amounting wire on a te'rminalpost comprising a pivotal support 2. A fixture for assembling a mounting wire on a terminal post comprising a pivotal support for the terminal post, means for retaining the post on the support, means positioned adjacent said pivotal support and having a recess formed therein for receiving an offset portion of said mounting wire to position said offset portion of said mounting wire in a predetermined relation to said terminal post, said pivotal support being movable to carry the offset portion of the mounting wire into the recess of said positioning means and means movable relatively to said positioning means for clamping said mounting wire on said positioning means.

3. A fixture for assembling a mounting wire on a terminal post comprising a plate having an aperture formed therein to receive a portion of said post, resilient means associated with said plate for retaining said post in said aperture, means positioned adjacent said plate and having a recess formed therein to receive an ofiset portion of said mounting wire to position the offset portion of said mounting wire in a predetermined relation to said terminal post, and means for retaining said ofifset portion of said-mounting wire in said recess in said positioning means. 4. A fixture for assembling a mounting wire on a terminal post comprising a plate having anaperture formed therein to receive a portion of said post, resilient means associated with said plate for retaining said post in said aperture,

said plate being slotted adjacent said aperture to permit a portion of said resilient means to bear against said post, means positioned adjacent said plate and having a recess formed therein to re-' ceive a portion of said mounting wire, and means.

for holding said portion of said mounting wire in said recess,

5. A fixture for assembling a mounting wire on r a terminal post comprising a pivotal support forthe terminal post, means for retaining the post on the support, means adjacent said support for receiving a coiled end portion of said mounting wire to position said coiled end portion of said mounting wire in a predeterminedrelation to said terminal post, said pivotal support being movable to carry the coiled end portion of the mounting wire to the positioning means and means for clamping said coiled end portion of said mounting Wire on said positioning jacent said support.

6. A fixture for assembling a mountingwire on a terminal post comprising a support for the" terminal post, means adjacent said support having a recess formed therein to receive a coiledend' portion of said mounting wire to position said coiled end of said mounting wire in a predetermined relation to said terminal post, and a 'finger slidably mounted on said means and movable to retain a portion of said mounting wire in said recess. 1

7. A fixture for assembling a mounting wire on a terminal post comprising a support for the terminal post, means adjacent said support having a .recess formed therein to receive a coiled end por- 8. A fixture for assembling a. mounting wire on a terminal post comprising a plate having an aperture formed therein to receive a portion of means ad- 7 said post, resilient means associated with said plate for retaining said post in said aperture, means adjacent said plate having a recess formed therein to receive a portion of said mounting wire, a finger slidably mounted on said latter means and movable to clamp a portion of said mounting wire in said recess, and resilient means associated with said slidable finger for preventing accidental shifting thereof.

9. A fixture for assembling a mounting wire on a terminal post comprising a plate having an aperture formed therein to receive a portion of said post, means adjacent said plate having a recess formed therein to receive a coiled end portion of said mounting wire to position said coiled end of said mounting wire in a predetermined relation to said terminal post, and a finger slidably mounted on said means and movable to clamp a portion of said mounting wire in said recess.

10. A fixture for assembling a mounting wire on a terminal post comprising a pivotally mounted plate having an aperture formed therein to receive a portion of said post, resilient means associated with said plate for retaining said post in said aperture, means adjacent said plate and on a terminal post comprising a plate having an aperture formed therein to receive a portion of said post, means adjacent said plate having a recess formed therein to receive a portion of said mounting wire, a finger slidably mounted on said latter means and movable to clamp a portion of said mounting Wire in said recess, and resilient means associated with said slidable finger for preventing accidental shifting thereof.

12. A fixture for assembling a mounting wire on a terminal post comprising a pivotally mounted plate having an aperture formed therein to receive a portion of said post, means adjacent said plate having a recess formed therein to receive and position an offset portion of said mounting wire in a predetermined relation to said terminal post, and means for clamping the offset portion of said mounting wire on said positioning means.

13. A fixture for assembling mounting wires on terminal posts of a device comprising a pivotal support having a plurality of apertures therein to receive a portion of the posts of said device, means positioned adjacent said pivotal support and having a plurality of recesses for receiving having a recess formed therein to receive a porand positioning the coiled ends of said mounting wires in a predetermined relation to each other and to said posts, and means for retaining said coiled ends of said wires on said positioning means while said mounting wires are fixed to said posts.

CECIL C. McCAIN.