US2364689A

US2364689A - Assembling apparatus

Info

Publication number: US2364689A
Application number: US486243A
Authority: US
Inventors: Robert E Brooks
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1943-05-08
Filing date: 1943-05-08
Publication date: 1944-12-12
Anticipated expiration: 1961-12-12

Description

Patented Dec. 12, 1944 AS-SEMBLING APPARATUS Robert Brooks, Maywood, 111., asslgnor to Western Electric Company, Incorporated, New

Yorl r', N. Y., a corporation of New York Application May"8, 1943, Serial No. 486,243

(opus-99) Claims.

This invention relates to assembling apparatus and particularly to apparatus combining means for assembling, locating and supporting parts relative to each other for attachment.

This invention is particularly applicable to the assembling, locating and Supporting of sub-assemblages comprising piezoelectric crystals and their mountings relative to each other for at tachment by soldering. Such a crystal and its mounting is shown and described in general in -my1co-pending application, Serial No. 471,884,

filed January 9, 1943, to which reference may be had for further description. In such a crystal sub-assemblage of the type referred to, an electrical lead wire extends perpendicularly from each of the,opposed faces of the crystal which are coated with a metal film and are soldered to the center or nodal point of the crystal. The referrerd-to crystal mounting sub assemblage comprises a, base carrying terminal members, to each of which is attached one end of a semi-circular mounting and electrical connecting spring, the opposite ends of the springs extending in the same direction in spaced rela tion and at their free ends each carry a mass of solder in the form of a, head, the two beadsbeing in alignment. The final step in connecting the. sub-assemblages is to solder the beaded ends of the springs to the lead wires extending will be absorbed in; i. eL, damped'out by, or will be totally reflected by the solder mass and thus.

not transmitted to the mounting springs; The

predetermined mass and distance involved will,

in each case, depend upon the frequency of the mechanical vibration in question, which, in turn, will depend upon the frequency of applied across the crystal. I v

An object of this invention is to provide a practicable, eflicientand reliable apparatus for accurately assembling, locating and supporting (parts relative to each other for attachment.'

In accordance with the above object, this invention contemplates, in one embodiment there of as applied to the assembling of and attachment by solder ofthe above-referred-to types of sub-assemblages of piezoelectric crystals and the potential v their mountings, an apparatus comprising a base, cooperating sets of jaw members thereon for holding and locating the crystal with its lead wires and a support on the base for guiding the crystal mounting with its solder beaded springs into predetermined position relative to the crystal lead wires for subsequent soldering-j thereto. One set of jawmembers is horizontally aligned and pivotally mounted so that, upon movement away from the other set of jaw members, the crystal and lead wires may be mounted in predetermined position therebetween and,-

upon return movement of the pivotal jaw members, to hold and laterally position the crystal relative to the companion set of horizontally aligned jaw members. Vertically aligned jaw members, one of each set, are mounted for slight lateral movement whereby, upon completion of the soldering operations and a predetermined movement of the pivotal jaw members to release the assemblage, they are cammed slightly inwardly to insure that there will be no adhesion by solder flux of the soldered cormection at one side of the crystal to the jaw members. One set of horizontally aligned jaw members is so arranged and shaped that, in guiding the mounting into position, the solder heads attached to the springs engage the jaw faces and are cammed outwardly from the plane. of the of the crystal predetermined distances.

respective adjacent metal film covered faces The outer faces of the jaw members are chromium plated surrounding the positions where the solder beads on the springs are located ready for the soldering operations to reduce any tendency of adhesion of solder thereto."

Other objects and advantages of this invention will more fully appear from the following detailed description taken in conjunction with the accompanying drawings, in which Figs. 1 and 2 are greatly enlarged perspective views of a piezoelectric crystal and its mounting, respectively before assembly and attachassembling locating and supporting the crystal and its mounting, the crystal'h'olding iaw mem bers being .operated to receive a crystal;

' Fig. 5 is'a viewjsimilar to Fig. 4 showing the jaw members in their operated positions holding I a crystal and its mounting position on the apparatus, the soldered beaded mounting springs for the crystal being predeterminedly located along the crystal lead-wires and from the faces of the crystal ready for the soldering operations; Fig. 6 is an enlarged fragmentary end view of the jaw members, looking in the direction of the arrow indicated in Fig. 5;

Fig. '7 is a view similar to Fig. 6 showing the apparatus rotated 90 and elevated to bring one of the solder beads into engagement with a fixed soldering iron indicated fragmentarily in broken outline, the apparatus thereafterbeing reversed to engage the opposite solder bead with the iron; Fig. 8 is a view of the jaw members as shown in Fig. 6 after the soldering operations, one set of horizontally aligned jaw members being raised to permit the removal of the attached assemblages and the right hand vertically aligned jaw members being moved laterally inwardly to free igie lower right hand jaw member from the solder Fig. 9 is an enlarged fragmentary vertical section taken on the line 99 of Fig. 10;

Fig. 10 is a fragmentary vertical section taken on the line Ill-l of Fig. 9; and

Fig. 11 is'a horizontal section taken on the line I l-H of Fig. 9.

. inner opposed faces of the upper jaw members lodged electrical lead wires 4|.extending from opposed faces of a crystal 42 of the type hereinbefore described (Figs. 1 and 2), when the crystal is correctly supported in the apparatus (Figs. 5, 6 and 9). The inner opposed faces of the jaw members 24, .25, 30' and 3| at each side of the meeting line of thefaces 38 and 39 thereof are beveled, as indicated at 45, to provide clearance for a solder mass 46 resulting from the attachment of the lead wires 4| to the crystal 52 and, v

in the case of the beveled faces 45 on 'the upper jaw members 30 and 3|, to guide the crystal 22 into a space 41 between the jaw members and thus accurately laterally positioning the crystal relative to the

lower jaw members

24 and 25. The

30 and 3| are spaced apart such a distance, as clearly shown in-Figs. ,6, '7 and 8, at 41, that the crystal 22, after being supported by means of its lead wires 4| resting in the depressions 40 0f the

lower jaw members

24 and 25, may be freely entered therebetween as the jaw -members 30 and 3| are lowered from their positions shown in Fig.

' 4 to that shown in Figs. 5, 6 and 9. The inner Referring to the drawings in detail, I5 indicates a standard or support-for the operating parts of the apparatus having an attached foot member l6 upon which the apparatus freely rests during the assembling operation on a bench or table top (not shown) At its upper end, the

, standard I5 is notched at H (Fig. and .ver-

tically pivoted therein is a block I8 provided with a depending integral pin l9 rotatably fitted in an aperture 2| in the standard IS. The block W and a portion of thestandard I5 at the right of the block (Fig. 10) are each notched at 23 and suitably secured in the notches at their lower ends are irregularly shaped jaw members 24 and25, one in each notch, which are similar in detail except that the member 24 is left-hand and the member 25 is right-hand, as viewed in Fig. 4;

Pivoted horizontally at 23 and 2? on the block i8 and standard portion 20, respectively, and arranged in the notches 23 above the

jaw members

24 and 25, are jawmembers 39 and 3|, which are similar in detail except that the member is left-hand and the member 3| is right-hand, as viewed in Fig. 4. The right ends of the pivotal jaw members 30 and 3| terminate in

hand 1evers

32 and 33, respectively, for withdrawing the latter jaws from the

jaws

24 and 25, as shown in.

Figs. 4 and 8. Torsion springs 34 (Fig. 10), each having one end thereof bearing against their associated

levers

32 and 33 and their opposite ends anchored at .35 to the standard I5, functionto return the jaw members 30 and 3| to their lower operative positions (Figs. 5, 6, 9 and 10) upon release of the levers 32 and'33. The return movement of the jaw'members 39 and 3| is limited by'relatively short depending horizontal faces 38 at the outer free ends of the jaw members engaging aligned recessed faces 39 on the similar endsof the jaw-

members

24 and 25. No contact between any of the adjacent horizontal and verticalfaces' of the four jaw members occurs except as described aboveat38- and 39.

At their right ends, each of the aligned sets of jaw member faces 38 and 39 is formed with a semi-circular depression 40. The depressions 40 cooperate to form spaced sets of. apertures when the jaw member are-closed and in .which are opposed faces of the

lower jaw members

24 and 25 have a considerably greater spacing 48 therebetween than that between the jaw members 30 and 3|, which permits the jaw member 25 to move laterally (Fig. 8) toward the adjacent face of the crystal 42 when its pivotal mounting block i3 is operated in a manner and for a purpose to v be described hereinafter. 1

Outer faces 50 of" each of the vertically arranged sets of

jaw members

24 and 33 and 25 and 3| are inclined inwardly toward their upper and lower longitudinal edges from vertical faces 5| at each side of the faces 38 and 39 (Fig. 6).- The inclined faces 50 have a tendency to prevent the flow of solder from the immediate points of soldering and further to provide more clearance for a soldering iron tip 52, shown fragmentarily in broken outline in Fig.7 and also to increase the visibility of the operator in performing the soldering operations. 4 l I Secured to the left sideface of the standard l5, below'the jaw members (Figs. 4, .5 and 9), is a horizontally extendingguide and support 53 for a crystal mounting base or block 54 of the type heretofore described, the support having vertical side walls 51 and a bottom wall 58 upon which the block 54 is mounted and slid into position each'carry'a mass of solder in the formof a bead- 34', the two beads being in horizontal alignment, andinitially spaced apart with their supporting spring ends such a distance that as the block is slid into locating position on the support 53,

the opposed inner faces of the beads engage the junctures of the outer faces 50 and 5| of the

lower jaw members

24 and 25 and are cammed slightly outwardly-t0 space them" from the adjaf cent metal film covered faces of the crystal 42 similar accurate predetermined 'distances which,

as hereinbefore described, is an important factor in the operation of the crystal 42 when in use. The distance between the inside faces of the solder beads 64 before the-block 54 is mounted on the apparatus is generally slightly less than the distance between the junctures of .the faces 50 and of the

jaw members

24 and 25 and thus the latter faces serve as gauge faces.

As hereinbefore described, the block l8, upon which is horizontally pivoted at 26 the jaw member 3| and to which is fixed the jaw member 25, is vertically pivoted on the standard I5 by means of the pin IS. A coiled expansion spring 65, having its opposite ends bearing in recesses in the

jaw members

24 and 25, acts to maintain the block l8 in its normal position (Figs. 4, 5 and 6) and 'thus ,,'the space 41 between the jaw members 30 and 3| and the space 48 between the

jaw members

24 and 25 will normally be held fixed. An adjustable stop screw 66, threaded through the block I3 and bearing against the portion of the standard l5, limits the movement of the hlock in a counterclockwise direction, as viewed in Fig.

11, under the action of the spring-65.

A pivotal movement of the block la in a clockwise direction is eifected, referring to Fig. 4, when a cam face 61 on the hand lever 33 is pressed against a curved face of a, stationary stiif 1 spring blade 68 secured to an extension 1| on the thejaw member 25. This latter movement of the jaw member 25, as indicated in Fig. 8 by the broken and full line positions of the jaw member, is for the purpose of freeing the assemblage from the jaw members 24 and in case of any solder flux adhesion therebetween. An adjustable stop member 12 carried on the standard extension H limits the clockwise movement of the hand lever 33, as viewed in Fig. 4, and thus the similar movement of the jaw member 25, as viewed in Fig. 11. A suitable space I3 is provided between the opposed inner faces of the block I8 and the standard position 20 to permit the necessary pivotal movement of the block.

The use and operation of the apparatus, it is believed, will be understood from the above detailed description without a general description of operation. In using the apparatus, the jaw members and 3| are first swung away from the

jaw members

24 and 25 by depressing the hand levers 32 and 33, as shownin Fig. 4,\and a crystal 42 is mounted in position by means of its lead wires 4| resting in the spaced depressions of the

jaw members

24 and 25. The release of the hand levers 32 and 33 permits the jaw' members 30 and 3| to move downward and the beveled faces thereon engage opposite'faces of the crystal to guide the crystal into the space 41 between the jaw members and shifting the crystal laterally between the

jaw members

24 and 25 if it is not accurately positioned therebetween. As the faces 38 and 39 of the two sets of jaw members engage, the lead wires 4| of the crystal-will be lodged in the cooperating depressions 40 of the jaw members. This latter position of the jaw members 30 and 3| with the crystal 42 in correct position is shown in Figs. 5, 6, 7 and 9. The crystal mounting block 54 is then mounted on the support 53 and slid into position against the left face of the standard l5 (Figs. 5-and 9). As the block 54 is moved into position, the inside faces of the spaced aligned solder beads 54 attached to the springs 6| ride into engagement with the junctures of the outer gauge faces and 5| of the

lower jaw members

24 and 25 and are cammed outwardly to provide similar accurate distances between the metal film covered faces of the crystal 42 and the inside faces of the, solder beads for the purpose hereinbefore referred to;

With the piezoelectric crystal 42 and its lead wires 4| thus assembled with and accurately located relative to the mounting block 54 and its solder beaded springs 6| on the apparatus, the

operator, after clipping the lead wires 4| at the points indicated at 1.4 in 'Fig. 6, bodily lifts the apparatus with its attached foot member l6, swings it 90 and engages one solder bead 54 with the heated soldering iron tip 52 (Fig. '7) and then .reverses the apparatus to engage the opposite solder head 64 with the tip. The solder beads thus fused embrace the lead wires 4| and fully engage the vertical faces 5| of the jaw members, as clearly shown in Fig. 7. To remove the completed assemblage from the apparatus, the operator, after supporting it again on the attached foot member I6, which rests on the supporting bench or table top, depresses the hand levers 32 and 33 until the cam face 61 on the lever 33 operatively engages the spring blade 68, which, in

the manner hereinbefore described, causes the jaw member 25 to be slightly rotated away from the engaged solder head 84 to its full line posi-. l

tion (Fig. 8),- thus breaking any flux adhesion between the bead and the jaw member. Any adhesion between the jaw member 24 and its engaged solder head 64 will readily be broken when the operator grasps the mounting block 54 and slides the assemblage from the support 53. While the jaw members 30 and 3| are still raised, another crystal 42, with its lead wires, is mounted on the

jaw members

24 and 25 and the assembling operation is repeated.

It will be understood that the embodimentv herein described is merely illustrative of the invention and one application thereof and that other modifications can be made and it is capable of other applications.

. What is claimed is: 1. In an apparatus for assembling and locating parts of an article relative to each other for attachment by soldering wherein a first part includes members extending therefrom for attatchment to solder 0n the ends of yieldable members carried on a second part, a support, cooperating sets of jaws mounted on said support, one'set being pivotally mounted for movement to and from the other set, each set having cooperating depressions for receiving and locating the members of and saidfirst part in one direction, said first set adapted to freely engageably receive therebetween said first part to locate the same and its members in another direction relative to said other set of jaws, said other set of jaws having predeterminedly spaced gauge faces at their outer sides, andmeans for guiding, supporting and locating said second part and its members relative tosaid first part and its members the solder on the ends of the yieldable members engaging the gauge faces of said other set of jaws for locating the same relative to the members on said first part.

2. In an apparatus for assembling and locating parts of an article relative to each other for attachment by soldering wherein a first part includes members extending p rpendicularly from solder on the ends of yieldable members carried on a second part, a support, cooperating sets of jaws mounted on said support, one set being pivotally mounted for movement to and from the other set, each set having cooperating depressions for receiving and locating the members of and said first part in one direction, said first set adapted to freely engageably receive therebetween said first part to locate the same and its members in another direction relative to said other set of jaws, means for guiding, supporting and locating said second part relative to said first part and thereby the yieldable members on said second part relative to the members on said first part, said other set of jaws having predeterminedly'spaced outer side gauge faces engaged by the solder on the ends of the yieldable members on said second part while locating the latter part on said supporting means effective to move said soldered ends to space the, engaged solder faces similar predetermined distances from the outer faces of the first part, and means for operating sa d movable set of jaws.

3. In an apparatus for assembling articles, a support, a pivotally mounted block thereon, a pair of cooperating jaws for supporting one portion of an article, one of said jaws being fixed on said support and the other jaw fixed to said block, a second pair of jaws cooperating with said first jaws for positioning and holding said one portion relative to a second portion carried on said support, one of said latter jaws being pivotally mounted on said support and the other of said jaws pivotally mounted on said block and having an extension, and camming means on said support engaged by said latter jaw extension during a disengaging pivotal movement of said second pair of jaws from the assembled article to laterally move said jaws mounted on saidpivotal block toward their companion jaws.

4. In an apparatus for assembling articles, a

support, a pivotally mounted block thereon, a. pair of cooperating jaws for supporting one portion of an article, one of said jaws being fixed on said support and the other jaw fixed to said block, a second pair of jaws cooperating with said first jaws for positioning and holding said one portion relative to a second portion carried on said support, one of said latter jaws being pivotally mounted on said support and the other of said jaws being pivotally mounted on said block and having a rearwardly extending extension, and camming means on said support arranged in the path of said latter jaw extension efiective during a disengagi g pivotal movement of said second pair of jaws from the assembled article to laterally move said jaws mounted on said pivotal block toward their companion jaws to break any adhesion between the portions and the jaws.

5. In an apparatus for assembling articles, a support, a pivotally mounted block thereon, a pair of cooperating jaws for supporting oppositely extending members of one portion of an article, one of said jaws being fixed on said support and the other jawifixed to said block, a, second pair of jaws cooperating withsaid first jaws for positioning and holding an intermediate member of said one portion relative to a second portion carried on said support, means on said support and engaging said second pair of jaws for urging them into operative positions with said intermediate member of the article, one of said latter jaws lee-- ing pivotally mounted on said support and the other of said jaws being pivotally mounted on said block for movement at an angle to the pivotal movement of said block, said latter jaw having an extension, and camming means on said support engaged by said jaw extension during a disengaging pivotal movement of said second pair of jaws from the assembled article to laterally move said jaws mounted on said block toward their companion jaws.

' ROBERT E. BROOKS.