US1822441A - Assembling apparatus - Google Patents

Description

, Sept. 8, 1931. c. o. KNUUTl ET AL ASSEMBLING APPARATUS Filed March 9. 1929 3 Sheets-Shed 1 071 6/7/0/6 fldz/es 0 Max/77 mes/WA. Ale/I? C. O. KNUUTI ET AL AS SEMBLING APPARATUS Sept. 8, 1931.

Filed March 9, 1929 3 Sheets-Sheet 2 Sept. 8, 1931. c. OQKNUUTI ET AL 1,822,441

ASSEMBLING APPARATUS Filed March 9. 1929 s Sheets-Sheet a Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE g ILLINOIS, ASSIGNORS TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK ASSEMBLING APPARATUS I application filed March 9, 1929. Serial No. 345,721.

This invention relateb to assembling apparatus, and more particularly to apparatus for assembling a plurality of similar parts in close juxtaposition to each other.

In the assembling of parts into a unit, there are a number of instances where it is necessary that the parts be thoroughly compressed and firmly secured to each other before the unit is ready for use. Thus, in the manufacture of step by step type telephone terminal banks the terminals are secured between strips of insulation and the bank is tightly compressed and securely bolted together in order to keep the terminals in position. In compressing such assemblies it is of course desirous that the compressing and bolting actionbe accomplished in the minimum amount of time in order to reduce the production cost.

An object of this invention is to provide an economical and efiicient apparatus for assembling parts.

In accordance with this object one embodiment of the invention consists of a plunger and block for compressing parts constituting an assembly while a plurality of screw drivers, operated simultaneously by a common hand wheel, tighten the bolts thereof to produce a rigid assembly. The plunger is actuated by a plural lobed camand toggle device which requires the minimum number of movements of another hand wheel to efiect the compression, and a resilient member is connected to the toggle apparatus to prevent excessive compression.

These and other objects of the invention will become apparent from the following description of one embodiment thereof when taken in connection with the accompanying drawings, wherein- Fig. 1 is a plan view of the step by step a type telephone terminal bank which the structure is constructed to assemble;

Fig. 2 is an end view of the same bank; Fig. 3'is a fragmentary plan view of a structure for preliminarily assembling the bank of Figs. 1 and 2';

Fig. 4 is an elevational, front view of the assembling apparatus;

Fig. 5 is a sectional View of the same aplike numerals designate similar parts in the several figures, there is disclosed in Figs. 1 and 2 a step by step type telephone terminal bank 15, which the structure is designed to assemble. The terminal bank 15 consists of a plurality of separated metallic terminals 16 arranged in rows and held between metal plates 17 by the compression afforded by bolts 18 extending through thebank, strips of insulation 19 being interposed between the rows. The bank 15 is preliminarily assembled in the structure shown in Fig. 3 which consists of slotted hub and rim members 20 and 21, respectively, for predeterminedly positioning the terminals 16 during the initial assembling of the bank. A base 22 of this apparatus contains recesses 23 for retaining nuts 24 of the bolts 18 while the bolts are preliminarily tightened by any suitable screw driver engaging the slots of the screw heads25. This preliminary assembly leaves the bank 15 loosely held together by the bolts 18, and it is the purpose of the final assembling structure to compress the bank and tighten the bolts 18 to produce a compact and rigid unit.

The assembling apparatus, shown in Figs. 4- to 8, consists of a semi-cylindrical, inclined block 27 which has a horizontally extending support 28 that may be attached to the top of a. working table, not shown. A semicylindri cal chamber 29 is provided in the front of the block 27 for receiving the preliminarily assembled terminal bank 15, and a plunger 30 is slidably mounted within the chamber 29 for compressing the bank 15 upwardly against a head piece 31 at the top 0 the chamber. It will be noted in Fig. 6 that the plunger 30 has nut shaped recesses '32 suitably positioned for receiving the nuts crmrmns orro KNUUTI, or BERWYN, AND cnnsrna ALLISON mmzenn. or CHICAGO,

24 of the bolts 18, and it is also to be noted here, as shown in Fig. 5, that these recesses have concentric depressions 33 for receiving the projecting threaded ends-of the bolts 18 in order that the bolts may be tightened considerabl by screw drivers during the time that t e are being compressed by'the plun er 30. lhe plunger is held wlthm the c amber 29 by a pair of straps 34 secured by screws 35 to the edges of the chamber, and also, by a triangular block 36 secured to the horizontal support 28 by screws 37 (Fig. 5) and having a dia onal surface 38 adjacent the. plunger. our knobs 39 project from the outer edges of the plunger 30 and the head piece 31 to receive apertures 40 (Fig. 1) in the plates 17 of the bank 15.

In order to actuate the plunger 30 there is provided a cam and tog 1e device as follows: The lower side of t e lunger 30 is connected by a pin 43 to a Y- liaped link 44 (Figs. 4 and 5) of the to gle, and a pin 45 connects the other end of the link 44 to a U-shaped link 46 that has a roller 47 pinned thereto for engaging a three-lobed cam 48.

, The link 46 is secured by a pin 49 to a pair of side straps 50 that are secured by screws 51 (Fig. 5) to a hinge 52 pinned at 53, to the aforementioned triangular guide block 36. Thus it is to be noticed that there is provided a toggle device consisting of two inks 44 and 46 which toggle of its own accord rests upon the three-lobed cam 48 through the roller 47. The hinge 52 supporting the lower end of this toggle arrangement is retained at its lower end as apKears below.

pair of parellel walls 54 and 55 depend from the block 27 and are positioned in close roximity to the sides of the aforedescri ed toggle device to prevent possible sidewise movement of the links and pins thereof, and also to 'ournal a shaft 56 for mounting the three-lo edcam 48. The right end (Fig. 4) of the shaft 56 has a spiral gear 57 secured thereto by nuts 58, and a worm gear 59 engages this gear and is keyed to a shaft 60 that is journalled in the lower end of a box shaped housin Fig. 4) that depends from the block 2 for t at purpose. A plate 62 secured by screws 63 encloses the right side of the housing 61. Threadedonto the right end of the shaft 60 are nuts 64 (Fig. 5) which prevent the shaft from moving longitudinally relative to the housing 61, and on the left end of the shaft there is keyed a solid hand wheel 65 locked thereon by nuts 66. At the back of the walls 54 and 55 there is secured a plate 67 having an aperture 68 through which extends a shaft 69 pinned at 70 to the lower end of the aforementioned hinge 52. The right hand end of the shaft 69 (Fig. 5) has a boss .71 on the left side of the aperture 68 plete compression stage to prevent. the shaft from being drawn therethrough, and on the right side a helical spring 72 compressed b nuts 73 threaded to the shaft. A shield 4 encloses the projecting end of shaft 69.

A short description of the compressing operation of the bank now follows. The bank is placed in the compressing chamber 29 with the two a ertures 40 of the lower plate 17 of the ban engaging the two positioning knobs 39 of the plunger 30, and the nuts 24 and threaded ends of the bolts 18 engaging the nut depressions 32 and concentric recesses 33 in the plunger, respectively. The operator then rotates the hand wheel 65 in a clockwise direction (Fig. 4) to rotate the gears 59 and 57 (Fig. 4), the shaft 56, and the three-lobed cam 48 keyed thereto in a clockwise direction. It will be noted here that as the cam has three similar lobes it will be necessary to rotate the shaft 56 only onethird of a revolution in order to actuate the toggle links 46 and 44 to accomplish the desired compression by means of the plunger 30, and thus the provision of three similar lobes on the cam effects a considerable saving of time. Furthermore, these lobes are curved, as will be seen in Fig. 5. so that they at first actuate the plunger rapidly to quickly engage the bank, and then when the compression is started they act slowly so as to allow the operator an opportunity to gau e the bank, and thereafter abruptly and quickly allowing. the plunger to drop in order to receive the next bank. It will also be noted that the cam 48 is continually rotata ble in the same direction, and thus the hand wheel 65 is continually rotatable in the same direction and no reversal is necessary. By continuing the rotation of the hand wheel 65 in a clockwise direction the toggle links will become extended almost in a straight line, as shown in Fig. 5, and at this stage the bank 15 Within the compression chamber will be almost completely compressed and the toggle links will react against the hinge 52 and rotate it clockwise (Fig. 5) against the resilient, resisting force ofthe spring 72. The spring 72 may be adjusted to regulate the amount of compression to which the .bank 15 is subjected. In order to indicate to the operator that the comis reach )d so that he may gauge the ban to insure correct results there is provided a resilient indicating rod 76 that is secured by screws 77 at its lower end to thelower end of the hinge 52. The top end of the rod is enclosed by a housing 78 that is secured to the block 36, and the lower middle portion of the rod 76 upon its right side is normally engaged by a stationary rod 79 (Fig. 5) extending at one end through an aperture 80 in the hinge and threaded into the plate 67 at its opposite end so that when the hinge 52 moves outwardly during 00113111358101] of the retained within the support 84, and a transe ro verse shaft 99. The shaft 99 has a hand plun er 30 the top of t 76 moves inwar ly as it leaves the stationary rod 79 due to its resiliency to indicate to the o erator that the bank 15 is being compresse The operator then applies a hand gauge to the bank and proceeds with the compression until the bank is of the desired thickness.

.When. the hinge 52 moves inwardly after the compression of the bank or when the parts are in a normal osition the lower end of the resilient rod 6 again on ages the left end of the rod 79 and moves t e top of the rod 76 outwardly to the dotted outline position thereof (Fig. 5). With the compression thus com leted it is necessary at the same time to tighten the bolts 18 in order to retainthe compression, and the screw driver structure for performing this tightening will now be described. However, from the foregoing explanation it will be understood that the hand wheel 65 and the and the lower surface of the housin cam and toggle structure provide a great amount of leverage and a high degree of compression in a limited amount of time.

The screw driver structure for tightening the bolts 18 consists of a plurality of suitably arranged shafts denoted generally by the numeral 83, whichare journalled within a semi-cylindrical support .84 that 1s secured by screws 85 (only one of which 18 shown) to the upper surface of the block 27, which shafts are also journalled within a cylindrical housing 86 that is mounted on the upper end of the support 84. A sleeve 87 Figs. 7 and 5) is pinned at 88 to each sha t 83, and between the top of this sleeggc there is interposed a helical spring 89 w ich serves to resiliently force the shaft 83 downwardly through apertures provided in the 'head piece 31 so that the lower screw driver 91 and a slidable collar 92 mounted on a diminished. portion 93 of the shaft is resili ently held in engagement with a roughened collar 94 on the lower portion/of the shaft by means of a helical spring 95 that is ad justed by 'nuts 96 that may be reached through an aperture 97. Thus it Wlll be understood that the slidable collar 92 re mains inengagement with the collar 94 integral with the lower portionof the shaft 83 until suflicient resisting torque is produced by the bolt 18 being tightened to slide the collar 92 upwardl against the resistance of the spring 95 an out of engagement with the lower portion of the screw driver.

Within the housing 86 there are jour nalled an inclined shaft 98, which is also that are secured to each screw driver shaft 83. The gears 104- and 105 being of the spiral type assist the springs 89 to maintain the screw driver in contact with the bolts 18 and this downward thrust is absolutely required when the bolts have been tightened to quite an extent.

The operation of the screw driving structure is apparent from the above description. The operator rotates the hand wheel 100 in a clockwise direction (Fig. 4) to rotate the bevel gears 101 and 102 and thus rotate the spiral gears 104 and 105 to actuate the various screw drivers in one operation. Thuswhile the bank 15 is held under compresslon by the plunger 30 the screw driver shafts 83 simultaneously and in one operato preserve the comtion tighten the bolts 18 pression. It is therefore apparent that the above described structure efficiently cornpresses and tightens the bank 15, in a minimum amount of time and in the least number of operations and that the resulting product is a compact and rigid unit.

Although the structure is here described and illustrated for compressing telephone terminal banks it will of course be understood that it may be used for compressing other stacked parts and that the invention is to be limited only by the scope of the appended claims.

What is claimed is:

In an apparatus for assembling parts, means for retaining the parts, means cooperating therewith for compressing the parts, toggle means connected to the compressing means for actuating the compressing means, and a cam member for actuating the tog 1e means, said cam member having a plurality of similar lobes for effecting the actuation.

2. In an apparatus for assembling parts, means for retaining the parts, means cooperating therewith for compressing the parts, toggle means connected to thecompressing means for actuating the compressing means, and resilient means connected therewith for limiting the movement thereof.

3. In an apparatus for assembling parts, means for retaining the parts, means cooperating therewith for compressing the parts, toggle means connected to the compressing means for actuating the compressing means, a hinged member suspended from the retaining means for securing the toggle means, and resilient means connected to the hinged member for limiting the movement of the toggle means.

4. In an apparatus for assembling parts, means for securing the parts, means mounted adjacent to the securing means for compressing the parts, toggle means connected to the compressing means for actuatmg the compressing means, and means continually operable in the same direction for actuating the toggle means.

5. In an apparatus for assembling bolted arts, a block having a chamber for receivmg the arts, a plunger slidably mounted within t e chamber for compressing the parts, said plunger having suitable apertures for engaging the nuts of the bolts, a plurality of screw drivers mounted at the end of the chamber opposite the plunger for engaging the bolt heads to tighten the bolts, a .cam member for actuating the plunger, and a common gear member for actuating the screw drivers while the parts are under compression.

6. Inan apparatus for assembling parts, means for retaining the parts, comprising movable and stationary members engageable with opposite portions thereof, a lurality of connected links, one of the lmksoperatively connected to the movable member, and rotatable means operatively associated with another of the links for causing an actuation of the links to compress the parts.

7. In an apparatus for assembling bolted parts, means for retaining the bolted parts, comprising movable andstationary members engageable with opposite portions thereof, a-plurality of links operatively connected with the movable member for compressin the bolted parts, and means for tightening the bolts of the parts while the parts are under compression. f

In witness whereof, we hereunto subscribe gag-James this 27th day of February, A. D.

CHARLES OTTO KNUUTI. CHESTER ALLISON METZGER.

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