Патент USA US2131821код для вставки
w 4, 193“ C. R. SCHLICHT ' 2,131.,21 SHEET METAL SEAMING TOOL Filed Dec. 9, 1936 2 Sheets-Sheet l w: 4, 193.&* c. R SCHLICHT 2,13L1 SHEET METAL SEAMING TOOL FilQd Dec. 9, 1936 2 Sheets-‘Sheet 2 29/ E 12,‘ r W / J/ 077.96% " v ‘ Patented Oct. 4, 1938 ' 2,131,821 UNITED :STATES PATENT OFFICE ’ 7 2,131,821 SHEET METAL SEAMING TOOL ‘ Carl R. Schlicht, near La Crosse, Wis. ‘ Application December 9, 1936, Serial No. 114,984 ‘ 8 Claims. (01. 113--56) One of ‘the main objects of this invention is to provide such a seaming tool which is simple and economical in construction, and which is w comparatively easy to operate so as to conserve " 5 ‘energy and will at the same time produce a ?rmly clenched seam. ' r A further object of this invention is to provide a seaming ‘tool wherein the leverage of a chief operating member, and thereby the force exerted by the jaws on the seam, is gradually and auto matically increased as the‘clenching operation proceeds, so aslto produce a maximum of clench ing pressure'at the ?nal part of each ‘clenching , ‘ ' ‘movement therebetween. For the sake of econ omy, these levers are made from suitable lengths of ordinary strong metal pipes; and for the lever , connecting means I3 I preferably use a strong “ 5 leaf hinge, which includes a leaf l5 anda lead? It. Said levers II and I2 are secured, respectively, to the hinge leafs I5 and 16, preferably by welding or securing the two levers in two openings provided in the hinge leaves[ The jaw members I‘! and H! of this tool-‘are , , angle-shaped in cross-section, being substantially in the form of angle‘plates, which comprise, re spectively, the clenching jaw portions l1’ and I8’ step and provide a- ?rmly clenched seam. “ll ‘ connecting them to provide pivotal or hinged Another object of this invention is to provide ‘ serving as they active jaw portions engaging the " ‘ such a seaming tool wherein the two jaws, are seam, and‘ the mounting’ angle portions I1’? and differently arranged and are actuated to function ' l8" wherebythe jaw members are connected to diiferently, so? that this tool is adapted for per the two opposite hinge parts of hinge means It‘. forming different bending operations by reversing 20 its positions on the seam. ‘ ‘1 ‘ ‘ *‘Still' another object is to provide such an e?i cient ‘seaming tool which is arranged so that it ‘can. be ‘economically ‘built by utilizingiseveral ‘standard and readily, obtainable‘members ‘for providing several of its parts.’ >1 i i ‘ the hinge leaf l5, as by riveting it thereto, and has its clenching portion l1’ dependingtherefrom; connection with ‘the ‘ accompanying drawings portion l8’ extending horizontally toward said clenching portion l'l’,‘ adapted to be movable ous other forms ‘and arrangements vmay be re sorted to for carrying out the objects and pur poses ‘of this invention‘. In the‘ drawings: ' ‘ ‘ Fig. l is a top plan view of my novel seaming tool illustrated in. its preferred form of construc tion. » ' - ‘ ‘~ ' ‘Fig'. 2 is an elevational view of the tool in posi 1 ‘.40 tion on ‘a seam; ‘after’ completing the ?rst step of the seaming operation. Fig. 3 is a view‘similar to that ‘of Fig. 2, but showing the tool in position on the seamv at the beginning of the seaming operation. , ‘45 ond step of the seaming operation. - Fig. 5 is a view similar to that shown in Fig. 4, with the tool in said reversed position, and when the'second'step of the seaming operation has been completed. ‘ while the other jaw member l8 has its clenching under hinge leaf I6‘, and it has its mounting por tion‘ l8" provided-with means which connects it slidably with the levers and'the hinge means. In the form of construction shown in the ‘drawings the slidable mounting means for jaw member l8 includes a pair of sleeves l9 secured V on hinge leaf "3, and a pair'of shafts 20 secured to angle portion I8", as by threading them there in and, using locknuts 2| thereon. The shafts 20 are slidable in sleeves l9, and slidable movement 40 is thereby provided to jaw portion l8’ toward and away from jaw portion l1’, to-and-fro under neath hinge leaf “5. . Means is also provided herein for increasing th Fig. 4 is an elevational view of the tool on'the seam, but shown in its reversed position from that shown in Fig. 2, and at the beginning of the sec ‘ other jaw member is slidably mounted on the de vice to provide a sliding movement to it toward and away from its companion jaw member. ‘In this illustrated construction the jaw member I’! has its mounting portion l1" secured underneath These and various other objects and advantages are attained with this invention, as will become apparent from the following description taken‘ in ‘3'0 wherein the invention is shown‘ in its preferred form of construction, it being apparent that vari 35 One ‘of these jaw members is ?xedly connected to a‘hinge part and its associated lever, while the r My invention is illustrated in the‘ drawings in its preferred form of construction. comprising a pair of operating levers II and‘ I2 and means 13 clenching force of the levers upon the jaw mem 4:5 bers .during the seaming operation, and in the form illustrated this means includes a collar 22 mounted slidably on lever H, and a pair of links 23 connected to the collar by pivot pins 24. A clevis or yoke-shaped‘ member 25 is ‘secured to angle portion l8", by bolts 26 or the~1ike, and this member 25 is pivotally connected to the free ends of said links 23, as by means of pivot pins 24'. extending outward from. the arms of the yoke member, as best shown in Fig. 1. ‘ . ‘ 55 2 2,131,821 In operating this seaming tool it is ?rst placed as indicated in Fig. 3, so that the hinge means rests upon the superposed ?anges or bent por tions 2'! and 28 which have been previously pro vided at the joining edge portions of the sheets of metal 29 and 30 to be connected by the seam. The jaw portion I8’ is placed at the outside of the depending portion 28’ of the superposed portion 28; and the jaw portion I ‘l’ is placed to bear 10 against the opposite edge partof the superposed portions 2"! and 28, to serve as the holding‘ jaw. Then, upon moving lever ll away from lever 12, the links 23 draw jaw member 18 forward and and the ?rst said connecting means to mount this jaw member for slidable movement toward and away from said one jaw member, and means operatively connected to the slidable jaw mem ber and being connected with the said one lever to have movement longitudinally thereof, whereby the force applied thru the levers to the jaw members is automatically increased during the seaming operation. 2. A seaming tool comprising a pair of levers 10 and means connecting them for relative pivotal movement, a pair of jaw members one of which served as the active or clenching jaw during this includes an attaching portion and a depending jaw portion, means ?xedly connecting one of said levers with the said attaching portion, the second 15 jaw member including an upper mounting por tion and‘ a jaw portion extending therefrom to ward said depending jaw portion, means con ?rst step, while the other jaw portion ll’ served necting the said mounting portion operatively as the holding jaw, and gradually swung down ward against the upstanding‘ part _3-lv of the seam, with the ?rst said connecting means to provide said second jaw member with slidable movement relative'to‘ the ?rst said connecting means, and means operatively connected with the said mount ing portion and with the said one lever to operate force its jaw portion 98’ against the depending‘ 15 portion 28’ to bend it underneath seam portion 22', completing the ?rst step of theseaming opera tion, as illustrated in Fig. 2. The‘ jaw portion I8" as shown in Fig.32. Thus, when'slidable jawpor tion 18' ?rst‘ bends the over-lapping portion 28’ inwardly around the outer edge of portion '21, the 25 heel. or angle part of jaw member I‘! bears against said second jaw member,v thereby adapting the 25 the opposite edge part of the superposed portions tool for different bending operations by revers 21 and 28, as shownin Fig. 3, and in the directly ing it on the seam. opposite direction to the pressure exerted by the 3. A- seaming' tool comprising a pair of levers bending'upper edgerv part'of seam portion .28’, and means connecting them for relative pivotal 30 where the holding effect of} jaw member ll is at amaximum, , i - _ : . _ - During the movement. of thevarious parts, in performing this ?rst step of thelseaming opera-. tion, the shafts 20 have slid further‘ into sleeves i9; and at the sametimacollar 22 has slid down ward on lever ‘I l, toward hinge leaf l5. vThus the leverage of lever l I has been, gradually and auto matically'increased during its operative move ment away from lever 12, thereby likewise in creasing the'force and. clenching e?ect of jaw !8" upon the seam, and more particularly during the ?nal part of each seamingvstep and. at the time when the greatest-clenching force is most valu able, to produce a-tightlylclosed seam. . The tool is then reversed‘ in its position upon the seam, for performing the next step of the seaming operation, as shown in Fig. 4. The jaw ing. one of them ?xedly with respect to one lever, means for mounting the second jaw on said con necting means to be slidable relative thereto and to the second lever, and means connected with said second jaw and including a member mounted 35 for longitudinal‘ slidable movement on the said one lever, whereby the force applied thru the levers to the jaws is automatically increased dur ing thezseaming operation. 4. The subject matter set forth in claim 3, and wherein the said one jaw has a depending plate like jaw portion, and the second jaw has a plate like lower jaw portion extending horizontally to ward said depending jaw portion to move toward it and away therefrom, thereby adapting the tool for different bending operations by reversing it on the seam. portion l8’ then bears against the upstanding 5. A tool for seaming sheet metal, comprising part 3| of the seam, and serves- as the holding 50 jaw; while the jaw portion ll’ bearson the-outer a hinge of two pivotal portions, a lever secured to each portion, a jaw ?rmly secured to one hinge portion, a second jaw, means mounting it slid ably on the'second hinge portion, and means con edge of the overlapped and superposed, portions 28, 21 and 28', and‘ serves as-the active or'clench ing jaw. Then, as the‘ tool is- actuated by swinging lever H away from lever l2, this active jawvll’ and the superposed-seam portions are brought down into the position shownain' Fig. 5, thereby completing the second‘ step of the seaming opera tion, and providing a tightly interlocked seam. 7 It should be noted that inbothrof these steps of 60 the seaming operation the lever I2: serves as a stationary or holding lever; while ,le-ver, ' H is moved by swinging it outwardlyaway from lever l2, thus functioning as the active lever; Like wise‘ note that, jaw‘ member H, which‘ is ?rmly 65 secured‘ to the swingable lever‘ H, is swung‘during both steps of the seaming, operation; while jaw member la is provided with‘ slidablemovement relative to theother jaw member and parts. I claimzl 70 . ' a . l.v A seaming tool comprising a pair of levers and a pair of jaw members, means connecting the levers for relative pivotal‘: movement, means for mounting one of said ,jaw'members ?xedly with one of said levers: and the said connecting means, means between, the second jaw member 30 movement, a pair of jaws and means for mount nected with said second jaw and provided with means embracing one of said levers to be slidable longitudinally thereon, whereby to increase auto ,55 matically the leverage of said one‘ lever and' thereby the force applied thru the levers on the jaws during the seaming operation. '6, The subject matter set forth in claim 5, and wherein the ?rst said jaw has‘ a depending por tion, while the second jaw has a lower plate-like ‘ co portion and its slidable mounting means adapts it to slide inwardly and upwardly toward the hinge during operation and thereby form a tightly clenched seam. 65 7. A tool for seaming sheet metal, comprising a pair'of levers and hinge means having a lever secured to each of its opposite hinge portions, a pair of angle-shaped jaw members, one having an upper mounting portion secured to a hinge por 70 tion and lever and also having a relatively broad jaw portion depending therefrom, the second jaw-member having a relatively broad jaw por tion extending below the‘ hinge means and to ward the idependingiportion, means for mounting 75 3 2,181,821 the second jaw member on the second hinge por tion and provide sliding movement inwardly to ward the depending jaw portion and slightly up wardly toward the hinge means, and means con nected with said slidable jaw member and being connected with said one lever to move longitudi nally thereon,- whereby to automatically and gradually increase the leverage of said one lever and thereby the force exerted thru the levers on 10 the jaws during the seaming operation and pro ber having an upper mounting portion and hav ing a plate-like jaw extending therefrom hori zontally toward the depending jaw, slidably con nected companion means having one means se cured to the mounting means of the second jaw 5 member and having the other means secured at a slant on the second hinge leaf to provide the horizontal jaw an inward and slightly upward sliding movement toward the depending jaw and the hinge, and means including a member slid vide a tightly clenched seam, said tool being able on one of the levers also link means con adapted for different seaming operations by re nected to said member and to the mounting means of said second jaw member, whereby the force exerted thru the levers on the jaws auto versing it on the seam. 8. A tool for seaming sheet metal, comprising 15 a pair of levers and a leaf hinge having a lever secured to each of the hinge leaves, a pair of jaw members, one having an upper mounting portion secured to a hinge leaf and having a plate-like jaw depending therefrom,’ the second jaw mem 10 matically and gradually increaseb during the 15 being adapted for different seaming operations by operative movement of the levers, and the tool reversing it on the seam. CARL R. SCHLICHT.