US 2968056 A
Description (OCR text may contain errors)
Jan. 17, 1961 A. AvENl 2,968,056
ENAMELED INSULATION STRIPPER FOR WIRES Filed Sept. 2, 1955 H5 IOT IIS 205 I INVENTOR. L 11' @,f ,f BYAnthony Avem d '7M-Mmm AGENT United States Patent@ ENAMELED INSULATION srRIPPER FOR WIRES Anthony Aveni, 1966 S. Normandie Ave., Los Angeles, Calif.
Filed Sept. 2, 1955, Ser. No. 532,241
2 Claims. Cl. 15-124)l This invention relates to wire stripping devices and more particularly to a novel wire stripper for wires with an enameled insulation coating.
In the use of wire for coils and such devices in electrical and electronic apparatus it is frequently necessary for this wire to bc insulated with an enamel coating. One such coating'now in general use are materials having the trade names Formex or Formvar. These coatings are so tough that only severe scraping of the coated wire will removev the coating. The scraping may result in undue weakening of the wire so that in the equipment in which the wire is installed it may be easily broken. When this happens it is more ditlicult to properly connect the wire. Improper removal of the enamel from the wire also makes it more difficult -to tin the wire with solder for solder connection thereof to the circuits or components in which the wire may be used.
This invention contemplates a device for removing the enamel coating from enamel insulated wire in a more efficient manner than prior enamel stripping means.
It has been a practice to strip the enamel coatingA from thwire with specially prepared acids. To use the acids,
the end of the wire to be stripped is dipped into the acid bath, then wiped with a cloth toremove the acid corroded enamel and finally dipped into an acid neutralizing bath and again the wire is wiped.
My invention proves mechanical means for accomplishing the eiective stripping kof enamel from enamel coated wires. A bottle or containerof the acid stripper is provided iin an integral assembly with a clamp. The jaws of the clamp are padded with removable saturable pads that may be wetted by the acid through small openings vin the portion of the bottle assembly which is attached to the clamp. A second similar bottle and padded clamp assembly is provided as part of the wire stripper to neutralize the acid. To use my invention the end of a wire is placed between the acid saturated pads in the jaws of one of the clamps for a moment and pulled, thus per- Jforming at once the dipping and stripping operation previously required as separate steps. The wire end is then placed between the neutralizer saturated pads in the gther clamp of the assembly and pulled through, thus completing the wiping and cleaning of the wire and neutralizing the acid to prevent further corrosion of the wire- Several embodiments are illustrated in the drawings `and described in the specicjation below. All of the `methods shown are related to manual operation but it is clear that mechanical automatic means can be devised to perform the functions of the wire stripper in an apice Vpropriate sequence where high-speed mass production requirements so dictate.
It is accordingly an object of this invention to provide a simple and convenient device forV stripping the enamel coating olf of enamel-insulated wires by acidaction and neutralizing the acid thereafter.
It is a further object of this invention to provide an acid wire stripper and neutralizer includinga padded clamp equipped for feeding acid to the pads and a padded clamp for a neutralizer. v
It is still another object of this` invention to provide plural manually operable padded clamps with fluid dis;- pensers attached thereto for saturating the pads thereof with iluid.
lt is a still further object of this invention to provide a stripper for stripping oi the enamel coating on enamelinsulated wires 'comprising a common assembly of a p lurality of padded clamps and iluid dispensers attached t0 said clamps for saturating the pads of the clamps.
These and other objects will be more clearly under-A- stood from the specication and' claims which follow, taken together with the accompanying drawings in which various wire strippers are shown. i'
In the drawings:
Fig. l is a drawing of a non-elected embodiment of a wire 'stripper with one-half in cross section; Y
Fig. 2 is a drawing of another non-elected embodiment of a wire stripper with one-half in cross section;
Fig. 3 is a drawing of the preferred embodimentv of this invention;
Fig. 4a is a cross-sectional view taken along lines 4a-4a of Fig. 3 of a detail of the pads used in this embodiment;
Fig. 4b is a cross sectional view similar to 4a showing lanother means of detachably holding the pads; and
Fig. 5 is a drawing of a stand of a type fory supporting the invention when not in use.
'Referring now to Fig. 1, an embodiment of a wire stripper is shown involving a bottle 101 which is designed to contain an acid stripping viluid 117, anda bottlel102 designed Ato contain a neutralizing fluid. In the drawing of Fig. V1, the bottle 101 and its associated elements, lis shown in a cross-sectional View, while the bottle 102with its associated components is shown inthe formlof its external appearance. The bottles 101 and 102 may/*be fabricated from glass which must be treated to Aprevent corrosion by acid, or the bottles may be fabricated from any one of the number of corrosion resistant plastics now available. The bottles 101 -and 102 are assembledin la common frame 103 which also forms the bases and bottom jaws as at 104 and 105 of clips which are similar to alligatorclips. The balance ofthe one clip for the acid bottle is shown sectionally to clearly illustrate the operation of the bottle and clip. The clip, associated witl'104, comprises a spring 106 and an upper jaw `107 andi lower jaw 108. Upper jaw 107 continues into handle 1'0'9 and has a screw cap 110 integrally molded as a part of the through the bottom portion of screw cap 110 which is continuous with upper jaw and handle 107 and 109. A washer 121 is provided between cap 110 and bottle 101. The washer is perforated to form a continuous flow path with openings 113 and 114 for uids contained in the container 101. A pair of acid resistant saturable pads 115 and 116 are provided. Pad 115 is attached to the under side of the upper jaw 107 and pad 116 is attached to the lower jaw 108. When bottle 101 is filled with a uid such as an acid which may be used to strip the enamel from wires, this fluid 117 will seep through openings 113 and 114 to saturate pads 115 and 116. As shown in detail at 120 (Figs. 4a and 4b) between the pad 115 and openings 113 and 114, a perforated or screen structure is provided.
When using the wire stripper as described above, the jaws 107 and 108 will open by applying pressure against handle 109 with the thumb, or otherwise. The wire to be stripped is then placed between the jaws, pressure released against handle 109, whereupon the jaws 107 and 108 will close over the wire. If the pads 116 between the jaws 107 and 108 are saturated with acid and permitted to remain closed over the wire for a predetermined time,
the enamel coating of the wire will soften and if the wire ,f
is pulled through the pads 115 and 116 of the jaws 107 a neutralizing or alkaline substance and, therefore, the j pads 115:1 and 116a of the neutralizing side of the wire stripper will be saturated with the neutralizing uid. The pads 115 or 116 are so situated in either clip that their surfaces are above the clip structure to permit insertion of the wire between the clips from any angle. Thus,
`when the wire is placed between the pads, as previously Adescribed for the acid side, it will be possible to neutralize any residual acid remaining on the wire after the enamel .has been stripped to prevent further corrosion of the wire,
leaving thereby a clean wire surface that may be readily soldered.
In Fig. 5 a stand is shown which may be formed from wire plastic or any other material. It can be seen that the bottles 101 and 102 when not in use can be supported in the spirals 501 and 502 of this stand in a position such that the bottles have their open ends up, thus preventing saturation of the pads by the uid when the wire stripper is not in use. A possible mounting means is illustrated at wire loop 503 incorporating a screw 504 which mayA be used to attach the stand to a work bench or other supporting structure.
In Fig. 2 a second version of a wire stripper is shown wherein the two bottles are molded in a common cylinder and 203 being the acid portion. The upper jaws are similar to those previously described in connection with Fig.
` 1 and are similarly identied with the same reference characters. The lower jaws 206 and 206a, shown in Fig. 2, have a screw cap molded portion 205 as an integral part thereof. Screw cap 205 has a hole at 207 into which an extension 208 of pad 116 is inserted through bottle area 203 so as to act as a wick for saturating the pad 116. The parts of the right hand side of the drawing of Fig. 2 correspond generally to those of the left-hand side and are similarly constructed and as has been described with respect to Fig. l, the left-hand side of Fig. 2 is the acid con- The use of the use of the stripper in Fig. 1.
201 with the portion 202 being the neutralizing portion The preferred embodiment of this invention is shown in Fig. 3. In the embodiment shown in Fig. 3 the acid and neutralizer bottles and the wire clamp to which each is attached, are identical with those of Fig. l. The difference in the construction as shown in Fig. 3 arises from the fact that the two bottles and their associated components are side by side instead of in line with each other and are attached to a handle assembly 301 in the form of a Y which may be conveniently held in the hand, as illustrated by a series of dashed lines.
In Figs. 4u and 4b there are shown details of the means whereby the saturable pads such as 115, 116 or 115a or 116:1, may be attached to the jaws such as 107 and 108 of the clips such as 104 or 105.
Referring now to Fig. 4a there is shown a cross section laterally and vertically through jaws 107 and 108 of a clip such as 104, shown in Fig. l. The upper jaw 107 is perforated with many foraminae 120. Pad is in close contact with the lower foraminate surface of upper jaw 107 of a clip such as 104 so that any fluid seeping down from reservoir 101 through the openings 113 and 114 may saturate pad 115. When the jaws 107 and 108 are held together, pad 116, attached to lower jaw 108, becomes saturated due to contact with pad 115. Pads 115 and 116 may be clipped to the jaws 107 or 108 by means of U shaped clips such as at 401 which hold the pad, for example 115, against the jaw, for example, 107. It can be seen that clip 401 or 402 might be readily made from a thin resilient U-shaped piece of material with a slight spring to the upright members of the U` such as 404 and 405. The material should preferably be corrosion resistant.
In Fig. 4b there is shown an alternative arrangement to that illustrated in Fig. 4a wherein the jaws suoh as 107 and 108 of the clamp such as 104 are fabricated as shown at 407 and 408 to include grooves 403 and 406 into which pads 115 and 116 respectively, may be forced. By the use of the means illustrated in Figs. 4a and 4b, when pads 115 and 116 are worn they may be easily replaced.
There has been shown herein a novel acid wire stripper and neutralizer assembly which lends itself readily to the rapid removal of the enamel insulation coating of copper or other electric wires so that good contact may be made to the bare wire.
It will be clear to those skilled in the art that there are other ways by which a wire stripper, according to this invention, may be made within the scope of the above disclosure and the appended claims.
What is claimed as new is:
1. An enamel stripper for enamel-coated wires comprising the combination of iirst and second corrosive uid resistant containers, each having a dispensing end including a perforated washer at said dispensing end; rst and second alligator clamps, each having, respectively, mating upper and lower jaws operably held together in opposing relation by resilient means attached thereto; one of said jaws of each of said clamps, respectively, having an integral threaded cap, said cap being perforated in the surface in common with said jaw and adapted to receive one of said containers, respectively, by the dispensing end thereof and to hold said dispensing end in a sealed relation to said cap therein; each of said jaws of said clamps, respectively, having a saturable pad removably attached to the mating surfaces thereof; and a handle both said handle and said alligator clamps being attached together in au operable relation, the handle forming the vertical of a Y and the alligator clamps forming the upper diagonals, respectively, of the Y, to permit the operation of said padded jaws of said clamps against the urge of said resilient means by the thumb when the handle is held in ones hand, said lirst container having a corrosive fluid and said second container having a neutralizing fluid, said uids being dispensed through the perforations of said washer and said cap and said jaw of said clamp in common with said cap to saturate said pads in opposing relation and held together by said resilient means, whereby enamel coated wires may be inserted between said pads of said first alligator clamp to remove said enamel with said corrosive uid, and thereafter between the pads of said second alligator clamp to neutralize anycorrosive fluid remaining thereon.
2. The stripping device dened in 'claim 1 wherein said one of said jaws of said yalligator clamps is the upper jaw thereof.
6 References Cited in the le of this patent UNITED STATES PATENTS Jennings Aug. 16, 1932 Plumely et al Aug. 15, 1944 Love Oct. l5, 1951 Smith Jan. 13, 1953 Greenberg Apr. 16, 1957 FOREIGN PATENTS Switzerland Dec. 16, 1952