Патент USA US2131297код для вставки
Sept. 27, 1938. 2,131,297 O. H. P‘IEPER CORD STRAIN RELIEF MEANS Filed May 31, 1935 2 Sheets-Sheet 1 fave/aim": 05662?“ H ?'cjoa? 9% MW awlww, Sept. 27, 1938. o. H.1PIEIPER - _. 2,131,297 CORD STRAIN RELIEF MEANS Filed May 31, 1935 2 Sheets-Sheet 2 ‘2,131,297 Patented Sept. 27, 1938 UNITED s'rArss PATENT oFFicE 2,131,297 CORD STRAIN RELIEF MEANS Oscar H. Pieper, Rochester, N; Y. Application May 31, 1935, Serial No. 24,32’? 6 Claims. (Cl. 32*22) This invention relates to securing devices, and a cord may be inserted into the securing means by a simple downward movement as a natural continuation of the act of withdrawing the cord from the unit. It is also an object to- provide improved cord securing means of simple and in- ‘ expensive construction and neat appearance. Further objects and advantages of my invention will appear from the detail description. ' has to do with means for holding cords or analo gous members attached to instruments associated with a dental unit or the like, in such manner as to facilitate freedom of use of the instruments. It is known to provide dental units comprising a plurality of associated instruments, some elec trical and some compressed air, to which are attached ?exible cords which pass downward into 10 the column of the unit and have associated there In the draw.ings:— with tension means, commonly Weights, which tend to hold the cords retracted within the col umn while permitting withdrawal of the cords in the use of the instruments. This arrange 15 ment, while possessing many good features, is 20 v Figure l-is a fragmentary isometric side view 10 of the upper portion of a dentalunit embodying my invention; ' , Figure 2 is a side view, partly broken away and in section, of a dental unit embodying my invention, showing one of the instrument cords . ' open to the objection that the tension to which withdrawn and secured by the clamping means, a Withdrawn cord is subjected interferes with the freedom of use of the instrument attached certain of the instruments being omitted for clearness of illustration; Figure 3 is a front view of the clamping means to that cord. In my Patent No. 1,694,669, issued December 11, 1928, I have disclosed, in conjunction with a unit of the type above referred to, means for securing a withdrawn cord in such manner that the por tion of the cord outward beyond the securing 25 means is relieved of the pull of the tensioning means, the pull being exerted upon the remainder only of the cord and the securing means, so that freedom of use of the instrument attached to the cord is not interfered with. The securing means 30 is in the form of spring clips which extend sub-v stantially horizontally and transversely of the and the associated supporting bracket therefor; 20 Figure 4 is a section ‘taken substantially on line ILA‘ of Figure 3, parts being broken away; Figure 5 is a view similarto Figure 3, but with the housing casing of the clamping means re moved; and g ' > 25 Figure 6 is a back View of the clamping'means casing. . _ I have shown my invention, by way of example, as applied to the dental unit disclosed in my co pending application for Dental unit, Serial No. 30 5,947, ?led February 11, 1935. It will be under column of the unit. These clips have proved to ‘ stood, however, that my invention may be ap be highly e?icient ‘for holding the instrument plied to any other suitable dental unit. ' cords, but, due to their disposition, it may be 35 necessary at times for the dentist to use both hands in Withdrawing a cord and inserting it into the clip. This is inconvenient, and at times. may be objectionable, since there may be frequent instances when the dentist does not have both 40 hands availablev for inserting the cord in the clip as, for example, when he is holding another in strument in the patient’s mouth. Also, clips of this character are not well adapted for use with units in which the instrument cords pass through 45 a block or the like, which projects above the top wall of the table top of the unit column. The instant invention is in the nature of an improvement over that of my above patent. It is directed to the provision of a dental unit hav 50 ing cord securing means associated therewith in 55 such manner, and of drawn cord can be means with facility use of but one hand. vide securing means such character, that a with inserted into the securing and, if necessary, with the A further object is to pro so related to the unit that. In Figures 1 and 2 of the drawings, I'have shown a dental unit comprising a hollow column 35 it! provided at its upper end with a downwardly and forwardly inclined ‘table top H in which is mounted an instrument block 52.’ This block l2, which may be considered as part of the table top, is provided with suitable openings, through which pass ?exible cords, which are attached, in a known manner, to instruments seating in ap propriate recesses or sockets formed in block l2. The instruments mounted in the block maybe a hot air syringe :4, hand pieces or switch handles i5 adaptedto receive in their upper ends suitable electrical instruments, and an air cut~ 01f nozzle 96, of known type, adapted for quick attachment to atomizers. It will be understood that the cords attached to instruments It and it, which cords are not shown, are in the form of rubber tubing or air hose, and are connected to a suitable source of compressed air, and the cords attached to switch handles l5, one of which latter cords is shown and identi?ed by reference 55 2 2,131,297 number l3, are electrical cords connected to a tion of a cord I3 downward between arm 25 source of electrical energy; as is Well known in and the side wall 26 of the casing with facility. Casing 22 is preferably disposed at the mid length of block I 2, with the cord clamping means, comprising arms 25 and side walls 26 of casing 22, in substantial alignment with the switch han dles l5, since these latter are the instruments most frequently used for any considerable length the art. > The air hose and the cords l3 have associated therewith means for urging them inward of col umn I6, so as normally to retain the air hose and the electrical cords retracted and the instru ments seated in block 12, while permitting with drawal of the cords and the air hose in the use of the instruments. In the embodiment of my invention illustrated by way of example, each air hose and each cord i3 passes about and beneath wheel ll of a pulley and weight member £8. The other end of each air hose and each cord 13 is 15 suitably anchored within column M, as is well known in the art, and members I 8 maintain them under tension effective to return the air hose and the cords to retracted position and- hold the associated instruments seated in block l2, 20 while permitting withdrawal of the air hose and cords in the use of the instruments. A bracket I9 is suitably secured, as by screw means, to a lug !2a of block [2. This bracket is shaped as shown, and comprises an upwardly 25 projecting arm 20 carrying, at its upper end, an integral flat plate 2! of rectangular shape, which of time. In use, the selected switch handle, with its associated instrument, is removed from block 10 i2, the attached cord l3 being withdrawn from column In to the desired extent. The cord l3, as withdrawn, extends slightly above and adjacent the clamping means, as indicated by the position of cord l8 shown in dot and dash lines in Fig 15 ure 1. Cord I3 is then swung downward, as a natural continuation of the withdrawing opera tion, as indicated by the dotted arrow (1 of Fig ure 1, so as to be inserted between one of the clamping arms 25 and the adjacent side wall 26 20 of casing 22. During this operation, which may readily be performed with one handyif desired, the upper projecting portion of arm 25 serves as a guide for the cord. After the cord contacts the upper portion of arm 25, it may be pulled later 25 ally so as to move the arm away from the eas plate is disposed substantially vertical, projects ing,‘ facilitating entry of the cord between the above the table top of column ID, and extends arm and the adjacent casing wall, if desired. transversely of and in substantial parallelism with The tension of spring 30 is such that cord [3 is 30 the front wall of the column if). A box-like or effectively clamped between arm 25 and the side 30 namental casing 22 is mounted upon plate 2| in wall 26 of casing 22, so that the pull of the cor-d a suitable manner, as by means of screws 23 tensioning means is taken by the clamp and the passing through plate 2!; and threading into portion of the cord disposed inward of the clamp, bosses 24 projecting rearward from the front wall the portion ofthe cord disposed outward beyond 35 of the casing. The top and the side walls of cas the clamp being relieved of tension for freedom ing 22 ?t snugly about the top and the sides of of use of the attached instrument. plate 2| and facilitate accurate positioning there As a general rule, the instruments l4 and I6, on of the casing. Bosses 24, in addition to re ceiving screws 23, also serve to space the front 40 wall of casing 22 the proper distance from plate 2|. Casing 22 is preferably formed as shown, but may be of any other suitable or preferred construction. at the ends of block l2, are only used momen tarily, and it is not ordinarily necessary to re lieve the air hose attached to these instruments 40 from the pull of the tensioning means. How ever, if desired, or in exceptional cases, the air hose attached to either of the instruments l4 and The upper corners 22a of casing 22 are pref i6 may be inserted into the clamping means so as to be held thereby, in substantially the man 45 25, disposed adjacent side walls 26 of casing 22, ner above described with respect to the electrical are pivoted, adjacent their lower ends, on pins 21 cords l3. This operation is obvious and need extending from front to back of the casing and not be described in detail. suitably secured in bosses 28‘formed integral with In order to release a cord l3 from the clamping means, it is only necessary to pull the cord up 50 plate 2| at the lower corners thereof. The for ward portions of these pins seat in bosses 29 ward, and if desired laterally away from cas formed integral with the front wall of casing 22, > ing 22, until it passes from between arm 25 and at the lower corners thereof, aligned with bosses the side wall of the casing. 'The cord may then 28. The side walls of casing 22 terminate above be retracted within-the column I0, and the in 45 erably rounded, as shown. Clamping members 55 bosses 29, at 26a, to accommodate the clamp ing members, as shown. Each clamping member 25 comprises an arm 25a of approximately elon gated S-shape, and an integral ?nger 25?) which curves inward and upward within casing 22 from 60 the lower end of arm 25a. A tension coil spring 30 connects ?ngers 25b and yieldingly urges clamping arms 25a toward side walls 26 of casing strument returned to block I 2, by the cord ten 55 sioning means. This operation of releasing the cord and returning the instrument to block 12 may also be performed with one hand, when de sired or necessary. Obviously, an air hose- of either of the instruments I 4 and I6, if held by the clamping means, may be released therefrom 22, with which the arms 25 cooperate for clamp in the same manner as the above. While I have disclosed the clamping means of ing an electrical cord i3 inserted between either my invention, by way of example, as applied to 65 arm and the adjacent side wall of the casing. _ a dental unit to which it is related in a particu Casing 22 thus provides a housing for ?ngers lar manner, it is not limited to use with the par 25b and spring 30, and cooperates with arms ticular unit shown. In its broader aspects, my in 25 for clamping the cords I3. ' vention comprehends clamping means of the The upper portion of each arm 25 projects above the adjacent side wall 26 of casing 22, and is‘ curved upward and outward of the casing, laterally thereof, as shown. The rounded corner 22a of the casing 22 and the upper portion of the adjacent arm 25 thus de?ne a downwardly con verging passage 3l, which is conducive to inser character shown used with a suitable support for dental or like instruments having attached there to ?exible cords or hose having associated there with tensioning means. Also, the clamping means itself may be used for various purposes, as will be obvious. It will be understood, by those skilled in the 2,131,297 art, that changes in construction and arrange ment of parts of my invention may be resorted to, without departing from the ?eld and scope thereof, and I intend to include all such varia tions, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention is disclosed. What I claim is: 1. In combination in clamping means of the 10 character described, a box-like casing compris ing front and rear and side walls, clamping members adjacent the sides of said casing and cooperating therewith for clamping an article in serted between said casing and either of said 15 members, and means within said casing yield-ing ly urging said members toward said side walls of said casing. 2. In combination in clamping means of the character described, a box-like casing comprising 20 front and rear and side walls, clamping members disposed adjacent and extending lengthwise of the sides of said casing, and means within said casing common to said members yieldingly urg ing them toward the sides of said casing, said 25 clamping members cooperating with the sides of said casing for clamping articles inserted there between. 3. In combination in clamping means of the character described, a box-like casing comprising 30 front and rear and side walls, clamping members disposed adjacent and extending lengthwise of the sides of said casing and projecting above the latter, each of said clamping members being piv oted adjacent its lower end on an axis extending from front to back of said casing, and means within said casing yieldingly urging said clamp ing members about their pivots toward the sides of said casing. 4. In combination in clamping means of the 40 character described, a box-like casing compris~ ing front and rear and side walls, clamping mem bers disposed adjacent and extending lengthwise of the side walls of said casing exterior thereof, each of said members being pivoted adjacent its 45 lower end on an axis extending from front to back of the casing and each being provided with 3 an element extending upward and inward within the casing, and a tension spring within said cas ing connecting said elements and yieldingly urg ing said members toward said side walls of said casing. 5. In combination in a dental unit, a support ing column, an instrument supporting member mounted on the upper end of said column, dental instruments mounted in said member, ?exible cords attached to said instruments and passing upward through said column and supporting member in the use of said instruments, yielding tension means urging said cords inward of said column, a box-like casing mounted adjacent and in front of said supporting member with its top 15 wall thereabove for movement over said top wall of a withdrawn cord, clamping arms at the sides of said casing extending thereabove for con?ning the cord laterally of the casing during movement over the top thereof, said arms being movable at their upper ends toward and away from the sides of the casing in a plane substantially parallel to the front of said column, and means housed with in said casing for yieldingly urging said arms toward the sides of said casing. 6. In combination in a dental unit, a support ing column, an instrument supporting member mounted on the upper end of said column, dental instruments mounted in said member, flexible, cords attached to said instruments and passing 30 upward through said column and supporting member in the use of said instruments, yielding tension means urging said cords inward. of said column, a structure comprising a top wall and side walls mounted adjacent and in front of said 35 supporting member with its top wall thereabove for movement over said top wall of a withdrawn cord, clamping arms at the sides of said struc ture extending thereabove for con?ning the cord laterally of said structure during movement over 40 the top thereof, said arms being movable at their upper ends toward and away from said side walls of said structure in a plane substantially parallel to the front of said column, and means yieldingly urging said arms toward said side walls. OSCAR H. PIEPER.