Improvements in dental clamps / [Daniel Murlless].

  • Murlless, Daniel.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in dental clamps / [Daniel Murlless]. Source: Wellcome Collection.

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    i\° 2764 A.D. 1807 Date of Aoolication. 2nd Feh.h 1897— Accepted, 3rd Apr., 1897» COMPLETE SPECIFICATION. Improvements in Dentists’ Clamps. I, Daniel Murlless, of Taber’s Block, High Street, in the City of Holyoke, County of Hampden and State of Massachusetts, one of the Unites States of America, Gentleman, do hereby declare the nature of this invention, and in what manner the same is to be performed, to be particularly described and ascertained in 5 and by the following1 statement:— This invention relates to clamps more particularly known as “dentists’ ” clamps and more especially designated as “ rubber-dam ” clamps, and the object of the invention is to provide a device of this character whereby the rubber dam can be quickly and easily placed in position and can be used by making only a small 10 aperture therethrough, and whereby also the device will not tear nor enlarge the aperture in the rubber dam while it is being placed in position. In the drawings accompanying and forming part of this specification. Figure 1 is a view showing one form of this rubber-dam clamp, being secured in position on a tooth by the usual forceps. 15 Fig. 2 is a top view thereof, in position on a tooth. Fig. 3 is a view with the clamp removed and the rubber dam in position on a tooth. Fig. 4 is a view of one form of this clamp, showing the same holding the rubber dam on a tooth to enable the operator to secure it in position by the usual thread. 20 Fig. 5 is a view at right angles to that shown in Fig. 4. Fig. 6 is a transverse sectional view taken in line a—a, Fig. 5. Fig. 7 is an under side view of this form of clamp. Fig. 8 is a top view of another form of clamp, holding a rubber dam in position on a tooth. Fig. 9 is a side view thereof. Fig. 10 is also a side view thereof at 25 right angles to the view shown in Fig. 9 ; and Fig. 11 is a view of a rubber dam, showing the size of aperture necessary in order to use the same in connection with this particular construction of clamp. Similar characters designate like parts in all the figures of the drawings. In practice it has not only been found extremely disadvantageous to place the 30 rubber dam around a tooth in the usual manner, but it has also been found necessary to make a relatively large aperture or perforation in the rubber in order to stretch the same around the tooth, so that the rubber dam oftentimes affords no protection to preveut spittle or other moisture reaching the cavity. In order, therefore, to overcome these serious disadvantages, I have provided an improved 35 clamp whereby the rubber dam can be inserted in position on the clamp before the same is placed on a tooth, or the clamp inserted and the dam stretched over the same and guided thereby into its proper position, and which is a comparatively easy matter as compared with the insertion of a rubber dam directly around the / tooth in the usual way, and whereby also the necessity of forming a large hole in 40 the rubber dam is obviated. In the preferred form thereof herein shown and described this rubber-dam clamp in one construction thereof comprises two inwardly-curved, substantially semicylindrical or concavo-convex members 10 and 11, having inwardly bent or curved concavo-convex, lower edges, thereby forming beveled exterior faces 12 45 and two clamping edges or jaws 13, adapted to engage a tooth. The members 10 and 11 have their upper portions cut away or tapered inwardly and preferably [ Price 8ii. [