US 1622910 A
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Description (OCR text may contain errors)
March 29, 1927.
J. HOMER DENTAL RELATOR Filed July 1.5, 1925 ATTORNEYS Patented Mar. 29, 1927.
curren STATES PATENT OFFICE.
JOSEPH HOMER, OF NEW YORK, N. Y.
Application filed July 13, 1925.
This invention relates to a dental relatoL- whom a new set of teeth is being made.
A further object is to provide an improvement on my Patent No. races-74:. 1ssued August 7 1923, entitled Dental relator.
A further object is to provide a simple and efficient metallic lining forthe plastic bearing member referred to in the above mentioned patent, so that in the operation of the jaws the pivot points will slide on metal and not on the plastic composition.
A further object concerns the provision, of a frame which is supported at three points and is adapted for movement at each of these points.
A furtherobject is to provide a frame which is provided. adjacent the three points of support with adjusting screws to limit the movement in certain directions.
A still further object is to provide a frame so formed as to permit the operator an unobstructed view of and access to the moulds on the frame.
The invention is illustrated in figures, of which- Figure 1 is a plan view of the device;
Figure 2 is a section taken on the line 2-2 of Figure 1;
Figure 3 is a plan'view of the upper cup;
Figure 4 is a section taken on the line 4-4 of Figure 2;
Figure 5 is a section taken on the line 55 of Figure 1;
Figure 6 is a perspective viewof one of the lining plates;
Figure 7 is a sectional view taken through one of the main bearing cups with a modilied form therein;
Figure 8 is a perspective view of the lininc: used in Figure 7;
Figure 9 is a section of the portion shown in Figure 7 taken in a plane at rightangles thereto;
Figure 10 is a perspective view of a slightlv modified form of lining plate to that shown in Figure 6.
In its general aspect. the invention comprises a main frame on. which the lower member of a pair of moulds for forming a new set of teeth is mounted. On this main Serial No. 43,366.
frame at the rear are provided two posts on the upper ends of which are bearing cups in which is disposed plastic material. In accordance with the previously mentioned patent of mine, this plastic material is adapted to receive the pivot members of the-movable frame carrying the upper jaw memben In accordance with. the improvement, I dispose within the plastic material the metallic plates or sleeves formed in anydesired manner, the pivot members of the movable frame adapted to bear on and slide in contact with such plates rather than moving directly in contact with the plastic material. This eliminates the wear on the plastic material. and preserves the form of the groove therein and also requires less skill on the part of the operator. A further feature comprises providing an additional cup containing plastic material and metal linings at the front of the main frame but at a much higher level than the level of the two jaw members and providing a portion of the movable frame with a pivot member to rest in this upper cup. Thus, the movable frame is pivotally connected to the main frame at three points. The movable frame is provided with adjusting screws adjacent the pivot point so that movement downward beyond a certain point is prevented.
As shown in the drawings, the preferred form of the invention comprises a frame having a base plate 10 and two pedestal posts. one of which is shown in Figure 2 and designated by the numeral 11. At the top of these posts are disposed bearing cups 12 and .13. Within these cups are disposed masses of plastic material 14-. and 15'. In this plastic material are disposed metal linins: plates 16 and 17 The form of the plates shown in Figures 1, 2. 5 and 6 is one preferred form. Slidable on these plates within the mass of plastic material are the pivot condvles l8 and 19 of a movable frame member 20. This movable frame member stands forward to form an upper movable plate 21 adapted to support the upper mould or jaw the lower one 23 of which is mounted on the plate 10. At the forward end of the upper plate 21. I provide a vertical extension arm 24 which extends upwardl v and forwardlv and is provided with a pivot member 25 adapted to depend into a cup 26 filled with plastic material 27 in a metal lining plate 28. this'cup being mounted on the upper forward end of an arm 29 tached. so
' which rises from one of the pedestal posts 11. The movable frame 20 is provided with set screws 30 and 31 adjacent the pivot members 1S and 19. These set screws are adapted to be adjusted with reference to hearing surfaces. one of which is indicated in dotted lines in Figure 2 and designated by the nu mere] 32. These bearing surfaces are connected to the main frame and form extensions of the respective pedestal posts 11. The lower ends of the set screr. s are lapted to bear on these surfaces to limit the move ment of the rear end of the frame 20. A setscrew 33 is mounted on 24 and bears on :the upper surface of the cup 26 to limit the downward movement of the pivot menr Fber-25.
As shown in Fig res 7. 8 and 9, I i provide a different lining; for the plastic in. terial in the cups. In these lip: res. the liningisshown in the form of an open erdeiil cylinder such as 3 1 into which the pivot end If desired,
d w h of the :movable frame extends. cylinder 8% could be closed at one o. out :departing from th spirit of the tion. The shape of these inthe plastic mate is 1 a path of movement to the as -.e of the movable frame ap roximately equivalent to the normal path of movement desired of the jaws.
In the operation of the device the dent st, knowing the general character of the w movement under treatment, selects the desired liningsand then inserts these lini the plastic mas-s, after which the pivot hers are brought intocontact wit the llllll;
and manipulated until the lie has a sumed in the plastic mass the desn relative position, so'that as movable j member i smoved \backa-nd forth the i-esultin r movement will be as nearly as possible that desired of :the jaws. The fact that the pivot members are sliding on metal surfaces will g ve a'more positive. movement and will prevent wear on the plastic materal. The fact that the movable frame is provided with supports at three points will also permit more etiicient, simple movement and require less skill on the part of the operator. Frovision of set screws adjacent the pivot point will permit of the proper limitat ons beinc; put .upon the movement and will also permit of a very accurate aligning of the n'iovah e frame so as to properly re er the upper jaw with respect to the lower aw.
It is desirable to hold the laro e moulds. such as 22 and '23, on their respective plates, by providing; pins. such as and 36. stucl: into the jaw members and then passino; an elastic band 37 over the rear face of the plates to which the jaw members are atto hold the jaw members in position.
Preferably the members 16, 1'? and 28 are made of stiff or rigid metal, such. as aluminum or bronze but if desired, may be made of pliable or soft metal, such as tin foil or an alloy of load. In regard to the lining 8f. the same may be open at both ends as shown in Figure 8 or may be closed as shown 39; in l ij jure 0. Also the bottom of the linino' 341*. may be tapered instead of flat if "110d. These linings, as for instance, 16. is shown as formed to permit a 'qht movement of the upper fr-me but sired. they could be formed round as shown l6 in Figure ltl whereby a curved structure is presented ai'laptcd to peru'iit a moreinent in a curve which may he an arc of a circle or some other curve. so as to permit n'iovements more nearly equivalent to natural jaw movements. It w ll also be evident that the condyles l8 and 19 may have tapered ones to receive a face bow or they may be ade oval or round. It will also be understood that other modified structures or forms might be used without in any way deng from the spirit of the invention.
hat I claim as my invent on is: 1. In a dental relator a fixed frai a mova le f a me. said movable frame l avian" a pair vot members at the rear thereof mountplane above the teeth of jaws carried fitted frame, said movable frame also ine; a pivot member d sposed forwardly at a st rear pivot members, and bearing members carried by the fixed frame corr" iond ngzlv disposed thereon to cooperate with the pivot members of the movable frame. the two rear b airing}; mei'nbers being appreciably higher than the teeth mounted on .rai l stationary frame and formed as pockets open at thetop and one side while the forward hearing member is disposed above the rear hearing members and is formed open at the top, and a guidin lining: member positioned .in each socltet adapted to guide said pivot members as they swing and as they move baclt and forth during the functioning of the movable frame whereby jaws mounted on the respective frames can be examined and observed and n'ianipulated from the front of the device without difficulty.
in a dental relrtor a fixed fran'ie having: a base and a pair of posts. each of the po ts having at the upper end a pocket open at the top and one side, the open sides facing each ..e arm extending from one of said posts formed, w'. socket open at the top. said socl tet being: spaced substantially an c dit-itance from the other two sockets. movable fran'le havin a pivot n'icmhcr arranged in each of said sockets, and independently adjusted means arranged adjacent .h socket for accuratelv aligning the mov-- able frame in respect to the stationarv frame.