US502933A - Dental bracket - Google Patents

Description

(No Model.) '2 Sheetsuheet 1.

E. R. P ETTIT. DENTAL BRACKET.

m. 2M. w, N @y Patented Aug. 8, 1893.

UNITE-D ASTATI-:s

PATENT OFF-ICE.

ELIHU R. PE'ITIT, OF PHILADELPHIA, PENNSYLVANIA.

DENTALu-BRACKET.

SPECIFICATION forming part of Letters Patent No. 502,933, dated August 8, 1893.-

Application iiled December 31, 1889. Serial No. 335,536. (No model.)

To all whom it may concern:

Be it known that I, ELIHU R. PETTIT, a citizen of the United States, residing in the city and county of Philadelphia, State of Penn-- sylVauia,-have invented-a new and useful' Improvement in Dental Brackets, which improvement is fully set forth in the following specication and accompanying drawings.

My invention relates to dental brackets, and consists of a supportja rigid arm movably attached to, said support, an automatically operating eccentric in connection with said arm for locking the same in a horizontal position at varying heights, and an arm attached to said eccentric andsaid support.

My invention further consists of the ynovel construction of the table hereinafter set forth and claimed.

Figure 1 represents asectional perspective view of a dental bracket embodying my invention. Fig. 2 represents an enlarged sectional elevation of the automatic device and a portion of the bracket arm. Fig. 3 represents a perspective View of my improved table. Fig. 4 represents a cross-sectional view of the bracket arm. Fig. 5V represents a sectional elevation of a portion of the table and arm. Fig. 6 represents a modification of the arm. Fig. 7 represents a modilied form of the eccentric. Fig. Srepresents a perspective view of-a modied form of the bracket, showof the arm shown in Fig. 8. Fig. 10 represents a perspective view of a modified form of the bracket' showing a diiferent mode of applying the'locking eccentric. Fig. 11 represents a sectional elevation of a portion of the arm showing a modification of thelocking eccentric. Fig. 12 represents atransverse section on the line 0c, oo, Fig. 11. Fig. 13 representsa detail perspective view of the eccentric and attachment shownin Fig; 10.

Similar letters of reference indicate corresponding parts'in the several figures.

Referring to the drawings: A, designates a support adapted to be attached to the wall or other place of securement, and formed with apertured ears c, to receive a mainvertical post B. Said post B has movementin said ears a, and. is provided v with two cross-bars C, connected by uprightsD, upon which are 'pivotlally mounted the armsE of ayoke F, attached to an arm G, constructed either of tubing, as shown in Figs. 1, 2 and 4, or of a solid bar, as shown in Figs. 6 and 10, and in the-latterinstance, the locking device will be applied to the lower part of the outside of the bar. The yoke F is connected to the arm G, and to said latter arm is attacheda round or angular slotted bar H, the outer end of which is pivoted in the tubular arm G, or substitutedlbya rigid support on the outside of a solid jarm, as shown. Screws J and K, Figs. 1, 2, and 4, engage bearing plates L, located on the upper and lower sides of the said bar H., The screw J is set so that the horizontal position ofthe slotted bar H will be changed or slightly moved at an angle to the horizontal, to permit the eccentric N, to take hold and prevent the movement of the roller M within the slot, when the support is moved. The screw K is so adjusted that when the bar II rests upon it, the slot insaid bar is exactly horizontal, or at right angles to the bars D, D. It will be understood that a slight upward play of the arm H; is allowed by setting the screw J, to permit the said arm to slightly rock, the degree of adjustment being reguvlable as desired. ing the arm directly connected to the support. Fig. 9 represents aside elevation of a portion Within the sloto-fthe bar l-I, is mounted a roller M-connected to a locking eccentric N by a yoke P, or its equivalent, the said eccen- `tric having a square, angular or an ovalfopening Q, shown in Fig. 7, the said opening being slightly vlarger than an axle R1 passing therethrough, and to which the yokeP is attached. The eccentric Npis arranged at an angle to a Vertical plane, andthe opening Q therethrough is substantially at a right angle to the yoke P. The said opening being slightly larger than the said yoke, allows the latter to bear against the walls of said openings, and move the eccentric to overcome the resistance of a spring Y connected to the lower -portion of said eccentric N, when it is desired to lower the arm G. The forward end of a yoked arm S, is connected to roller M, extending through a slot T, cut through the arm G, and the opposite end of said arm S is pivotally connected to the post B. The outer end of the arm G is formed witha socket or opening U, Fig. 5, in which is movably mounted a stud or post V secured adjacent to the inner end of a table W. The said table W is dividedinto a large compartment W for the reception of tools or instruments,andintosub-divided compartments W2, in the rear of compartment W for the reception of gold and other materials for filling teeth, dsc. One side of the table is formed with a Veshaped receptacle or holder X, hinged at its lower part, to which is secured a board X of the table, the said receptacle being adapted to be folded back into a recess into the table. Said receptacle X is preferably formed with a series ot' holes for the reception of drills and other instruments for use with the dental env eine.

a To secure the receptacleX in a folded position against the table, a springor other suitable catch Yis attached to the receptacle and engages the table.

As shown in Fig. 2, a small lever Y2 is secured to the arm G, one end thereof working through an opening to bear against bar II, to hold the latter in a horizontal position, when a more rapid downward movement is desired, said device being operated by the thumb and one finger, to hold the said bar H down until the lever is released. When the arm G is raised, the free end of the slotted bar II descends slightly, and rests in a horizontal position on the lower plate L supported by the screw K. The arm S draws backward on the roller M, and drawing on the yoke P, moves the section N out of its locking position, and has a free movement in this direction. It will be understood that the eccentric N is drawn back by the yoke P, against the resistance odered by the spring Y', which latter spring always tends t0 draw the eccentric into a locking position.

To lower the arm G, it is only necessary to support its weight with the hand, so that the slotted bar Il will rest upon the lower plate L in a horizontal position, when a slow downward movement of the hand will cause the arm G to descend, so long as the movement is not suiiiciently rapid to change the slotted bar H from the horizontal. By suddenly removing the hand supporting the weight, the latter will instantly cause the bar II to change from its horizontal position, and the eccentric N will clamp and hold the bar firmly in position, with only an extremely small additional movement downward, depending upon the position in which the. screw J has been set. It will be seen that the arm G can also be moved 1aterally by the pivotal connection of the post B with the supports A.

In Figs. S and 9, the bar G is shown slotted, as at G', and the use of the bar 1I is dispensed with. The eccentric N is employed alone and without the roller M and yoke T,

the arms S being connected to each side of said eccentric and to the uprights D of the bracket proper. In this instance the coiled spring Y is connected to the eccentric N, and one ofthe arms S, and said eccentric has a sliding movement in the arm G as the latter is elevated and lowered.

In Fig. lO, a post B and supports A are used without the uprights D and cross bars C. The arm G has a lower bracket G2 secured thereto to form a slot therewith, in which slot is mounted the eccentric N attached to a yoked arm S, said arm S being movably Iixed to the post B, and having the the spring Y connected to one portion thereof and to the eccentric N. In this instance, the eccentric has a sliding movement when the arm G is raised or lowered, and a rod N is attached thereto for unlocking the said eccentric when lowering said arm G.

In Figs. ll and v12 the arm G is shown formed with a horizontal slot G', and a vertical slot G3 at a right angle to said slot G. `The eccentric N is formed with a slot N2, to provide a bearing N3, which is surrounded by a loop S', formed with the end of a single arm S, adapted to be attached to apost B. In this instance, the eccentric N has a sliding movement in the slot G.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a dental bracket, a support, a rigid arm' movably attached to said support, to

have a vertical and lateral adjustment, an automatically operating eccentric in connection with said arm, for locking the same in a horizontal position at varying heights, and an arm Sattached to said eccentric and said support, substantially as described.

2. In a dental bracket, a support, a rigid arm supporting a table movably attached to said support, so as to be adjustable laterally and vertically, a slotted bar mounted in said arm, an automatic locking attachment located in said slotted bar, and an arm movably secured at its ends respectively to said locking attachment, and to said support, substantially as described.

3. In a dental bracket, an adjustable arm supporting a table, a bar connected to said arm, an automatically operating locking attachment carried by said bar, and screws engaging opposite sides of said bar, for adjusting the same, substantially as described.

4. In a dental bracket, an adjustable bar `attached to an arm supporting a table, combined with a locking device consisting of a locking eccentric, a roller attached to said eccentric, and an arm attached to said roller, and to the support of the bracket, substantially as described.

5. In a dental bracket, an arm supporting a table having` a lateral adjustment, a slotted har adjustably attached to said arm, a locking device mounted in said bar, and an arm IOO IIO

Secured to said locking device aud pvotally ing au outside ap or strip adapted to be attached to a support, substantially as delockedagainst the side of the table, substanzo Scrbf. b1 d tially as described.Y

6. ta e for dental purposes provi ed f with a V-shaped hinged piece attached to one ELHIU R' PETTI F' side thereof; having apertures therein for Witnesses: tools, and adapted to be folded back in a re- JOHN A. WIEDERSHEIM, cess in said table, said V- shaped piece hav- WM. C. WIEDERSHEIM.

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