Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1143443 A
Publication typeGrant
Publication dateJun 15, 1915
Filing dateMar 30, 1911
Priority dateMar 30, 1911
Publication numberUS 1143443 A, US 1143443A, US-A-1143443, US1143443 A, US1143443A
InventorsAdolph W Schramm
Original AssigneeElectro Dental Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1143443 A
Previous page
Next page
Description  (OCR text may contain errors)




Patented June 15, 1915.




Patented June 15, 1915.

407a $7515 Mags- 2 SHEETS-SHEET 2.

' mas-gas.




To all whom it may concern:

Be it known that I, ,ADOLPH W; SCHRA M, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Instrument-Tables, of which the following is a specification.

One object of this invention is to provlde a table especially adapted for use of dentists and surgeons, Which shall be of such a con struction as will permit of its being'conveniently made and kept aseptlc; its, parts being permit of this operation. p

It is also desired to provide a table of Y the character noted which shall be convenpositions.

. ends are secured ject of this invention; Fig. '2, is a perspec- Y tive view of one of the drawers; Figs. 3, and- 4 are fragmentary perspective views of "a, part of the main table frame, and a part of glass retaining frame respec- I and Figs. 5 to 8 inclusive are vertical Anotherobject of-the invention is to provide an instrument table with novel means for reinforcement of the table structure which means shall also serve as 'a rack for holding the instruments in place.

' i These objects and other advantageous as hereinafter set forth reference being had to the -.accompanying drawings, in which g igure 1, is a'p'erspective view. of the improved instrument table forming the subthe removable tively, sections of the table, illustrating the detail I construction thereof.

In the above drawingsl represents --a, bracket casting particularly f designed for attachment to the vertical standard of a dental engine,

may be connected to other supporting structures without in any way ,departingfrom the'invention. r

Specification of Letters Patent.

made to be easily separable, few number, and of convenient proportlons to Y it extends under it from although it isobvious that it Patented June 15, 1915.,

r Application filed March 30, 1911. Serial-No. 617,897.

For the to such a structure as that noted, it is provided with a pair of clamps 3 and 4 of anpurpose of attaching this bracket nular form, each made in halves hinged tonarrow elongated plate, and in the present instance has rigidly fixed to it a rectangular frame 9; thearrangement being such that acrossthe middle of this frame, dividing it into two elongated rectangular parts. 4

As shown in Figs. 4 and 8,-the long edges of the frame casting 8 and the opposite edges ofv the main frame 9 are channeled or' slotted to receive the outwardly extending flanges 11 of the drawers 10, hereafter described; these slotted members 9* of the main frame being made substantially 'U-.

shaped in section for this purpose, while the endmembers 9 are preferably solid strips or bars.

Asshown'in Figs. 5 to 7 inclusive, the underside of the frame casting 8 is provided with four stops12, two at the opposite ends of each long edge, and these are formed as wedge shaped structures increasing'in thickness inwardly fromthe ends of the said casting, their thickest portions being preferablyundercutat the end. The top of the table is formed by a rectangular. glass plate 13 of substantially the same shape'as the main frame upon which it rests and of 'a size large enough to extend at least to the vedges of said frame; there being a removable-holding frame 14 provided for the purpose of retaining. the glass top in position and forming a ledge around the edge of the table to prevent articles rolling off the same..- This holding frame is rectangular, in form and is made of heavy sheet metal bent into; a substantially U'-shaped section, one side of which, however, is of considerably greater 'lengththan the other,

so t at while its short inner side rests u on and projects above the surface of the grass top, the outer and longer side extends downwardly beyond the ends and sides of the glass top, fitting closely around the main frame.

It is to be noted that this retaining frame is made of such design that the dust falling on the glass, even though it works'under said frame and over the edge of the glass, will fall clear of the drawers. This is a most. important and valuable feature of the invention, as the instrument's'in the drawers, and more particularly the gold used for filling teeth, must be kept free'from dust.

As a result'.'with the "construction described, the edges of the glass" are completely covered and the holding frame with this top is firmly heldto thelmain frame] merely by raising the At the same time, holding frame 14', the glass top s released and may be removed for cleaning or any other purpose without permitting the dust;

' In order; the holding" frame, its "side; and end members are slotted adj acent' theirupon it to fall into'thedrawers,

to strengthen points of junction and li'ave mounted, in

are made of relatively stifi metal, brazed or These rei forcing angles are so designed that they project above the top of the holdholders for instruments whichmight other; wise roll efi the table or be .difiicult to, pick up.

drawers, the present instance, are


' of elongated rectangular-form and are made f ablyi sheet metal-having side flanges 11 whereby they are slidably mounted in the main frame of thetable. At each end of each, .drawerfis pivotally" mounted a pref- U -shaped ,handle 17 preferably of heavyw re {or light rod material, movablyheld in; place by trunnion screws 18 mounted in openings 1n the sides of the drawer and-rigid1y held in place bynuts 19; the side arm'sg'lof the handles being, provided with openingsfor the reception of the 03 lindrical unthreaded ends of, these screws.

IOn'ejaiiinffof each handle is extended be--- yondh the' s'c'rew pivot, as indicated at 20,

, and carries jajpin21 which-extends into an -open1ng;-22; 1n

' I: .urall y' overbalance the arm the side of the drawer, the sayithree times that oi the pi'n. Thej design of the handles is such that their front and main -portions'nat- 20 so that this is, ma] tamed} in such a position that-its" pin-21'-rests upon the highest point of the opening 22. The walls of said opening thus 1 form stops for" the handle, keepingitsfront portion ,fr om-v sired position and likewise preventing, said portion from them reinforcing corner? angles '16 which soldered to the hiettrlofthta holding frame;-

falling 3 below a certain,. de-

being lifted or raised to an:

abnormal extent. .The upper surface 01 each of the extended arms 20 is notched at 23, usually-adjacent its outer end, and ,the mounting; of the'handles is such, that this notch gis cawpable-ofengagement with the wedge shaped undercut end of one of the stops-"12 on the main frame casting. Thus when one of the drawers is pushed inwardly on its supporting slideways formed by the frame casting8 and the main frame structure '9, the end 24 of one of its arms, engages with the stop 12 at one-side of the frame. structurelso that thejfront or projectingpart of the :handle 17 is raised.

the grasping oi either of the handles, ac

companied by, a slightfupward movement thereof, turns it on its. trunnions or pivots and thereby lowers itslnotched arm 20"so that as-the drawerjis pulled out, said am clears jtheisto'p 12. The outward movement ofsaid drawer is limited by the flatend of 'theext'ended' arm 20 of the second handle, striking the stop 12 which was first cleared by y the other handle. drawer be pushed inwardly, the notched portion of this same arm engages the stop 12 to which it is adjacent in the closedposition and prevents the drawer from, mov--; ing out from under the opposite side of-the.

If now the table. The grasping of the second handle and the moving to it upwardly, causes this I notched arm to similarly release its stop,

so that' the drawer may be moved outwardly from the opposite side of the table and is limited as to its movement by the engagement of the end of its other handlewith one of the stops 12. ;v

From the above it will be seen that both drawers maybe projected from either s ide of the table to a predetermined wide open mwardlyffrom either side to a predetermined closed -posi. i0n in which it is automatically flocked from all. movement in either direction; It is obvious that'either the stop 121;. there. thus being -nothing-to osition and eitherof them, may be moved? prevent said drawer being completely moved 1 from the tables 'Byfina, spindle g6;

" conical form, agreater or less retardatie 1s r the tab 'eon'its bracket'l',-and

provide; against the accide said table'from' said bracket, 1 provide the spmdle 6- with an annular recess 6 and kmgth 11' It in he as. 5 and the provided tofthe revolution of I order to tal removal of niaaaee mount in the side of the boss 5 a set screw 5 in such position that its end enters said recess.

With the above described arrangement of parts it will be seen that any dust or foreign material collecting on the glass top is prevented from entering the drawers, since it extends completely over said drawers to the edges of the main frame upon which it rests. In order to separate the instruments in the drawers, I provide in these latter corrugated holding strips 25 of such length that they tightly fit between the side members of said drawers, serving also to properly support surgical and other instruments above the bottom of the drawer.

I claim 1. The combination of a table with a drawer therefor; supporting means for the drawer permitting it to be projected on opposite sides of the table; with means for limiting the amount of projection of said drawer on either side of the table, said means including a device for automatically locking the drawer .in its closed position.

2. The combination of a table with a drawer therefor; supporting means for the drawer permitting it to be projected on opposite sides of the table, said supporting means having stops with independent devices for limiting the amount of projection of said drawer on either side of the table, each of said devices includingv a member placed to cotiperate with one of the stops to lock the drawer in its closed position.

' 3. The combination of a table with a drawer therefor; supporting means for the drawer permitting it to be projected on opposite sides of the table; means for locking said drawer under the table including independent devices for limiting the amount of projection of said drawer on either side of the table.

4:. The combination of a table having 5. The combination of a table; a drawer mounted thereon; andmeans for holding the drawer in its closed position, the same consisting of fixed stops on the table and pivotally mounted handles on opposite ends of the drawer, each formed and mounted to engage one of said stops to automatically lock to said drawer in its closed position and to engage the other stop to limit the outward movement of the drawer.

6. The combination. of a table; a drawer therefor; a handle pivoted to the sides of the drawer and extending across the front thereof, one side of said handle having a notched portion and being retained in a stop engaging position under the action of gravity; and a stop on the table placed to be automatically engaged with the notched portion of said arm when the drawer is moved to its closed position to lock it therein.

7. The combination of a table; a drawer therefor; two independent locking devices on the drawer; and two stops on the table both placed to coiiperate with either locln'ng device to limit movement of said drawer between a closed position and two open positions.

8. The combination of a table; a drawer slidably mounted on the table so as to be capable of projection on opposite sides thereof; a handle at one end of said drawer; and two stops on the table; one of said stops being placed adjacent one side of the table in position to engage the handle to normally prevent projection of the drawer from its closed position in one direction, and the other stop being placed adjacent the opposite side of the table in position to also engage said handle to limit the possible projection of the drawer in the opposite direction.

9. The combination of a table; a drawer slidably mounted on the table so as to be capable of projection on opposite sides thereof; two handles at opposite ends of the drawer; and two stops at opposite sides of the table, respectively placed to he engaged by one handle to prevent projection of the drawer in one direction and also by the other handle to limit the movement of said drawer when moved in the same direction.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2738244 *Oct 9, 1953Mar 13, 1956Ferguson Thomas BCombination table and auxiliary table support
US2885694 *Aug 30, 1954May 12, 1959Cincinnati Metalcrafts IncDrawer construction
US3082050 *Dec 13, 1960Mar 19, 1963Baxter Arthur FPortable cabinet
US4178049 *Jul 10, 1978Dec 11, 1979Lyon Metal Products, IncorporatedShelf box with dual pivoting stop mechanism
US4632410 *May 30, 1985Dec 30, 1986John F. BainbridgeCombination tool caddy and stool
US5120117 *May 24, 1991Jun 9, 1992Williams Chauncey LComputer support platform
US7895955 *Mar 15, 2007Mar 1, 2011Ft Products, LlcShelf system
US7901723 *Aug 31, 2004Mar 8, 2011Restaurant Technology, Inc.Food tray
US8757458 *Oct 18, 2010Jun 24, 2014Lippert Components, Inc.Storage box with slide out storage tray
U.S. Classification312/246, 312/286, 312/209, 312/229, 108/26
Cooperative ClassificationA47B2088/0403, A47B88/0407, B60N3/083