US 2483656 A
Description (OCR text may contain errors)
@efio 4,1, F. F. MARSGHALK 2g43 @5@ COMBINED PESTLE AND MERCURY DISPENSING APPARATUS Filed NOV. 19, 1.945
Patented Oct. 4, 1949 COMBINEDVP-ESTLE AND. MERCURY DISPENSING APLPKRKTUS FrddefimczFzfMansohalkieuglusta,EGa. ApplicatiofiNovexnberlm 1945,"SerialNo.629,364
This invention relates to acombined "pestle and dispensing means therefor.
"Here before it has 1: en 'comrn-on practice to provide amalgamo-enta lings'i'iy placin'g -a-snitable amount of'all-oy- ,l'l'lOItal and th'en add a quantity of mercery to the mortal enamel-gamation with the alloy in which the amalgamating-process was accelerated-p 1*the'use o apostle in-triturating-and mixing the materials.
' I have found that -'I canproceefi more *erpeclitiou'slyand* accurately by providing' a' reservoir for mercury wi'thin thharidlefif til-apostle.
It isan object or my invention to "provide a reservoir in the emale of a pestle including a valve oontrolledo-ispen'sing and measuring means to feed a quantityof' mercury flownover the elite of the pestle body into-the mortarand npon the alloy or metallic-mix avithin the mortar.
It is "an object-of my invention to provide pestle hanole with '--a removable capcomprising a flanged ring in combinationwvith-a stretchable diaphragm which "togethenmay-serve as a base for the*appariztuswvherby the apparatus stood an inverted upright'positionion-a "substantially horizontal support-when not in use.
It isan object of-this-inventionto provide an elastic flexible --diaphragm 'attacha'bly "and "detacha-bly secured-on the enclof the pestle handle by a fianged'ring.
It is -an-object of thisiinvention totprovide an attachable and detachable pestle body for the handle whereby 'anold worn-ont pe'stle"booy'may be replaced by a new one.
Titis an object of i this invention to provide a valve body that is springactuated 'to olose'd'gpo'sition by a spring 'andmanually .a'tcthaitedto an open position by"fin'ger=pressurei(m "a resilient flexible diaphragm.
It isan-ob-jeet of' my invention'to provide a receiving compartment for receivingthe memory from the Valve controlled res ervoir :and to 1 guide and conduct the charge of 1'nerc'urygravitationally down and over "an inclined portion of the pestle 'body' through an 'exit' located \at the bottom of'the inclined portion wherebythe charge of mercury is deposited in themo'rtar.
It is also 'aryobject of'tliis invention to make the pestle 'handle'of "substantially transparent plastic materiatwh'ereby the contents of the-reservoir-maybe'notedfromtime to time.
Other objects 'andadvantages willberevealed in connection withthedetailedldescription of-the accompanying Jdrawings v'vhich "form .a .part =01 the specificationand in which:
l'is'a'sectional view or my neWoiSpensing' pe'stle, taken oentrally an dlongitudinally thereof and showing 'the control valve "closed.
l 'ig fl is simila'r o' -Figfl" except thatthe control va lvelis-i 'epressecl positionafter thei'emercury, and
to $1 41 except that inerouryds being :oispen'sed withoiit being-measured. -IIh-'e-;dra-wings lea-re me-rely il lustrative :andnot definitive ?0f umy invention except as neen'ea hy the subject matter :elaime'd herein.
'I'he reference :oharacters identify the .pai'ts disclosed-in both-the drawings andispecifications.
@Imthedrawingthe pestle consistszof :a: hollowsi-ibstantially transparent handle 2. constituting a :reservoir'l3 -contain-ing: mercury 4.
'lSincethe contentsof the reservoiri-is to be visibly observed it will be. suflicient to usetranslucent materiali'f so desired.
"The fplastichandle may be made of molded phenolic "plastics, methyl methacrylate ,plasties, vinyl resin plastics, polystyrene plastics, acrylic resins, cellulose acetate, ethyl celliilosaetc.
The hanole- 2' isprovfded vvitha'cor'nbi-ned valve seat and valvwstemjguide "5. "The handle '2Iis provided with an"exten"sion 6"10'e'y0'n'cl the valve seat and receives one end 'of'apestlebody 7 which i'scleitaeha-blyse'cnreol hereinby any soft-able s61- iible iue li. The pestle mew 'i's'provi'ded with an inc lecl end *9 '--located with iifthe "extension 6. The extension t is-provided with an exit orifice" I'll unseat the lowest'portion of the inclineiiefid9.
Ihe tiarbiil'ar =extension 6 "of "the handle forms a oonnection Witht l'repestle "'1, said connection (tonstitiite's-a doint'atfd'the exit oi'i'fic'e ID is 10- eateddn the'connection"or ioint. The exit orifice mopens on the'outside ofthejpestleand conducts or guides the mercury over"theontside'"surface portion df the pestle-*1.
A valvestem I isprovided with a valveh'ea'd fi oooperating w-ith the valve seat and-'gui'de 5. Theivalveste-m l l -is also provid'clwith arecluced portion its conneoting *the *valve head with 'the remaindermf *the walve stem I. This reduced portion [3 forms a passageway from the reservoir 3' tofz'the compartment M. The upperend of "the valvestem l l is provided ith a-'remova-ble'-knob pretenaiblyi-serew threaded to 'the endofth'estem I l and. located substantially flush 'Wit-h the upper end ot the reservoir- 3;
:A 'flexibleelas" stretehab'le diaphragm [Ii-extendslover the top the-tubular reservoir in engagement with theflknobili and is s'ecureiito the reservoir-i3 :b y'? Thezvalvezstem 1S sorrounded by ahelioalcom- ;pressionispringg mipreterably made'ofcatbon steel or any suitable material that will not amalgamate with the mercury.
The valve stem II and the valve head I2 and the knob I5 may be made of substantially pure iron or any suitable material such as plastic material that will not amalgamate with the mercury.
If the valve stem II, the knob I5 and valve head I2 are made from a suitable plastic material, such as specified for making the hollow handle, then the plastic material for said valve stem etc. need not be made of transparent or translucent material.
The pestle body I may be made of porcelain or any suitable plastic material. The exit orifice III is formed in the connection or joint of the tubular extension 6 with the pestle I. The exit orifice I leads from a position above and at the lowermost portion of the incline or ramp 9 to the outer surface portion of the pestle I, so that the mercury can roll down or descend on the pestle into the mortar I9 without excessive splashing.
The mortar I9 is conventional and forms no part of my invention but is disclosed merely to visualize clearly the use and operation of my combined pestle and dispensing device or apparatus.
When the manufactured parts are ready for assembly the valve stem I I is inserted through the valve seat and guide and the spring I8 is placed in position surrounding the stem I I.
The spring I8 is depressed so that the knob I5 may be applied to the valve stem II to maintain the spring under tension. Now the stretchable diaphragm I6, which is preferably made of rubber, is placed over the end of the tubular hollow handle and secured in position thereon by the screw threaded flanged ring II. The pestle body I is detachably secured in place by a soluble cement or glue so that an old Worn-out pestle body may be removed by dissolving the glue in water or other appropriate solvent.
In operation the apparatus comprising the pestle is used in the ordinary way in connection with a mortar containing the dental filling alloy or mix. When it is desired to dispense a charge of mercury the valve is depressed by a finger tip of the operator as indicated in Fig. 2. If the release of a charge of mercury is not sufficient to make the amalgam of proper consistency a further charge may be added by repeating the operation of depressing the valve against the tension of the spring. If more than a measured charge is desired the pestle may be operated as indicated in Fig. 3. If it is desired to empty the reservoir 3 the valve may be maintained in an open position as clearly indicated in Fig. 3.
In Fig. 2 it is to be noted that the valve stem I I exactly fits the valve seat outlet and cuts off the exit of mercury 4 from the reservoir 3 so that the stem II serves as a sliding cut-off valvewhereas the valve head I2 operates as or similar to a poppet valve of an internal combustion engine.
It is also to be noted that the inclined end 9 of the pestle body I serves as a stop to prevent excessive range of movement of the diaphragm I6 as shown in Fig. 2.
When it is desired to place the pestle in an out of use position it may be inverted and supported in that position on a substantially horizontal support thereby using the ring H as a base.
While I have described my pestle as being particularly useful in connection with the dispensing of mercury over a pestle body it appears to bev self evident that it could be used for dispensing other liquids as well as powdered material.
Having fully disclosed my said invention what I claim is:
1. In a combined pestle and mercury dispensing means therefor, comprising a tubular transparent handle defining a mercury containing reservoir, said handle having a tubular extension receiving one end of said pestle, said pestle being glued in said tubular extension defining a joint, said joint having an exit orifice therein opening on the surface portion of said pestle, said handle having therein a valve stem and a valve head said head being connected to the valve stem by a reduced portion of said stem in combination with a combined valve stem guide and valve seat portion, spring means on said stem to actuate said valve head to closed position against said valve seat portion in further combination with a stretchable diaphragm secured over the end of said tubular handle by a screw threaded flanged ring, a knob disposed on the end of the valve stem and in contact with said diaphragm whereby said valve stem and valve head may be operated to release a charge of mercury from said reservoir on to the surface portion of said pestle.
2. In a combined pestle and mercury dispensing means therefor, comprising a tubular plastic substantially transparent handle said handle defining a mercury containing reservoir, said reservoir having adjacent one of its ends a transverse portion defining a combined dispensing opening, a valve stem guide and a valve seat, the upper end of said tubular handle being closed by a stretchable diaphragm, said diaphragm being secured in position by a screw threaded flanged ring, in combination with a valve stem having a valve head on one of its ends and a detachable knob on its other end, said knob being in contact with the diaphragm whereby said valve stem and valve head may be operated by finger pressure on said diaphragm said pestle having a fiat inclined upper end portion, said handle having on its lower end a tubular extension receiving said upper end portion of said pestle, including its inclined portion, in further combination with an exit orifice located above but at the bottom of said inclined portion and between said extension and pestle whereby said mercury may be conducted down over the outer surface of the pestle into the mortar without excessive splashing or spattering of the mercury.
3. In a combined pestle and dispensing means therefor, comprising a tubular plastic transparent handle said handle defining a reservoir for mercury, said handle having a transverse portion located intermediate the ends thereof, said transverse portion defining a combined dispensing opening, a valve stem guide and a valve seat, a valve stem having a valve head co-operating with said valve seat, said valve stem extending through said dispensing opening and valve stem guide, said valve and valve stemv being provided with operating means, in combination with a tubular extension on said handle located below said transverse portion and receiving the upper end of a pestle body, said pestle body having a fiat inclined upper portion to form a guide for the dispensed mercury, said extension having an exit orifice the major portion of said orifice being located between itself and the lowest position of said inclined portion, and leading from a position above but at the lower most portion of said inclined portion whereby mercury may be dispensed over an outside surface portion of the pestle body, said pestle body being detachably secured in said ex- Number tension by a soluble glue. 210,360 FREDERICK F. MARSCHALK. 576,992 862,630 REFERENCES CITED 6 1 3 5 3 The following references are of record in the 1,365,350 file of this patent: 1,970,193 2,203,089 UNITED STATES PATENTS 2,281,051 Number Name Date 10 2,331,672 56,063 Keep et a1 July 3, 1866 2,392,907
6 Name Date Rawlins Nov. 26, 1878 Hayball Feb. 9, 1897 Garvey Aug. 6, 1907 Bauer Jan. 18, 1921 Garvey July 5, 1932 Molyneux-Seel et a]. Aug. 14, 1934 Hollenbeck June 4, 1940 Roger Apr. 28, 1942 Falkman Oct. 12, 1943 Driscoll Jan. 15, 1946