US1002773A - Form for producing artificial tooth-crowns. - Google Patents

Form for producing artificial tooth-crowns. Download PDF

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Publication number
US1002773A
US1002773A US53558009A US1909535580A US1002773A US 1002773 A US1002773 A US 1002773A US 53558009 A US53558009 A US 53558009A US 1909535580 A US1909535580 A US 1909535580A US 1002773 A US1002773 A US 1002773A
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United States
Prior art keywords
crowns
tooth
artificial tooth
producing artificial
plug
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Expired - Lifetime
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US53558009A
Inventor
Edward Russell Stevenson
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Individual
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Priority to US53558009A priority Critical patent/US1002773A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
    • B21D26/055—Blanks having super-plastic properties

Definitions

  • Figure 1 is a perspective view of a toothform constructed according to my invention.
  • Fig. 2 is a perspective view of the tooth-form with a plug inserted.
  • Fig. 3 is a longitudinal section of the form and plug shown in Fig. 2; and
  • Fig. 4 is a perspective view of the lug.
  • My tooth-crown 1 is in the form of a molar, but it is of course, to be understood that it may have any other form corresponding to the tooth which is to be crowned or capped. It is provided with a cavity2which opens at the top and extends nearly to the bottom as shown in Fig. 3.
  • the plug 8 which is constructed of some hard substance, preferably metal, is made of the same shape or form as the cavity 2, and thus adapted to be inserted and fit neatly in the same as indicated in Fig. 3.
  • the plug is provided with a stem 3 for convenience of manipulation in inserting and removing it.
  • an easily fusible metal is poured around it, thus .producing a counter-part die in metal, into which the plate to form the desired crown is pressed and swaged.
  • My improved tooth-form being hollow is adapted to receive a plug or other device adapted for expanding it, and thus, by using different sized plugs or expanding devices, the form may be enlarged circumferentially so that several sizes of crowns may be produced by means of one form; and also the shape of the form may be changed to a certain extent, by using plugs differing more or less in contour.
  • Forms made of solid rubber, vulcanized, or of other rigid material cannot be expanded or altered in shape, and are thus adapted to produce only a single unvarying form of die.
  • Thesoft-rubber form having the general external contour or shape of the body and crown of a natural tooth, and provided centrally, in its upper side, with a cavity extending nearly to the bottom of the form and adapted to receive a tapered expanding device, as and for the purpose specified.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Prostheses (AREA)

Description

E. R. STEVENSON. FORM FOR PRODUCING ARTIFICIAL TOOTH OROWNS. APPLICATION FILED 3050. so, 1909.
1,002,7'7'3. Patented Sept. 5,1911.
WITNESSES INVENTOR Z M fDW/IRD /T67El/E/V60(V ATTORNE Y8 COLUMBIA PLANOGRAPH 150.. WASHINGTON. IL c.
EDWARD RUSSELL STEVENSON, OF OAKLAND, OREGON.
FORM FOR PRODUCING ARTIFICIAL TOOTH-CROWNS.
Specification of Letters Patent.
Patented Sept. 5, 1911.
Application filed December 30, 1909. Serial No. 535,580.
a certain new and Improved Form for Pro ducing Artificial Tooth-Crowns, of which the following is a specification.
Artificial, seamless tooth-crowns, are applied to defective natural teeth for producing new artificial grinding surfaces. In manufacturing such crowns, a plate of ductile metal, preferably gold, is pressed and swaged into the required form. So-called tooth-forms are used in the production of such crowns. If a crown for a molar is to be made, a 'tooth form shaped like a molar is employed, and around it is poured some metal which is easily fusible at a low heat, and thus a counter-part die is formed, into which gold or other suitable metal plate is pressed and swaged to form the desired crown. The tooth-forms heretofore used in this operation are solid and not expansible. I have devised an improved form which is hollow and elastic, and thus adapted to be expanded by means of an inserted plug or other suitable device, whereby important advantages are attained, as will be hereinafter set forth.
In the accompanying drawingFigure 1 is a perspective view of a toothform constructed according to my invention. Fig. 2 is a perspective view of the tooth-form with a plug inserted. Fig. 3 is a longitudinal section of the form and plug shown in Fig. 2; and Fig. 4 is a perspective view of the lug.
My tooth-crown 1 is in the form of a molar, but it is of course, to be understood that it may have any other form corresponding to the tooth which is to be crowned or capped. It is provided with a cavity2which opens at the top and extends nearly to the bottom as shown in Fig. 3. The plug 8, which is constructed of some hard substance, preferably metal, is made of the same shape or form as the cavity 2, and thus adapted to be inserted and fit neatly in the same as indicated in Fig. 3. The plug is provided with a stem 3 for convenience of manipulation in inserting and removing it.
To form a die by means of the tooth-form 1, an easily fusible metal is poured around it, thus .producing a counter-part die in metal, into which the plate to form the desired crown is pressed and swaged.
My improved tooth-form being hollow is adapted to receive a plug or other device adapted for expanding it, and thus, by using different sized plugs or expanding devices, the form may be enlarged circumferentially so that several sizes of crowns may be produced by means of one form; and also the shape of the form may be changed to a certain extent, by using plugs differing more or less in contour. Forms made of solid rubber, vulcanized, or of other rigid material, cannot be expanded or altered in shape, and are thus adapted to produce only a single unvarying form of die.
What I claim is:
Thesoft-rubber form having the general external contour or shape of the body and crown of a natural tooth, and provided centrally, in its upper side, with a cavity extending nearly to the bottom of the form and adapted to receive a tapered expanding device, as and for the purpose specified.
EDWARD RUSSELL STEVENSON.
Witnesses:
H. M. STEPHENS, GEO. J. STEARNS.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0.
US53558009A 1909-12-30 1909-12-30 Form for producing artificial tooth-crowns. Expired - Lifetime US1002773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US53558009A US1002773A (en) 1909-12-30 1909-12-30 Form for producing artificial tooth-crowns.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53558009A US1002773A (en) 1909-12-30 1909-12-30 Form for producing artificial tooth-crowns.

Publications (1)

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US1002773A true US1002773A (en) 1911-09-05

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US53558009A Expired - Lifetime US1002773A (en) 1909-12-30 1909-12-30 Form for producing artificial tooth-crowns.

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