US390576A - George evans - Google Patents
George evans Download PDFInfo
- Publication number
- US390576A US390576A US390576DA US390576A US 390576 A US390576 A US 390576A US 390576D A US390576D A US 390576DA US 390576 A US390576 A US 390576A
- Authority
- US
- United States
- Prior art keywords
- bulb
- heat
- evans
- george
- george evans
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000523 sample Substances 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 229910052709 silver Inorganic materials 0.000 description 8
- 239000004332 silver Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 206010022114 Injury Diseases 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0028—Instruments or appliances for wax-shaping or wax-removing
Definitions
- WITNESSES wENTon l (A Z W1 Pff'w ATTORNEY N. PETERS, Phckv-Lkhagnphur. Wuhinglun. 0.0
- the invention relates to instruments for con veyiug heat to narrow channels or interstices of the teethas the nerve-canals in the rootsfor the purposes of drying the same preparatory to filling, or destroying live nerves by heat.
- Such instruments are commonly made of a bulb or mass of metal adapted as a reservoir to store heat derived from a tlame or other source, and to subsequently dispense the heat through a wire or probe extending from the bulb,whereby the application is made at points difficult of access.
- the object of the present invention is to employ materials in the construction of this class of instruments such as will best and most effectually carry out their functions; and it consists in combining with the bulb or reser' voir part, consisting of any suitable heat-retaining metal-such as copper-a probe or point composed of silver, which, possessing greater thermal conductibility than other metals, I find in practice to materially increase 0 the efficiency of the instrument.
- Figure 1 is a perspective view of the instrument inserted to the nerve canal of a tooth; and Fig. 2, an enlarged side view of the instrument, showing the bulb in section.
- the bulb A preferably of copper, is removably secured, as by a screw-threaded stud, a, to the separate holder B, preferably of a material which will not conduct heat to the hand of the operator.
- the lower end of the bulb A is provided with a screw-thread to receive the threaded shank of the silver probe 0, which is readily removable thereby, and may be easily substituted for different ones, or in event of injury.
- the silver being ductile, admits, furthermore, of repeated bending to accommodate the position of the cavity to be reached.
- a dental heatapplyiug instrument composed of a bulb-reservoir (as ofcopper) adapted for receiving and storing heat, and a probe of silver attached to and extending from said bulb, adapted to conduct the stored heat to a point of application.
Description
(No Model.) S
G. EVANS.
DENTAL TOOL. I No. 390,576; Patented Oct. 2, 1888'.
WITNESSES: wENTon l (A Z W1 Pff'w ATTORNEY N. PETERS, Phckv-Lkhagnphur. Wuhinglun. 0.0
NITED STATES PATENT Fries.
GEORGE EVANS, OF NEW YORK, N. Y.
DENTAL Toot.
SPECIFICATION forming part of Letters Patent No, 390,576. dated Qctober 2, 1888.
I Application filed January 10, 1888. Serial No. 260.356. (No model.)
To a whom it may concern:
Be it known that 1, GEORGE EVANS, a citizen of the United States, residing at the city, county, and State of New York, have invented certain new and useful Improvements in Thermal Instruments for Dentistry, of which the following is a specification.
The invention relates to instruments for con veyiug heat to narrow channels or interstices of the teethas the nerve-canals in the rootsfor the purposes of drying the same preparatory to filling, or destroying live nerves by heat. Such instruments are commonly made of a bulb or mass of metal adapted as a reservoir to store heat derived from a tlame or other source, and to subsequently dispense the heat through a wire or probe extending from the bulb,whereby the application is made at points difficult of access.
The object of the present invention is to employ materials in the construction of this class of instruments such as will best and most effectually carry out their functions; and it consists in combining with the bulb or reser' voir part, consisting of any suitable heat-retaining metal-such as copper-a probe or point composed of silver, which, possessing greater thermal conductibility than other metals, I find in practice to materially increase 0 the efficiency of the instrument.
Referring to the drawings accompanying this specification, Figure 1 is a perspective view of the instrument inserted to the nerve canal of a tooth; and Fig. 2, an enlarged side view of the instrument, showing the bulb in section.
The bulb A, preferably of copper, is removably secured, as by a screw-threaded stud, a, to the separate holder B, preferably of a material which will not conduct heat to the hand of the operator. The lower end of the bulb A is provided with a screw-thread to receive the threaded shank of the silver probe 0, which is readily removable thereby, and may be easily substituted for different ones, or in event of injury. The silver, being ductile, admits, furthermore, of repeated bending to accommodate the position of the cavity to be reached.
I claim- A dental heatapplyiug instrument composed ofa bulb-reservoir (as ofcopper) adapted for receiving and storing heat, and a probe of silver attached to and extending from said bulb, adapted to conduct the stored heat to a point of application.
GEORGE EVANS.
Witnesses:
CHAS. W. FORBES, S. P. VAN OAMPEN, Jr.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US390576A true US390576A (en) | 1888-10-02 |
Family
ID=2459552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US390576D Expired - Lifetime US390576A (en) | George evans |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US390576A (en) |
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0
- US US390576D patent/US390576A/en not_active Expired - Lifetime
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