US158325A - Improvement in flexible shafts for dental engines - Google Patents
Improvement in flexible shafts for dental engines Download PDFInfo
- Publication number
- US158325A US158325A US158325DA US158325A US 158325 A US158325 A US 158325A US 158325D A US158325D A US 158325DA US 158325 A US158325 A US 158325A
- Authority
- US
- United States
- Prior art keywords
- improvement
- flexible shafts
- dental engines
- dental
- engines
- 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
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000899 Gutta-Percha Substances 0.000 description 2
- 240000000342 Palaquium gutta Species 0.000 description 2
- 229920000588 gutta-percha Polymers 0.000 description 2
- 241000404144 Pieris melete Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/72—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
- F16D3/74—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts the intermediate member or members being made of rubber or other rubber-like flexible material
Definitions
- the object of my invention is to secure a rotating shaft for transmitting powerfrom the prime mover to the operating tool, which shall be capable of flexing freely Without interrupting the transmission ot' the driving-power, while sufliciently rigid against torsional strains.
- the coiled-wiresprin g cables or shafts heretofore used for this purpose have been found in practice to possess defects which it. is my object to remove; to which end my improvement consists in combining a cable with an envelope of rubber, gutta-percha, or equivalent material, which closely embraces and rotates with the cable.
- Figure 1 shows a view, partly in section, ofmy improved nexible shaft, connected with the hand-pieces of a dental engine.
- Fig. 2 represents a simi-j 2, or of a series of pin-jointed slotted links, as shown in Fig. 3.
- This latter. form of cable is not, however, herein claimed per se, as it forms the subject-matter of Letters Patent granted to me December 8, 1874.
- This central Ebre or cable is inclosed b v well-known means within a closely-adhering engvelope, B, composed of rubber o-gittapereha, whicl"forms an integral part of the shaft, and of course rotatesavith it.
- B closely-adhering engvelope
- T' We found this shaf't to possessfgreat flexibility and capacity for transmitting mo tion steadily, and Without springing or jumping. to dispense with a non-rotating flexible sheath heretofore employed, thus simplifying the cost of the mechanism and lessening its liability to 4 derangement, while avoiding the danger of entangling the hair of the patient with the rotating shaft.
- the flexible shaft hereinbefore set forth consisting of the combination of a exible metallic cable and a closely-adhering envelope ot' rubber or gutta-percha.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Description
Patented Dec. 29, l874.-
No.l58,3f25.
b@ Mm .um .Q BW.
MKMM
UNITED STATES PATENT OFFICE.
ELI T. STARR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SAMUEL S. WHITE, OF SAME PLACE.
IMPROVEMENT IN FLEXIBLE SHAFTS FOR DENTAL ENGINES.
Specification forming part of Letters Patent No. 158,325, dated December 29, 1874; application filed DecemberwrlflLlSZfLmu CAsE B.
To all whom it may concern:
Be it known that I, ELI T. STARR, of the city and county of Philadelphia, in the State of Pennsylvania, have invented an Improved Flexible Shaft for Dental Engines, of which the following is a specification The object of my invention is to secure a rotating shaft for transmitting powerfrom the prime mover to the operating tool, which shall be capable of flexing freely Without interrupting the transmission ot' the driving-power, while sufliciently rigid against torsional strains.
The coiled-wiresprin g cables or shafts heretofore used for this purpose have been found in practice to possess defects which it. is my object to remove; to which end my improvement consists in combining a cable with an envelope of rubber, gutta-percha, or equivalent material, which closely embraces and rotates with the cable.
In the accompanying drawings, Figure 1 shows a view, partly in section, ofmy improved nexible shaft, connected with the hand-pieces of a dental engine. Fig. 2 represents a simi-j 2, or of a series of pin-jointed slotted links, as shown in Fig. 3. This latter. form of cable is not, however, herein claimed per se, as it forms the subject-matter of Letters Patent granted to me December 8, 1874.
This central Ebre or cable is inclosed b v well-known means within a closely-adhering engvelope, B, composed of rubber o-gittapereha, whicl"forms an integral part of the shaft, and of course rotatesavith it. In practice T'have found this shaf't to possessfgreat flexibility and capacity for transmitting mo tion steadily, and Without springing or jumping. to dispense with a non-rotating flexible sheath heretofore employed, thus simplifying the cost of the mechanism and lessening its liability to 4 derangement, while avoiding the danger of entangling the hair of the patient with the rotating shaft. I claiml The flexible shaft hereinbefore set forth, consisting of the combination of a exible metallic cable and a closely-adhering envelope ot' rubber or gutta-percha.
In testimony whereof l have hereunto subscribed my name.
ELI T. STARR. Witnesses:
J As. B. WILLIAMS, FRANK L. HIsE.
I am also enabled by this construction l
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US158325A true US158325A (en) | 1874-12-29 |
Family
ID=2227735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US158325D Expired - Lifetime US158325A (en) | Improvement in flexible shafts for dental engines |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US158325A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452752A (en) * | 1947-01-13 | 1948-11-02 | Elastic Chain Company | Method of making elastic chains |
| US2584209A (en) * | 1947-03-28 | 1952-02-05 | Charles R Hughart | Two-man portable power saw |
| US3149480A (en) * | 1962-08-10 | 1964-09-22 | Marco Products Co | Plumbers' snake |
| US3528312A (en) * | 1968-06-14 | 1970-09-15 | Microdot Inc | Push-pull cable assembly |
| US4432874A (en) * | 1981-07-06 | 1984-02-21 | Lars Lundin | Collecting rope |
-
0
- US US158325D patent/US158325A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452752A (en) * | 1947-01-13 | 1948-11-02 | Elastic Chain Company | Method of making elastic chains |
| US2584209A (en) * | 1947-03-28 | 1952-02-05 | Charles R Hughart | Two-man portable power saw |
| US3149480A (en) * | 1962-08-10 | 1964-09-22 | Marco Products Co | Plumbers' snake |
| US3528312A (en) * | 1968-06-14 | 1970-09-15 | Microdot Inc | Push-pull cable assembly |
| US4432874A (en) * | 1981-07-06 | 1984-02-21 | Lars Lundin | Collecting rope |
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