US171443A - Improvement in dental chairs - Google Patents
Improvement in dental chairs Download PDFInfo
- Publication number
- US171443A US171443A US171443DA US171443A US 171443 A US171443 A US 171443A US 171443D A US171443D A US 171443DA US 171443 A US171443 A US 171443A
- Authority
- US
- United States
- Prior art keywords
- improvement
- chair
- sleeve
- dental chairs
- chairs
- 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
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle
Definitions
- Patented De c. 21, 1875 Patented De c. 21, 1875.
- Figure 1 represents a view of so much of my improved elevating apparatus as is necessary to illustrate the subject-matter herein claimed Fig.
- the base A of the chair may be constructed in any of the usual well-known ways, and is provided at its upper end with a collar, a, in which a tubular sleeve, B, fits snugly and moves freely endwise, but is prevented from turning by lugs 12 of a nut, C, fixed in the collar a, which lugs pass through vertical slots b in the walls of the tubular sleeve.
- a screwspindle, D inclosed within the sleeve, passes I through'the nut U, and has mounted upon its upperend a bevel-pinion,d, driven byacorrespondin g pinion, a, mounted on a shaft, E, supported upon the frame of the chair and driven in any of the usual well-known ways.
- the turning of this screw raises or lowers both it and its enveloping sleeve, and, of course, the body of the chair also, while the ends of the slots in the sleeve act as stops to limit the range of adjustment of the chair
- My invention enables me to protect the screw and secure a strong, simple, and convenient method of adjustment, While enabling me to dispense with a fixed screw-sleeve, such as has heretofore in one instance been employed.
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- Accommodation For Nursing Or Treatment Tables (AREA)
Description
.E. T. STARR.
DENTAL-CHAIR.
Patented De c. 21, 1875.
N. PETERS, PHDTD-LITHOGRAPHER. WASHINGTON. D C.
UNITED STATEs PATENT OFFICE.
ELI T..STARR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SAMUEL S. WHITE, OF SAME PLACE.
IMPROVEMENT IN DENTAL CHAIRS.
Specification forming part of Letters Patent No. 171,443, dated December 21, 1875; application filed November 5, 1875.
To all whom it may concern:
Be it known that I, ELI T. STARR, of the city of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Dentists Chairs, of which the following is a specification My invention relates to dentists chairs of that class provided with means for raising and lowering the seat.
The subject-matter claimed will hereinafter specifically be designated.
In the accompanying drawings, Figure 1 represents a view of so much of my improved elevating apparatus as is necessary to illustrate the subject-matter herein claimed Fig.
2, a horizontal section therethrough on the line of the fixed nut, and Fig. 3 a vertical section through the apparatus.
The base A of the chair may be constructed in any of the usual well-known ways, and is provided at its upper end with a collar, a, in which a tubular sleeve, B, fits snugly and moves freely endwise, but is prevented from turning by lugs 12 of a nut, C, fixed in the collar a, which lugs pass through vertical slots b in the walls of the tubular sleeve. A screwspindle, D, inclosed within the sleeve, passes I through'the nut U, and has mounted upon its upperend a bevel-pinion,d, driven byacorrespondin g pinion, a, mounted on a shaft, E, supported upon the frame of the chair and driven in any of the usual well-known ways. The turning of this screw raises or lowers both it and its enveloping sleeve, and, of course, the body of the chair also, while the ends of the slots in the sleeve act as stops to limit the range of adjustment of the chair.
My invention enables me to protect the screw and secure a strong, simple, and convenient method of adjustment, While enabling me to dispense with a fixed screw-sleeve, such as has heretofore in one instance been employed.
I do not broadly claim the combination of a movable sleeve and a spindle inclosed therein but I claim as of my own invention- The chair-elevating apparatus hereinbefore
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US171443A true US171443A (en) | 1875-12-21 |
Family
ID=2240850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US171443D Expired - Lifetime US171443A (en) | Improvement in dental chairs |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US171443A (en) |
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0
- US US171443D patent/US171443A/en not_active Expired - Lifetime
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