US133087A - Improvement in adjustable desks - Google Patents
Improvement in adjustable desks Download PDFInfo
- Publication number
- US133087A US133087A US133087DA US133087A US 133087 A US133087 A US 133087A US 133087D A US133087D A US 133087DA US 133087 A US133087 A US 133087A
- Authority
- US
- United States
- Prior art keywords
- shelf
- improvement
- adjustable
- center
- adjustable desks
- 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
- 240000004282 Grewia occidentalis Species 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B57/00—Cabinets, racks or shelf units, characterised by features for adjusting shelves or partitions
- A47B57/04—Cabinets, racks or shelf units, characterised by features for adjusting shelves or partitions with means for adjusting the inclination of the shelves
Definitions
- My invention relates to the combination of a level plane or shelf with the inclinable plane or table of an adjustable desk; the object of my invention being to cause, by a simple selfadjustment, said shelf to retain its level or horizontal position Whatever may be the inclination of the said table.
- Figure 1 is a side elevation of so much of an adjustable desk as embodies my invention.
- Fig. 2 is simply a parallelogram, illustrating the principle on which my invention is based.
- E is the plane or shelf, which is to be kept in a horizontal position.
- F is a projection, connected firmly with a part of the support 0.
- G is a rod connecting the level shelf E with the support 0, being hinged at H and F.
- the shelf E will always retain a horizontal position, as shown by the dotted lines in two positions of said table, the one being nearly upright the other horizontal.
- the center of motion at B is placed near the center of the length of the table A-that is, at a distance from the lower or front edgeof the table, so that the table is balanced as to the whole or a part of its length.
- I claim- 1 The combination, in an adjustable desk, of the shelf E, table A, support 0, plates B B pressed together by any suitable device, and the rod G connected to one of the plates B at F and to the shelf E at H, all constructed substantially as described.
Landscapes
- Tables And Desks Characterized By Structural Shape (AREA)
Description
E. DU MMER.
mprovement in Adjustable-Desks.
Patent'd Nov. 19,1872.
Fig. 1.
wi mzssss VINVENTGR.
/a wmd vhf K/Qw AM. PHOTO-LIT/IDGRAFH/C CZZMY. (OSBORNES PNUCESS.)
UNITED STATES PATENT OFFICE.
EDWARD DUMMER, OF NEWBURYPORT, MASSACHUSETTS.
IMPROVEMENT IN ADJUSTABLE DESKS.
Specification forming part of Letters Patent No. 133,087, dated November 19, 1872.
Nature and Objects of the Invention.
My invention relates to the combination of a level plane or shelf with the inclinable plane or table of an adjustable desk; the object of my invention being to cause, by a simple selfadjustment, said shelf to retain its level or horizontal position Whatever may be the inclination of the said table.
Description of the Accompanying Drawing.
Figure 1 is a side elevation of so much of an adjustable desk as embodies my invention. Fig. 2 is simply a parallelogram, illustrating the principle on which my invention is based.
General Description.
other method of fastening may be used. E is the plane or shelf, which is to be kept in a horizontal position. F is a projection, connected firmly with a part of the support 0. G is a rod connecting the level shelf E with the support 0, being hinged at H and F. I
is the hinge or one of the hinges by which the shelf is pivoted to the table.
In the perfect working the whole is so arranged that the distance from center of motion at B to that at l is the same as from the center of motion at F to that at H; also, the
distance from center B to center F is the same as from I to H; or, in other words, the four centers at B, I, F, and H, as it were, form the four corners of a parallelogram, as shown in Fig. 2. With such arrangement, whatever be the position of the inclinable table A, the shelf E will always retain a horizontal position, as shown by the dotted lines in two positions of said table, the one being nearly upright the other horizontal. Moreover, the center of motion at B is placed near the center of the length of the table A-that is, at a distance from the lower or front edgeof the table, so that the table is balanced as to the whole or a part of its length.
I claim- 1. The combination, in an adjustable desk, of the shelf E, table A, support 0, plates B B pressed together by any suitable device, and the rod G connected to one of the plates B at F and to the shelf E at H, all constructed substantially as described.
2. In an adjustable desk the table A, pivoted and supported near the middle of its length, in combination with the shelf E, when connected together, so as to operate substantially as described.
EDWARD DUMMER.
Witnesses:
F. CURTIS, LEONARD N. KENT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US133087A true US133087A (en) | 1872-11-19 |
Family
ID=2202503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US133087D Expired - Lifetime US133087A (en) | Improvement in adjustable desks |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US133087A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547382A (en) * | 1947-02-21 | 1951-04-03 | Borg Warner | Folding work surface with plural section cover |
| US2739858A (en) * | 1953-07-13 | 1956-03-27 | Air Reduction | Self-leveling tray for operating tables |
| US5199360A (en) * | 1988-09-27 | 1993-04-06 | Sirkka Koistinen | Table constructions |
-
0
- US US133087D patent/US133087A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547382A (en) * | 1947-02-21 | 1951-04-03 | Borg Warner | Folding work surface with plural section cover |
| US2739858A (en) * | 1953-07-13 | 1956-03-27 | Air Reduction | Self-leveling tray for operating tables |
| US5199360A (en) * | 1988-09-27 | 1993-04-06 | Sirkka Koistinen | Table constructions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US659532A (en) | Adjustable table. | |
| US2542480A (en) | Chair having a vertically adjustable seat | |
| US133087A (en) | Improvement in adjustable desks | |
| US639611A (en) | Shelf attachment for ladders. | |
| US679003A (en) | Display rack or stand. | |
| US1044196A (en) | Draftsman's table. | |
| US1091290A (en) | Adjustable foot-rest. | |
| US624869A (en) | And james h | |
| US568139A (en) | Book-rest | |
| US509277A (en) | Convertible chair | |
| US881190A (en) | Table-support. | |
| US138461A (en) | Improvement in tilting chairs | |
| US872941A (en) | Swing-shelf. | |
| US1160380A (en) | Work-bench. | |
| US112038A (en) | Improvement in school desks and seats | |
| US342343A (en) | james p | |
| US308921A (en) | School-furniture | |
| US186020A (en) | Improvement in combined toilet-table and music-stand | |
| US137917A (en) | Improvement in extension tables | |
| US178747A (en) | Improvement in book-supports or table attachments for bedsteads | |
| US601118A (en) | Folding stool | |
| US559162A (en) | Adjustable table | |
| US136167A (en) | Improvement in folding-tables | |
| US126571A (en) | Improvement in hinges | |
| US121596A (en) | Improvement in extensible furniture |