US177835A - Improvement in school-desks - Google Patents
Improvement in school-desks Download PDFInfo
- Publication number
- US177835A US177835A US177835DA US177835A US 177835 A US177835 A US 177835A US 177835D A US177835D A US 177835DA US 177835 A US177835 A US 177835A
- Authority
- US
- United States
- Prior art keywords
- school
- desk
- desks
- seat
- improvement
- 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
- 210000001847 Jaw Anatomy 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 210000001747 Pupil Anatomy 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010454 slate Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 210000003128 Head Anatomy 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000976 ink Substances 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- -1 rawhide Substances 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0604—Construction of the male part
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32549—Articulated members including limit means
- Y10T403/32557—Articulated members including limit means for pivotal motion
- Y10T403/32591—Opposed stops on one member
Definitions
- My invention relates to that class of schoolfurniture which consists of a combined desk and folding-seat settee; and it consists in the manner of forming andattaching the setteeback; also, in the construction of the desktop, and in the form of the seat hinge or joint, all as hereinafter more fully set forth.
- Figure 1 is a transverse vertical section of a school-desk em-' bodying my invention.
- Figs. 2, 3, and 4 show detached parts of the same.
- the frame of my combined desk and settee consists of two iron standards, A A, with jointed seat-arms B B, provided, as usual, with flanges or lugs drilled for screws by which to attach the wood-work.
- a A jointed seat-arms B B
- flanges or lugs drilled for screws by which to attach the wood-work.
- a V-shaped groove, 1 Upon the inner or rear surface of the woodback (J, near each end, is formed a V-shaped groove, 1), to receive the tongue 01' dowel part a of the standard, when'secnred in place by screws.
- This serves as a rigid brace, securing the desk from any diagonal or lateral motion, thus adding to the durability of the desk, and making it more stable and satisfactory in service.
- the peculiar form of the tongue ordowel is such that the contact with the woodback is not broken by shrinkage of the wood, and, in the event of any wear, it may be secured anew by tighteningthe screws.
- each seat-arm B at right angles to it, and part thereof, is a flange, B, with a circular collar or hub, 61, pierced in its center to receive a pivot-bolt.
- the flange below this collar is recessed to form stops as 50..
- each standard is cast two jaws, h h, one of which, h, is elastic or "flexi ble, pierced for two bolts, 6 and c; the bolt 6 being the pivot of the seat-arm, and the bolt 0, sustaining a cushion, i, of leather, rawhide, rubber, or other elastic substance, serves as a stop to hold the seat at its proper point, either when folded or in position for use.
- a cushion i, of leather, rawhide, rubber, or other elastic substance, serves as a stop to hold the seat at its proper point, either when folded or in position for use.
- Between the jaws h I1. is sufiicient room to receive the recessed flange of the seatarm, and also the cushion i, for deadening any sound from percussion in any movement.
- the elastic jaw h operates by the tightening of the pivot-bolt e, as a clamp, to prevent a too free movement of the seat, and to hold it at any angle of elevation without a tendency to fall of its own weight and create noise. Its elasticity also acts eifectually to prevent any moving of either pivot-bolt or nut. ency to loosen the nut on the pivot-bolt is effectually overcome by the head and nut of said bolt, both having a bearing upon the jaws, and being entirely removed from the seatarm. Both ends of the pivot and stop bolts are supported, thus adding strengthto noiselessness, ease of operation, durability, and elegance.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Description
A W. HEMPLEMAN.
' SCHOOL-DESK. No. 177,835. Patented May 23,1876.
WMW 00am Witter-n ey NJETERS. PNOTO-UTHOGRAFHEH, WASHINGTON, I)v C.
' 1'\TrrEn STATES PATENT FFIGE.
AARON W. HEMPLEMAN, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT m'sci-loor-oasKs'.
Specification forming part of Letters Patent No. 177,835, dated May 23, 1876 application filed February 25, 1876.
' To all whom it mag concern:
Be it known that I, AARON W. HEMPLE- MAN, of Philadelphia, in the county of Phila delphia and State of Pennsylvania, have invented certain new and useful Improvements in School-Desks and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form part of this specification.
My invention relates to that class of schoolfurniture which consists of a combined desk and folding-seat settee; and it consists in the manner of forming andattaching the setteeback; also, in the construction of the desktop, and in the form of the seat hinge or joint, all as hereinafter more fully set forth.
In the annexed drawing, Figure 1 is a transverse vertical section of a school-desk em-' bodying my invention. Figs. 2, 3, and 4 show detached parts of the same.
The frame of my combined desk and settee consists of two iron standards, A A, with jointed seat-arms B B, provided, as usual, with flanges or lugs drilled for screws by which to attach the wood-work. To the front of these standards I form, by casting a V'shaped used.
Upon the inner or rear surface of the woodback (J, near each end, is formed a V-shaped groove, 1), to receive the tongue 01' dowel part a of the standard, when'secnred in place by screws. This serves as a rigid brace, securing the desk from any diagonal or lateral motion, thus adding to the durability of the desk, and making it more stable and satisfactory in service. The peculiar form of the tongue ordowel is such that the contact with the woodback is not broken by shrinkage of the wood, and, in the event of any wear, it may be secured anew by tighteningthe screws.
As ordinarily made, the desk -top soon cracks, warps, and twists from the changeable temperature of the school-room, rendering the desk-tops unsightly, and oftentimes unfitted for use. As a remedy, I form the desk-top of common slate, D, so framed in a frame, E, of
wood, iron, or other material as to present a flush and smooth upper surface. This furnishes and continues to remain a smooth level table, not affected by temperature or climate, nor stained by inks or acids. It also, furnishes, in the most convenient manner for the use of the pupil, a slate surface, and, at the same time, secures a degree of quiet in the schoolexercises which cannot be attained when the pupils are required to use movable slates. Attached to each seat-arm B, at right angles to it, and part thereof, is a flange, B, with a circular collar or hub, 61, pierced in its center to receive a pivot-bolt. The flange below this collar is recessed to form stops as 50.. At a suitable point on each standard are cast two jaws, h h, one of which, h, is elastic or "flexi ble, pierced for two bolts, 6 and c; the bolt 6 being the pivot of the seat-arm, and the bolt 0, sustaining a cushion, i, of leather, rawhide, rubber, or other elastic substance, serves as a stop to hold the seat at its proper point, either when folded or in position for use. Between the jaws h I1. is sufiicient room to receive the recessed flange of the seatarm, and also the cushion i, for deadening any sound from percussion in any movement. The elastic jaw h operates by the tightening of the pivot-bolt e, as a clamp, to prevent a too free movement of the seat, and to hold it at any angle of elevation without a tendency to fall of its own weight and create noise. Its elasticity also acts eifectually to prevent any moving of either pivot-bolt or nut. ency to loosen the nut on the pivot-bolt is effectually overcome by the head and nut of said bolt, both having a bearing upon the jaws, and being entirely removed from the seatarm. Both ends of the pivot and stop bolts are supported, thus adding strengthto noiselessness, ease of operation, durability, and elegance.
Having thus fully described my invention,
what I claim as new, and desire to secure by Letters Patent, is-
l. The combination of the standard A, provided with a V-shaped projection, a, along its forward edge, and the back 0, provided with a The tendcorresponding groove, 1), on its rear side, sub- In testimony that I claim the foregoing as stantially as and for the purposes herein set my own invention, I'herennto affix my signaforth. ture in presence of two witnesses.
2. The combination, in a school-deskw hinge, of the recessed flange B on the seat-arm, AARON -W. HEMPLEMAN. the fixed jaw. h, and elastic jaw h, on thestandard; the bolts e e, and cushion i, all'sub- 3 Witnesses: stantially as and for the purposes herein set J NO. W. FRANCIS,
forth. ,j J AMES E. CLARK. I
Publications (1)
Publication Number | Publication Date |
---|---|
US177835A true US177835A (en) | 1876-05-23 |
Family
ID=2247242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US177835D Expired - Lifetime US177835A (en) | Improvement in school-desks |
Country Status (1)
Country | Link |
---|---|
US (1) | US177835A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637528A (en) * | 1984-01-19 | 1987-01-20 | William H. Rorer, Inc. | Articulated joint in aerosol medicament dispenser |
-
0
- US US177835D patent/US177835A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637528A (en) * | 1984-01-19 | 1987-01-20 | William H. Rorer, Inc. | Articulated joint in aerosol medicament dispenser |
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