US180070A - Improvement in slate-frames - Google Patents
Improvement in slate-frames Download PDFInfo
- Publication number
- US180070A US180070A US180070DA US180070A US 180070 A US180070 A US 180070A US 180070D A US180070D A US 180070DA US 180070 A US180070 A US 180070A
- Authority
- US
- United States
- Prior art keywords
- slate
- wire
- frames
- improvement
- frame
- 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
- 239000010454 slate Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
Definitions
- a and A are portions ot two bars of a slate frame, the former being mortised to receive a tenou on the latter, and the two being glued together, as in ordinary slatet'ranies.
- I use the wire shown in the drawing, the straight central portion of this wire from Aat to y passing diagonally througha hole made in the corner of the' frame.
- the wire is bent, and from the bend pursues a straight course in a recess formed in the outer edge ot' the bar A, into which the bent end a ofthe wire is driven, as shown.
- the wire from its bent end :o is adapted to a groove in the edge of the bar A, and its bent end a. driven into the saine, the wire being thus in the best position for resisting any tendency of the bars to part at the joint, and the wire being so bent that -it cannot be displaced by any ordinary strains to which the frame may be subjected.
Description
PATENT OTETGEo JOHN W. SAYRE, OF MARTINS CREEK, PENNSYLVANIA.
IMPROVEMENT IN SLATE'l-RAMES.
Specification forming part of Letters Patent No.
180,070, dated July 18,1876; applicationhfiled December 11, 1875.
. Slate-Frame Corners, 01" which the following is a specication The object otl my invention is to so secure the frames ot school-slates together at the corners as to insure additional strength; and this object I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawing, in which- Figure l is a section yl view, and Fig. 2 a perspective view, of a corner otl a slate-frame strengthened according to my invention.
A and A are portions ot two bars of a slate frame, the former being mortised to receive a tenou on the latter, and the two being glued together, as in ordinary slatet'ranies. In or,- der to strengthen this joint I use the wire shown in the drawing, the straight central portion of this wire from Aat to y passing diagonally througha hole made in the corner of the' frame.
At the point y the wire is bent, and from the bend pursues a straight course in a recess formed in the outer edge ot' the bar A, into which the bent end a ofthe wire is driven, as shown. In like manner the wire from its bent end :o is adapted to a groove in the edge of the bar A, and its bent end a. driven into the saine, the wire being thus in the best position for resisting any tendency of the bars to part at the joint, and the wire being so bent that -it cannot be displaced by any ordinary strains to which the frame may be subjected.
I claim as my invention- The within-described slateframe fastening, consisting ot' a wire passeddiagonally through the corner of a frame, and having its ends bent inward and sunk into the'adjoining bars, all substantially as described.
In testimony whereotI I have signed my naine to this specication in the presence of two subscribing witnesses.
. JOHN W. SAYRE.y
Witnesses:
JOHN J. MILLER, R. C. MERRILL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US180070A true US180070A (en) | 1876-07-18 |
Family
ID=2249476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US180070D Expired - Lifetime US180070A (en) | Improvement in slate-frames |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US180070A (en) |
-
0
- US US180070D patent/US180070A/en not_active Expired - Lifetime
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