US424931A - Draw-leaf slate - Google Patents

Draw-leaf slate Download PDF

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US424931A
US424931A US424931DA US424931A US 424931 A US424931 A US 424931A US 424931D A US424931D A US 424931DA US 424931 A US424931 A US 424931A
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Prior art keywords
slate
leaf
draw
edges
leaves
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    • 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

Definitions

  • Vllil UNITED STATES PATENT OFFICE Vllil UNITED STATES PATENT OFFICE.
  • the object of my invention is to protect and strengthen the edges of the slate-leaves, to prevent buckling of said slate-leaves when made of non-rigid substance, and to form a smooth and even surface sliding in the grooves of the frame.
  • Figure 1 shows a slate com plete with one of the leaves partially withdrawn.
  • Fig. 2 shows one of the leaves entirely withdrawn.
  • Fig. 3 is an enlarged section of the edge of the slate-leaf and metal binding, taken at 00, Fig. 1.
  • the binding designated by the letter a is made of thin strips of metal, bent twice at right angles longitudinally, so that a crosssection would show the form of the letter U, as seen in Fig. 3.
  • This binding surrounds three edges of each slate-leaf, covering the edges and clasping the sides for a sufiicient distance, and is secured'by rivet-s to the tenons of the wood frame, which is permanently secured to the fourth edge.
  • a slate-leaf having a metal binding on three sides and the fourth side rigidly attached to a side of the frame of said leaf-slate, substantially as described.
  • a slate-leaf having a metal binding for three edges and a side of the frame of said draw-leaf slate for the other edge, substantially as described.

Description

S M RK DRAW LEAF. E.
Patented Apr. 1, 1890-.
Vllil UNITED STATES PATENT OFFICE.
SOLOMON MARKS, OF CINCINNATI, OHIO, ASSIGNOR TO THE PARAGON SLATE COMPANY, OF OHIO.
DRAW- LEAF SLATE.
SPECIFICATION forming part of Letters Patent No. 424,931, dated. April 1, 1890.
Applicati n fi September 30, 1889- Serial No. 325,522. (No model.)
' ure) for which Letters Patent were allowed me on July 6, 1889, Serial No. 311,332.
The object of my invention is to protect and strengthen the edges of the slate-leaves, to prevent buckling of said slate-leaves when made of non-rigid substance, and to form a smooth and even surface sliding in the grooves of the frame.
In the drawings, Figure 1 shows a slate com plete with one of the leaves partially withdrawn. Fig. 2 shows one of the leaves entirely withdrawn. Fig. 3 is an enlarged section of the edge of the slate-leaf and metal binding, taken at 00, Fig. 1.
Similar letters in the different drawings denote the same parts.
The binding designated by the letter a is made of thin strips of metal, bent twice at right angles longitudinally, so that a crosssection would show the form of the letter U, as seen in Fig. 3. This binding surrounds three edges of each slate-leaf, covering the edges and clasping the sides for a sufiicient distance, and is secured'by rivet-s to the tenons of the wood frame, which is permanently secured to the fourth edge.
Having thus described my invention, what I claim as-new, and desire to secure by Letters Patent, is as follows:
1. In a draw-leaf slate, a slate-leaf having a metal binding on three sides and the fourth side rigidly attached to a side of the frame of said leaf-slate, substantially as described.
2. In a draw-leaf slate, a slate-leaf having a metal binding for three edges and a side of the frame of said draw-leaf slate for the other edge, substantially as described.
The foregoing specification of my invention signed by me this 16th day of September, A. D. 1889.
SOLOMON MARKS.
WVitnesses:
J EPTHA GARRARD, P. J. CADWALLADER.
US424931D Draw-leaf slate Expired - Lifetime US424931A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679700A (en) * 1950-04-06 1954-06-01 Leon F Urbain Portable display board construction
US20030234204A1 (en) * 2002-06-20 2003-12-25 Reanea Lam Candy and gum containers
US20090082853A1 (en) * 2000-04-13 2009-03-26 Advanced Cardiovascular Systems Inc. Biodegradable drug delivery material for stent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679700A (en) * 1950-04-06 1954-06-01 Leon F Urbain Portable display board construction
US20090082853A1 (en) * 2000-04-13 2009-03-26 Advanced Cardiovascular Systems Inc. Biodegradable drug delivery material for stent
US20030234204A1 (en) * 2002-06-20 2003-12-25 Reanea Lam Candy and gum containers

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