US360327A - School-slate - Google Patents

School-slate Download PDF

Info

Publication number
US360327A
US360327A US360327DA US360327A US 360327 A US360327 A US 360327A US 360327D A US360327D A US 360327DA US 360327 A US360327 A US 360327A
Authority
US
United States
Prior art keywords
slate
frame
attaching
school
strip
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
Application number
Publication date
Application granted granted Critical
Publication of US360327A publication Critical patent/US360327A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/01—Manufacture or treatment
    • H10W10/011—Manufacture or treatment of isolation regions comprising dielectric materials
    • H10W10/014—Manufacture or treatment of isolation regions comprising dielectric materials using trench refilling with dielectric materials, e.g. shallow trench isolations
    • H10W10/0143—Manufacture or treatment of isolation regions comprising dielectric materials using trench refilling with dielectric materials, e.g. shallow trench isolations comprising concurrently refilling multiple trenches having different shapes or dimensions
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/10—Isolation regions comprising dielectric materials
    • H10W10/17—Isolation regions comprising dielectric materials formed using trench refilling with dielectric materials, e.g. shallow trench isolations

Definitions

  • the object of my invention is to provide a slate with a novel frame of a noiseless material, which is at the same time impervious to water or moisture, so that the frame does not become dirty and sticky as with ordinary woolen muffling-strips.
  • FIG. 1 represents a face View of a slate provided with a water-proof muftling-strip.
  • Fig. 2 is a transverse section thereof in the plane 00 m, Fig. 1.
  • Fig. 3 is a cross-section of the attaching frame.
  • the letter A designates a piece of slate such as is ordinarily employed in the manufacture of slates
  • B is the mufflingstrip
  • O is the attaching-frame.
  • the attaching-frame is made of thin sheet metal, which is bent so that it can be passed over the'edges of the slate, and it is provided in its length with numerous burrs or projections, c,which project inward toward the slate, and can be formed by depressing the material at selected points.
  • the mufliing-strip consists of a long piece of a water-proof material, such as oil-cloth, rubber, and the like, and to secure the same to the edges of the slateits 1ongitudinal edges 1) b are introduced between the (No model.)
  • attaching-frame and the slate and the attaching-frame is then pressed together upon the ac slate, whereby the muii'ling-strip is securely clamped all around its edges.
  • the burrs con the attaching-frame penetrate the material of the inull'ling-strip and add greatly to the security of the fastening.

Landscapes

  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

(No Model.)
P. O. RITCHIE.
SCHOOL SLATE.
No. 360,327. Patented Mar. 29, 1887.
WITNES sE 4 C I, UVVENTOR 'E-ekem QR-Lmh'w- N. PETERS. Phowumu n han Walhillglom u. C.
UNITED STATES I ATENT FFICE.
PETER O. RITCHIE, OF FREMONT, NEV YORK.
SCHOOL-SLATE.
SPECIFICATION forming part of Letters Patent No. 360,327, dated March 29, 1887.
A pplicntion filed June 10, 1886. Serial No. 204,747.
T 0 all whom it may concern:
Be it known that I, PETER O. RITCHIE, a citizen of the United States, residing at Tremont, in the county of New York, in the State of New York, have invented new and useful Improvements in Slates, of which the following is a specification.
The object of my invention is to provide a slate with a novel frame of a noiseless material, which is at the same time impervious to water or moisture, so that the frame does not become dirty and sticky as with ordinary woolen muffling-strips.
The general construction of my slate'frame is more fully pointed out in the following specification and claim, and illustrated in the accompanying drawings, in which Figure 1 represents a face View of a slate provided with a water-proof muftling-strip. Fig. 2 is a transverse section thereof in the plane 00 m, Fig. 1. Fig. 3 is a cross-section of the attaching frame.
Similar lettersindicate corresponding parts.
In the drawings, the letter A designates a piece of slate such as is ordinarily employed in the manufacture of slates, B is the mufflingstrip, and O is the attaching-frame.
The attaching-frame is made of thin sheet metal, which is bent so that it can be passed over the'edges of the slate, and it is provided in its length with numerous burrs or projections, c,which project inward toward the slate, and can be formed by depressing the material at selected points. The mufliing-strip consists of a long piece of a water-proof material, such as oil-cloth, rubber, and the like, and to secure the same to the edges of the slateits 1ongitudinal edges 1) b are introduced between the (No model.)
attaching-frame and the slate, and the attaching-frame is then pressed together upon the ac slate, whereby the muii'ling-strip is securely clamped all around its edges. The burrs con the attaching-frame penetrate the material of the inull'ling-strip and add greatly to the security of the fastening.
Heretofore muli'ling-strips have been made of llannel or other noiseless material, all of which are more or less liable to absorb moisture-for instance, when the slate is washed with a sponge moistened with wateratter which dust or dirt readily adheres to the muffiing-strip, and it becomes very unsightly and also sticky. This I avoid by making the muftling-strip ofa water-proofmaterial,which does not absorb the water which is used in cleaning 5 the slate, and therefore always presents a neat, bright, and clean appearance, while such a inufl'lingstrip is as durable as the ordinary strip.
\Vhat I claim as new, and desire to secure by Letters Patent, is-
The combination, with a slate, of the attaching-frame extending around the edges of the slate and embracing the same, burrs or projections in said frame, and a muftlingstrip over the attaching frame, the edges of which lie between the slate and the attaching-frame and are penetrated by the burrs or projections of the latter, substantially as shown and described.
In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.
PETER G. RITCHIE. [I.. s.]
\Vitnesses:
A. FABER DU FAUR, J r., W. HAUFF.
US360327D School-slate Expired - Lifetime US360327A (en)

Publications (1)

Publication Number Publication Date
US360327A true US360327A (en) 1887-03-29

Family

ID=2429363

Family Applications (1)

Application Number Title Priority Date Filing Date
US360327D Expired - Lifetime US360327A (en) School-slate

Country Status (1)

Country Link
US (1) US360327A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170144257A1 (en) * 2015-11-25 2017-05-25 Nippon Steel & Sumikin Welding Co., Ltd. FLUX-CORED WIRE FOR Ar-CO2 MIXED GAS SHIELDED ARC WELDING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170144257A1 (en) * 2015-11-25 2017-05-25 Nippon Steel & Sumikin Welding Co., Ltd. FLUX-CORED WIRE FOR Ar-CO2 MIXED GAS SHIELDED ARC WELDING

Similar Documents

Publication Publication Date Title
US2794757A (en) Beading, moulding or the like
US360327A (en) School-slate
US660886A (en) Combination shoe cleaning, blacking, and polishing device.
US1423143A (en) Strip for floor coverings and the like
US1011642A (en) Flexible molding.
US285771A (en) Caleb e
US488562A (en) Carpet-sweeper
US665632A (en) Attachment for brooms or brushes.
US1083860A (en) Polishing appliance.
US590909A (en) Broom-handle
US1028211A (en) Nail-brush.
US639479A (en) Mop.
US129935A (en) Improvement in dust-pans
US462943A (en) ferguson
US989409A (en) Stair-covering.
US423534A (en) Noiseless blackboard-eraser
US865762A (en) Polishing-brush.
US1221261A (en) Scraper for crumb-brushes.
US528754A (en) Sylvania
US421839A (en) Stair-pad
US1270151A (en) Weather-strip.
US375553A (en) Carriage-top
US196167A (en) Improvement in brushes
US945061A (en) Manicure-buffer.
US901693A (en) Rug holder or stiffener.