US320367A - School-slate - Google Patents

School-slate Download PDF

Info

Publication number
US320367A
US320367A US320367DA US320367A US 320367 A US320367 A US 320367A US 320367D A US320367D A US 320367DA US 320367 A US320367 A US 320367A
Authority
US
United States
Prior art keywords
slate
cords
frame
sides
school
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 US320367A publication Critical patent/US320367A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/76—Making of isolation regions between components
    • H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
    • H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
    • H01L21/76229—Concurrent filling of a plurality of trenches having a different trench shape or dimension, e.g. rectangular and V-shaped trenches, wide and narrow trenches, shallow and deep trenches

Definitions

  • the invention relates to improvements in school-slates; and it consists, essentially, in securing firmly to the edge of the slate-frame some inexpensive soft or elastic material which will deaden the noise of the motion of the slate.
  • Fig. 2 is a cross-section of the two cords or bundles of cords, forming part of Fig. 3 is a plan view of the Fig. 4 is a plan view of l is a transverse section of a slate-frame.
  • Fig. 6 is a view of a part of the 1 slate so sectioned as to show the invention attached to the frame. of the slate-frame with the invention attached.
  • Fig. 7 is a cross-section i Fig. '8 is a similar view of the same, with a modification of the invention attached.
  • A designates the slate-frame inclosing the slate A.
  • the outer edge of the slateframe is provided with the lon gitudinal groove,
  • B B are si-miframe.
  • the web E is of such width that when bent down against the sides and bottom of the groove 1) the cords or rolls, B, will be drawn forcibly together.
  • the manner of securing the invention to the frame is as follows: The web E is laid over the groove D, with the cords or rolls B resting on the corners of the edge of the slateframe. The strip 0 is then bent more convex, so that it can be readily introduced wit/:1 its concave side downward into the groove D ⁇ Vhen the strip is at the bottom of the-groove,itis released, and, springing outward, its edges bind the web against the sides of the groove, as shown in Fig. 7. The strip might be introduced with its convex surface downward, and would hold the web; but the former manner holds the web tighter. When the cords or rolls B B are thus secured to the frame, their adjacent sides impinge on each other, and the outer sides stand outward beyond the sides of the slate-frame. Thus the edge and sides of the frame are prc vented from making noise by contact with the desk.
  • the cords or rolls B are replaced by the cords b, much smaller in diameter.
  • a cord stiflicient in diameter to drive the outer sides of lar endless cords or rolls, consisting of any l the cords, when pressed between the latter, outward beyond the sides of the slate-frame.
  • the cord 10 is covered by the felting g, or other suitable material, and the strip Gis inserted between the cord and felting, as shown. The strip acts so as to bind both the felting and web E against the sides of the notch D.

Description

(N0 ModeL) E. L. KRAUS.
SCHOOL SLATE. No. 320,367. Patented June 16, 1885.
llz' I Unites States Patent @rrrce.
EDVARD L. KRAUS, OF SLATINGTON, PENNSYLVANIA.
SCHOOL-SLATE.
SPECIFICATION forming part of Letters Patent No. 320,367, dated June 16, 1885.
(No model.)
To all whom it may concern Be it known that I, EDWARD L. KRAUS, a citizen of the United States, of the borough State of Pennsylvania, have invented certain new and useful Improvements in SchoolSl-ates, of which the following is a specification.
The invention relates to improvements in school-slates; and it consists, essentially, in securing firmly to the edge of the slate-frame some inexpensive soft or elastic material which will deaden the noise of the motion of the slate.
vex in transverse section, and of somewhat greater width than the groove D in the slateof Slatington, in the county of Lehigh and It further consists in the construction and novel arrangement of certain parts hereinafter described, and pointed out in the appended claims.
In the accompanying drawings, Figure 1 repabove the web E.
resents a plan view of a slate with the invention attached.
Fig. 2 is a cross-section of the two cords or bundles of cords, forming part of Fig. 3 is a plan view of the Fig. 4 is a plan view of l is a transverse section of a slate-frame. Fig. 6 is a view of a part of the 1 slate so sectioned as to show the invention attached to the frame. of the slate-frame with the invention attached.
Fig. 7 is a cross-section i Fig. '8 is a similar view of the same, with a modification of the invention attached.
Referring to the accompanying drawings by letter, A designates the slate-frame inclosing the slate A. The outer edge of the slateframe is provided with the lon gitudinal groove,
D, shown in section in Fig. 5. B B are si-miframe. The web E is of such width that when bent down against the sides and bottom of the groove 1) the cords or rolls, B, will be drawn forcibly together.
The manner of securing the invention to the frame is as follows: The web E is laid over the groove D, with the cords or rolls B resting on the corners of the edge of the slateframe. The strip 0 is then bent more convex, so that it can be readily introduced wit/:1 its concave side downward into the groove D \Vhen the strip is at the bottom of the-groove,itis released, and, springing outward, its edges bind the web against the sides of the groove, as shown in Fig. 7. The strip might be introduced with its convex surface downward, and would hold the web; but the former manner holds the web tighter. When the cords or rolls B B are thus secured to the frame, their adjacent sides impinge on each other, and the outer sides stand outward beyond the sides of the slate-frame. Thus the edge and sides of the frame are prc vented from making noise by contact with the desk.
In the modification shown in Fig. 8 the cords or rolls B are replaced by the cords b, much smaller in diameter. to is a cord stiflicient in diameter to drive the outer sides of lar endless cords or rolls, consisting of any l the cords, when pressed between the latter, outward beyond the sides of the slate-frame. The cord 10 is covered by the felting g, or other suitable material, and the strip Gis inserted between the cord and felting, as shown. The strip acts so as to bind both the felting and web E against the sides of the notch D.
I am aware that muliling material in cord form, has been attached to school-slate frames by means of notches formed therein, and such construction I do not claim, broadly but,
Having described my invention, I claim 1. The combination, with the frame of a slate having a longitudinal recess or notch around its edge, of endless cords of soft elastic material the diameters of which united have a greater width than that of the frame, and
Webs uniting the said cords of sufficient Width with the notch or recess D, with the cords 01' when secured Within the notch adjacent to its rolls B, Web or uniting-cord E, and spring-strip bottom and sides to hold the cords down on the edge of the slate-frmne with their adjacent sides pressed together, substantially as speci- Witnesses: fled.
2. The combination of thefrain'ie A, provided 0, substantially as specified. 1o
EDYVARD L. KRAUS.
A. BARTHOLOMEW', JOHN G. LENTZ.
US320367D School-slate Expired - Lifetime US320367A (en)

Publications (1)

Publication Number Publication Date
US320367A true US320367A (en) 1885-06-16

Family

ID=2389508

Family Applications (1)

Application Number Title Priority Date Filing Date
US320367D Expired - Lifetime US320367A (en) School-slate

Country Status (1)

Country Link
US (1) US320367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001179A1 (en) * 2002-06-27 2004-01-01 Kalbach Edward Van Lee Three-way eyeglasses retainer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001179A1 (en) * 2002-06-27 2004-01-01 Kalbach Edward Van Lee Three-way eyeglasses retainer

Similar Documents

Publication Publication Date Title
US320367A (en) School-slate
US636142A (en) Secondary battery.
US499629A (en) Weather-strip
US502203A (en) Stovepipe-damper
US219531A (en) Improvement in machine-belting
US159681A (en) Improvement in slate-frames
US816490A (en) Curtain-pole.
US885474A (en) Spring-seat.
US659168A (en) Shoe-polisher.
US873791A (en) Buckle.
US500352A (en) Strengthening-strip for trunks
US529867A (en) Noiseless slate
US684561A (en) Carpet-lining.
US540049A (en) Damper
US458319A (en) Device for repairing broken slats
US1086809A (en) Polishing device.
US271224A (en) Paul allen curtis
US523012A (en) Henry sewrey
US281786A (en) Chables nelson
US334371A (en) Spindle-bolster
US644293A (en) Blackboard-rubber.
US454439A (en) Metal door-mat
US979158A (en) Bottom for hammocks.
USD36020S (en) Design for a lace curtain
US498456A (en) Half to jacob s