US485802A - Slate-muffler - Google Patents

Slate-muffler Download PDF

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Publication number
US485802A
US485802A US485802DA US485802A US 485802 A US485802 A US 485802A US 485802D A US485802D A US 485802DA US 485802 A US485802 A US 485802A
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Prior art keywords
slate
pads
muffler
rings
holder
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    • 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 object of myinvention is to produce an improved muffler for school-slates which may be readily applied to the slate-frame and shall add very little to the cost of the slate.
  • various devices have been used for this purpose, such as strips of cloth or rubber secured to the frame by tacks or cemeutror corner-pieces of rubber molded to fit thecorner of the frame and secured in place by various means. All of these devices have failed to come into common use by reason of their expensiveness or of their liability to become detached.
  • My invention provides a holder by which muftling-pads cut directly from a sheet of felt or rubber or other suitable material are held securely in place Without being liable to become detached.
  • Figure l is a front view of a portion of a slate having my improved muffler applied thereto.
  • Fig. 2 is a section on the line x of Fig. 1.
  • Fig. 3 is a perspective View of the improved multler detached.
  • the slate A and frame B may be of anyordinary description, and the improved muflier may be applied thereto either at the corners, as shown in Fig. l, or at any other convenient points on the ends or sides.
  • the muffler consists, essentially, of a pad or pads C C, of rubber, felt, or other suitable material, cut directly from the sheet or molded or otherwise formed in any convenient manner, and a holder D therefor, which is cutor stamped or struck out from thin sheet metal.
  • the holder consists of two rings d d, upturned and inwardly inclined, as shown, and a connectingband CZ.
  • Ears (Z2 d2 may be formed With the rings, and both the ears and the connectingband may be perforated to receive the tacks d3, by which the muiiier is secured to the frame.
  • Ears d4 may also be formed with the rings and adapted to be turned inwardly to secure the pads Within the rings, so that the device may be sold in a form ready for appli cation to the slate.
  • the holder D is itself inexpensive to manufacture; but the chief saving is in the use of pads, which require very little manipulation or waste of material in their manufacture.
  • pads as circular and have referred to the holder as formed with a ring to receive the pad; but itis obvious that the pad and ring may be made in any other convenient form.

Description

(No Model.) v
R. KOHLER.
SLATB MUFPLER.
Patented Nov. 8, 1892.
.lY l
EUNITED STATES PATENT OFFICE.
RICHARD KOHLER, OF BROOKLYN, NEW YORK.
SLATE-NIUFFLER.
SPECIICATION forming' part 0f Letters Patent NO. 485,802, dated November 8, 1892.
Application filed May 7, 1892. Serial No. 432,112. (No model.)
To all whom t may concern:
Be it known that I, RICHARD KOHLER, of Brooklyn, in the county of Kings and State of New York, have invented a new and usefullrnprovement in Slate-Mufflers; and I do hereby declare that the following is a full and eXact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.
The object of myinvention is to produce an improved muffler for school-slates which may be readily applied to the slate-frame and shall add very little to the cost of the slate. Heretofore various devices have been used for this purpose, such as strips of cloth or rubber secured to the frame by tacks or cemeutror corner-pieces of rubber molded to fit thecorner of the frame and secured in place by various means. All of these devices have failed to come into common use by reason of their expensiveness or of their liability to become detached.
My invention provides a holder by which muftling-pads cut directly from a sheet of felt or rubber or other suitable material are held securely in place Without being liable to become detached.
In the drawings, Figure l is a front view of a portion of a slate having my improved muffler applied thereto. Fig. 2 is a section on the line x of Fig. 1. Fig. 3 is a perspective View of the improved multler detached.
The slate A and frame B may be of anyordinary description, and the improved muflier may be applied thereto either at the corners, as shown in Fig. l, or at any other convenient points on the ends or sides. The muffler consists, essentially, of a pad or pads C C, of rubber, felt, or other suitable material, cut directly from the sheet or molded or otherwise formed in any convenient manner, and a holder D therefor, which is cutor stamped or struck out from thin sheet metal. The holder consists of two rings d d, upturned and inwardly inclined, as shown, and a connectingband CZ. Ears (Z2 d2 may be formed With the rings, and both the ears and the connectingband may be perforated to receive the tacks d3, by which the muiiier is secured to the frame. Ears d4 may also be formed with the rings and adapted to be turned inwardly to secure the pads Within the rings, so that the device may be sold in a form ready for appli cation to the slate. The holder D is itself inexpensive to manufacture; but the chief saving is in the use of pads, which require very little manipulation or waste of material in their manufacture.
I have herein shown the pads as circular and have referred to the holder as formed with a ring to receive the pad; but itis obvious that the pad and ring may be made in any other convenient form.
I claim as my inventionl. The herein-described muftier for slates, comprising pads and a holder therefor having rings upwardly and inwardly inclined to receive the pads and united by a connectingband, substantially as shown and described.
2. In a slate-muffler, the combination of pads and a holder therefor, consisting of upwardly and inwardly tapering rings and united by a band, said rings having ears bent inwardly to hold the pads therein, substantially as shown and described.
In testimony whereof I have signed my name to this specification iu the presence of two subscribing Witnesses.
RICHARD KOHLER. Witnesses:
A. N. J EsBERA, A. WIDDER.
US485802D Slate-muffler Expired - Lifetime US485802A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487586A (en) * 1981-12-16 1984-12-11 Alliance Europe S.A. Framed board with writing surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487586A (en) * 1981-12-16 1984-12-11 Alliance Europe S.A. Framed board with writing surface

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