US631857A - Table for holding plate-glass. - Google Patents

Table for holding plate-glass. Download PDF

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Publication number
US631857A
US631857A US66944098A US1898669440A US631857A US 631857 A US631857 A US 631857A US 66944098 A US66944098 A US 66944098A US 1898669440 A US1898669440 A US 1898669440A US 631857 A US631857 A US 631857A
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United States
Prior art keywords
glass
porous
holding plate
marsh
vacuum
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Expired - Lifetime
Application number
US66944098A
Inventor
George A Marsh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARSH PLATE GLASS Co
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MARSH PLATE GLASS Co
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by MARSH PLATE GLASS Co filed Critical MARSH PLATE GLASS Co
Priority to US66944098A priority Critical patent/US631857A/en
Application granted granted Critical
Publication of US631857A publication Critical patent/US631857A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/27—Work carriers
    • B24B37/30—Work carriers for single side lapping of plane surfaces

Definitions

  • Tu Noam; vnsns co.. mmc-umm. wunlunmn. n, c.
  • My invention relates to the vacuum-tables employed forholding plate-glass during grinding, rubbing, or polishing; and it consists in an improved construction of such tables and the packing employed thereon, as hereinafter more fully described, and set forth in the claims.'
  • 2 represents a hollow bed or table having a plain fiat top connected by holes 3 with the vacuum-chamber 4, which communicates with any suitable vacuumforming apparatus by a pipe 5.
  • a table having channels extending transversely Fig. 3 is a are shown and described in my prior patents. It willv be understood that in using such form of table the channels in the ribs 8 Will be covered with strips of non-porous packing and that the porous filling Will be arranged over the vacuum-cells Within the non-porous packing. When pieces of cloth or mole-skin of the same size as the table are employed, the portions overlying the channeled ribs, as Well as the edges, should be rendered nonL porous, as hereinbefore described.
  • a glass-holding table having its top connected With a vacuum apparatus, a non-porous gasket arranged to be placed beneath the edge portions of the glass sheet, and a porous filling Within the gasket.
  • a glass-holding table having its top connected with a vacuum apparatus, a non-porous gasket arranged to be placed beneath the portions of the glass sheets to be sealed and a porous illin g of substantially the same thickness as the gasket and integral therewith and arranged to support the intermediate body portion of the glass, substantially as set forth.
  • a glass-holding table provided with intersecting channeled ribs, non-.porous gaskets arranged above the channeled ribs and porous llings arranged intermediate of the gaskets, substantially as set forth.

Description

No. 63I,a57.
Patented Aug. 29, |899. G. A. MARSH.
TABLE FOR HOLDING PLATE GLASS.
(Application filed Feb. 7, 1898.I
2 Sheets-Sheet (No Model.)
1 I I I I I I I I I I I I I I I I I I l I I I I I I I I I I I I WITNESSES TN: Noam: rtrsns oo. Immo-uws.. wAsIgIINDmN. n. c.
No. 631,857. Patente Aug. 29, |899. G. A. MARSH.
TABLE FUR HLDENG P' E GLASS.
' (Application led Fe'b. B.)
(No Model.) 2 Sheets-Sheet 2 tgl@ m *l WITNESSES:
Tu: Noam; vnsns co.. mmc-umm. wunlunmn. n, c.
UNITED STATES PATENT OFFICE.
GEORGE A. MARSH, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE MARSH PLATE GLASS COMPANY, OE SAME PLACE.
TABLE FOR HOLDING PLATE-iGLASS.
SPECIFICATION formingpart of Letters Patent No. 631,857, dated August 29, 1899-.
Application filed February 7, 1898. Serial No. 669,440. (No model.)
T0y @ZZ whom, t may concern:
Be it known that I, GEORGE A. MARSH, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a nevir and useful Improvement in Tables for Holding Plate-Glass, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in Which- Figure l is a top plan view of a table constructed in accordance With my invention. Fig. 2 is a similar View, partly broken away, with the glass in place thereon. transverse section of Fig. 2'. Fig. Il is a top plan view showing the use of my invention with a modified form or construction of supporting-table.
My invention relates to the vacuum-tables employed forholding plate-glass during grinding, rubbing, or polishing; and it consists in an improved construction of such tables and the packing employed thereon, as hereinafter more fully described, and set forth in the claims.'
In the drawings, 2 represents a hollow bed or table having a plain fiat top connected by holes 3 with the vacuum-chamber 4, which communicates with any suitable vacuumforming apparatus by a pipe 5.
In place of a flat plain top I may employ a table having channels extending transversely Fig. 3 is a are shown and described in my prior patents. It willv be understood that in using such form of table the channels in the ribs 8 Will be covered with strips of non-porous packing and that the porous filling Will be arranged over the vacuum-cells Within the non-porous packing. When pieces of cloth or mole-skin of the same size as the table are employed, the portions overlying the channeled ribs, as Well as the edges, should be rendered nonL porous, as hereinbefore described.
I claim- 1. A glass-holding table having its top connected With a vacuum apparatus, a non-porous gasket arranged to be placed beneath the edge portions of the glass sheet, and a porous filling Within the gasket.
2.l A glass-holding table having its top connected with a vacuum apparatus, a non-porous gasket arranged to be placed beneath the portions of the glass sheets to be sealed and a porous illin g of substantially the same thickness as the gasket and integral therewith and arranged to support the intermediate body portion of the glass, substantially as set forth.
3. A glass-holding table provided with intersecting channeled ribs, non-.porous gaskets arranged above the channeled ribs and porous llings arranged intermediate of the gaskets, substantially as set forth.
In testimony whereof I have hereunto set my hand.
GEORGE A. MARSH.
Witnesses:
G. I. HoLDsHIP, C. E. MAOKOWN.
US66944098A 1898-02-07 1898-02-07 Table for holding plate-glass. Expired - Lifetime US631857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US66944098A US631857A (en) 1898-02-07 1898-02-07 Table for holding plate-glass.

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US66944098A US631857A (en) 1898-02-07 1898-02-07 Table for holding plate-glass.

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US66944098A Expired - Lifetime US631857A (en) 1898-02-07 1898-02-07 Table for holding plate-glass.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009539A (en) * 1975-06-16 1977-03-01 Spitfire Tool & Machine Co., Inc. Lapping machine with vacuum workholder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009539A (en) * 1975-06-16 1977-03-01 Spitfire Tool & Machine Co., Inc. Lapping machine with vacuum workholder

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