The field created by a permanent magnet would therefore be too weak to retain the outside cleaning element against the pane during the cleaning operation. In the prior devices, the magnet was located inside the window pane, and a pad containing a magnetically-permeable metal was used on the outside of the window pane. This is evidently due to the fact that a device incorporating permanent magnets and made according to the teachings of the prior art could not operate. Up to this time, there has been no evidence of a cleaning device of this type which was provided with permanent magnets, although the use of permanent magnets would enable such devices to be sold at a low cost. Y10T24/32- Buckles, buttons, clasps, etc.Y10T24/00- Buckles, buttons, clasps, etc.Y10T- TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION.Y10S293/06- Magnetic fender securing devices.Y10S206/00- Special receptacle or package.Y10S- TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS AND DIGESTS.Y10- TECHNICAL SUBJECTS COVERED BY FORMER USPC.Y- GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS AND DIGESTS.A47L1/12- Hand implements for cleaning both sides simultaneously.A47L- DOMESTIC WASHING OR CLEANING SUCTION CLEANERS IN GENERAL.A47- FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCTION CLEANERS IN GENERAL.238000002360 preparation method Methods 0.000 description 2.229910052751 metal Inorganic materials 0.000 description 2.229910052738 indium Inorganic materials 0.000 description 2.RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2.229910052802 copper Inorganic materials 0.000 description 2.239000012459 cleaning agent Substances 0.000 description 2.REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 2.229910045601 alloy Inorganic materials 0.000 description 2. 229910001369 Brass Inorganic materials 0.000 description 2.238000004519 manufacturing process Methods 0.000 description 4.229910000828 alnico Inorganic materials 0.000 description 4.XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by D Andrea Rocco filed Critical D Andrea Rocco Priority to US91660A priority Critical patent/US2507559A/en Application granted granted Critical Publication of US2507559A publication Critical patent/US2507559A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US91660A Inventor D Andrea Rocco Original Assignee D Andrea Rocco Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Magnetic window-cleaning deviceÄownload PDF Info Publication number US2507559A US2507559A US91660A US9166049A US2507559A US 2507559 A US2507559 A US 2507559A US 91660 A US91660 A US 91660A US 9166049 A US9166049 A US 9166049A US 2507559 A US2507559 A US 2507559A Authority US United States Prior art keywords cleaning window pane cleaning element magnets magnet Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2507559A - Magnetic window-cleaning device US2507559A - Magnetic window-cleaning device
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