GB360612A - Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers - Google Patents

Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers

Info

Publication number
GB360612A
GB360612A GB3064730A GB3064730A GB360612A GB 360612 A GB360612 A GB 360612A GB 3064730 A GB3064730 A GB 3064730A GB 3064730 A GB3064730 A GB 3064730A GB 360612 A GB360612 A GB 360612A
Authority
GB
United Kingdom
Prior art keywords
erasers
motor
brushes
nozzle
casing
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
Application number
GB3064730A
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.)
REMO LARGIOLL
WILSON HENRY EHRET
Original Assignee
REMO LARGIOLL
WILSON HENRY EHRET
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.)
Filing date
Publication date
Priority to FR699846D priority Critical patent/FR699846A/en
Application filed by REMO LARGIOLL, WILSON HENRY EHRET filed Critical REMO LARGIOLL
Priority to GB3064730A priority patent/GB360612A/en
Publication of GB360612A publication Critical patent/GB360612A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00—Blackboard or slate cleaning devices
    • B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust

Landscapes

  • Cleaning In General (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

360,612. Cleaning blackboards &c. ADAMS, E., LARGIOLL, R., STRAWN, R. D., and EHRET, W. H., Mount Carmel, Pennsylvania, U.S.A. Oct. 13, 1930, No. 30647. [Class 8 (i).] Blackboard erasers are cleaned by rotary brushes within a casing from which the dust is withdrawn by suction ; the casing may have a hose attachment fitted with a nozzle for cleaning the gutter, holding chalks, along the base of the board or a nozzle containing a rotary pad for cleaning the board. The casing 1 is divided into compartments respectively containing the brushes 14 on the one hand and an electric motor 8 and a pair of fan casings 30 on the other. The fan casings extend about openings in the partition between motor and brushes, and these openings may be closed by a slide 32. The motor drives the brushes through a clutch. The erasers 20 are held by resilient forks on the casing bottom and its cover, and the switch is closed by putting the cover in place. The fan casings are connected by a T-shaped conduit 39, the stem of which rises through the cover and is closed when erasers are being cleaned by a cap. The fans. deliver downwards into dust drawers 34. A shaft driven from the motor is mounted within the stem,. so that by removing the cap and attaching a hose,. Fig. 7, containing a flexible shaft 48 driving a pad. 54, the blackboard may be cleaned. The nozzle or cap 52 containing the pad may be replaced by a simple nozzle 51 used to clean the gutter along the base of the board. Fig. 9 shows a modified erasercleaner in which a vertical cylinder contains a brush rotated by a motor 66 to clean erasers 71 fed by gravity through a door 70, dust being drawn off by a fan 67 and delivered to a suitable point by a spout 69.
GB3064730A 1930-10-13 1930-10-13 Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers Expired GB360612A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR699846D FR699846A (en) 1930-10-13 1930-07-22 Device for cleaning blackboards and blackboard wipers
GB3064730A GB360612A (en) 1930-10-13 1930-10-13 Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3064730A GB360612A (en) 1930-10-13 1930-10-13 Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers

Publications (1)

Publication Number Publication Date
GB360612A true GB360612A (en) 1931-11-12

Family

ID=10310904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3064730A Expired GB360612A (en) 1930-10-13 1930-10-13 Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers

Country Status (2)

Country Link
FR (1) FR699846A (en)
GB (1) GB360612A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789306A (en) * 1954-05-26 1957-04-23 Norman A Kath Vacuum cleaner attachment
US3192547A (en) * 1963-10-25 1965-07-06 Robert E Nahrstedt Scrubbing machine with cleaning attachment therefor
CN106004171A (en) * 2016-07-02 2016-10-12 深圳市中幼国际教育科技有限公司 Teaching blackboard capable of automatically wiping dust
CN115500609A (en) * 2022-10-14 2022-12-23 江苏海事职业技术学院 Electrical control system practical training teaching device and use method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083414A (en) * 1980-09-12 1982-03-24 Nakano Bussan Co Ltd Blackboard wiper assembly
ES282985Y (en) * 1984-11-28 1986-01-16 Lobez Saguez Manuel DEVICE FOR DELETING WAXINGS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789306A (en) * 1954-05-26 1957-04-23 Norman A Kath Vacuum cleaner attachment
US3192547A (en) * 1963-10-25 1965-07-06 Robert E Nahrstedt Scrubbing machine with cleaning attachment therefor
CN106004171A (en) * 2016-07-02 2016-10-12 深圳市中幼国际教育科技有限公司 Teaching blackboard capable of automatically wiping dust
CN115500609A (en) * 2022-10-14 2022-12-23 江苏海事职业技术学院 Electrical control system practical training teaching device and use method
CN115500609B (en) * 2022-10-14 2023-11-24 江苏海事职业技术学院 Practical training teaching device of electrical control system and application method

Also Published As

Publication number Publication date
FR699846A (en) 1931-02-20

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