GB660419A - Improvements in or relating to speech-communicating means - Google Patents

Improvements in or relating to speech-communicating means

Info

Publication number
GB660419A
GB660419A GB12873/49A GB1287349A GB660419A GB 660419 A GB660419 A GB 660419A GB 12873/49 A GB12873/49 A GB 12873/49A GB 1287349 A GB1287349 A GB 1287349A GB 660419 A GB660419 A GB 660419A
Authority
GB
United Kingdom
Prior art keywords
speech
opening
relating
diaphragm
window
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
GB12873/49A
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of GB660419A publication Critical patent/GB660419A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • E06B7/30—Peep-holes; Devices for speaking through; Doors having windows

Abstract

660,419. Ticket windows. BOLVINKEL, A. May 13, 1949 [May 15, 1948], 12873/49. Drawings to Specification. Class 20(iii) For hygienic reasons there is fitted in the speech opening of a ticket window a frame containmg a preferably transparent panel which extends across the opening and prevents the passage of air but acts as a diaphragm for the transmission of speech from one side of the window to the other. The diaphragm is clamped between two rings held together and hinged to the framework extending round the speech opening.
GB12873/49A 1948-05-15 1949-05-13 Improvements in or relating to speech-communicating means Expired GB660419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US660419XA 1948-05-15 1948-05-15

Publications (1)

Publication Number Publication Date
GB660419A true GB660419A (en) 1951-11-07

Family

ID=22066890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12873/49A Expired GB660419A (en) 1948-05-15 1949-05-13 Improvements in or relating to speech-communicating means

Country Status (1)

Country Link
GB (1) GB660419A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738788A (en) * 1952-04-08 1956-03-20 Willson Products Inc Respirator with speaking diaphragm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738788A (en) * 1952-04-08 1956-03-20 Willson Products Inc Respirator with speaking diaphragm

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