Kingsley was an Australian brand used by various manufacturers from 1934 till 1971.
Below is a chronology of the various, verified, known manufacturers of the Kingsley brand.

Howard Kingsley Love (1896 - 1948)

Love served as a lieutenant in the AIF during WW1 and later as a pilot in the Australian Flying Corps. He was shot down behind German Lines and became a POW until the war ended. As a keen radio amateur he was granted an experimental licence with the call sign A-3BM and later VK3BM & VK3KU after WW1.

He was foundation member of the Wireless Institute of Australia and served several terms as Victorian and Federal president.[8]

Kingsley Teleradio Constructions Pty., Ltd. (1934 - 1937)
249-251 Spring Street, Melbourne, Victoria (1934 - 1937)

Production: 1934 - 1937

Founded by Howard Kingsley Love in 1934 after leaving Radiovision (Aust) Pty Ltd.[1][2]
Manufactured and sold Kingsley radios and diathermy medical equipment.

Kingsley Radio Pty. Ltd. (1937-1949)
249-251 Spring Street, Melbourne, Victoria (1937 - 1939)
380 St. Kilda Road, Melbourne (1940 - 1949)
225 Trafalgar Street, Petersham, NSW (1944 - 1947)
17 Bond St, Sydney, NSW (1948)

Production: 1937 - 1949

Kingsley Radio Pty. Ltd. was formed by a takeover in August 1937 of Kingsley Teleradio Constructions with Howard Kingsley Love as a director.[3]

The company manufactured Kingsley radios and radio parts, including coils, tuning units and, for a short time, speakers. They developed an application of ferrite particles to RF circuits, leading to the kingsley “Ferroclad” & “Ferrotune” technology. They are best known for their production, during WWII, of the KCR-11 (AR7) communications receiver.

During World War Two they moved from Spring Street, Melbourne to a larger factory at St. Kilda Road, Melbourne, opposite the Shrine of Remembrance. After the war, another factory was opened in Petersham, Sydney due to the majority of Australia's electronics industry being in Sydney.[4]

Sadly, in 1948 Howard Love died from heart failure due to overwork and stress. Shortly after, Kingsley Radio was closed down in 1949.[5]

The premises at 380 St. Kilda Road were initially taken over by Aegis Manufacturing Company and A & R Electronics (transformers) and in July 1950 by J. H. Magrath & Co. Pty. Ltd. as a car radio installation and service station.[6][7]

Kingsley Radio, Melbourne Victoria (1953? - 1957?)
210 Alexandra Parade, Clifton Hill, Victoria
3 Cornell Place, Carlton, Victoria

Manufactured car radios[9] and also manufactured RF and IF coils.[11]

Kingsley Radio Pty., Ltd. (1960? - 1971?)
75 Budd Street, Collingwood, Victoria
58a Gipps Street, Collingwood Victoria

Manufacturers and agents for imported Hitachi radios.[10]

[1] News (SA) Aug 3, 1932,  Page 7.
[2] Advocate (Vic.) Nov 29, 1934  Page 7.
[3] The Age (Vic.) Aug 5, 1937,  Page 8.
[4] Australian Radio World, Dec 1944, Page 30.
[5] The Argus (Vic.) May 7, 1949,  Page 16.
[6] Record (Vic.) Feb 4, 1950,  Page 7.
[7] The Age (Vic) Jul 6, 1950,  Page 7.
[8] The Age (Vic.) Jul 30, 1948, Page 2.
[9] The Argus ( Vic.) Apr 18, 1956, Page 10.
[10] The Australian Women's Weekly, Sep 25, 1963, Page  115.
[11] Australian radio & Electronics, Feb 1951, Page 15.