History
Innovations are our constant companion and have been for more than 90 years. Immerse yourself in our company history and get to know us.
MILESTONES
All companies have a story - some make history. KRONENBERG is one of the pioneering companies in the lift industry. Accompany us on a journey through the history of the company - with our milestones in the KRONENBERG company chronicle.
2024-2021
2023
- DL(F)2MO - door interlock with motorized operation for double-leaf doors (also with level of protection IP54 available)
2022
- WPM system for control of motorized door interlocks
- Key encoding keypad TC4
2021
- Electrical contact bridge EKB
- New website in new CI
2020-2011
2020
- Launch of new company logo and claim, digitalization
- Pictogram PK-V
- UL-certification CL(F)MO-UL
2019
- New Corporate Identity, booth interlift 2019, new catalogues “door interlocks“ and “switches“, video tutorials YouTube
- Latch plate BL-V with large clearance of the bolt
2018
- TFT-displays (3.2″ / 5″), TFT-Bus module with shaft wiring
- Motorized door interlock CL(F)MO
- Motorized retiring cam RKMO
2017
- Triangle emergency release units and Bowden cable connections for all door interlocks
- New versions and type approval certificates for all door interlocks according to EN81-20/50
- Takeover of the Management by Mike Braun
2016
- Compact door interlock CL(F)
2015
- Motorized door interlock DL(F)1MO
2014
- Plug-in pushbutton system RP35
- LIN-Bus call button with integrated travel continuation indicator
2013
- TFT Displays (7“ / 4.3 “)
2012
- Door interlock EL(F)1 with monitored emergency release according to EN 81-21
2011
- Stamped pushbutton pressels for the pushbutton systems UT and XL
- Floor position indicator PML4 for running texts
- Pushbuttons RVB11 (convex) and RVD11 (flush with the faceplate) with protection against vandalism
- Shaft copying for digital displays (DSK1)
- Pushbutton system UT with waterprotection (IP54)
2010-2001
2010
- Cooperation with Safeline
2009
- Door switch and switch for locking mechanism HZTK
- Door interlock DLF1EM with monitored emergency release (EN 81-21)
- Standard pushbutton system UT
2008
- Digital speech unit DSA2
- Door interlock for French building construction norm (MV24)
2007
- 15th November 2007: 75th company anniversary with international customers, suppliers, partners, representatives of the trade press and shareholders.
- Pictrograms for escalators
- Door interlock for EN 81-71
2005
- Add-on unit for EN 81-71 and EN 81-21
2004
- Large sized pushbuttons XL fixed on the faceplate according to EN 81-70
- CANopen-adapter CBK1
2003
- Door interlock with electromagnetic actuation DL(F)1EM
2001
- Round pushbutton RQ 30
2000-1991
1999
- Illuminated fields with LED-illumination
1998
- Dot matrix display PMA
1997
- Key encoding keypad TC3
- Shaft switch ESK
- Pushbutton system QA/QP
1996
- Safety switch with 3 contacts WZK
1995
- Door switch (forced contact) HZS
1994
- Minimum travel pushbutton with prewiring
1993
- Projecting operating panels in handicapped accessible version
1992
- Waterprotected door switch with actuation from any direction WZA
1990-1981
1989
- Explosion-proof devices
1988
- Participation at the first fair for lift accessories in Germany “LIFTIMA”
- Explosion-proof devices
1986
- New building and move into today’s premises in Bergisch Gladbach, Kurt-Schumacher-Str. 1
- Participation as exhibitor at fair in Nice
- Short-stroke pushbutton KU
1983
- Safety switch with locking mechanism WZV
1982
- 50th company anniversary
1981
- Optoelectronic sensor pushbutton OT 1
1980-1971
1979
- Switch for locking mechanism HZ
1978
- Pushbutton programme with row switching elements
1977
- Door switch water-protected WZ
1973
- Door switch (foreced contact) PZ73, DZ73
1971
- Death of both company founders within just one week: Hans Kronenberg died at the end of February 1971 at the age of 67. Only six days later, his brother Josef died at the age of 69 of a heart attack.
- Transformation of the company into a private limited company
1970-1961
1970
- Set-up of international representations: first representation in Belgium
1969
- Acquisition of new premises and building of a warehouse in the industrial estate of Bensberg, Kurt-Schumacher-Straße 1
1967
- Door frame mounting box
1966
- Roller type contact RZ
1960-1951
1958
- Expansion into other European countries. At first the still existing cooperations with the companies Siminor (today OCTÉ) for France and Bot (today Wittur) for the Netherlands were concluded. 1970 further expansion of international agencies: First agency in Belgium
- First door interlock with faulty closure device
1957
- Move to Bensberg near Cologne, Industrieweg 18 and thus end of the single-part production and start of the serial production
- Pushbutton panels with signal lamps
1953
- Entry as ordinary partnership (OHG)
1950-1932
1949
- First direction limit switch US
1938
- First patent for door switch (forced contact) PZ 1-3
1932
- First limit switch HJK 1
- 15th November Founding of the company by the brothers Hans & Josef Kronenberg, head office in Cologne-Nippes, business registration for the manufacture and sale of electrical switching devices. Until the end of the Second World War, the brothers ran the business in addition to their main activity as lift technicians in a backyard in Cologne. With the limit switch HJK-1 they lay the foundation for a successful company history.