Patent ES2107942B1, titled Monitor Installation System for Video Door Entry Systems, describes an architecture with monitors connected in parallel and arranged in a cascade, individual power supplies, and local control. This article examines that historical proposal by Javier Gorrochategui, filed in 1994, without turning it into a current installation guide.
ES2107942B1: purpose and authorship
According to the Google Patents record provided for this article, Javier Gorrochategui Grajirena is listed as the inventor, and ownership is attributed to an individual, not to Tegui as a company. The document concerns the electrical organization of the monitors and their connection to the intercom line and outdoor entrance panel.
This analysis focuses on that specific architecture. To study communication over two wires, see Gorrochategui and the two-wire video door entry system: patents from 1988 and 1994. It examines other documents, not the same invention.
Timeline: 1994 application and 1998 B1 publication
- December 30, 1994: filing of application ES9402680A and the priority date given in the record.
- December 1, 1997: publication of ES2107942A1.
- July 1, 1998: grant and publication of ES2107942B1, according to the Google Patents timeline.
Thus, the 1994 date refers to the filing of the proposal, not the publication of the B1 document.
The technical elements described
The available abstract describes monitors coupled in parallel in a cascade arrangement. Each monitor is powered by its own power supply and functionally controlled by a microprocessor.
It also mentions a bridge installed in the circuit of one of the monitors to keep the intercom line permanently connected to a compensating load. Another bridge provides the voltage required by the line to the outdoor button panel.
The documentary interest lies in combining individual power and control with shared line functions. The full description, claims, and figures are needed to interpret the technical scope of each element precisely.
What this proposal adds to technical history
The document makes it possible to study one way of distributing functions between the terminals and the shared infrastructure. Rather than focusing on the monitor's appearance, it addresses how to electrically organize a set of indoor units.
This is its contribution to historical analysis: a specific proposal for coordinating monitors, not proof that all later installations used the same principle.
The design of the outdoor panel presents a different problem. We explore it in Tegui Serie Europa: the modular panel and Gorrochategui's patent, which focuses on blocks, buttons, label holders, and access to the interior. The two articles complement each other without attributing the same solution to different documents.
Later citation in Fermax's ES2167192B1
The “Cited by” section of the provided record links ES2107942B1 to ES2167192B1, Battery Module for Video Door Entry Monitor, whose listed owner is Fermax Electrónica. The table gives a priority date of December 21, 1999, and a B1 publication date of May 1, 2003.
The link is identified as an examiner citation. This is a later documentary reference, but it does not demonstrate use of the architecture, copying of the solution, or a commercial agreement. A technical comparison would require examining both documents in full.
Limits of historical interpretation
The patent alone does not establish mass production or marketing under a specific reference. Linking it to particular Tegui equipment requires catalogs, manuals, or commercial documentation to support that connection. Nor is it presented here as the first solution of its kind.
This analysis does not establish compatibility, a maximum number of monitors, or wiring instructions. The bridges described belong to the historical proposal and must not be applied to current equipment: any work must be based on the documentation for the installed system.
Sources and further documentation
The primary source is the ES2107942B1 record — Monitor Installation System for Video Door Entry Systems.
For independent context, see the Tegui Series 7 technical manual and the Tegui audio and video composition tables. Their inclusion does not establish that this equipment implements the patent.
Draft editorial note: timeline and bibliographic references added from the record provided. Before publication, verify the technical description, claims, and drawings against the complete original document.