1.Karastoyanov D., Simeonov S., Braille display, Patent of the Republic of Bulgaria, reg. № 66527 / 23.11.2017

Abstract: The Braille display is a matrix consisting of a base (1) and needles (2) attached to it with coils (3) at their lower end, representing electromagnets (4), where axes (5) are placed above the rows of the matrix, located above the needles (2), above each needle (2) of the axis (5) is strung a magnetic hemisphere (6) with the diameter of the needle (2) and with an attractive pole (7) in the rounded part of the hemisphere (5). The Braille display (tactile Braille matrix) is used to create an auxiliary text/graphic computer interface for people with visual impairments

2.Karastoyanov D., Micromanipulator, Patent of the Republic of Bulgaria, reg. № 66547 / 31.10.2016

Abstract: The micromanipulator is designed to perform test and measurement microoperations in experiments and quality control in the field of new materials and micro- and nano technologies. The device consists of a base (1) and two movable units (2) and (3), which are connected to each other by elastic connections (4), (5), (7). The driving mechanisms are piezoceramic elements - actuators (6) and (8). Towards the end (9) of the first executive unit (2) on the side of the elastic connection (4), with a rigid connection (10), a third movable unit (11) is mounted perpendicular to the plane of the units (2) and (3). In the arm of the unit (11) is mounted a drive mechanism, which is a piezoceramic element - actuator (12). At the end of the unit (11), after the actuator (12), a nozzle (13) is mounted. The device will be used in research and measurement laboratories to perform test and qualitative micromanipulations.

3. Karastoyanov D., Braille screen, Patent of the Republic of Bulgaria, reg. № 66562 / 31.01.2017

Abstract: The Braille screen (tactile Braille matrix) is used to create an auxiliary text / graphic computer interface for people with visual impairments. The braille screen is a grid (12) with holes and placed under it on a base (11) a matrix of electromagnets consisting of an external magnetic conductor (3), coils (4 and 8) with magnetic conductors (2 and 9) and non-magnetic needles (1 and 10), carried by an axially magnetized permanent magnet (6) with ferromagnetic disks (5 and 7) movable in the area between the control coils on both sides from above and below, and a grid with holes (12) through which the needles pass is placed above the electromagnets. The electromagnets can be arranged in the matrix both in one row and in two or three rows next to each other with offset on the two axes (x and y) and different lengths of the movable needles (1) on the third axis (z), so that overlap and take up less space in the matrix, as the tips of the needles (1) are in one plane - the plane of the grid with holes (12) on the Braille screen.

4. Karastoyanov D., Braille display, Patent of the Republic of Bulgaria, reg. № 66702 / 16.07.2018

Abstract: The invention is a grid (12) with holes and placed under it on a base (11) a matrix of electromagnets consisting of an external magnetic conductor (3), coils (4 and 9) with magnetic conductors (2 and 10) and a non-magnetic needle (1), carried by a non-magnetic body (6) movable in the area between the coils (4 and 9) with an axially magnetized permanent magnet (7) with ferromagnetic disks (5 and 8) on both sides (top and bottom), and a grid with holes (12) (Braille display) through which the needles pass. The electromagnets can be arranged in the matrix both in one row and in two, three or more rows next to each other with offset on two axes (x and y) and different lengths of the movable needles (1) on the third axis (z), thus they do not overlap and take up less space in the matrix, as the tips of the needles (1) are in one plane - the plane of the grid (12) with holes in the Braille display. The Braille display (tactile Braille matrix) is used to create an auxiliary text / graphic computer interface for people with visual impairments.

5. Karastoyanov D., Hinov Kr., Yachev Iv, Balabozov J., Braille Display, Patent of the Republic of Bulgaria, reg. № 66734 / 31.07.2018

Abstract: The Braille display is a grid (14) with holes and placed under it on a base (1) a matrix of electromagnets consisting of an external magnetic conductor (2), coils (3 and 5) with magnetic conductors (4 and 6), and movable in the area between the coils are a non-magnetic body (7) which carries a non-magnetic needle (9) and an axially magnetized permanent magnet (8) with ferromagnetic disks (10 and 11) on both sides (top and bottom), respectively with cylindrical poles (12) for the magnetic circuit (4) and a ferromagnetic disk (10), and with conical poles (13) for the magnetic circuit (6) and the ferromagnetic disk (11), as above the electromagnets is placed a grid with holes (14) (Braille display) through which the needles pass (9). The Braille display finds application for the creation of an auxiliary text / graphic computer interface for people with visual impairments.

6. Karastoyanov D., Nail, Patent of the Republic of Bulgaria, reg. № 66855 / 27.02.2019

Abstract: The nail consists of a body (3) in the shape of an equilateral triangle with convex sides representing arcs (9). At the upper end of the body (3) is formed a head (5) of three convex parts of a sphere, and on its upper side the head (5) is flat, and in its center is formed a recess (7) having the shape of a triangle with convex countries. At its lower end, the body (3) ends with a vertex (1), representing a triangular convex spheroidal pyramid, the sides of which are parts of a sphere. The nail will find application in construction, in the furniture industry and in everyday life.

7. Abadjiev V., Abadjieva Em., Karastoyanov D., Gravitational enrichment device, Patent of the Republic of Bulgaria, reg. № 66899 / 30.05.2019

Abstract: The device is intended for immediate separation of heavy components included in the enriched raw material, in particular for enrichment of raw materials from placer deposits. The device is adjusted quickly and easily to an optimal enrichment process for raw materials with different characteristics, increasing the amount of fine grades in the processed raw material. The device includes a feed chute (1) and a multi-chamber gateway with cascading chambers (2), a sieve (3) mounted above the bottom of each chamber (2) and transverse thresholds (10) at the boundary of two adjacent chambers (2). The sieve (3) installed in each chamber (2) concludes a changing angle (alpha) with the bottom (7) of the chamber (2), and the transverse threshold (10) is movably mounted and rotating at an angle (gamma) on an axis (9). ) between two adjacent chambers (2), in a manner ensuring the separation and connection of the adjacent chambers (2), and the multi-chamber gateway and the feed chute (1) are mounted to a fixed stand (11) at a changing angle (beta) to the horizon.

8. Karastoyanov D., Yachev Iv., Hinov Kr., Polarized electromagnet, Patent of the Republic of Bulgaria, reg. № 67104 / 15.06.2020

Abstract: The invention relates to a polarized electromagnet, with applications for vibration drive, or drive with one and two stable positions of mechanical, hydraulic, pneumatic, electrical switching devices and apparatus for building automated systems. The polarized electromagnet is a construction containing a magnetic conductor (1), fixed permanent magnets (3 and 4), a movable permanent magnet - anchor (2) and controllable electromagnetic screens (5 and 6). The position of the movable permanent magnet - anchor (2) relative to the fixed permanent magnets (3 and 4) is controlled by the electromagnetic screens (5 and 6). An advantage of the electromagnet is the ability, depending on the selected control mode, the armature (2) to occupy one or two stable positions, or to perform vibrational movement.

9. Karastoyanov D., Stoimenov N., LIFTER, Patent of the Republic of Bulgaria, reg. № 67020 / 28.01.2020

Abstract: The lifter consists of a body (1), a head (2) and a base (3). The head (2) is a triangle with spheroidal walls (4) and a pointed tip (5). The lifter is used for crushing, fragmentation and grinding the material to the required size and will find application in the mills in the mining industry.

10. Karastoyanov D., Stoimenov N., Gyoshev S., Thermometer, Patent of the Republic of Bulgaria, reg. № 67158 / 24.09.2020

Abstract: The thermometer consists of a hub (1) and a spirally wound bimetallic plate (2). The inner end (3) of the helical bimetallic plate (2) is mounted to the hub (1). Above the outer end (4) of the spiral bimetallic plate (2) there are tubular beds (6) with springs (7). The beds (6) contain movable elements, representing buttons (8) of different lengths. The outer end (4) of the helical bimetallic plate (2) moves in a circle with radial expansion under the influence of temperature, raising the buttons (8) in succession depending on the temperature. The thermometer is designed to serve visually impaired and blind people and will find application in industrial and household appliances such as boilers, irons, hot plates, kettles and more.

11. Karastoyanov D., Stoimenov N., Gyoshev S., Tactile Graphic Tile for the Blind, Patent of the Republic of Bulgaria, reg. № 67212 / 17.12.2020

Abstract: The tactile graphic plate for the blind consists of figures (1) located on two levels on a plate, contours (2) around figures (1), Braille symbols (3) in figures (1) and Braille annotation (4) with hemispherical outwardly convex buds (5). The tactile graphic plate for the blind will find application for presenting samples of the cultural and historical heritage for visually impaired or blind users, who by touch can "see" and imagine the respective picture, icon, photo, tapestry, etc. static planar objects.

12. Penchev T., Gyoshev S., Mobile phone stand, Utility Model of the Republic of Bulgaria, reg. № 2965 U1 / 16.07.2018

Abstract: The utility model - a stand for a mobile phone, consisting of a rectangular panel [1], on the back of which is mounted a hinge [2], an L-shaped arm [3] and mounted on it nozzles [4], in the lower horizontal part of the rectangular panel [1] are mounted fasteners [5], rounded fastener [6]. The utility model - mobile phone stand is attached to the monitor and is designed to make it easier for a person to work with a computer and use a mobile phone when needed.

13. Karastoyanov D., Stoimenov N., Abrasive body, Utility Model of the Republic of Bulgaria, reg. № 2964 U1 / 16.07.2018

Abstract: The utility model - abrasive body, is a body with a cross-sectional shape composed of three triangles with arcuate convex sides (1), vertices (2) and base (3). The three triangles with arcuate convex sides (1) can be equilateral or equilateral. The arcs of the sides (1) of the three triangles can be different geometric curves of the same or different length. The utility model abrasive body will find application in the industry for processing details in finishing treatments such as degreasing, grinding, polishing, etc.

14. Stoimenov N., Paneva M., Panev P., Holder for test specimens, Utility Model of the Republic of Bulgaria, reg. № 3892 U1 / 23.09.2020

Abstract: The holder for test specimens consists of a body (1). The body (1) of the holder for test specimens is placed on the movable plate (10), after which the test body is placed in a hole (5). The test body is tightened by hole (6) and the screw (7). The utility model holder for test specimens will find application in the field of research and analysis for gripping in scanning, examination and analysis of test specimens.