WO2022016242A1 - Force-transmitting device for assisting bearings - Google Patents
Force-transmitting device for assisting bearings Download PDFInfo
- Publication number
- WO2022016242A1 WO2022016242A1 PCT/BR2020/050280 BR2020050280W WO2022016242A1 WO 2022016242 A1 WO2022016242 A1 WO 2022016242A1 BR 2020050280 W BR2020050280 W BR 2020050280W WO 2022016242 A1 WO2022016242 A1 WO 2022016242A1
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- WIPO (PCT)
- Prior art keywords
- bearings
- linear
- segment
- segments
- cone
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/10—Alleged perpetua mobilia
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C31/00—Bearings for parts which both rotate and move linearly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
Definitions
- the present invention belongs, in a general way, to the technological sector of mechanical systems in general and of bearings in particular, referring to a circular or linear device based on the principles of the so-called “cone paradox”, which allows driving the forces involved and direct the movement of an element, helping with advantages the bearings currently on the market.
- the state of the art of this technological sector comprises conventional bearings, which are devices that allow controlled relative movement between two or more parts. These bearings are designed to withstand axial and radial forces and to minimize friction, however, they are not capable of directing the movement and using the variation of the center of mass of elements to assist this movement, as occurs in the present invention.
- the prior art relevant to the present invention further comprises the cone paradox.
- This experiment appeared in the 17th century and comprises the advancement of a double cone on an inclined V-shaped ramp, in a new interpretation of the law of gravity. When placed at the lowest part of the ramp, the double cone goes up the ramp instead of down, as would be expected. In reality, when the cone goes up the ramp, its center of gravity moves down and what goes up are the lateral contact points of the surface with the ramp.
- Mathematical models demonstrate that the slope and opening angles of the ramps play a fundamental role in the phenomenon.
- the present invention aims to characterize a device capable of helping the bearings of mechanical systems to conduct the applied force, reducing friction and the effort generated in its operation, thus reducing equipment wear and increasing the its lifespan.
- the present invention is based on the principles of the “cone paradox” and for the first time makes something, which until now was just a scientific curiosity, have a practical application.
- the invention refers to a device formed by curved or linear segments, which make it possible to form a straight or circular path, always being the center of gravity of the driven element (a sphere, an axis, etc.) each segment has.
- the constructive form of the segment will maintain, at the end of each one, the ideal condition (height and opening) so that the sphere (or other element) can continue its displacement movement. continuously.
- the displacement side or direction of rotation has been defined, it only works in the given direction. This gives the movable element a constant shifted center of gravity condition that allows the element to move at the least applied effort, resulting in a continuous downward displacement.
- Figure 1 top view drawing of a first embodiment of the device with simple curved segments, forming a circle.
- Figure 2 is a top view drawing of a segment that forms a quadrant of the first embodiment of the ring.
- FIG. 1 Figure 3 perspective drawing of the first embodiment of the complete device.
- FIG. 4 perspective drawing of the first embodiment of the device, in which the use with an inclined axis can be visualized.
- Figure 5 perspective drawing of a second embodiment of the device, in which the curved segments are double, illustrative of its use with a sphere.
- Figure 6 is a top view drawing of the third embodiment of the invention, in which the device is formed by straight segments and in which the direction of movement of the ball is indicated. The drawing was represented turned 90 degrees for the sake of scaling the figure.
- FIG. 7 perspective drawing of the third embodiment, also represented displaced 90 degrees and with the upper part of the device facing the left edge of the sheet, in which the direction of movement of the sphere is indicated.
- FIG. 8 perspective drawing of a third embodiment of the invention, also shifted 90 degrees, realized from another point of view.
- the present invention refers to a device (1), which can be circular or linear, which uses the principles of the cone paradox to drive the movement.
- Each segment (2) has a curved shape and is provided with a vertical slope and a contact edge (3) with a variable distance (4) from the geometric center of the segment (C), in order to form the angle horizontal direction necessary to conduct the force obtained.
- the curvature, variable distance (4) and slope are calculated with the well-known mathematical formulas that relate these variables to the cone paradox.
- FIG. 5 we see a second embodiment of the invention, in which the device is double, formed with an inner ring (1a) of smaller diameter and an outer ring (1b) of larger diameter and concentric to the first. Both rings (1a and 1b) are constructed following the principles of the cone paradox. In this figure we also see the use of this embodiment with a sphere (5).
- FIGS 6 to 8 we see another embodiment of the invention, in which the device (1) is formed by linear segments (2), provided with contact edges (3) inclined at a horizontal angle towards the imaginary longitudinal axis of the part (E) and inclined with the vertical angle, where the horizontal and vertical angles are calculated to take advantage of the principles of the cone paradox and direct the forces of an element (5).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The present invention pertains to the technological field of mechanical systems in general and bearings in particular, and relates to a device (1) which can be circular or linear and uses the principles of the double cone paradox to transmit movement, being formed in its circular embodiment by four single or double curved segments (2) which are provided with a vertical inclination and a contact edge (3) having a variable distance (4) from the geometric centre of the segment (C), while in its linear embodiment the device is formed by linear segments (2) which are provided with contact edges (3) inclined by a horizontal angle towards the imaginary longitudinal axis of the part (E) and inclined with the vertical angle.
Description
DISPOSITIVO CONDUTOR DE FORÇAS PARA AUXÍLIO DE ROLAMENTOS. POWER CONDUCTOR DEVICE FOR BEARING ASSISTANCE.
Setor tecnológico da invenção Technological sector of invention
[0001] A presente invenção pertence, de maneira geral, ao setor tecnológico de sistemas mecânicos em geral e de rolamentos em particular, referindo-se a um dispositivo circular ou linear baseado nos princípios do chamado “paradoxo do cone”, que permite conduzir as forças envolvidas e direcionar o movimento de um elemento, auxiliando com vantagens os rolamentos atualmente existentes no mercado. [0001] The present invention belongs, in a general way, to the technological sector of mechanical systems in general and of bearings in particular, referring to a circular or linear device based on the principles of the so-called “cone paradox”, which allows driving the forces involved and direct the movement of an element, helping with advantages the bearings currently on the market.
Estado da técnica conhecido Known state of the art
[0002] O estado da técnica deste setor tecnológico compreende rolamentos convencionais, que são dispositivos que permitem o movimento relativo controlado entre duas ou mais partes. Estes rolamentos são projetados para suportar esforços axiais e radiais e para minimizar o atrito, no entanto, não são capazes de direcionar o movimento e utilizar a variação do centro de massa de elementos para auxiliar este movimento, como ocorre na presente invenção. [0002] The state of the art of this technological sector comprises conventional bearings, which are devices that allow controlled relative movement between two or more parts. These bearings are designed to withstand axial and radial forces and to minimize friction, however, they are not capable of directing the movement and using the variation of the center of mass of elements to assist this movement, as occurs in the present invention.
[0003] O estado da técnica relevante para a presente invenção compreende ainda o paradoxo do cone. Este experimento surgiu no século XVII e compreende o avanço de um duplo cone em uma rampa inclinada em formato de V, em uma nova interpretação da lei da gravidade. Quando colocado na parte mais baixa da rampa, o duplo cone sobe a mesma ao invés de descer, como seria esperado. Na realidade, quando o cone sobe a rampa o seu centro de gravidade se move para baixo e o que sobem são os pontos de contato laterais da superfície com a rampa.
[0004] Modelos matemáticos demonstram que os ângulos de inclinação e de abertura das rampas desempenham papel fundamental no fenômeno. Diversos autores matematizaram a situação, relacionando em fórmulas o ângulo de inclinação das rampas, o ângulo de separação dos segmentos que forma o V e a altura do centro de massa do cone, bem como as condições necessárias para o fenômeno ocorrer. Este experimento nunca encontrou aplicação prática, restringindo-se a uma curiosidade científica ou a uma experiência utilizada no ensino de física. [0003] The prior art relevant to the present invention further comprises the cone paradox. This experiment appeared in the 17th century and comprises the advancement of a double cone on an inclined V-shaped ramp, in a new interpretation of the law of gravity. When placed at the lowest part of the ramp, the double cone goes up the ramp instead of down, as would be expected. In reality, when the cone goes up the ramp, its center of gravity moves down and what goes up are the lateral contact points of the surface with the ramp. [0004] Mathematical models demonstrate that the slope and opening angles of the ramps play a fundamental role in the phenomenon. Several authors have mathematized the situation, relating in formulas the angle of inclination of the ramps, the angle of separation of the segments that form the V and the height of the center of mass of the cone, as well as the necessary conditions for the phenomenon to occur. This experiment never found practical application, being restricted to a scientific curiosity or an experiment used in physics teaching.
[0005] Convém salientar que o paradoxo do cone só apresenta apenas um segmento reto, ou seja, não tem uma continuidade que permita uma aplicação pratica. [0005] It should be noted that the paradox of the cone only presents a straight segment, that is, it does not have a continuity that allows a practical application.
Novidade e objetivos da invenção [0006] A presente invenção objetiva caracterizar um dispositivo capaz de auxiliar os rolamentos de sistemas mecânicos a conduzir a força aplicada, reduzindo o atrito e o esforço gerado no funcionamento do mesmo, assim diminuindo o desgaste de equipamentos e aumentando a sua vida útil. O presente invento é baseado nos princípios do “paradoxo do cone” e pela primeira vez faz com que algo, que ate o momento era apenas uma curiosidade científica, tenha uma aplicação prática. Novelty and objectives of the invention [0006] The present invention aims to characterize a device capable of helping the bearings of mechanical systems to conduct the applied force, reducing friction and the effort generated in its operation, thus reducing equipment wear and increasing the its lifespan. The present invention is based on the principles of the “cone paradox” and for the first time makes something, which until now was just a scientific curiosity, have a practical application.
[0007] A invenção se refere a um dispositivo formado por segmentos curvos ou lineares, que permitem formar um percurso reto ou circular, sendo sempre o centro de gravidade do elemento conduzido (uma esfera, um eixo, etc.) deslocado, pela abertura que cada segmento possui. A forma construtiva do segmento vai manter ao final de cada um a condição (altura e abertura) ideal para que a esfera (ou outro elemento) possa continuar seu movimento de deslocamento
de modo contínuo. Uma vez definido o lado de deslocamento ou sentido de giro, este só funciona no sentido determinado. Isto dá ao elemento móvel uma condição constante de centro de gravidade deslocado que propicia o movimento desse elemento ao menor esforço aplicado, resultando em um deslocamento descendente contínuo. [0007] The invention refers to a device formed by curved or linear segments, which make it possible to form a straight or circular path, always being the center of gravity of the driven element (a sphere, an axis, etc.) each segment has. The constructive form of the segment will maintain, at the end of each one, the ideal condition (height and opening) so that the sphere (or other element) can continue its displacement movement. continuously. Once the displacement side or direction of rotation has been defined, it only works in the given direction. This gives the movable element a constant shifted center of gravity condition that allows the element to move at the least applied effort, resulting in a continuous downward displacement.
Descrição dos desenhos anexos Description of the attached drawings
[0009] A fim de que a presente invenção seja plenamente compreendida e levada à prática por qualquer pessoa versada na técnica, a mesma será explicada em detalhe na sequência, tendo como base os desenhos anexos abaixo listados, que são meramente ilustrativos de concretizações preferenciais possíveis e são apresentados sem ter qualquer intenção de limitar o escopo da invenção proposta, sendo evidente para qualquer técnico no assunto que inúmeras modificações, substituições por elementos equivalentes, adições e supressões podem ser realizadas sem fugir do conceito inventivo proposto: [0009] In order for the present invention to be fully understood and put into practice by any person skilled in the art, it will be explained in detail below, based on the attached drawings listed below, which are merely illustrative of possible preferred embodiments. and are presented without any intention of limiting the scope of the proposed invention, it being evident to any person skilled in the art that numerous modifications, substitutions for equivalent elements, additions and deletions can be carried out without departing from the inventive concept proposed:
[0010] Figura 1 desenho em vista superior de uma primeira concretização do dispositivo com segmentos curvos simples, formando um círculo. [0010] Figure 1 top view drawing of a first embodiment of the device with simple curved segments, forming a circle.
[0011] Figura 2 desenho em vista superior de um segmento que forma um quadrante da primeira concretização do anel. [0011] Figure 2 is a top view drawing of a segment that forms a quadrant of the first embodiment of the ring.
[0012] Figura 3 desenho em perspectiva da primeira concretização do dispositivo completo. [0012] Figure 3 perspective drawing of the first embodiment of the complete device.
[0013] Figura 4 desenho em perspectiva da primeira concretização do dispositivo, em que se pode visualizar o uso com um eixo inclinado.
[0014] Figura 5 desenho em perspectiva de uma segunda concretização do dispositivo, em que os segmentos curvos são duplos, ilustrativo de seu uso com uma esfera. [0013] Figure 4 perspective drawing of the first embodiment of the device, in which the use with an inclined axis can be visualized. [0014] Figure 5 perspective drawing of a second embodiment of the device, in which the curved segments are double, illustrative of its use with a sphere.
[0015] Figura 6 desenho em vista superior da terceira concretização da invenção, em que o dispositivo é formado por segmentos retilíneos e no qual se indica o sentido de movimento da esfera. O desenho foi representado virado 90 graus por questão de dimensionamento da figura. [0015] Figure 6 is a top view drawing of the third embodiment of the invention, in which the device is formed by straight segments and in which the direction of movement of the ball is indicated. The drawing was represented turned 90 degrees for the sake of scaling the figure.
[0016] Figura 7 desenho em perspectiva da terceira concretização, também representado deslocado 90 graus e com a parte superior do dispositivo voltada para a margem esquerda da folha, no qual se indica o sentido de movimento da esfera. [0016] Figure 7 perspective drawing of the third embodiment, also represented displaced 90 degrees and with the upper part of the device facing the left edge of the sheet, in which the direction of movement of the sphere is indicated.
[0017] Figura 8 desenho em perspectiva de uma terceira concretização da invenção, também deslocado 90 graus, realizado a partir de outro ponto de vista. [0017] Figure 8 perspective drawing of a third embodiment of the invention, also shifted 90 degrees, realized from another point of view.
Descrição detalhada da invenção Detailed description of the invention
[0018] Conforme pode ser visualizada nas figuras anexas, a presente invenção se refere a um dispositivo (1), que pode ser circular ou linear, que utiliza os princípios do paradoxo do cone para conduzir o movimento. [0018] As can be seen in the attached figures, the present invention refers to a device (1), which can be circular or linear, which uses the principles of the cone paradox to drive the movement.
[0019] Nas figuras 1 a 4 vemos uma primeira concretização da invenção com uma configuração circular, em que quatro segmentos curvos (2) formam um anel simples. [0019] In figures 1 to 4 we see a first embodiment of the invention with a circular configuration, in which four curved segments (2) form a simple ring.
[0020] Cada segmento (2) apresenta uma forma curva e é dotado de uma inclinação vertical e de uma borda de contato (3) com uma distância variável (4) do centro geométrico do segmento (C), de modo a formar o ângulo horizontal necessário para conduzir a força obtida. A curvatura, a distância variável (4) e a inclinação são
calculadas com as conhecidas fórmulas matemáticas que relacionam estas variáveis com o paradoxo do cone. [0020] Each segment (2) has a curved shape and is provided with a vertical slope and a contact edge (3) with a variable distance (4) from the geometric center of the segment (C), in order to form the angle horizontal direction necessary to conduct the force obtained. The curvature, variable distance (4) and slope are calculated with the well-known mathematical formulas that relate these variables to the cone paradox.
[0021] Na figura 4 vemos o uso deste dispositivo com um eixo em inclinação variável (5). [0021] In figure 4 we see the use of this device with an axis in variable inclination (5).
[0022] Na figura 5 vemos uma segunda concretização da invenção, em que o dispositivo é duplo, formado com um anel interno (1a) de menor diâmetro e um anel externo (1b) de maior diâmetro e concêntrico ao primeiro. Ambos os anéis (1a e 1b) são construídos seguindo os princípios do paradoxo do cone. Nesta figura vemos também o uso desta concretização com uma esfera (5). [0022] In figure 5 we see a second embodiment of the invention, in which the device is double, formed with an inner ring (1a) of smaller diameter and an outer ring (1b) of larger diameter and concentric to the first. Both rings (1a and 1b) are constructed following the principles of the cone paradox. In this figure we also see the use of this embodiment with a sphere (5).
[0023] Nas figuras 6 a 8 vemos outra concretização da invenção, em que o dispositivo (1) é formado por segmentos lineares (2), dotados de bordas de contato (3) inclinadas de ângulo horizontal em direção ao eixo longitudinal imaginário da peça (E) e inclinadas com o ângulo vertical, em que os ângulos horizontal e vertical são calculados para se aproveitar os princípios do paradoxo do cone e dirigir as forças de um elemento (5). [0023] In figures 6 to 8 we see another embodiment of the invention, in which the device (1) is formed by linear segments (2), provided with contact edges (3) inclined at a horizontal angle towards the imaginary longitudinal axis of the part (E) and inclined with the vertical angle, where the horizontal and vertical angles are calculated to take advantage of the principles of the cone paradox and direct the forces of an element (5).
[0024] Tratou-se no presente relatório descritivo de uma invenção dotada de aplicação, novidade e atividade inventiva sendo, portanto, revestida de todos os requisitos para a concessão de uma patente.
[0024] This descriptive report is an invention endowed with application, novelty and inventive step and, therefore, covered all the requirements for the granting of a patent.
Claims
Reivindicações: Claims:
1- DISPOSITIVO CONDUTOR DE FORÇAS PARA1- POWER CONDUCTOR DEVICE FOR
AUXÍLIO DE ROLAMENTOS caracterizado por ser formado por quatro segmentos curvos (2) que formam um anel, cada segmento (2) dotado de uma inclinação vertical e de uma borda de contato (3) com uma distância variável (4) do centro geométrico do segmento (C), de modo a formar o ângulo horizontal necessário para conduzir a força obtida. BEARING AID characterized by being formed by four curved segments (2) that form a ring, each segment (2) provided with a vertical slope and a contact edge (3) with a variable distance (4) from the geometric center of the segment (C), so as to form the horizontal angle necessary to conduct the force obtained.
2- DISPOSITIVO CONDUTOR DE FORÇAS PARA2- POWER CONDUCTOR DEVICE FOR
AUXÍLIO DE ROLAMENTOS de acordo com a reivindicação 1 caracterizado por ser constituído por um anel interno (1a) de menor diâmetro e um anel externo (1b) de maior diâmetro e concêntrico ao primeiro. BEARING AID according to claim 1, characterized in that it consists of an inner ring (1a) of smaller diameter and an outer ring (1b) of larger diameter and concentric to the first.
3- DISPOSITIVO CONDUTOR DE FORÇAS PARA3- POWER CONDUCTOR DEVICE FOR
AUXÍLIO DE ROLAMENTOS caracterizado por ser formado por segmentos lineares (2), dotados de bordas de contato (3) inclinadas de ângulo horizontal em direção ao eixo longitudinal imaginário da peça (E) e inclinadas com ângulo vertical.
BEARING AID characterized by being formed by linear segments (2), equipped with contact edges (3) inclined with a horizontal angle towards the imaginary longitudinal axis of the part (E) and inclined with a vertical angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2020/050280 WO2022016242A1 (en) | 2020-07-22 | 2020-07-22 | Force-transmitting device for assisting bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2020/050280 WO2022016242A1 (en) | 2020-07-22 | 2020-07-22 | Force-transmitting device for assisting bearings |
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| Publication Number | Publication Date |
|---|---|
| WO2022016242A1 true WO2022016242A1 (en) | 2022-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2020/050280 WO2022016242A1 (en) | 2020-07-22 | 2020-07-22 | Force-transmitting device for assisting bearings |
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| WO (1) | WO2022016242A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2051693U (en) * | 1988-12-23 | 1990-01-24 | 长春第一机床厂 | Double cone dynamic bearing |
| RU2085475C1 (en) * | 1995-04-13 | 1997-07-27 | Тюменский государственный нефтегазовый университет | Device for horizontal transportation of loads |
| US7264564B2 (en) * | 2002-06-17 | 2007-09-04 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Cone disc infinitely-variable gearbox |
| US8616777B1 (en) * | 2012-11-16 | 2013-12-31 | Pratt & Whitney Canada Corp. | Bearing assembly with inner ring |
| CN205978125U (en) * | 2016-08-15 | 2017-02-22 | 浙江新昌皮尔机械配件有限公司 | General profile shaft holds |
| CN107842565A (en) * | 2017-11-22 | 2018-03-27 | 台州富特传动机械有限公司 | A kind of bipyramid ring |
-
2020
- 2020-07-22 WO PCT/BR2020/050280 patent/WO2022016242A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2051693U (en) * | 1988-12-23 | 1990-01-24 | 长春第一机床厂 | Double cone dynamic bearing |
| RU2085475C1 (en) * | 1995-04-13 | 1997-07-27 | Тюменский государственный нефтегазовый университет | Device for horizontal transportation of loads |
| US7264564B2 (en) * | 2002-06-17 | 2007-09-04 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Cone disc infinitely-variable gearbox |
| US8616777B1 (en) * | 2012-11-16 | 2013-12-31 | Pratt & Whitney Canada Corp. | Bearing assembly with inner ring |
| CN205978125U (en) * | 2016-08-15 | 2017-02-22 | 浙江新昌皮尔机械配件有限公司 | General profile shaft holds |
| CN107842565A (en) * | 2017-11-22 | 2018-03-27 | 台州富特传动机械有限公司 | A kind of bipyramid ring |
Non-Patent Citations (2)
| Title |
|---|
| HISCOX, GARDNER DEXTER: "Passage; Mechanical Appliances, Mechanical Movements and Novelties of Construction", MECHANICAL APPLIANCES, MECHANICAL MOVEMENTS AND NOVELTIES OF CONSTRUCTION, 3RD EDITIONS, 30 January 1914 (1914-01-30), US, pages 366 - 372, XP009534165 * |
| MEDEIROS ALEXANDRE, FARIAS DE MEDEIROS CLEIDE: "Desvendando o Mistério do Duplo Cone Uncovering the Mystery of the Double Cone", REVISTA BRASILEIRA DE ENSINO DE FÍSICA, SOCIEDADE BRASILEIRA DE FÍSICA, vol. 25, no. 3, 1 September 2003 (2003-09-01), pages 333 - 339, XP055900583, ISSN: 1806-1117, DOI: 10.1590/S0102-47442003000300011 * |
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