US3905301A - Turntable rail switch for transport systems - Google Patents
Turntable rail switch for transport systems Download PDFInfo
- Publication number
- US3905301A US3905301A US449289A US44928974A US3905301A US 3905301 A US3905301 A US 3905301A US 449289 A US449289 A US 449289A US 44928974 A US44928974 A US 44928974A US 3905301 A US3905301 A US 3905301A
- Authority
- US
- United States
- Prior art keywords
- turntable
- curved
- connecting section
- straight
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/22—Tracks for railways with the vehicle suspended from rigid supporting rails
- E01B25/26—Switches; Crossings
Definitions
- the present invention relates to a turntable switch to connect the terminus of a track, or rail: with other terminal ends of the track or rail, located in alignment with the first terminal end, or at an angle with respect thereto, to form a turntable switch, and more particularly to such a turntable switch for transport systems such as single-track suspended transport. systems.
- Switches to connect tracks, or rails by means of a turntable, selectively, are frequently so made that a rotary, disk-like element has a straight track, or rail, and a curved track "or rail, the straight track connecting aligned track portions, and the curved rail connecting a rail portion with another one whichis angularly offset therefrom.
- a tumtable switch on which the ends of at least two track portions, joined together in a rotary assembly, are located on a circle concentric to the axis of theswitch.
- One of the track portions forms part of a circular arc; the other is a straight line and a tangent to the arc, with the tumtable axis as a center.
- the radius of the arc corresponds to the vertical distance between the tangent passing through the end points of the circular track portion, and the axis of rotation of the turntable or switch.
- a turntable-type switch has one straight connecting track and a pair of similarly curved circular segments, connected by a short straight track section, parallel to the straight connecting section extending across the turntable.
- FIG. 1 is a schematic illustration of a turntable switch having a straight and a curved connecting section, in which the ends of the connecting sections are radial with respect to the center of the turntable;
- FIG. 2 is a fragmentary view of the turntable, to a larger scale, illustrating an arrangement for four equally distributed track ends, for universal connection, and in which the ⁇ curved track segments are located in a circular segment having an angle, with respect to the center of the turntable, of 90.
- the diameter of the turntable as seen in FIG. 1 can be solely determined by the minimum distance a between the straight track section 1 and the curved track section 2, considering the minimum radius of curvature of the curved connecting section 2.
- the curved connecting section 2 includes a straight portion 3 of length b, which extends parallel to the straight connecting section 1.
- Two circular segmental portions 4, curving in the same direction, are joined to the straight portion 3.
- the radius of curvature of the curved segments 4, is r. g
- the turntable of the present invention is so constructed that the ends of the connecting sections 1, 2 terminate at the circumference of the turntable 5 in radial direction with respect to the center of the turntable.
- Theouter track portions, which are fixed, are directed to fit against the circumference of the turntable and extend radially with respect to the center axis 0 of the turntable 5.
- the curved section 2 is included in a sector 6, having a central angle a. The value of the angle a is determined by the curved connecting section 2, the length and curvature ofwwhich are again determined by the position of the fixed track connections with which the turntable is to cooperate.
- the most widely used turntable switch' is that shown in FIG. 2, in which four track connections 10, 11, 12, 13 terzminate, uniformly distributed, at the circumference of a circle, which is, simultaneously, the circumfe re nce of the turntable 5.
- the connection 1 is opposite connection 10.
- the turntable switch as sp'e cific'ally shown in FIGS 1 and 2, permits flexibl'eand universal intercon- .nection between any one of-the fixed tracks 10l3.
- turntable as described FI GI'1 has" a straight section 1, and a curved section 2.
- the curved connecting section 2 is located within the sector '6
- the sector 6 in FIG. 2 has a central angle of r/2, the ends of the two segments 4 of the curved track section 2 terminate in the radii defined bythe ends of the segment 6
- FIG. 1 A straight line g passes through the center of the turntable 5, aligned with the straight section 1.
- a line g can be drawn parallel thereto, spaced by a distance a from line g.
- a second parallel line g" is drawn parallel to line g, spaced therefrom by the distance r.
- the segment defined by the terminal or limit radii of segment a is extended to form line 11.
- a line 11' is drawn, spaced from line 11 by the distance r.
- the center M of the radius of curvature of the two circular segments 4 will be obtained.
- the intersection of a perpendicular line to line l1 passing through point M is a point at the circumference of the turntable 5, and this perpendicular line is tangent thereto.
- the distance r is the desired radius of curvature of the segments 4, for example the minimum radius of curvature for the particular track transport system under consideration.
- Circular segment 4 terminates in radial direction at the circumference of the turntable 5.
- FIG. 2 clearly illustrates the relationship which is determined, on the one hand, by the straight portion 3, of dimension b of the curved section 2, and the diameterD of the turntable 5, if the values a and r are given:
- Equation (5) shows that as a or/and r increases, D also increases. To permit use of a straight portion 3, the following relationship must necessarily obtain, derived from equation (4): l
- any turntable will satisfy the inequality (6 V
- the turntable neednot be a circular disk; it may, also, be a truss or other girder construction, in which the connecting sections 1, 2 are suitably arranged. If such a construction is used, the circumference of the turntable 5 should be considered as an imaginary circle, on which the track sections 1, 2 terminate, in radial direction.
- Rotary turntable switch for transport systems having first rail ends terminating in diametrical alignment, and other rail ends terminating at angles with respect thereto, comprising a straight connecting section (1) and a curved connecting section (2), wherein the curved connecting section (2) is characterized by two circular segments (4), each terminating at one end adjacent the edge of the circle of rotation of the turntable switch, curved in the same direction, and a straight connecting portion (3) parallel to the straight connecting section 1) connected between the other ends of thecircular segments and connecting the circular segments (4).
- the straight connecting portion (3 is defined by length and the relationship of V is satisfied, and wherein i a is the minimum distance between the straight connecting section (1) and the straight connecting portion (3);
- r is the radius of curvature of the circular segments
Abstract
To permit random interconnection of two aligned, as well as angularly offset rail connections by means of a turntable having a straight connecting section and a curved connecting section, the curved connecting section is formed of two circular segments, curved in the same direction, and connected by a straight connecting segment, parallel to the straight connecting section.
Description
United States Patent Meister Sept. 16, 1975 [54] TURNTABLE RAIL SWITCH FOR 768,239 8/1904 Richards 104/99 TRANSPORT 1,403,853 H1922 Ferris 104/99 2,211,220 8/1940 Verplanck 104/35 [75] Inv nt r: Erw st r, Delemont, 3,414,194 12/1968 Seitzinger et al..... 238/10 F Switzerland 3,426,703 2/1969 Morris 104/ 120 [73] Assignee: Von Roll AG, Gerlafingen,
Switzerland Primary Examiner-Lloyd L. King Assistant Examiner-Richard A. Bertsch [22] Flled 1974 Attorney, Agent, or FirmF1ynn'& Frishauf [21] Appl. No.: 449,289
301 Foreign Application Priority Data [57] ABSTRACT Mar. 22, 1973 Germany 2314400 To permit random interconnection of two aligned, as well as angularly offset rail connections by means of a [52] US. C1 z 104/99; 104/35; 246/378 turntable having a Straight connecting section and a [51] Int. Cl. E01B 3/00 Curved connecting section the Curved connecting [581 of Search 104/35, tion is formed of two circular segments, curved in the 99; 238/10 10 F; 246/430 378; same direction, and connected by a straight connect- 191/81 9 ing segment, parallel to the straight connecting section. [56] References Cited UNITED STATES PATENTS 3 Claims, 2 Drawing Figures 582,436 5/1897 Ridgway...: 104/99 w 7 a l2 4 Q 3 2 j I i g I r b r 1 1 L i g PATENTHJSEP! SFBYS SHEET 1 OF 2 PMEMEQ 3395391 SHEET 2 UF 2 Fig. 2
TURNTABLE'RAIL SWITCH-FOR TRANSPORT SYSTEMS The present invention relates to a turntable switch to connect the terminus of a track, or rail: with other terminal ends of the track or rail, located in alignment with the first terminal end, or at an angle with respect thereto, to form a turntable switch, and more particularly to such a turntable switch for transport systems such as single-track suspended transport. systems.
Switches to connect tracks, or rails by means of a turntable, selectively, are frequently so made that a rotary, disk-like element has a straight track, or rail, and a curved track "or rail, the straight track connecting aligned track portions, and the curved rail connecting a rail portion with another one whichis angularly offset therefrom. 1
It has previously been proposed to provide a tumtable switch on which the ends of at least two track portions, joined together in a rotary assembly, are located on a circle concentric to the axis of theswitch. One of the track portions forms part of a circular arc; the other is a straight line and a tangent to the arc, with the tumtable axis as a center. The radius of the arc corresponds to the vertical distance between the tangent passing through the end points of the circular track portion, and the axis of rotation of the turntable or switch. This had the disadvantage that the ends of the track portions on the turntable do not terminate at a circle concentric with the axis of the rotary switch in radial direction, so that it is not possible to connect all track portions, respectively, with each other. Another, known, turntable switch utilizes two circular track portions and a straight connecting line. The turntable is controlled by a chain drive, in order to match the desired connecting track portions to the fixed track ends. The ends of the connecting tracks match radially with the fixed portion, by terminating at a circle concentric with the axis of rotation of the turntable. The size of this arrangement,
SUBJECT MATTER OF THE PRESENT INVENTION Briefly, a turntable-type switch has one straight connecting track and a pair of similarly curved circular segments, connected by a short straight track section, parallel to the straight connecting section extending across the turntable.
The invention will be described by way of example. with reference to the accompanying drawings, wherein:
FIG. 1 is a schematic illustration of a turntable switch having a straight and a curved connecting section, in which the ends of the connecting sections are radial with respect to the center of the turntable; and
FIG. 2 is a fragmentary view of the turntable, to a larger scale, illustrating an arrangement for four equally distributed track ends, for universal connection, and in which the {curved track segments are located in a circular segment having an angle, with respect to the center of the turntable, of 90.
The basis for the present invention is the realization that the diameter of the turntable as seen in FIG. 1 can be solely determined by the minimum distance a between the straight track section 1 and the curved track section 2, considering the minimum radius of curvature of the curved connecting section 2. As seen in FIG. 1, the curved connecting section 2 includes a straight portion 3 of length b, which extends parallel to the straight connecting section 1. Two circular segmental portions 4, curving in the same direction, are joined to the straight portion 3. The radius of curvature of the curved segments 4, is r. g
The turntable of the present invention is so constructed that the ends of the connecting sections 1, 2 terminate at the circumference of the turntable 5 in radial direction with respect to the center of the turntable. Theouter track portions, which are fixed, are directed to fit against the circumference of the turntable and extend radially with respect to the center axis 0 of the turntable 5. The curved section 2 is included in a sector 6, having a central angle a. The value of the angle a is determined by the curved connecting section 2, the length and curvature ofwwhich are again determined by the position of the fixed track connections with which the turntable is to cooperate.
The most widely used turntable switch' is that shown in FIG. 2, in which four track connections 10, 11, 12, 13 terzminate, uniformly distributed, at the circumference of a circle, which is, simultaneously, the circumfe re nce of the turntable 5. The connection 1 1, as schematically indicated by the arrow, is opposite connection 10. The turntable switch as sp'e cific'ally shown in FIGS 1 and 2, permits flexibl'eand universal intercon- .nection between any one of-the fixed tracks 10l3. The
turntable as described FI GI'1 has" a straight section 1, and a curved section 2. Thecurved connecting section 2 is located within the sector '6 The sector 6 in FIG. 2 has a central angle of r/2, the ends of the two segments 4 of the curved track section 2 terminate in the radii defined bythe ends of the segment 6 The general construction required of a "turntable switch, with a turntable 5 and two connecting sections 1, 2, is seen in FIG. 1. A straight line g passes through the center of the turntable 5, aligned with the straight section 1. A line g can be drawn parallel thereto, spaced by a distance a from line g. A second parallel line g" is drawn parallel to line g, spaced therefrom by the distance r.
The segment defined by the terminal or limit radii of segment a is extended to form line 11. Parallel to line 11, a line 11' is drawn, spaced from line 11 by the distance r. At the intersection of lines 11 and g", the center M of the radius of curvature of the two circular segments 4 will be obtained. The intersection of a perpendicular line to line l1 passing through point M is a point at the circumference of the turntable 5, and this perpendicular line is tangent thereto. The distance r is the desired radius of curvature of the segments 4, for example the minimum radius of curvature for the particular track transport system under consideration.
Circular segment 4 terminates in radial direction at the circumference of the turntable 5. FIG. 2 clearly illustrates the relationship which is determined, on the one hand, by the straight portion 3, of dimension b of the curved section 2, and the diameterD of the turntable 5, if the values a and r are given:
D=2 \f2a+2r" {2-1 5) Equation (5) shows that as a or/and r increases, D also increases. To permit use of a straight portion 3, the following relationship must necessarily obtain, derived from equation (4): l
I claim:
1. Rotary turntable switch for transport systems having first rail ends terminating in diametrical alignment, and other rail ends terminating at angles with respect thereto, comprising a straight connecting section (1) and a curved connecting section (2), wherein the curved connecting section (2) is characterized by two circular segments (4), each terminating at one end adjacent the edge of the circle of rotation of the turntable switch, curved in the same direction, and a straight connecting portion (3) parallel to the straight connecting section 1) connected between the other ends of thecircular segments and connecting the circular segments (4).
2. Switch according to claim 1, wherein the straight connecting section (1) passes through the center (0) of the turntable; and wherein the curved segments (4) have equal arc length, and equal radius of curvature (r), and terminate in radial direction at the edge of the circle of rotation of the turntable switch.
3. Switch accordingto claim 2, for two right-angle track sections, wherein the minimum diameter of the turntable (5) is defined by length D:
the straight connecting portion (3 is defined by length and the relationship of V is satisfied, and wherein i a is the minimum distance between the straight connecting section (1) and the straight connecting portion (3);
r is the radius of curvature of the circular segments
Claims (3)
1. Rotary turntable switch for transport systems having first rail ends terminating in diametrical alignment, and other rail ends terminating at angles with respect thereto, comprising a straight connecting section (1) and a curved connecting section (2), wherein the curved connecting section (2) is characterized by two circular segments (4), each terminating at one end adjacent the edge of the circle of rotation of the turntable switch, curved in the same direction, and a straight connecting portion (3) parallel to the straight connecting section (1) connected between the other ends of the circular segments and connecting the circular segments (4).
2. Switch according to claim 1, wherein the straight connecting section (1) passes through the center (O) of the turntable; and wherein the curved segments (4) have equal arc length, and equal radius of curvature (r), and terminate in radial direction at the edge of the circle of rotation of the turntable switch.
3. Switch according to claim 2, for two right-angle track sections, wherein the minimum diameter of the turntable (5) is defined by length D: D 2 Square Root 2a + 2r ( Square Root 2 - 1)(a), the straight connecting portion (3) is defined by length b: b 2a - 2r ( Square Root 2 - 1)(b), and the relationship of
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2314400A DE2314400C2 (en) | 1973-03-22 | 1973-03-22 | Turning point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3905301A true US3905301A (en) | 1975-09-16 |
Family
ID=5875599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US449289A Expired - Lifetime US3905301A (en) | 1973-03-22 | 1974-03-08 | Turntable rail switch for transport systems |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3905301A (en) |
| JP (1) | JPS49127305A (en) |
| AT (1) | AT334972B (en) |
| BE (1) | BE812542A (en) |
| CA (1) | CA994171A (en) |
| CH (1) | CH566448A5 (en) |
| DE (1) | DE2314400C2 (en) |
| FR (1) | FR2222486B1 (en) |
| GB (1) | GB1437165A (en) |
| IT (1) | IT1007435B (en) |
| NL (1) | NL154288B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0649804A1 (en) * | 1993-10-22 | 1995-04-26 | Neu Trans System (S.A.) | A rotary platform switch device for a pneumatic container transfer installation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52152634A (en) * | 1976-06-15 | 1977-12-19 | Mitsui Constr | Steering device for transportation truck |
| JPS52169201U (en) * | 1976-06-15 | 1977-12-22 | ||
| DE8810077U1 (en) * | 1988-08-06 | 1988-10-06 | A F T Automatisierungs- Und Foerdertechnik Gmbh, 7888 Rheinfelden, De | |
| ITBZ20020013A1 (en) * | 2002-03-15 | 2003-09-15 | High Technology Invest Bv | EXCHANGE SYSTEM FOR ROPE TRANSPORT SYSTEMS WITH COUPLING TRANSPORT VEHICLES. |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US582436A (en) * | 1897-05-11 | Turn-table | ||
| US768239A (en) * | 1903-03-02 | 1904-08-23 | Marcius C Richards | Switch for carrier systems. |
| US1403853A (en) * | 1921-01-22 | 1922-01-17 | Hunt Helm Ferris & Co | Overhead switch |
| US2211220A (en) * | 1938-02-21 | 1940-08-13 | Verplanck Philip | Switching system |
| US3414194A (en) * | 1965-10-24 | 1968-12-03 | Louis Marx & Co. Inc. | Racing track |
| US3426703A (en) * | 1966-07-28 | 1969-02-11 | Raymond L Morris | Monorail vehicle system |
-
1973
- 1973-03-22 DE DE2314400A patent/DE2314400C2/en not_active Expired
-
1974
- 1974-02-05 CH CH156374A patent/CH566448A5/xx not_active IP Right Cessation
- 1974-02-14 AT AT120174A patent/AT334972B/en not_active IP Right Cessation
- 1974-03-08 CA CA194,507A patent/CA994171A/en not_active Expired
- 1974-03-08 US US449289A patent/US3905301A/en not_active Expired - Lifetime
- 1974-03-14 FR FR7408641A patent/FR2222486B1/fr not_active Expired
- 1974-03-20 NL NL747403789A patent/NL154288B/en unknown
- 1974-03-20 BE BE142196A patent/BE812542A/en unknown
- 1974-03-21 GB GB1270074A patent/GB1437165A/en not_active Expired
- 1974-03-22 JP JP49031581A patent/JPS49127305A/ja active Pending
- 1974-04-08 IT IT20647/74A patent/IT1007435B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US582436A (en) * | 1897-05-11 | Turn-table | ||
| US768239A (en) * | 1903-03-02 | 1904-08-23 | Marcius C Richards | Switch for carrier systems. |
| US1403853A (en) * | 1921-01-22 | 1922-01-17 | Hunt Helm Ferris & Co | Overhead switch |
| US2211220A (en) * | 1938-02-21 | 1940-08-13 | Verplanck Philip | Switching system |
| US3414194A (en) * | 1965-10-24 | 1968-12-03 | Louis Marx & Co. Inc. | Racing track |
| US3426703A (en) * | 1966-07-28 | 1969-02-11 | Raymond L Morris | Monorail vehicle system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0649804A1 (en) * | 1993-10-22 | 1995-04-26 | Neu Trans System (S.A.) | A rotary platform switch device for a pneumatic container transfer installation |
Also Published As
| Publication number | Publication date |
|---|---|
| NL154288B (en) | 1977-08-15 |
| FR2222486B1 (en) | 1976-10-08 |
| JPS49127305A (en) | 1974-12-05 |
| ATA120174A (en) | 1976-06-15 |
| DE2314400B1 (en) | 1974-04-11 |
| CH566448A5 (en) | 1975-09-15 |
| DE2314400C2 (en) | 1974-12-05 |
| CA994171A (en) | 1976-08-03 |
| FR2222486A1 (en) | 1974-10-18 |
| NL7403789A (en) | 1974-09-24 |
| BE812542A (en) | 1974-07-15 |
| GB1437165A (en) | 1976-05-26 |
| IT1007435B (en) | 1976-10-30 |
| AT334972B (en) | 1977-02-10 |
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