US3842752A - Speed control - Google Patents
Speed control Download PDFInfo
- Publication number
- US3842752A US3842752A US00315060A US31506072A US3842752A US 3842752 A US3842752 A US 3842752A US 00315060 A US00315060 A US 00315060A US 31506072 A US31506072 A US 31506072A US 3842752 A US3842752 A US 3842752A
- Authority
- US
- United States
- Prior art keywords
- car
- probe
- linkage arm
- pivot means
- wheels
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/12—Systems with propulsion devices between or alongside the rails, e.g. pneumatic systems
- B61B13/125—Systems with propulsion devices between or alongside the rails, e.g. pneumatic systems the propulsion device being a rotating shaft or the like
Definitions
- ABSTRACT A speed control device for an operator-less, remotely controlled unit carrier system in'which a plurality of cars are driven over a trackway by means of thefrictional interaction of propulsion and reaction wheels.
- the device comprises a slidably mounted, springloaded probe normally extending some distance in front of each car but capable of being forced back relative to the body of the car by contact with the back of the preceding car.
- This probe is connected to either the propulsion wheels or the reaction wheels, whichever are mounted in the cars, such that their angle with respect to the wheels not mounted in the cars is varied from an angle giving a maximum speed to the car when the probe is maximally extended to an angle giving zero forward impetus to the car.
- This invention relates generally to controlling the speed of the cars in an operator-less, remotely controlled unit carrier system in which a plurality of cars are driven over a trackway by means of the frictional interaction of propulsion and reaction wheels and, more specifically, to controlling the speed of the cars in a unit carrier system such as disclosed in commonly assigned U.S. Pat. Nos. 3,621,790, 3,626,859 and 3,650,216.
- Devices according to this invention include a slidably mounted, spring-loaded probe normally extending some distance in front of each car but capable of being forced back relative to the body of the car by contact with the back of the preceding car.
- This probe is connected to either the propulsion wheels or the reaction wheels, which ever are mounted in the cars, such that their angle with respect to the wheels not mounted in the cars is varied from an angle giving a maximum speed to the car when the probe is maximally extended to an angle giving zero forward impetus to the car.
- the connection may be such that the reaction wheels actually give reverse impetus to the car if the probe is pushed back still farther.
- FIG. 1 is a plan view of the underside of a unit carrier system car incorporating one embodiment of the present invention, showing the car-mounted wheels turned to an angle giving the car forward drive.
- FIG. 2 is a plan view of the underside of the unit carrier system car shown in FIG. 1 with the car-mounted wheels turned to an angle giving the car no forward drive.
- FIG. 3 is an end view of the car shown in FIG. 1.
- FIG. 4 is an enlargement ofa portion of FIG. 1, showing the mounting of one of the car-mounted wheels in further detail.
- FIG. 5 is an enlargement of a portion of FIG. 2, also showing the mounting of one of the car-mounted wheels in further detail.
- FIGS. 1, 4, and 5 show a portion of a drive tube 10 superimposed in phantom lines on the bottom of the car 12 depicted therein. This is to permit better visualization of the attack angle a, which is expressly shown in FIG. 4. When this angle is zero, no impetus is imparted to the car, and when it is more than zero, a forward impetus is imparted to the car. While the embodiment described herein does not provide for an angle a of less than zero, it could be readily adapted to provide for negative attack angle, and, if it were so adapted, a backwards impetus would be imparted to the car. The interaction of the drive tube and the reaction wheels,
- FIGS. 1 and 4 show the probe 14 fully extended.
- the probe 14 is slidably mounted in a bearing 16 which depends from the front bottom of the car 12.
- the probe 14 is also slidably mounted in a bearing 18 which depends from the bottom of the car near the center thereof and a bearing 20 which depends from the bottom of the car just rearward of the extreme position assumed by the rear pivot 22.
- This latter'relationship is best seen in FIG. 2.
- the distance that the bearings depend beneath the bottom of the car is such that the probe 14 is at the same level as the axes of the reaction wheels 24, as may be seen in FIG. 3.
- a stop plate 26 which serves two purposes. First, its forward face serves to limit the travel of the probe 14 so that the attack angle a cannot take on a negative value. Second, as may be seen in FIGS. 2 and 5, its rearward face serves as an engagement surface for the probe on the front of the following car, thereby permitting the probe to serve as a speed-control device as taught herein. Obviously, if the rear of the body of the car extends low enough, no separate stop plate is required, the body of the car serving the same function.
- a front pivot 28 and a rear pivot 22 Mounted on the probe 14 are a front pivot 28 and a rear pivot 22. Each pivot is connected to a linkage arm 30 having a slot therein at the end connected to the probe 14 to permit lost motion as the probe 14 moves linearly to the rear and the linkage arm pivots around an axis coextensive with the axis of a pin 32 mounted on the bearing 34 supporting the reaction wheel 24.
- the linkage arm30 and the pin 32 are solidly joined together so that the rotational motion .of the linkage arm 30 is transmitted to the bearing 34.
- the linkage arm 30 extends beyond the pin 32 for some distance and in connection at the far end thereof to a spring 36 which biases the linkage arm 30 in the clockwise direction, thereby biasing the probe 14 towards its fully extended position.
- the spring 36 is connected to the underside of the car 10 in any suitable fashion.
- the reaction wheels 24 are mounted for rotation about bearings 34, and each unit comprising a reaction wheel 24 and a bearing 34 is mounted for a limited rotation about the axis of the pin 32, which is perpendicular to the body of the car 10.
- the attack angle a may be varied from zero to a pro-selected maximum.
- the mounting of the units comprising a reaction wheel 24 and a bearing 34 may be in any conventional manner.
- the mounting stands shown in commonly assigned US. Pat. Nos. 3,621,790 and 3,650,216 may be easily adapted for rotation and for mounting on the bottom of the cars rather than in the trackway, as shown therein.
- FIGS. 1, 2, and 3 also show support wheels 38, guide probes 40 and rails 42, the purpose and function of which are explained in detail in commonly assigned application Ser. No. 306,487, tiled Nov. l4, 1972, and accordingly need not be explained in further detail here.
- a pivot means permitting the one of said wheels which is mounted on the underside of said car to rotate about an axis which is perpendicular to the body of the car;
- a linkage arm operatively connecting said probe to said pivot means, said linkage arm being integrally connected to said pivot means intermediate the ends of said linkage arm and having a slot therein located where said said linkage arm is connected to said probe to permit lost motion as said probe moves linearly and said linkage arm rotates about said pivot means;
- a device as claimed in claim 1 further comprising a stop plate, one side of which may serve as an engagement surface for a probe on the'front of a second, similar car following said car, whereby the speed of said second car may be controlled.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00315060A US3842752A (en) | 1972-12-14 | 1972-12-14 | Speed control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00315060A US3842752A (en) | 1972-12-14 | 1972-12-14 | Speed control |
Publications (1)
Publication Number | Publication Date |
---|---|
US3842752A true US3842752A (en) | 1974-10-22 |
Family
ID=23222707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00315060A Expired - Lifetime US3842752A (en) | 1972-12-14 | 1972-12-14 | Speed control |
Country Status (1)
Country | Link |
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US (1) | US3842752A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4036148A (en) * | 1975-11-06 | 1977-07-19 | Si Handling Systems, Inc. | Vehicle and track system |
US4326465A (en) * | 1980-05-27 | 1982-04-27 | Sid Forrest | Automobile tow wheel attachment |
US4532869A (en) * | 1982-08-24 | 1985-08-06 | Tsubakimoto Chain Company | Pallet conveying system |
US4593623A (en) * | 1984-04-10 | 1986-06-10 | Heico Inc. | Reversible, accumulating longitudinal drive tube carrier |
US4646648A (en) * | 1985-03-18 | 1987-03-03 | Lindbom Torsten H | Carrier moving apparatus with variable ratio transmission |
US4648325A (en) * | 1985-06-20 | 1987-03-10 | Heico Inc. | Linear drive unit |
US4691641A (en) * | 1986-02-21 | 1987-09-08 | Si Handling Systems, Inc. | Vehicle accumulation system |
US4791872A (en) * | 1987-03-30 | 1988-12-20 | Psi | Vehicle and track system |
US4798147A (en) * | 1987-04-22 | 1989-01-17 | Si Handling Systems, Inc. | Drive wheel adjuster for driverless vehicle |
US4825135A (en) * | 1987-11-17 | 1989-04-25 | Hypermotion, Inc. | Method and apparatus for providing mechanical amplification |
US4846074A (en) * | 1988-03-22 | 1989-07-11 | Rockford Automation | Conveyor pallet construction |
US4909153A (en) * | 1986-06-05 | 1990-03-20 | Critt Productique | Transport systems using passive vehicles |
US5080220A (en) * | 1990-10-24 | 1992-01-14 | Mid-West Conveyor Company, Inc. | Accumulating pallet conveyor |
-
1972
- 1972-12-14 US US00315060A patent/US3842752A/en not_active Expired - Lifetime
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4036148A (en) * | 1975-11-06 | 1977-07-19 | Si Handling Systems, Inc. | Vehicle and track system |
US4326465A (en) * | 1980-05-27 | 1982-04-27 | Sid Forrest | Automobile tow wheel attachment |
US4532869A (en) * | 1982-08-24 | 1985-08-06 | Tsubakimoto Chain Company | Pallet conveying system |
US4593623A (en) * | 1984-04-10 | 1986-06-10 | Heico Inc. | Reversible, accumulating longitudinal drive tube carrier |
US4646648A (en) * | 1985-03-18 | 1987-03-03 | Lindbom Torsten H | Carrier moving apparatus with variable ratio transmission |
US4648325A (en) * | 1985-06-20 | 1987-03-10 | Heico Inc. | Linear drive unit |
US4691641A (en) * | 1986-02-21 | 1987-09-08 | Si Handling Systems, Inc. | Vehicle accumulation system |
US4909153A (en) * | 1986-06-05 | 1990-03-20 | Critt Productique | Transport systems using passive vehicles |
US4791872A (en) * | 1987-03-30 | 1988-12-20 | Psi | Vehicle and track system |
US4798147A (en) * | 1987-04-22 | 1989-01-17 | Si Handling Systems, Inc. | Drive wheel adjuster for driverless vehicle |
US4825135A (en) * | 1987-11-17 | 1989-04-25 | Hypermotion, Inc. | Method and apparatus for providing mechanical amplification |
US4846074A (en) * | 1988-03-22 | 1989-07-11 | Rockford Automation | Conveyor pallet construction |
US5080220A (en) * | 1990-10-24 | 1992-01-14 | Mid-West Conveyor Company, Inc. | Accumulating pallet conveyor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WADE, WILLIAM J., RODNEY SQUARE NORTH, WILMINGTON Free format text: SECURITY INTEREST;ASSIGNOR:REXNORD INC.;REEL/FRAME:004817/0047 Effective date: 19870430 Owner name: WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WIL Free format text: SECURITY INTEREST;ASSIGNOR:REXNORD INC.;REEL/FRAME:004817/0047 Effective date: 19870430 Owner name: REXNORD INC. Free format text: CHANGE OF NAME;ASSIGNOR:REX CHAIN BELT INC.;REEL/FRAME:004713/0513 Effective date: 19850905 |
|
AS | Assignment |
Owner name: REXNORD HOLDINGS INC., 350 N. SUNNY SLOPE, BROOKFI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REXNORD INC., A CORP. OF WI;REEL/FRAME:004938/0476 Effective date: 19880808 |
|
AS | Assignment |
Owner name: WILMINGTON TRUST COMPANY AND WADE WILLIAM J. AS TR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. AMENDED SECURITY AGREEMENT;ASSIGNOR:REXNORD HOLDINGS INC., A CORP. OF DE;REEL/FRAME:004945/0853 Effective date: 19880816 Owner name: WILMINGTON TRUST COMPANY AND WADE WILLIAM J. AS TR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REXNORD HOLDINGS INC., A CORP. OF DE;REEL/FRAME:004945/0853 Effective date: 19880816 |
|
AS | Assignment |
Owner name: CITICORP NORTH AMERICA, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WILMINGTON TRUST COMPANY;WADE, WILLIAM J.;REEL/FRAME:007677/0077 Effective date: 19950222 |