GB578496A - Improvements in instruments for measuring properties of rubber and rubber-like materials - Google Patents
Improvements in instruments for measuring properties of rubber and rubber-like materialsInfo
- Publication number
- GB578496A GB578496A GB1691744A GB1691744A GB578496A GB 578496 A GB578496 A GB 578496A GB 1691744 A GB1691744 A GB 1691744A GB 1691744 A GB1691744 A GB 1691744A GB 578496 A GB578496 A GB 578496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- rotor
- motor
- under
- clutch
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
578,496. Testing physical qualities. HENLEY'S TELEGRAPH WORKS CO., Ltd., W. T., and MAcDONALD, H. A. Sept. 5, 1944, No. 16917. [Class 106 (ii)] In a rotary cylinder plastometer for measuring the properties of rubber-like materials, the chamber, which houses the driven rotary member and is adapted to be filled with the material to be tested under pressure, is mounted to be rotatable about its axis, but is locked, when it is desired to measure the shearing viscosity, by means which can be released when the rotor is stopped so that the chamber rotates under the forces of recovery to an extent that can be observed with the aid of an indicating device associated with the chamber. In its simplest form (Fig. 1) the apparatus comprises a chamber 1 and rotor 2, between which the material under test is contained under pressure, and an electric motor 6 which drives the rotor through a high ratio worm and worm-wheel gear 8. For shearing viscosity measurements, the chamber is locked by a pin 9 and the torque, which is a measure of the shearing viscosity, is obtained by measuring the endwise thrust on the worm-wheel shaft. By means of relays (not shown) the motor is then switched off and simultaneously a brake 12, 13 is operated electromagnetically. A retarded relay then operates a solenoid which withdraws the pin 9, allowing the chamber to rotate on ball bearings 3 under the forces of recovery of the material, the rotor being locked by the worm gear. A scale on the chamber co - operates with a stationary pointer 11 to indicate the extent of the rotation. Owing to the large inertia of the armature of the motor, it is advantageous to insert a clutch so that the armature may be disconnected from the rotor. The clutch may be inserted between the motor and the reduction gear or between the latter and the rotor as shown in Fig. 3. In this case, when the motor is switched off, a solenoid 26 is also deenergized so that, under the action of a spring 31, a lever 25 disengages the clutch and brings a friction plate 32 on the shaft of the rotor into contact with a similar but stationary plate. The rotor is thus stopped and then further movement of the lever 25, allowed by compression of the spring 35, withdraws the pin 9. To repeat the procedure, the motor and the solenoid 26 are re-energized, whereupon the latter re-engages the clutch and, when the chamber has rotated sufficiently, the pin 9 is pressed into its recess in the chamber under the action of a spring 36.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1691744A GB578496A (en) | 1944-09-05 | 1944-09-05 | Improvements in instruments for measuring properties of rubber and rubber-like materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1691744A GB578496A (en) | 1944-09-05 | 1944-09-05 | Improvements in instruments for measuring properties of rubber and rubber-like materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB578496A true GB578496A (en) | 1946-07-01 |
Family
ID=10086003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1691744A Expired GB578496A (en) | 1944-09-05 | 1944-09-05 | Improvements in instruments for measuring properties of rubber and rubber-like materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB578496A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1573713B1 (en) * | 1965-09-27 | 1971-04-29 | Monsanto Co | Metal molding for enclosing an elastomer sample under pressure |
EP0132056A1 (en) * | 1983-07-15 | 1985-01-23 | Spri Limited | Rheometer and method of use thereof |
-
1944
- 1944-09-05 GB GB1691744A patent/GB578496A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1573713B1 (en) * | 1965-09-27 | 1971-04-29 | Monsanto Co | Metal molding for enclosing an elastomer sample under pressure |
EP0132056A1 (en) * | 1983-07-15 | 1985-01-23 | Spri Limited | Rheometer and method of use thereof |
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