GB292516A - Pneumatic hammer testing machine - Google Patents
Pneumatic hammer testing machineInfo
- Publication number
- GB292516A GB292516A GB17788/28A GB1778828A GB292516A GB 292516 A GB292516 A GB 292516A GB 17788/28 A GB17788/28 A GB 17788/28A GB 1778828 A GB1778828 A GB 1778828A GB 292516 A GB292516 A GB 292516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hammer
- blows
- specimen
- intensity
- test piece
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/005—Devices for testing the tool's performance
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
292,516. Takahashi, T. June 20, 1927, [Convention date]. Dynamometers.-Comprises a device for determining the effective horse power, the number of blows, and the intensity of the recoil of a pneumatic hammer. The hammer is gripped by two holders 3, 4 which can slide on a base 1 on which also slides a push plate 2. A test piece 6 of malleable material with a very low yield point is carried at one end by a fixed part 7 and at the other end by a sliding part 8. The hammer together with the parts 2, 3, 4 are drawn by a spring 15 adjustable by a screw 16 so that the hammer head 10 engages the part 9 and the hammer is allowed to deliver a sequence of blows on the part 9 for a given time. The energy communicated to the part 9 is measured by the deformation of the specimen 6 the properties of which are known from independently prepared stress-strain diagrams, and the horse-power may be calculated. The work done by the hammer may also be calculated by measuring the total heat generated in the test piece. The number of blows and the intensity of the recoils can be obtained by measuring the frequency and amplitude of the vibrations by means of a vibroscope. The specimen may be arranged so as to be under compression instead of tension. The invention may be applied to rock drills.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP292516X | 1927-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB292516A true GB292516A (en) | 1929-09-19 |
Family
ID=12271035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17788/28A Expired GB292516A (en) | 1927-06-20 | 1928-06-19 | Pneumatic hammer testing machine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB292516A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2597758A (en) * | 1945-08-28 | 1952-05-20 | Us Navy | Setback gauge |
| WO2010025353A1 (en) * | 2008-08-28 | 2010-03-04 | Cleveland Brothers Equipment Co., Inc. | Hammer test bench |
-
1928
- 1928-06-19 GB GB17788/28A patent/GB292516A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2597758A (en) * | 1945-08-28 | 1952-05-20 | Us Navy | Setback gauge |
| WO2010025353A1 (en) * | 2008-08-28 | 2010-03-04 | Cleveland Brothers Equipment Co., Inc. | Hammer test bench |
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