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2. Premature ventricular contraction - Wikipedia

   en.wikipedia.org/wiki/Premature_ventricular...

   A premature ventricular contraction (PVC) is a common event where the heartbeat is initiated by Purkinje fibers in the ventricles rather than by the sinoatrial node. PVCs may cause no symptoms or may be perceived as a "skipped beat" or felt as palpitations in the chest. PVCs do not usually pose any danger. [1]

3. Ectopic beat - Wikipedia

   en.wikipedia.org/wiki/Ectopic_beat

   An ectopic beat can be further classified as either a premature ventricular contraction (PVC), or a premature atrial contraction (PAC). [1] Some patients describe this experience as a "flip" or a "jolt" in the chest, or a "heart hiccup", while others report dropped or missed beats. Ectopic beats are more common during periods of psychological ...

4. Concealed conduction - Wikipedia

   en.wikipedia.org/wiki/Concealed_conduction

   A common example would be an interpolated PVC (a type of premature ventricular contraction) during normal sinus rhythm; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node. However, this AV node stimulation can cause a delay in subsequent AV conduction by modifying ...

5. Circular saw - Wikipedia

   en.wikipedia.org/wiki/Circular_saw

   A hand-held circular saw is the most conventional circular saw. This miter saw is a circular saw mounted to swing to crosscut wood at an angle. A table saw. Tractor-driven circular saw. A circular saw or a buzz saw, is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor.

6. Riving knife - Wikipedia

   en.wikipedia.org/wiki/Riving_knife

   A splitter is a stationary blade of similar thickness to the rotating saw blade mounted behind it to prevent a board from pinching inward into the saw kerf and binding on the saw blade, potentially causing a dangerous kickback. [7] Like a riving knife, its thickness should be greater than the body of the saw blade but thinner than its kerf. [7]

7. Tabitha Babbitt - Wikipedia

   en.wikipedia.org/wiki/Tabitha_Babbitt

   The circular saw was connected to a water-powered machine to reduce the effort to cut lumber. [4] [5] The first circular saw she allegedly made is in Albany, New York. [6] In the summer of 1948, a version of Babbitt's saw, built to her specifications, was on display at a Shaker exhibit at Fenimore House in Cooperstown, N. Y., as a loan from the ...

8. Strob Saw Blade - Wikipedia

   en.wikipedia.org/wiki/Strob_Saw_Blade

   Strob Saw Blade as depicted in Strobel's original patent application. The Strob rakers are numbered '17' in the diagram Strob Saw Blades are circular saw blades with the addition of two or more specialised raker /cutters and were invented by Keene S. Strobel (1907–1989) [ 1 ] of Everett and Peter E. Heiser of Issaquah . [ 2 ]

9. Oscillating multi-tool - Wikipedia

   en.wikipedia.org/wiki/Oscillating_multi-tool

   A non-symmetric scraper blade for an oscillating power tool Saw blade for an oscillating power tool. Various attachments and blades are on the market, giving these machines a wide variety of uses. The blades can be separated into 5 main categories: cutting; tile, grout and masonry; sanding; scraping; and polishing.