Home |
Search |
Today's Posts |
|
Woodworking (rec.woodworking) Discussion forum covering all aspects of working with wood. All levels of expertise are encouraged to particiapte. |
Reply |
|
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
|
#2
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
753. The lamps and cover suggest that something goes on the glass plate and
is lit by the lamps. Perhaps something goes on the glass plate under the cover and then the lamps shine onto it, something where part of the item has been coated somehow with light sensitive chemicals. I would say its for making printed circuit boards but it looks too old for that. Something to do with making plates for a printing press of some kind perhaps? 754. Looks like a clamp for some kind of scientific glassware perhaps (with the base resting on the metal extensions and the neck or body being held by the jaws of the clamp. 755. Some kind of mechanical, electric or power type chisel? Its hard to tell but there might have been an electric cable that goes into the handle at the bottom that powers it and then the trigger is pressed to make the blade/bar move in and out. |
#4
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
753 is a photographic contact printing frame. When larger negs or
plates were used there was no need to enlarge, so the negs were sandwiched with photographic paper (in "contact") and exposed to the light from the bulbs in the base. It could also be called a proofer. I'm so happy he's branching into photographic stuff... I have a hope of getting a few right ! |
#5
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
R.H. wrote:
This week's set has just been posted: http://puzzlephotos.blogspot.com/ 750. It looks like a screwdriver whose split handle can be folded down to increase torque. 751. No idea - but that shouldn't prevent a wild assed guess, right? Might be a sand rake for small Japanese Zen gardens. 752. Part of a clock dial with Roman numerals. 753. Light table for photography. It looks like some of the socket bases are replacements. 754. Bottle cap crimper. 755. Pneumatic chisel. R |
#6
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
R.H. wrote:
This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. -- Sir Benjamin Middlethwaite |
#7
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Jonathan Wilson wrote: .... 755. Some kind of mechanical, electric or power type chisel? Its hard to tell but there might have been an electric cable that goes into the handle at the bottom that powers it ... No, it's a pneumatic connector. You're right in general, however, it's a "pneumatic hand-held jackhammer" to paraphrase... |
#8
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
R.H. wrote: This week's set has just been posted: .... 750. Hard to see the blade clearly in perspective but I'm saying it is an early version of an angled screwdriver. Might have another specific purpose but the blade isn't clearly enough shown to tell--perhaps deliberate obfuscation??? 751. Screed -- for what particular purpose, I don't know. Could be for large tile, perhaps... Somebody already got the print frame and pneumatic chisel/hammer... I'm not so sure about the crimper guess---don't know I've ever seen an old hand crimping tool so don't know, but if so, don't know what part the stand plays--doesn't seem at all necessary, therefore Occam says... |
#9
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 752. Roman Numeral 4 on a clock. 754. Pop-up Sprinkler wrench 755. Chicago Pneumatic Air Chisel and with a chisel attachment. As common as the impact wrench and air ratchet in the automotive business. |
#10
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"dpb" wrote in message ups.com... Jonathan Wilson wrote: ... 755. Some kind of mechanical, electric or power type chisel? Its hard to tell but there might have been an electric cable that goes into the handle at the bottom that powers it ... No, it's a pneumatic connector. You're right in general, however, it's a "pneumatic hand-held jackhammer" to paraphrase... Jack hammer? Absolutely known as an Air Chisel in the automotive business and is commonly used to cut steel exhaust pipes using a split chisel. |
#11
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob My guesses: 750. Diving screwdriver 751. Brick laying/mortaring tool 752. IIII (on a clock or watch?) 753. Frame for creating blueprint copies. 754. Bottle cap crimper/remover 755. Air chisel Carl G. |
#12
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Carl G. wrote:
"R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob My guesses: 750. Diving screwdriver Would a wood handle be good for a tool repeatedly exposed to water under pressure? Bronze will corrode in salt water. I think was designed long ago for working around magnets, and the pivot is to use it in tight places. I wonder if it was for working on generators with permanent magnets. |
#13
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"Bart Byers" wrote in message
.. . Carl G. wrote: "R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob My guesses: 750. Diving screwdriver Would a wood handle be good for a tool repeatedly exposed to water under pressure? Bronze will corrode in salt water. I think was designed long ago for working around magnets, and the pivot is to use it in tight places. I wonder if it was for working on generators with permanent magnets. I agree about the wood handle scales. I'm not entirely convinced about it being bronze. I dropped the image in PS and adjusted for the white paper. It could be bronze, or it could be patina. However, nobody has commented yet on the flip-open handle, which would give a 12" t-bar... plenty of torque. |
#14
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
In article ,
R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ 750: I'm not going to say elevator key. 751: For working the surface of recently-poured concrete. 752: A roman numeral IIII on a clock 753: Ye Olde Xerox Machine 754: Another specialty wrench, have no idea what it's for 755: Air hammer -- There's no such thing as a free lunch, but certain accounting practices can result in a fully-depreciated one. |
#15
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Leon wrote: "dpb" wrote in message .... a "pneumatic hand-held jackhammer" to paraphrase... Jack hammer? Absolutely known as an Air Chisel ... Quotation marks and specifically saying "to paraphrase" aren't enough for ya'??? |
#16
Posted to rec.crafts.metalworking,rec.woodworking
|
|||
|
|||
What is it? CXXIX
750 - Looks kind of like a split handle Dzus fastener tool. 751 - Scraper tool? 752 - Numeral 3? 753 - Glass plate contact print table? 754 - Cap crimp tool 755 - Chicago Pneumatic 715K Heavy Duty air hammer (made in Utica NY) with long chisel bit. -- Steve W. Near Cooperstown, New York ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#17
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
753 is definitely a contact printer. It looks like it may have been cobbled
up out of existing components. The top cover/door has a hinge, which allows the user to close it part way and observe the alignment of the paper with the negative. The stand looks very well made, but not quite right for its use. Maybe converted from a typewriter desk. The inside should be painted white. The bulbs should all be the same. 754 looks like a tool for loosening the screw tops on bottles, but why the bent rod hook-hanger looking things? My suggestion is it is for gently holding the neck on a bottle of cheap wine, so the tipsy drinker has less chance of dropping it. ;-) |
#18
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"dpb" wrote in message ps.com... Leon wrote: "dpb" wrote in message ... a "pneumatic hand-held jackhammer" to paraphrase... Jack hammer? Absolutely known as an Air Chisel ... Quotation marks and specifically saying "to paraphrase" aren't enough for ya'??? I have been around air chisels since the early 70's and have never heard of them referred to as jack hammers. Correctly named they are hammers or air hammers. Jack hammers are typically held by 2 hands and are much larger. Perhaps it's a regional thing. |
#19
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
R.H. wrote:
This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753 looks like a light table and more specifically one for making contact prints. Can't tell the size but looks like for 8" x 10" negatives. |
#20
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ 752 is the Roman numeral 4 on a grandfather clock. 753 is obviously an antique photocopier.... ;-) ally |
#21
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Leon wrote: "dpb" wrote in message ps.com... Leon wrote: "dpb" wrote in message ... a "pneumatic hand-held jackhammer" to paraphrase... Jack hammer? Absolutely known as an Air Chisel ... Quotation marks and specifically saying "to paraphrase" aren't enough for ya'??? I have been around air chisels since the early 70's and have never heard of them referred to as jack hammers. Correctly named they are hammers or air hammers. Jack hammers are typically held by 2 hands and are much larger. Perhaps it's a regional thing. I have been around air chisels for at least as long and if you WOULD READ and understand what you read you would clearly see that I didn't call it a jackhammer, I used the term to give the other poster an idea what it does... paraphrase ( ) n. A restatement in another form or other words... Now, are you satisfied yet??? |
#22
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"dpb" wrote in message oups.com... I have been around air chisels for at least as long and if you WOULD READ and understand what you read you would clearly see that I didn't call it a jackhammer, I used the term to give the other poster an idea what it does... paraphrase ( ) n. A restatement in another form or other words... Now, are you satisfied yet??? To paraphrase, is to redescribe a text or passage in another form or other words. You did not do that. You mentioned a much larger tool/piece of equipment, the jackhammer. Ok, In my neck of the woods if you mention a Jackhammer a vision of a much larger tool that is often used to break up concrete comes to mind. If I said, hand me that hand held pile driver, would you think hammer? |
#23
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Leon wrote: "dpb" wrote in message oups.com... I have been around air chisels for at least as long and if you WOULD READ and understand what you read you would clearly see that I didn't call it a jackhammer, I used the term to give the other poster an idea what it does... paraphrase ( ) n. A restatement in another form or other words... Now, are you satisfied yet??? To paraphrase, is to redescribe a text or passage in another form or other words. You did not do that. You mentioned a much larger tool/piece of equipment, the jackhammer. .... I _DID_ do that (and said I was doing it, too!) Now, you can quibble over whether it was a good paraphrase, but there should have been no confusion whatsoever that I called the tool in question itself a jackhammer but you were simply looking for an excuse to slam somebody. |
#24
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"dpb" wrote:
Leon wrote: "dpb" wrote in message oups.com... I have been around air chisels for at least as long and if you WOULD READ and understand what you read you would clearly see that I didn't call it a jackhammer, I used the term to give the other poster an idea what it does... paraphrase ( ) n. A restatement in another form or other words... Now, are you satisfied yet??? To paraphrase, is to redescribe a text or passage in another form or other words. You did not do that. You mentioned a much larger tool/piece of equipment, the jackhammer. ... I _DID_ do that (and said I was doing it, too!) Now, you can quibble over whether it was a good paraphrase, but there should have been no confusion whatsoever that I called the tool in question itself a jackhammer but you were simply looking for an excuse to slam somebody. 1. Both Pneumatic 2. Both operate on the repeated explosive release of supplied compressed air. 3. Both have 'cutting blade-type' tip 4. Both held by a human and used to cut into things Seems like an excellent paraphrase to use to explain an air chisel to someone who knows what a jackhammer is. If you can't see that Leon, you don't understand one or other tool, or the English language. |
#25
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"The3rd Earl Of Derby" wrote:
R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. Which part does the magnification? |
#26
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Patrick Hamlyn wrote:
"The3rd Earl Of Derby" wrote: R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. Which part does the magnification? Plates didn't need magnification the camera done that. ;-) The negative plate was placed in the square housing and then the light switched on for a few seconds and then immersed in the developer. -- Sir Benjamin Middlethwaite |
#27
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
On Thu, 24 Aug 2006 14:36:59 -0700, dpb wrote:
Leon wrote: "dpb" wrote in message Leon wrote: "dpb" wrote in message a "pneumatic hand-held jackhammer" to paraphrase... Jack hammer? Absolutely known as an Air Chisel ... Quotation marks and specifically saying "to paraphrase" aren't enough for ya'??? I have been around air chisels since the early 70's and have never heard of them referred to as jack hammers. Correctly named they are hammers or air hammers. Jack hammers are typically held by 2 hands and are much larger. Perhaps it's a regional thing. I have been around air chisels for at least as long and if you WOULD READ and understand what you read you would clearly see that I didn't call it a jackhammer, I used the term to give the other poster an idea what it does... paraphrase ( ) n. A restatement in another form or other words... Now, are you satisfied yet??? How about, "Jill Hammer"? ;-) Cheers! Rich |
#28
Posted to rec.woodworking
|
|||
|
|||
What is it? CXXIX
Because "R.H." could, he/she/it opin'd:
This week's set has just been posted: http://puzzlephotos.blogspot.com/ OK, I'll give it a shot this time: 750: a screwdriver with a variable-angle handle. 751: ?? 752: The Roman numeral 4 from a antique clock (I have one just like it on the fireplace mantel). I don't know why they sometimes used IIII and sometimes used IV, but they did, 753: Looks like an ironing table for shirts, but what are the light bulbs for?? 754: Specialized pliers, but haven't a clue for what. 755: An air chisel; I have one quit a bit like it in my Man Garage This is fun! THANX!! -Don -- "What do *you* care what other people think?" --Arline Feynman |
#29
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
R.H. wrote:
This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 751. An early form of router bit for making * V * grooves. lol -- Sir Benjamin Middlethwaite |
#30
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
The3rd Earl Of Derby wrote:
Patrick Hamlyn wrote: "The3rd Earl Of Derby" wrote: R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. Which part does the magnification? Plates didn't need magnification the camera done that. ;-) The negative plate was placed in the square housing and then the light switched on for a few seconds and then immersed in the developer. You are digging a deeper hole. Most cameras don't magnify they make an image smaller than the real object. There is not lens in the object described, therefore it can't be an enlarger. Actually the paper is immersed in developer not the light. (which is what your sentence said). It would be easier if you just gave up! or better, admit that you were wrong. May insight be your gift. |
#31
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
According to R.H. :
This week's set has just been posted: http://puzzlephotos.blogspot.com/ O.K. Posting from rec.crafts.metalworking as usual. 750) A screwdriver on which you can swing the handle to the side, thus allowing a lot more torque. 751) For spreading mortar or cement. 752) The curvature of the tops and bottoms of the Roman numeral suggest that it is part of a dial like on a clockface. And (unless the image has been rotated) the presence of a '4' at the bottom suggests perhaps a counter from zero to seven for the days of the week -- so a secondary dial on a complex clock. 753) For contact printing large negatives. The tiny red bulb allows you to align things without exposing the paper. The spring fingers are designed to spread the clamp-down force over the whole of the negative and paper. 754) The gripper is about right for a bottle cap similar to that found on a ketchup bottle, however the support fingers below don't look right for that. Perhaps for unscrewing a sampling bottle from under something? 755) Compressed-air driven chisel. Now to see what others have said, and then crash. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#32
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"George E. Cawthon" wrote in message ... The3rd Earl Of Derby wrote: Patrick Hamlyn wrote: "The3rd Earl Of Derby" wrote: R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. Which part does the magnification? Plates didn't need magnification the camera done that. ;-) The negative plate was placed in the square housing and then the light switched on for a few seconds and then immersed in the developer. You are digging a deeper hole. Most cameras don't magnify they make an image smaller than the real object. There is not lens in the object described, therefore it can't be an enlarger. Actually the paper is immersed in developer not the light. (which is what your sentence said). It would be easier if you just gave up! or better, admit that you were wrong. May insight be your gift. Your first point seemed on the mark. There's no point in being intentionally obtuse pointing out a misplaced modifier. I'm relatively certain most people understood the meaning. todd |
#33
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
|
#34
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
On Fri, 25 Aug 2006 01:17:22 GMT, "The3rd Earl Of Derby"
wrote: ,;Patrick Hamlyn wrote: ,; "The3rd Earl Of Derby" wrote: ,; ,; R.H. wrote: ,; This week's set has just been posted: ,; ,; http://puzzlephotos.blogspot.com/ ,; ,; ,; Rob ,; ,; 753. Is a photographers homemade darkroom enlarger, the lifting ,; cover plate is where the negative glass plate is placed. ,; The bulbs act as the light source. ,; ,; Which part does the magnification? ,; ,;Plates didn't need magnification the camera done that. ;-) ,; ,;The negative plate was placed in the square housing and then the light ,;switched on for a few seconds and then immersed in the developer. Wrong. The negative plate is placed on the glass, then photo-paper is placed on the negative. The light is turned on for the appropriate length of time and the photo-paper (not the negative) is emersed in the developer. ;-) |
#35
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"dpb" wrote in message oups.com... I _DID_ do that (and said I was doing it, too!) Now, you can quibble over whether it was a good paraphrase, but there should have been no confusion whatsoever that I called the tool in question itself a jackhammer but you were simply looking for an excuse to slam somebody. Never mind. |
#36
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
"Patrick Hamlyn" wrote in message ... were simply looking for an excuse to slam somebody. 1. Both Pneumatic 2. Both operate on the repeated explosive release of supplied compressed air. 3. Both have 'cutting blade-type' tip 4. Both held by a human and used to cut into things The same comparison could be made between an 18 wheeler and a go cart. I suppose if you stretch your imagination and don't want or need an accurate comparison a jack hammer is similar to an air chisel, except that an air chisel can usually be pointed in any direction to accurately cut sheet metal, pipe, peen objects, cut small nuts and bolts and so on. I only see a jack hammer as a demolition tool. |
#37
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Most of them have been answered correctly this week:
750. Triple lever screwdriver, the handles fold down for better torque. 751. Not sure what this tool is for, see the answer page for a list a guesses. 752. Number 4 on a clock 753. Kodak Crown printer 754. Champaign bottle opener 755. Pneumatic zip gun Some new photos and a couple of links have been posted on the answer page: http://pzphotosan131tm.blogspot.com/ Rob |
#38
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Leon wrote:
"R.H." wrote in message .. . This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 752. Roman Numeral 4 on a clock. That would be IV, not IIII 754. Pop-up Sprinkler wrench 755. Chicago Pneumatic Air Chisel and with a chisel attachment. As common as the impact wrench and air ratchet in the automotive business. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#39
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
todd wrote:
"George E. Cawthon" wrote in message ... The3rd Earl Of Derby wrote: Patrick Hamlyn wrote: "The3rd Earl Of Derby" wrote: R.H. wrote: This week's set has just been posted: http://puzzlephotos.blogspot.com/ Rob 753. Is a photographers homemade darkroom enlarger, the lifting cover plate is where the negative glass plate is placed. The bulbs act as the light source. Which part does the magnification? Plates didn't need magnification the camera done that. ;-) The negative plate was placed in the square housing and then the light switched on for a few seconds and then immersed in the developer. You are digging a deeper hole. Most cameras don't magnify they make an image smaller than the real object. There is not lens in the object described, therefore it can't be an enlarger. Actually the paper is immersed in developer not the light. (which is what your sentence said). It would be easier if you just gave up! or better, admit that you were wrong. May insight be your gift. Your first point seemed on the mark. There's no point in being intentionally obtuse pointing out a misplaced modifier. I'm relatively certain most people understood the meaning. todd If you missed the point, then you missed the point. |
#40
Posted to rec.crafts.metalworking,rec.puzzles,rec.woodworking
|
|||
|
|||
What is it? CXXIX
Leon wrote:
"Patrick Hamlyn" wrote in message ... were simply looking for an excuse to slam somebody. 1. Both Pneumatic 2. Both operate on the repeated explosive release of supplied compressed air. 3. Both have 'cutting blade-type' tip 4. Both held by a human and used to cut into things The same comparison could be made between an 18 wheeler and a go cart. I suppose if you stretch your imagination and don't want or need an accurate comparison a jack hammer is similar to an air chisel, except that an air chisel can usually be pointed in any direction to accurately cut sheet metal, pipe, peen objects, cut small nuts and bolts and so on. I only see a jack hammer as a demolition tool. Leon, you are absolutely right. Some people, for whatever reason, just never get the point of being specific. There is a much relations ship of knife to a sword as there is a chisel to a jack hammer. Just heard on the TV, one news stations said they found a blasting cap in the luggage, another said they found a stick of dynamite. Exactly what I would expect from reporters who usually have little science or technical knowledge in any field. I think you could (should) expect a little higher standard of comments in a technical newsgroup. |