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I have read with interest your notes from time to time in HOROLOGY on the making and use of fly cutters used in watch wheel cutting.
For a number of years I have used a type of fly or wheel cutter that has proven very satisfactory and during a recent chat with Major Paul M. Chamberlain he told me that others might be interested and suggested that I submit the idea for your approval.
I first cut a steel blank about 1/8" in thickness from a round piece of drill rod 5/8" diameter, using a cutting off tool in slide rest so as to leave the sides true and smooth.
Next drill and ream a hole through the blank the exact diameter of the wheel cutter arbor which you intend to use, place the round blank on the arbor and tighten the collars down hard, next put arbor with blank in lathe and form the outside with graver or tool in slide rest, making the disc or blank exact shape of wheel you wish to cut. In the case of a hardened steel winding gear I have used the old wheel as a form tool in the final finishing of the cutter, this is done, by clamping the old wheel with a small toolmaker's clamp on to a piece of steel that will fit in the tool post of your slide rest then run the old wheel up on the blank letting it scrape off any surplus material.
After the cutter is formed, remove same from arbor and enlarge hole .008 to .010 over arbor diameter. A portion of the cutter is then ground away making the cutting edge (see sketch for detail).
The cutter is then hardened and tempered and reground on the cutting edge mentioned in previous paragraph, same is now ready for use and is replaced on the arbor and while collars are tightened the cutter is held off center as far as it will go caused by looseness on arbor towards the cutting edge. This gives the cutter its proper clearance or backing off, on account of this type of construction the slight drag on back of cutter gives a nice burnishing action which really makes a smoother job than regular type relieved cutter. The cutter can be ground indefinitely, always replacing same on arbor so that cutting edge will be on high side.
Note the spade hour and minute hands don't match the second hand. The second hand is original. This watch had been missing its crystal for awhile and had developed significant rust issues. The hour and minute hands had to be replaced.
A subscriber, Leonard P. Coggin, of Philadelphia, writes "I have two suggestions that I'd like to make at this time.
"The first idea is for you to create a new department in your magazine, a suggestion department. This department will advertise that it will publish any shop wrinkles that readers will send in.
If you like you can offer a monthly or annual prize to stimulate interest in this new feature. Suggestions may be little gadgets that help the watchmaker in his work, easy short-cuts, methods or what have you.
"The second suggestion is this, 'Why don't you publish an annual index to your publication?' This will make it very much easier to locate an article in a back issue."
Thank you, Mr. Coggin. Your suggestions are most welcome. HOROLOGY has decided to carry them out and at this time formally announces the new Suggestion Department. It will appear for the first time in the December issue. This department will be open to all horologists who have any contributions of a practical nature which will be of assistance in every day work. A prize of five dollars will be awarded monthly for the best suggestion.
All contributions should be addressed to HOROLOGY, Suggestion Department, 747 South Hill Street, Los Angeles. Whenever possible a sketch, drawing or photograph should accompany same.
HOROLOGY reserves the right to publish any or all of the suggestions submitted and will be the sole judge of the prize winning suggestion.
The matter of an index is being given consideration and a decision will be reached soon.
From Horology magazine, November, 1937
Tightening Cannon Pinions
Answer: The use of the triangular punch for tightening a cannon pinion cannot be too strongly condemned. Aside from the mutilation of the pinion the friction thus created is never lasting or smooth. Even if these three nicks should survive long enough to be pushed on the post, the first few times the hands are set they will wear off. For tightening an ordinary cannon pinion there is nothing better than the cutting plier illustrated in Figure 2. The edges of this plier are very thin enabling one to get into the narrow groove of a small pinion without burring the square sides of the groove. Of no less importance is the adjustable stop screw, an absolute assurance that the pinion will not be cut in two. In addition one should always insert a round steel broach in the pinion while tightening it.
NOTE (This column is ~ours uncensored or edited. We assume no responsibility for statements made.)
By J. H. HUFF. Flagstaff, Arizona
"Just a word in addition to the article in the November issue of the AMERICAN HOROLOGIST by Mr. Pentcheck regarding the method of finding the troubles between the fork and roller table.
"His method is very good so far as he went, but there is at least one more test that I think should be made.
"In performing all the tests he gives, it is very evident that all are made with the watch lying flat on the desk D. D. postion. Now should the roller jewel be so low as to just clear the gua,rd pin all would be O. K., but due to the fact that the pallet arbor has or may have more end shake than does the balance staff, then in turning the watch in the D. U. position the roller Jeweler could then come in contact with the guard pin either stopping the watch or rubbing enough on the pin to retard the motion of the balance and impair the possibility of regulating.
One of a series of little biographies of Elgin Watches
From American Horologist magazine, October 1938
By W. H. SAMELIUS, Chairman, National Technical Board
All that we know about time the astronomers have taught us. The only absolute measure of time is the stately procession of the stars as the revolution of the earth brings them across the zenith.
But, for convenience in the everyday affairs of men, "time" must always mean what our watches tell of the passing human hours, minutes and seconds.
So one of the great practical services of the astronomer today is to contribute star-time precision to the making of watches for men and women.
And as the Elgin Professional Watch Makers are never satisfied to do anything by halves, years ago they established a Tim Observatory at the Elgin Watch Factory, for the sole purpose of taking star observations. And so supplying the most precise time standards to the making of Elgin Watches.
All through the Elgin Factories the electric sounders are reproducing the ticks of the Observatory Master Clock, checked by star-time.
Every process in adjusting and timing the Elgin Railroad Watch carried by the conductor and engineer of your morning train was performed in the light of these standards.
So, too, with your own pocket watch; your Elgin Strap Watch; the Elgin Wrist Watch you gave your wife or daughter. Not a single watch ever comes from Elgin gains in professional timekeeping character from the work of the Elgin Time Observatory.
Nor is this all. To every man and woman in the Elgin factories, the Time Observatory is an inspiration - a constant reminder of their obligation to all who buy Elgin Watches.
The watch-owner, too, feels the inspiration in higher understanding of timekeeping standards, and the desire for better and better watches.
And the Time Observatory of the Elgin Watch comes in a peculiar and literal sense to be the "Old Homestead of Father Time."
The planets, moon and stars, will be brought "down to earth" at the 1939 Golden Gate International Exposition on San Francisco Bay.
To the edification of millions of visitors to the Hall of Science at the $50,000,000 World's Fair of the West, the whole galaxy of the universe will be brought down to the level of the human eye by means of a vast astronomical exhibit planned by the University of California.
Center of the display, which will be a part of the University's $1,500,000 array of exhibits, will be a model of the 700ton telescope now being installed on Mount Palomar in Southern California. It will be built exactly to scale, with the 200-inch mirror being duplicated by an eight-inch facsimile, and every other feature being faithfully reproduced in proportion.
The telescope will be flanked on either side by a series of transparencies giving close-ups of the planets and other heavenly bodies. One panel will show the moon as if it were brought within 24 miles of the earth. Other panels will show the relation of time to the planets and still another set of transparencies will show the relation of astronomical bodies to everyday human life.
When completed, the Mount Palomar telescope is expected to open new lines of exploration in the universe. The Exposition model will show exactly how this is to be done, at least a year before it is actually accomplished.
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