"Chelsea" Clock Museum
Joseph H. Eastman, 1843-1931
Joseph H. Eastman Obituary
E. Howard Harvard Boston Waltham Eastman "Chelsea"
"Chelsea" Clock Company Precision Regulators
Fairhaven MFG & Vermont Clock Companies
Little & Eastman & Derry MFG Companies
U.S. Navy, U.S.L.H.E., U.S.L.S.S., U.S. Coast Guard
"Chelsea" & the Decorative Arts 100 Years
"Chelsea" Advertisements Catalog Sequence
"Chelsea" Catalog 1906 "Chelsea" Catalog 1911 "Chelsea" Catalog 1923
"Chelsea" Leaflet A 1926
Serial Numbers Large Dial "Chelsea" Clocks Record Book One
Vintage "Chelsea" Clocks For Sale
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Chelsea Clock Company, The First Hundred Years
U. S. Patent and Design Patent Documents
Starting with the Harvard Clock Company and their first U. S. Patent, dated December 28, 1880, many inventors and the family of companies that followed the Harvard Clock Company produced designs that would set the foundation for the marine clocks of the next 125 years. The following table lists patent and design patent numbers, inventor, date, title and assignee. These patents can be viewed by clicking on the patent or design patent number links and scrolling down to view all pages. The Google Patent Search link below can be used to do your own patent searches, using patent/design number, inventor, patent date, patent title or assignee.
Google Patent Search
Patent/Design # Inventor Patent Date Patent Title Assignee
236,016 James H. Gerry December 28, 1880 Clock Harvard Clock Co.
236,017 James H. Gerry December 28, 1880 Winding Attachments for Clocks Harvard Clock Co.
343,629 Joseph H. Eastman June 15, 1886 Tandem Wind Movement Boston Clock Co.
343,947 Joseph H. Eastman June 15, 1886 Clock winding mechanism Boston Clock Co.
360,648 Charles Bickford Apr 5, 1887 Device for letting down Boston Boston Clock Co./C. Bickford
Tandem Wind Mainsprings
374,142 Abraham Craig Nov 29, 1887 Mode of Finishing Wheel Blanks Boston Clock Co.
394,816 Charles Bickford Dec 18, 1888 Remontoire for Boston Tandem Boston Clock Co./C. Bickford
482,393 Benjamin F. Stockford Sept 13, 1892 Speed & Whistle Recorder for Boston Clock Co./B. F. Stockford
500,717 John S. Negus July 4. 1893 Ship's Bell Clock Boston Clock Co./John S. Negus
533,581 Abraham Craig Feb 5, 1895 Clock A. Craig
613,183 George W. Adams Oct 25, 1898 Clock Striking Mechanism Chelsea Clock Co./C. H. Pearson
633,257 George W. Adams Sept 19, 1899 Clock Chelsea Clock Co./C. H. Pearson
650,979 Walter K. Menns Jun 5, 1900 Ship's Bell Clock Chelsea Clock Co./C. H. Pearson
664,886 George D. McMillan Jan 1, 1901 Ship's Bell Clock Vermont Clock Co./G. D. McMillan
689,899 Walter K. Menns Dec 31, 1901 Ship's Bell Clock Case Chelsea Clock Co./C. H. Pearson
D37411 Walter E. McGraw Apr 18, 1905 Design Patent M&M Base Chelsea Clock Co.
D37587 Walter E. McGraw Oct 24, 1905 Design Patent B&B Case Chelsea Clock Co.
D37736 Walter E. McGraw Dec 19, 1905 Design Patent Car Clock Case Chelsea Clock Co.
D38187 Walter E. McGraw Aug 21, 1906 Design Patent Library Case Chelsea Clock Co.
1,001,668 Walter K. Menns Aug 29, 1911 Automatic Ship's Bell Chelsea Clock Co.
1,025,821 Walter E. Mcgraw May 7, 1912 Device for Improving Tone of Gongs Chelsea Clock Co./C. H. Pearson
1,037,952 Walter K. Menns Sept 10, 1912 Speed Indicating & Recording Device Chelsea Clock Co.
1,089,246 Walter K. Menns Mar 3, 1914 Speed Indicating & Recording Device Chelsea Clock Co.
1,094,582 Walter K. Menns Apr 28, 1914 Stem Winding & Setting Mechanism Chelsea Clock Co.
1,099,307 Walter K. Menns June 9, 1914 Car Clock Wind & Set Chelsea Clock Co.
1,331,163 Walther K. Menns Feb 17, 1920 Stem Wind Car Clock Chelsea Clock Co.
1,354,674 Walter K. Menns Oct 5, 1920 Recording Timepiece Boston Clock Co.(Chelsea)
1,360,308 Walter K. Menns Nov 30, 1920 Time Controlling Mechanism (gaslight) Boston Clock Co. (Chelsea)
1,583,954 Frederick W. Bold May 11, 1926 Time Controlled Motor Boston Clock Co. ( Chelsea)
D82,389 Walter E. Mutz Oct 28, 1930 Design Patent Outside Auto Ship's Bell Chelsea Clock Co.
D96676 George J. King Aug 27, 1935 Design Patent for Clock Dial (radioroom) Chelsea Clock Co.
3,921,383 Anselm James Leone Nov 25, 1975 Mechanism for Tide Clock Bunker-Ramo Corporation
D302137 Richard F. Leavitt July 11, 1989 Design Patent for Quartz Clock Chelsea Clock Co.