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  1. #1
    Join Date
    Nov 2018
    Posts
    1
    Country: United States

    Default Yale & Towne Cast Bronze Pin-tumbler Padlocks - 800 Series Models - Manufacture Date?

    I am wondering if anyone knows when Yale started producing their cast bronze, pin-tumbler padlocks of the 800 Series (such as the 830, 840, 850, etc. models)?

    I can find them in the 1908 Yale catalog but not in the 1893 catalog (I do not have any catalogs for years in between these). I have looked for patents and searched this forum unsuccessfully for an answer.

    Based on their build characteristics, I am guessing that they started being manufactured sometime after January 1901 when the patent application for the locking of the heel and toe of the shackle was filed (Patent #US685289) and before the spring of 1908 when the catalog was published. The Yale Paracentric key with the round bow and Y&T trefoil design (Patent #USD29786) seems to be the earliest key design associated with this series of padlocks.

    If someone on this forum could help me find the answer to this question I would appreciate it.

    Thank You,

    Tom

  2. #2
    Join Date
    Oct 2010
    Location
    Tonawanda, NY, USA
    Posts
    841
    Country: United States

    Default

    Quote Originally Posted by Iowa Tom L View Post
    I am wondering if anyone knows when Yale started producing their cast bronze, pin-tumbler padlocks of the 800 Series (such as the 830, 840, 850, etc. models)?

    I can find them in the 1908 Yale catalog but not in the 1893 catalog (I do not have any catalogs for years in between these). I have looked for patents and searched this forum unsuccessfully for an answer.

    Based on their build characteristics, I am guessing that they started being manufactured sometime after January 1901 when the patent application for the locking of the heel and toe of the shackle was filed (Patent #US685289) and before the spring of 1908 when the catalog was published. The Yale Paracentric key with the round bow and Y&T trefoil design (Patent #USD29786) seems to be the earliest key design associated with this series of padlocks.

    If someone on this forum could help me find the answer to this question I would appreciate it.

    Thank You,

    Tom
    The paracentric key is said to have been introduced in 1892 if that helps any. One source mentions 1904 as the date by which all Yale cylinder locks had the new paracentric keys.

    Pete Schifferli

  3. #3
    Join Date
    Aug 2014
    Posts
    85
    Country: United States

    Default Earliest 850 style locks...

    Quote Originally Posted by Iowa Tom L View Post
    I am wondering if anyone knows when Yale started producing their cast bronze, pin-tumbler padlocks of the 800 Series (such as the 830, 840, 850, etc. models)?

    I can find them in the 1908 Yale catalog but not in the 1893 catalog (I do not have any catalogs for years in between these). I have looked for patents and searched this forum unsuccessfully for an answer.

    Based on their build characteristics, I am guessing that they started being manufactured sometime after January 1901 when the patent application for the locking of the heel and toe of the shackle was filed (Patent #US685289) and before the spring of 1908 when the catalog was published. The Yale Paracentric key with the round bow and Y&T trefoil design (Patent #USD29786) seems to be the earliest key design associated with this series of padlocks.

    If someone on this forum could help me find the answer to this question I would appreciate it.

    Thank You,

    Tom
    The oldest example of this lock type that I have has the following imprinted into the top where it normally says “super pin tumbler”: “PATENTED AUG 11, 1891, SEPT 8, 1896, OTHERS PENDING”.

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