Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 112 views

    Itr CC - 2407M162

    Uploaded by

    Theodor Eike
    The document summarizes the specifications and features of the IBM Number 16 weight-driven master clock from 1939. It has the following key features: - It is self-regulating and has a motor wound movement that can be automatically rewound after power failures to maintain power on the movement. - It has a Graham dead beat escapement and precision gears to keep time to within 10-30 seconds per month depending on the pendulum type. - The 18 lb movement is housed in a heavy iron and wood case and uses ball bearings and a differential mechanism to maintain power on the escapement during winding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Itr CC - 2407M162

    Uploaded by

    Theodor Eike
    112 views3 pages
    The document summarizes the specifications and features of the IBM Number 16 weight-driven master clock from 1939. It has the following key features: - It is self-regulating and has a motor wound movement that can be automatically rewound after power failures to maintain power on the movement. - It has a Graham dead beat escapement and precision gears to keep time to within 10-30 seconds per month depending on the pendulum type. - The 18 lb movement is housed in a heavy iron and wood case and uses ball bearings and a differential mechanism to maintain power on the escapement during winding.

    Original Description:

    clocks

    Original Title

    itr cc_2407M162

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    The document summarizes the specifications and features of the IBM Number 16 weight-driven master clock from 1939. It has the following key features: - It is self-regulating and has a motor wound movement that can be automatically rewound after power failures to maintain power on the movement. - It has a Graham dead beat escapement and precision gears to keep time to within 10-30 seconds per month depending on the pendulum type. - The 18 lb movement is housed in a heavy iron and wood case and uses ball bearings and a differential mechanism to maintain power on the escapement during winding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    112 views3 pages

    Itr CC - 2407M162

    Uploaded by

    Theodor Eike
    The document summarizes the specifications and features of the IBM Number 16 weight-driven master clock from 1939. It has the following key features: - It is self-regulating and has a motor wound movement that can be automatically rewound after power failures to maintain power on the movement. - It has a Graham dead beat escapement and precision gears to keep time to within 10-30 seconds per month depending on the pendulum type. - The 18 lb movement is housed in a heavy iron and wood case and uses ball bearings and a differential mechanism to maintain power on the escapement during winding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    You are on page 1of 3

    [The following is a reproduction of an IBM product data sheet published probably in February

    1939 on the Number 16 weight-driven master clock - motor wound.]

    Data Sheet I-MC-5

    WEIGHT DRIVEN MASTER CLOCK—MOTOR WOUND

    Specifications

    INTERNATIONAL MASTER CLOCK, self regulating motor wound weight driven


    movement, reserve power several days, movement automatically rewound after current failure on
    restoration of power. Power maintained on movement while winding through differential
    winding gear. Graham dead beat escapement, 60 beat micrometer adjustment with Mercurial
    (Invar) or (Metal Ball) pendulum. Time Rating plus or minus per month (Mercurial
    pendulum—10 seconds) (Invar pendulum—15 seconds) (Metal Ball—30 seconds). Precision cut
    hard brass gears burnished and plated to prevent oxidation. Pinions stainless steel machine cut
    and burnished.

    2407M162
    2

    Master Clock Movements And Case Details

    Weight of movement exclusive


    of pendulum, weights, dial, etc.,
    18 lbs.

    Overall dimensions of
    movement, 12 inches high by
    11¾ inches wide, with
    center-arbor 8¾ inches below top
    of movement.

    Heavy, ribbed, iron base-plate


    casting holds movement and
    pendulum in rigid alignment with
    each other.

    Motor is spring mounted and


    cushioned with rubber to insure
    quiet operation.

    The motor is a standard 1/70


    horsepower series wound
    universal type for 100 to 125 volt
    commercial lighting power supply, either A.C. or D.C. It uses about ½ ampere to start and about
    1/3 ampere while running.

    A standard toggle switch controlled by the position of the weights is used to automatically cut the
    motor in and out.

    The escapement is free running, all contacts being operated by metal cams carried on shafts
    independent of the escape train.

    The movement plates are of 1/8 inch hard brass with all bearings lined reamed in position to
    insure perfect alignment. All pivot bearings are jewel-cut and burnished to care for end-thrust in
    the arbors.

    Ball bearings packed in special lubricant are used wherever heavy power is transmitted. Eight
    sets of such ball bearings are used.

    A special differential arrangement is used to maintain full power on the escapement during
    winding.

    2407M162
    3

    Cases For these Clocks are of the finest cabinet work and are regularly carried in stock in
    selected quarter sawn white oak and distinctively grained gumwood. The backs are made of 5/8”
    5 ply veneer and the doors are double locked to make them dust tight. The style No. 13 and No.
    16 clocks are furnished regularly with brushed aluminum or satin finish white enamel dial and
    Arabic numerals as standard but Roman or Silvered dials with etched or raised bronze numerals
    can be furnished at an increase in cost. Flush type cases can be obtained in place of the surface
    type at extra cost but no roughing in box is furnished.

    2407M162

    You might also like