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Mechanical Model Kits -
Combined Drive


SLIDER-CRANK MECHANISM
4Z4-018
         Type:  Combined Drives

Drive illustrates basic method of converting rotation into reciprocation. Crank-operated drive shaft pin-connected to connecting rod, which drives slider. Study of displacements in mechanism facilitated by angular and linear scales mounted on unit. Price: $41.82

 

MECHANICAL DIFFERENTIAL
4Z4-023
           Type:   Comined Drives

Device illustrates action of a bevel-gear differential. Input crank drives arm on intermediate member (spider) engaging two output members, the average of the speeds of which is controlled. Useful in demonstrating principles of differential action, such as occurs in automobile differentials. Price: $151.58

 

LATHE DRIVE WITH LEAD SCREW
4Z4-024
                 Type:   Combined Drives

Drive illustrates principle of the drive of a metal-cutting lathe. Included are change gears, lead screw, cylindrical work piece and pointer on compound rest simulating cutting tool. Useful in studying relative motions and mechanical arrangements of a basic metal-cutting machine. Price: $119.20

 

SHAPER MECHANISM
4Z4-025
   Type: Comined Drive

Drive illustrates quick-return motion and work-feed arrangement used in shapers. Crank drives eccentric, slotted link connected to reciprocating output motion (of shaping tool). Second drive involves crank-and-rocker, ratchet clutch and lead screw in controlling advance of work piece. Useful in studying basic arrangements and speed-relationships in shaper drives. Price: $145.00

 

INCLINED-PLANE DRIVE
4Z4-026
Type:  Combined Drive

Drive illustrates conversion of translatory motion into perpendicular translatory motion by means of an inclined plane or wedge. Geared, crank-operated drive shaft actuated wedge mounted on horizontal dovetail slide. Wedge engages rollers on output member moving on vertical dovetail slide at reduced speed depending on wedge angle. Linear scale on output motion useful in studying speed relationships involved. Price: $99.31

 

VARIABLE-SPEED FRICTION DRIVE
4Z4-044
                     Type:   Combined Drive

Drive illustrates principle of an infinitely-variable speed transmission. Crank-operated input shaft with keyed roller, slideably mounted on shaft, drives disc on a perpendicular output shaft through frictional contact. Control of roller position obtained by screw moving roller along keyway, thereby adjusting speed ratio. Price: $73.17

 

RACK AND GEAR JACK MECHANISM
4Z4-050
                          Type:   Combined Drive

Mechanism illustrates the mechanical advantage obtained by the gear ratio involved. Moderate loads placed on the top of the jack platform can easily be lifted by the mechanism. A ratchet and pawl on the input shaft prevents the jack from descending under the load. Price: $88.86

 

SWINGING BLOCK LINKAGE
4Z4-057
      
Type:  Combined Drive

Model is used to illustrate the basic concept of the quick-return mechanism. It is a basic four-bar linkage, similar to the Slider-Crank Mechanism of Kit #18 with the difference being that the slide bar is mounted on a plate free to rotate. Adjustment of the position of the input shaft permits variation in the stroke. Price: $46.00

 

BAND-BRAKE AND FLYWHEEL
4Z4-058
      
     Type:   Combined Drive

The flywheel driven through a single-stage step-up gear system is connected to the shaft through a friction clutch. When operated, the flywheel is set into motion and then the band-brake applied by means of the operating lever. Model is useful in the study of braking concepts. Price: $85.71

 

COMPACT TOOL KIT 4Z4-0ST

Five piece kit consisting of two screw drives and three wrenches. Price: $12.95

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