Swanson, Rockford, Ill. Rockford, Ill. H a 5 ,,object ofthe invention is the. Another object ofithe invention is the provision ,ofaspiral ratchet screw driver having a light -weight construction yet which is relatively strong andcan-withstand hardservice. Another object of the invention is to provide aspiral ratchet screw driver of the above character having telescoping enclosure members wherein the members are so shaped that a relatively large indentation caused by dropping the screw driver or accidental contact with other tools will not interfere with the normal operation of the ratchet mechanism.
Other objects and advantages of the invention will become apparent from the following detailed descr ption taken in connection with the accompanying drawings, in which- Figure lis an elevational view of a spiral ratchet screw driver embodying the present invention; Fig.
In general the screw driver, comprises a tubular member 2 mounted on the rear end of the drive spindle I3 is snugly received in the passageway l2 and serves'to guide the spindle It in the passageway as the spindle moves into and out of the body A ratchet cage 22 iszmounted-on the body I Ito extendforwardly therefrom and in effect form a continuation thereoi'. Ratchet wheels' and 21 are mounted on the spindle l3'in the cage 22 to be accessiblethrough an elongated opening 24 on the cage.
The ratchetwheel '26 i'sformed from bronze alloy material and, as shown in Figs. This configuration of the teethpermits a maximum number of teeth about the flangefil consistent with maximum-tooth strength and a minimum of play between the pawl and the teeth. Helical projections The ratchet wheel 21 is of identical construction to that of the ratchet Wheel 26 and includes a hub portion 42 and a flange portion 43 having teeth 46 see Fig. As best seen in Fig. A thrust bearing supported in the ratchet cage 22 engages the axial face of the hub portion 42 of the ratchet wheel The thrust bearing 5 also is positioned to be engaged by the guide member 2 to limit outward movement or the spindle l3 from the body and define the forward-most position of the drive spindle.
Provision is made for mounting the pawls 34 and 48 so that the latter may be selectively or simultaneously brought into engagement with the teeth of the associated ratchet wheels.
To this end the pawl 48 as best seen in Figs. The bottoms 56 of the slots 54 are inclined as best seen in Fig. With this construction the arms and slots in effect define a pivotal connection or axis about which the pawl 48 may be pivoted so that the tongue 41 is movable between a position in which the tongue is normally received in the space between teeth 46 on the ratchet wheel 21 and a position in which the pawl is inclined relative to the axis of the ratchet wheel so that the tongue is free of the teeth and the ratchet wheel is free to rotate.
A ratchet screwdriver has a mechanism that permits the tool to apply turning force only in one direction, while moving freely in the opposite.
So it can be set to drive or remove screws, without having to move the bit in and out of the screw head at the end of each turn. This makes driving or removing screws and other threaded fasteners quicker and more comfortable. This handy bit ratchet should have a pride of place in every tool box and tool drawer.
The switching lever quickly changes the ratchet mode from clockwise to anticlockwise and vice versa. A longer version of the No. Like the No. Mahogany finished hardwood handle; double spiral locks and turns to the left or right; ratchet adjusted by knurled control sleeve and nut for locking spiral; spiral runs in two chromium plated bronze nuts; quick release chuck; exposed parts chromium plated; shipped with three screwdriver bits.
T-handle allows user to exert greater pressure on the tool. The company manufactured and sold separately a ball-type auxiliary chuck that allowed the use of dimpled drill points, Spring in stained hardwood handle allows for automatic return; single spiral drives screws only; spiral design locks and turns to the right; ratchet adjusted by knurled control sleeve and nut for locking spiral; spiral runs in two bronze nuts; quick release chuck; exposed parts nickel plated; shipped with three screwdriver bits.
Spring in handle allows for automatic return; double spiral design locks and turns to the left or right; ratchet adjusted by knurled control sleeve and nut for locking spiral; quick release chuck. Spring in handle allows for automatic return; double spiral design locks and turns to the left or right; ratchet controlled by shifter button located at base of handle; ratchet controlled by shifter button located at base of handle assembly; quick release chuck.
Spring in handle allows for automatic return; double spiral locks and turns to the left or right; ratchet controlled by shifter button located at base of handle; quick release chuck; shipped with one screwdriver bit. Mahogany finished hardwood handle; barrel is spring loaded for automatic return; double spiral locks and turns to the left or right; ratchet adjusted by knurled control sleeve and nut for locking spiral; spiral runs in two chromium plated bronze nuts; quick release chuck; exposed parts chromium plated; shipped with three screwdriver bits.
The Millers Falls Company used an illustration of the No. I have done so as well. Illustration from catalog. Amber-colored transparent plastic handle stores four bits; spring in handle allows for automatic return; double spiral locks and turns to the left or right; ratchet controlled by shifter button located at base of handle; quick release chuck. Spiral Screwdriver — cocobolo handle; single spiral drives screws only; screw-type chuck; exposed parts nickel plated; shipped with three four-inch screwdriver bits.
Spiral Screwdriver Hardwood handle; single spiral drives screws only; spiral runs in cast metal nut that is replaceable in the event of wear; screw-type chuck; exposed parts nickel plated; shipped with three screwdriver bits.
The only difference between the two model numbers is their length. Above is a rare North Brothers No. This model was made by North Bros. It originally had a total of 4 blade tips in different sizes.
The missing ones are hard to find. Please let us know if you have any extras. Powered by GoDaddy Website Builder. Rare No.
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