US571021A - Parallel-jaw pliers - Google Patents

Description

'(N Model.) `Y Y A. SCHATZ.

PARALLEL JAW PLIERS..

No. 571,021. PatentedNoV. 10, 1896.

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`parallel-jaw pliers. section thereof, the jaws being closed. Fig.

1UNITED STA-rss PATENT OFFiCE. l

ADOLF SCHATZ, OF ANEW HAVEN, CONNECTICUT.

SPECIFICATION forming part of Letters Patent No. 571,021-, dated November 10, 1896.

Application tied January 16,1396. serrano. 575.753. (naman.)

To a/ZZ whom t may concern:

Be it known that I, ADOLF SCHATZ, a citizen of the United States, residing in New Haven, county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Parallel-J aw Pliers, of which the following is a specification.

My invention relates to tools for wire and sheet-metal workin g'; and it consists cfa novel construction of parallel-jaw pliers wherein jaws pivoted in handles are guided in parallel motion by blocks r by rollers set in the handles, the splitting or slotting of the inner ends of the jaws being obviated.

My invention is illustrated in the accompanying drawings, wherein- Figure l is an elevation of my improved Fig. 2 is a horizontal 3 is the same View with the jaws open. Fig. 4 is a section showing a modified forin of the guiding devices. Fig. 5 is a similar view showing another methodvof producing the guides for the jaws. Fig. 6 is a transverse section on line 6 6 in Fig. 3. Fig. 7 is a side Y view of one handle, showing the depressions therein for guiding the jaws.

Similar letters of reference indicate corresponding parts in all views.

My improved parallel-jaw pliers consist of handles provided with forked ends crossing each other and pivoted together, and of jaws pivoted between the tines of the handles and sliding with their rear or inner ends between the arcs connecting the tines of the handles and guides secured to the handles.

Handles a and b are preferably made of sheet-iron or of steel. They may, however, also be cast of malleable iron. They may lalso be composed of several parts and of different materials, the forks holding the jaws being then preferably made of steel and suitablyshaped pieces of wood, celluloid, hard rubber, and the like secured to them. This lastmentioned method of construction is especially suitable for tools used in electrical wiring.

To the forked ends of handles d and b are pivoted by bolts h the jaws g and f, respectively, their rear ends being slid into the grip ends of the opposite handles and held there between the rim of the arcs connecting the tines c and d and betweenY guides provided in the handles. These guides may be blocks k and Z, riveted to the inner sides of the handles d b and having their bearing-surfaces curved to reduce the point of contact between them and, consequently, also-the friction. Instead of riveting the separate guide-pieces 7c Z to the sides of the handles d b, the guides may be obtained by depressions in the handles, as shown in Figs and 7. produced will, however, tend to reduce the strength of the tool to some extent, and therefore this method will. be available only for light tools.

In Fig. 4 another modified construction of the guide is shown wherein rollers are employed in place of the guiding-blocks 7c and I.

These rollers r turn on pins 0 set in the handles. The edges j of the jaws glide on these rollers in the same manner as on the guides described above. Jaws f and g iit in between the forks CZ and c and may be solid or hollow, the latter being produced in similar manner as described in my Patent No. 557,615, granted April 7, 1896. The jaws,

The dent n thus provided as usual with roughened grippingsurfaces m at their forward ends, are formed with straight edges j on their rear ends, engaging the guides 7c Z. The backs of the rear ends slide under the arcs between the tines c and CZ and are correspondingly curved, so that they always fill the space between the guiding-blocks and the rim of the handle at all positions. The jaws do not jolt any, being not allowed any loose motion.

The parts of my improved parallel-jaw pliers are put together as follows: Handle b is slid crosswise between the tines of handle @,vand both are pivoted together by bolt e set in their crossing-point. In constructing open-throat pliers the central pivot-bolt e is replaced by the two rivet-s p, as shown in Fig. 6, whereby the adjacent sides of the handles are joined and pivoted separately, and the throat is then free from obstruction. Then the jaws are slid between the tines of the forked handles, their rear ends being iirst pushed in the opening between guides and the arcs connecting the tines and then pivoted.

I claim as my invention and desire to secure by Letters Patent- 1. Parallel-jaw pliers, having jaws, pivoted y propriately curved baeks, and adapted to glide between guides, provided in the handles,

and the edge of the aro, connecting rthe'iines of the forked handles.

2. In parallel-jaw'pl=iers, the combination with hollow handles and with hollow jaws, pivoted to the forked ends of the hollow handles, of guiding-blocks secured in rhehandles f and engaging respectively the corresponding inner edges of the hollow jaws, therebyfguid- 1 ing the jaws in parallel motion.

In parallel-j aw pliersfhaving jaws-round- 1' ed on suitably-curved backs of their inner ends, and these Ainner ends being adapted to glide between the edge of the are, connecting yt'he times l'of the forked handles sand between the guides, provided in the handles, the oombination with the jaws, of hollow handles havin-gsuitable dents produced by depression of the edges of the handles, the edges of the dents guiding fthe jaws in parallel motion.

In witness that I claim the improvements described in the foregoing specification I have signed my name in the presence of two subscribing witnesses,

` ADOLF SCHATZ.

Witniesses:

RICHARD I. ELLIOTT, JOHN P. NORDSTROM.

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