US292313A

US292313A - Lead-holder for pencils

Info

Publication number: US292313A
Authority: US
Publication date: 1884-01-22
Anticipated expiration: 1901-01-22

Description

(No Model.)

J. HOLLAND.

d'LEAD HOLDER PORPBNC'ILS. y No.. 292,313. 1 Patente.d Ja11`.-22, 1884.

. N. PETERS Pnglwwhngnpiur. wnhinmun. uc.

UNITED STATES PATENT OFFICE.

VJOHN HOLLAND, OroINo-INNATI, OHIO.

LEAD-HOLDER FOR PENciLs.

SPECIFICATION forming part of Letters Patent No. 292,313, dated .Tanuary 22, 1884. .L Application filed March 18, 1882. (No model.)

' hold the lead or crayon in pencils from slipthe lowerrend of the tube before it is slotted,

ping back withinA the tube when pressed upon bythe act of writing, without danger of break- .ing the lead.

Lead-tubes now in common use are usually slotted at the lower end to form elastic clamping-fingers, which ngers are closed upon the lead,`near its point end by a sleeve or tube which moves longitudinally over the fingers. These fingers are either smooth upon the inside, or terminate at their ends in sharp inward projections or claws. The first kind soon become so smooth that the lead slips back when borne upon in the act of writing, and the second frequently breaks the lead when the clamping-sleeve is tightened up, and when tightened up carefully the lead often breaks in use, when writing with the pencil inclined. I overcome both of these objections by making ayine screw-thread within to form the clamping-fingers.

In the accompanying drawings, Figure l is an elevationof the lead-tube, detached from the case, and having the clamping-sleeve in position. Fig. 2 is a'central vertical section of the lower part of the case and the lower end of. the slotted leadtube. The upper portion of .the case and the lead-tube are shown iii elevation. Fig. 3 is a longitudinal central section of the lower `part of the lead-tube, greatly enlarged.v In this view, as in Fig. 2, the clamping-sleeve is removed. The leadtube A is provided with three" collars, b, c, and d.

To the collars c and b is secured a tube, B, and upon this is secured the outer nish of the case, as follows: The perforated lower cap, O, is soldered or other-wise suitably'secured upon the lower end Qf said tube B. The outer shell, D, is slipped over tube Buntil it strikes the lower cap, leaving the upper end of said tube B exposed to receive the cap E, which is slipped down against the upper vend of tube serew-threaded upon the inside, be serrated or roughened to accomplish the same result;

but the screw-thread is much better, because by this means a uniformly-even roughene'd surface can be made within the lower end of the tube at-comparatively small expense; and,

Aas these pencils are designed to take the place of the common lead-pencil, they must be made cheaply to insure their int-roduction into general use.

I am aware that it is old toprovde a pencil-case for holding ordinary lead-pencils with a sliding ring, to which aresecured spring` clamps having their holding-surfaces serrated, and having their shanks bent to approach each other, then jut outwardly'and downwardly at their free ends, so that a ring-slide may be moved upon said shanks to cause the free ends of the clamps to grasp or release a pencil; and I ain also aware that it is old to provide the lead-holding tube of a pencil with an interior thread and a single slot. I therefore do not claim either of these devices.v

I claim as my inventionl. As a new article of manufacture, a leadtube for pencils consisting, substantially as before set forth, of a tube provided at one end with internal or female threads and two or more longitudinal slots to form threaded Iingersf I 2. The combination, with the lead-tube provided at one end with internal threads and two or more longitudinal slots, of a clampingsleeve adapted to be adjusted upon the slotted end of the tube to press the threaded :lingers upon a lead, substantially as described.

JOHN HOLLAND.

Witnesses:

M. W. OLIVER, .GEO.'.I. MURRAY.