US1644740A

US1644740A - Magazine pencil

Info

Publication number: US1644740A
Application number: US115685A
Authority: US
Inventors: Morlock Heinrich
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-05-04
Filing date: 1926-06-12
Publication date: 1927-10-11
Anticipated expiration: 1944-10-11

Description

H. MoRLocK MAGAZINE PENCIL Filed June 12, 1926 Patentes oct. 1,1, 1927.

HEINRICH MonLocx, or PFORZHEIM, GERMANY.

MAGAZINE PENCIL.

Application led .Tune 1-2, 1926, Serial No. 115,685, and in Germany May 4, 1925.

The present invention relates to a leadpencil of the type in which a movable magazine tube carrying a number of sticks ot lead, adapted to be automatically fed, one at the time, to a' reciprocating' lead carrying member is -pressedforwardly vby hand and returned by a spring, to impart aV step by step forward feed tov the lead.

In describing the invention in detail, reference will be had to the accompanying drawing, forming part of the specification, and wherein like characters denote corresponding parts in the several views, in lwhich:

Fig. l shows a central vertical section through the lead pencil in the position for use,

Fig. 2 shows a corresponding view of the pencll the lead carrying member, which is shtwn in elevation, being pushed forward,

Fig. 3 is a similar view to Fig. 2, but

carrying member.

The interior mechanism of the pencil consists essentially of a stationary sleeve a, a magazine-tube 5 sliding therein and carrying va, tubular 'lead propeller e, a coiled spring a? disposed between a ring 7L fixed in the sleeve a and the lower end of the magazine-tube I), as well as a tube or guide f for the lead with a hat-shaped spreading member z' for the lead propeller e, loosely mounted thereon. The lower end of the stationary sleeve a is bentinwardly to form a shoulder i a. .The lower part of the tubular lead propeller e is split, forming spring arms for engaging and gripping the lead.

The whole mechanism is held in known lmanner in a shell 0r holder 7c which terminates at its lower end in a. point or tip g. The movable magazine-tube b, which as well as for operating the mechanism at thesame time serves as a magazine for spare leads is normally retained by the spring' d inv the sition indicated in Fig. 1.. rlhe tubular with a somewhat modied form of the lead,4

. ead propeller e situated on the lower end ofl the magazine-tube b serves for engaging and moving the leads c which fall into it from the magazine-tube b. These are caught in the restricted part e of the propeller and from there are advanced through the.' guide tube f into the tip g in the following manner.

magazine-tube b the widened part ef of the By the pressure of the spring d upon theA propeller is drawn into the ring It fixed in sleeve a, which has the result `that the part c of the propeller clamps the lead tightly. If thel magazine-tubeb is pressed by the linger into the holder, and therewith the propeller portion e out of the ring L then rst the strong clamping action of the propeller A arms is relaxed and the lead, which thereupon is only held by the mere resilience of the latter, is pushed forward a certain-distance through the guide f and tip g. Upon pressing the magazine-tube' b further into the holder, the cupped end of the propeller e engages over the hat-shaped member 'z' (see 70 -Fig. 2) on the guide tube f, whereby the propcller arms are spread apart and so release the lead c. The lead is now held in its advanced position 'by the clamping action of the tip g, so that if the pressure on the i5 magazine-tube b is released and this is returned by the spring d, the propeller e does not take the lead with it. Unly when the spreading member i strikes with its rim against' the shoulder a ofV the stationary S0 sleeve a, thereby being disengaged from the propeller e, the propeller armsagain grip the lead which is then so firmly clamped by the withdrawal of the propeller portion e into the ring 7L that in writing itdoes not S5 give away. i

By the movement of the magazine-tube in the holder and the resultant alternate o en.- ing and closing of the propeller as 1t is moved to and iro, the lead is intermittently advanced a short distance.

Whilst in the. practical 'embodiment according to Figs. l and 2the propeller e has a special enlargement at its central portion for withdrawal into the clamping ring It, in the modified construction shown in Fig. 3 the cupped end or head of the propeller is adapted to be drawn into a ring It, which in this case is somewhat lower in the stationary sleeve a. 'A specialenlargement of the pro- 10U peller is thereby obviated and moreover a longer length of spring al is obtained, which is advantageous for smoother working of the tube-.

Having now particularly described and ascertained the nature of my said invention,v and in what manner the same is to be performed, declare that what I claim is:

A. magazine pencil of thetype described, comprising a movable tube the upper part of which is enlarged to serve as magazine for the leads, whilst the lower end is pro- `having an enlargement on the split portion and serving as lead propeller when the magazine tube is pressed into the holder', a-

ring or annular member ixed in the stationary sleeve of the pencil, the opening in which is smaller than the outside diameter of the said enlarged portion of the split tube or propeller a coil spring located between l" the ring and the base of the magazine portion of the movable tube to hold the propeller in the upper position thereby forcing the enlarged portion of the latter into the ring,V

a cap or hat-shaped spreading member for the lead propeller to release the lead after the forward movement and a shoulder to disenga-ge the spreading member from the lead propeller, substantially as described and for the purpose set forth.

- HEENRICH MORLOCK.