US1529652A - Cap structure for writing instruments - Google Patents

Description

March 17, 1925- 1,529,652-

' G. HOFMANN ET AL CAP STRUCTURE FOR WRITING INSTRUMENTS 1 Original Filed Feb. 2, 1922 Invenfqf'si u/Maw Hie/r LAT-rim ey J.

& Patented Mar. 17, 1925.

UNITED STATES PATENT OFFICE.

GEORGE HOFMANN AND ROBERT G. SCHROEDER, OF CHICAGO, ILLINOIS, ASBIGNOM TO RALPH BAJB/D, TRUSTEE, OF CHICAGO, ILLINOIS CAP STRUCTURE FOR WRITING INSTRUMENTS,

Original application filed February 2, 1922, Serial February 8, 1923.

To all whom it may comm:

Be it known that we, GEORGE Hormmr and ROBERT G. Sonnonnna, citizens of the United States, residing at Chicago, in the 6 county of Cook and State of Illinois, have made certain new and useful Improvements in Gap Structures for Writing Instruments, of which the following is a specification.

Our invention has for its general object to provide a simple, compact and desirable cap-structure particularly designed for use in connection with a combined fountain pen and lead-feeding pencil, such as the combined instrument shown in our pending aplication for Letters Patent of the United tates Serial No. 533,676, filed February 2, .1922, of which application this is'a division.

In the cap-structure shown, we make provision for cap-cooperation with the penequipped end of a fountain pen structure to afford protection to the pen, and additionally provide, in concealment within the cap, but for ready accessibility when needed, reservoir spaces for the reception of spare leads for the encil structure, and an eraser; and with thls construction we preferably make provision for effective retention of a holding clip exteriorly mounted on the'cap. A further object of our invention is to pro- ::0 vide a construction that may easily and cheapl be manufactured and assembled, and w ereof the parts that are subjected to wear or deterioration may easily be replaced and which when in use in connection with either end structure of the combined instrument, doesnot interfere with proper balance or facile handling of the device.

To these ends, and the attainment of other objects which will become apparent -1 to those skilled in the art from the following description, ourinvention consists in the features of construction and arrangements of parts hereinafter set forth and claimed.

In the drawings Fig. 1 shows a combined fountain-pen and lead pencil equipped with a cap embodying our invention, parts of the construction bein brokenv away, the position of the cap w en the fountain pen end of the instrument is in use being indicated by dotted lines; Fig. 2 is a vertical section through the cap structure; Fig. 3 is a horizonta section on line 33 of Fig. 2. In the drawings 10 indicates a barrel,

pen-point 13 and at its ot er end a No. 533,676. Divided and this application filed Serial No. 617,698.

with either end of which the cap 12 may cooperate, said barrel havin at one end a en pencil mechanism 14, of suitable renewa lelead construction. The barrel 10 may have near its pen-equipped end a screw-threaded portion 13 for cooperation with the cap, and near its pencil-equipped end a taper portion 14 on which the cap may be frictionally seated by direct thrust. The cap 12 is formed with a rubber shell 41 open at both ends, the lower end having .internal provision of screw-threads 413 to engage the threads 13.of the fountain pen barrel, and below such threads 413 a taper portion 414 for engaging the taper portion 14 of the barrel 10. Within the shell 41 a shoulder 43 is formed, beyond the range of interference with the ta ered tip mechanism of the lead pencil, an preferably in osition to coact with the pen-equipped en of the barrel 10 for sealing purposes, and space above said shoulder 43 is utilized as follows:

An inner sleeve 44, preferably of rubber, is inserted into the upper open end of the cap 12 to. make contact with the upper surface of the shoulder 43 and to leave a leadreceptive space between the sleeve and the ca wall, such space being preferably divi ed into compartments by ribs 45 on the exterior of the sleeve as best shown in Fig. 3. The sleeve len h should be slightly greater than that o a replacement lead for the pencil mechanism, and in the open end of t e sleeve-a collar 47 is inserted, having a flange 48 partly to overlie the leadreceptive spaces 46. An eraser 49, of rub her or the like, is'preferably carried in this flan ecl collar, the eraser shown being of mus room shape, with a stem portion extending into the collar and a broad head neatly overlying the collar-flange, so as to give an ample erasing surface and one that, adjacent its marginal edges, is firmly supported by the collar flange. The rubber sleeve 44 may have its ribs tightly fitted into the cap body against accidental displace ment, but the eraser-carrying collar should be readily removable from said sleeve to give free access to the lead 2 in the reservoircompartment. A thin metal cap 50, slipfitted on a slightly reduced portion 50"of the rubber shell covers the eraser and gives an ornamental finish to the ca but is readily I preferably takm removable to give access to the internal parts.

A holding clip 51 1s preferably provided, form as a ball-ended spring 52 tonne between its ends into a suitable spring-bow 53 and having its. narrow end 54 passed throu h an aperture in the side of the cap, and t ence extended as at 55 alon the inside of the cap in a groove 56 formed to receive it in one of the ribs of the magazine-sleeve. By snugly fitting the spring-portion 55 in such a groove of ribs 45, the parts serve mutually to anchor each other and the spring clip is given a very strong and effective bearirfg without the use of rivets or other usual fastening devices. L c While we have herein shown and described a single embodiment of our invention in simple, compact form particularly designed for operative excellence and manufacturing economy, itwill be apparent that changes in detail may be made without departure from the spirit of our invention within the scope of the appended claims.

/Ve claim:

1. A cap for a writing instrument of the character described, having an external Wall, a sleeve interiorly spaced from said wallto provide renewal-lead spaces, removable. collar having a fla'nge or partly overlying said spaces, andan end closure for the cap.

QJAQca structure of the character described having, in its normally-closed end portion, separated inner and outer walls al fording a replacement-lead space, an

eraser holder detachably engaging the inner wall and partly covering the end of said renewal lead space, an eraser in said holder, and a detachable covering for said eraser engaging, and normally closing the end of,

bined with a cap or end piece slip-engaging the -outer wall of the shell, substantially as described. 4 J v 5. In a cap structure of the character described, an outer shell, a removable cap for one end of said shell, and an'eraser structure within said; shell normally concealed by the cap, said eraser structure comprising a flanged sleeve and a mush-room shaped eraser carried thereby.

6. A cap structure 6f scribed having a shell, a ribbed sleeve with in sa d shell providing renewal-lead spaces,

a'holding clip having an end portion passing through said shell and engaged by one of the said r bs, and a closure for the leadreceptive spaces.

GEORGE HOFMANN.

RUBERT o. sc RoEDEn

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