US2356842A

US2356842A - Typewriting machine

Info

Publication number: US2356842A
Application number: US422899A
Authority: US
Inventors: William F Helmond
Original assignee: Underwood Elliott Fisher Co
Current assignee: Underwood Elliott Fisher Co
Priority date: 1941-12-13
Filing date: 1941-12-13
Publication date: 1944-08-29
Anticipated expiration: 1961-08-29

Description

g- 29, 1944- w. F. HELMOND 2,356,842

TYPEWRITING MACHINE Filed Dec. 15, 1941 '9 22 Fig.2 2/

E' 4 i M: UAW E 1223240 BY I . ATTORNEY Patented Aug. 29, 1944 UNITED STATES. PATENT orncs TYPEWRITING monmn William F. llelmond, Clinton, Conn; assignor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application December 13, 1941, Serial No. 422,899

12 Claims. (01. 197- 138) by moldin it thereto or by stretching or forc-- ing it over one of the projecting flanges. The process of so applying the feeding cylinder or jacket to a flanged bushing is cumbersome and expensive; and for this reason, it is one of the objects of the invention to provide a feed roll which, although having a flanged core, can be assembled without difllculty, with utmost-ease and speed, preferably without special tools.

Some provision is usually made to hold the rolls against shifting along its supporting shaft or arbor. For auxiliary feed rolls, that is for rolls which are usually provided at the delivery side of the platen, such provision usually entails an element which frictionally embraces the feedroll shaft and which is situated in an annular, internal groove formed in the bore of the feedroll bushing. The frictional grip such element has upon the shaft is light enough to allow manual shifting of the feed rolls along the shaft to the desired positions. The steps involved in assembling such a roll involves, among a series of operations, the tedious and difiicult task of introducing the frictional embracing element into the internal groove within the bushing. With this in view, it is a further object of the invention to provide a feed roll which is conveniently assemblable and which in particular does not call for the tedious task of inserting said frictional element through the bore of the feed roll into said annular groove.

Another object of the invention is to so construct a feed roll that the assembly of the parts thereof entails the least care and effort and preferably requires no tools.

Other objects and advantages will hereinafter appear.

Referring now to the drawing:

Figure 1 is a plan view showing two auxiliary feed rolls supported on a bail and in operative association witha platen,

Figure 2 is a longitudinal cross-section of the feed roll parts, showing these parts in the process of being assembled upon the feed-roll shaft.

Figure 3 is alongitudinal cross-section through the feed roll in its assembled state upon the feedroll rod, and

Figure 4 is a cross-section of Figure 3 along the lines 4-4.

Referring now to Figure 1, a platen- I0 is re volvably mounted in opposite carriage frame ends H. Upon the front ends of the carriage ends there is pivotally mounted at the points l2 a bail l3 comprising a straight rod l4 and side-arms IS. The rod It is secured by screws Hi to ears I!) being bent oil from the arms l5. Feed rolls I! are carried by the bail rod and bear normally upon the front side of the platen II], but can be lifted off the'platen by swinging the bail upwardly and forwardly about the pivot mounts l2.

Directing particular attention to Figures 3 and 4, the novel feed roll comprises two axiallyadjacent cores or bushings l8 whereupon there is located a hollow feeding cylinder or jacket 2|, preferably of a resiliently pliable material such as a rubber or a cork compound. The jacket 2| preferably embraces'the bushings l8 resiliently, wherefore the. bushings are opposed against separatin by a frictional bond between thejacket and the bushings. The bushings are preferably formed with external teeth 22, and, inasmuch as the feeding cylinder resiliently embraces the bushings, it follows that the teeth 22 will dig'into the bore of the jacket and will thereby form a firm mechanical bond between the bushings and the jacket. The bushings adjoin each other as at 21, Figure 3, and radially-projecting rims or flanges 23 provided upon the far ends of the adjoining bushings l8 serve to locate the jacket upon the bushings. The feed-roll bushings l8 are bored to revolvably fit the rod l4; and so that the roll may be retained to revolve in a certain location on the rod I 4, a friction element 25 in the form of a spring-collar is provided on the rod l4 and flts between the sides of an internal annular groove 26, the latter being formed by enlarging the bores of the bushings l8 where the latter adjoin each other. The spring-collar 25 comprises a split ring which contacts the rod 14 with such resiliency that the feed roll can be adjusted at will to any desired position along the rod, to remain thereat during the operation of the machine. If it is not a requirement that the feed rolls be adjustable, the collar 25 may be integral with the rod I I or permanently fixed thereto.

here or interior of the jacket 2| is preferably smaller than the outside diameter of thebushings I8, so that the jacket bears with resilient pressure on the bushings to hold the bushings and sleeve together, the aforementioned teeth 22 mak-- ing this more positive. As can be observed from the drawing, the teeth 22 on the bushing are so formed that the bushings can be easily forced into the jacket, but are relatively strongly resisted against separation from the jacket. More specifically, the teeth 22 on the opposite bushings are pointing away from each other and, in the assembled state of the roll, tend to bite deeper into the jacket upon attempting to separate the bushings therefrom. Inasmuch as the bushings slip easily into the jacket, there is almost no tendency of the jacket to crowd and enlarge at the middle. Obviously, a two-part bushing of the above form is much more advantageously assemblable into a jacket than the conventional one-part bushing, which latter, when forced into the jacket. tends to crowd and enlarge the jacket at one end, which, of course, is undesirable.

The feed roll may also be assembledwithout the feed-roll rod. A good procedure to that effect is, to place first the collar 25 into the recess of one of the bushings l8, and then to force the bushings oppositely into the jacket. It is obvious from the above, and especially also from Figure 2, that the opposite bushings or cores l8 are introduced into the jacket 2| under maintenance of a concentric relationship with the jacket and that, therefore, the opposite bushings l8 expand the jacket equally, wherefore the feed-roll, upon assembly, has a perfectly balanced form and is ready for use without further attention.

As may be observed from the drawing, the feedroll rod H has several fiat sides 28 upon some, or all, of which there may be scale markings 3|. In this connection, it should be observed that the bushings present a. circularly continuous and smooth bore to the rod It.

It is to be understood that the invention herein shown and described is capable of embodiment in various forms, and that certain features of the invention may be,used without others. For example, the bushings l8 may be cemented to the jacket 2| and the latter may consist of a hard material or may have a bore of hard material.

What is claimed is:

1. A feed-roll, comprising, a feed-roll jacket of resiliently pliable material, and two annular bushings for said jacket adapted to be forced in concentric relation into axially neighboring positions in said jacket from opposite ends of the jacket and having teeth digging into said jacket to hold said bushings and jacket together.

2. A feed-roll, comprising, a feed-roll jacket of resiliently pliable material, and two annular bushings for said jacket adapted to be forced in concentric relation into axially neighboring positions in said jacket from opposite ends of the jacket and having teeth digging into the bore of said jacket, said teeth being so shaped that the bushings are easily forced into the jacket but relatlvely strongly resisted against separation therefrom.

3. In combination with feed-roll locating means adapted to frlctionally grip a feed-roll rod, a feedroll, comprising, a feed-roll jacket of resiliently pliable material, and two annular feed-roll bushings insertable into said jacket in concentric relation therewith, said bushings having teeth for digging into the interior of said jacket to hold said bushings and jacket together, said locating means being adapted to be imprisoned within the feed-roll by inserting said bushings into said jacket from the opposite ends of the jacket, said teeth beingformed to render said bushings easier to insert than to withdraw.

4. In combination with feed-roll locating means adapted to frictionally grip a feed-roll rod, a feed-roll, comprising, a feed-roll jacket of resiliently pliable material and two axially neighboring, annular bushings whereon said jacket is mounted, said bushings being adapted to be forced in concentricity into said jacket and forming in an axial direction therebetween a groove for accommodating said locating means, said bushings having teeth for digging into the interior of said jacket so that said bushings will be held together by the resiliency of said jacket, said locating means being adapted to be imprisoned within the feed-roll by concentric introduction of said bushings into said jacket.

5. A feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two hard coremembers for said jacket, being diametrically larger than the interior of the jacket, and when assembled with the jacket occupying axially neighboring positions therein, said core-members being adapted to be introduced forcibly into the jacket, from opposite ends thereof, under maintenance of a concentric relationship therewith, and each having exterior tooth-means digging into the interior of the jacket for anchorage in the jacket.

6. A feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two hard coremembers for said jacket, being diametrically larger than the interior of the jacket, and when assembled with the jacket occupying axially neighboring positions therein, said core-members being adapted to be introduced forcibly into the jacket, from the opposite ends thereof, under maintenance of a concentric relationship therewith, and each having exterior tooth-means digging into the interior of the jacket, said toothmeans being so shaped that the core-members are easily forced into the jacket but relatively strongly resisted against separation therefrom.

'7. A feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two hard coremembers for said jacket, being diametrically larger than the interior of the jacket, and when assembled with the jacket occupying axially neighboring positions therein, said core-members being adapted to be introduced forcibly into the jacket from opposite ends thereof, under maintenance of a concentric relationship therewith, andeach having an annular flange for engaging one end of the jacket and controlling the extent to which each core-member is insertable into the jacket, said core-members having also tooth-means for digging into the interior of the jacket, for anchorage thereto against axial separation.

8. In combination with a feed-roll rod and feed-roll locating means thereon, a feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two bushings, for the jacket, being diametrically larger than the interior of the jacket, and being adapted to be slid on the rod and introduced forcibly into the jacket with said jacket and locating means therebetween on the rod, each bushing having exterior tooth-means digging into the interior of the jacket for anchorage therein.

9. In combination with feed-roll locating means adapted to frictionally grip a feed-roll rod in a manner to be forcibly shiftable therealong,- a feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two bushings for said jacket, being diametrically larger than the interior of the jacket, and when assembled with the jacket occupying axially neighboring positions therein, said bushings being adapted to be introduced forcibly into the jacket from the opposite ends thereof, under maintenance of a concentric relationship therewith and with said locating means interposed between the bushings, and each bushing having exterior tooth-means digging into the interior of the jacket for anchorage therein against outward movement by axial thrust against said locating means.

10. In combination with feed-roll locating means adapted to be mounted on a feed-roll supporting rod, a feed-roll comprising, a feedroll jacket of resiliently pliable material, and two bushings for said jacket, being diametrically larger than the interior of the jacket, and when assembled with the jacket occupying axially neighboring positions therein, said bushings being adapted to be introduced forcibly into the jacket from the opposite ends thereof, under maintenance of a concentric relationship therewith and with said locating means interposed between the bushings, and each bushing havingexterior tooth-means digging into the interior of the Jacket, said tooth-means being so shaped that the bushings are easily forced into the jacket but relatively strongly resisted against separation therefrom.

11. In combination with feed-roll locating means adapted to be mounted on a feed-roll supporting rod, a feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two bushings for said jacket, being diametrically larger than the interior of the jacket, said bushings being adapted to be introduced forcibly into the jacket from the opposite ends thereof, under maintenance of a concentric relationship therewith, and with said locating means interposed therebetween, the bushings when assembled with the jacket being axially abutting each other and forming together at their juncture an internal, annular, locating-means-accommodating groove, said bushings having tooth-means digging into the interior of the jacket for anchorage in the jacket.

12. In combination with feed-roll locating means adapted to be mounted on a feed roll supporting rod, a feed-roll comprising, a feed-roll jacket of resiliently pliable material, and two bushings for said jacket, being diametrically larger than the interior of the jacket, said bushings being adapted to be introduced forcibly into the jacket from the opposite ends thereof, under maintenance of a concentric relationship therewith, and with saidlocating means interposed therebetween, the bushings when assembled with the jacket being axially abutting each other substantially along a transverse plane, and forming together at their juncture an internal annular groove of definite width for accommodating. said locating means, each of said bushings providing a locating-means-engaging face constituting one side of said groove.

WILLIAM F. HELMOND.