US816637A - Type-writer. - Google Patents

Description

No. 816,637. PATENTED APR. 3, 1906.

W. BAXTER, JR. TYPE WRITER. APPLICATION FILED FEB. 6, 1903.

PATENTED APRrs, 1906.

W. BAXTBR, JR.

TYPE WRITER. APPLICATION FILED Emma, 1903.

witnesses FEE STATES Ar enrich.

S pecificationof Letters Patent.

Patented April 31, 1906.

Application filed February 6,1903. Serial No. 142.223.

To (2 whom it may concern;

Be it known that I, WILLIAM BAXTER, J R. a

.citizen of the United States, residing at.Jer

sey City, in the county of Hudson and State of New Jersey, have invented certain new and useful 1m rovements in Type-VVriters, of which the following is a specification.

My invention relates to arresting-pads for type-writers-that is to say, to the pads upon which the type-bars strike as they return to position of rest after executing the printing stroke. v

In my application filed May 22, 1902, Serial N 0. 108,245, I have described and broadly claimed a type-writer pad having the inherent qualities of yielding under the impact of the return stroke of the type-bar sufficiently to absorb the energ *ofthe stroke, together with non-resiliency, which causes such energy to be dissipated, whereby I am enabled to prevent the objectionable rebounding of the bars, which I have pointed out to be a most fre uent cause of the interference between adjoining bars when successively actuated, that seriously impairs the speed of successful operation.

According to my present invention I produce a pad having the inherent qualities stated by building it up of some highly ductile, inert, or inelastic metal having extreme flexibility, with substantially no resiliency, in very thin formssuch, for instance, as tin in the shape of tin-foil, or lead or copper in very thin sheets, or thin wire-gauze, or other fabric woven of such metals-the pad being built np'of folds, layers, convolutions, or rolls of such material, preferably alternated or otherwise suitably associated with a filling or separating body of'very thin fabric, which will facilitate the bending, indentation, or yielding ofthe layers or folds of the inert metal and prevent their adhesion under impact of the-type-bars.

My present invention will be fully understood upon reference to the accompanying drawings, in which- Figure 1 is a sectional detail view of'my improvedpad, together with parts of a type-.

writer of known construction, with which it is associated for pu oses of illustration. Figs. 2, 3, and 4 are views illustrating progressive stages in one method of forming the pad. Fig. 5 'is a perspective view of a portion of a pad developed by the method of,

folding illustrated in Figs. 2, 3, and 4. Fig. 6 is a view illustrating the effect of impact of the keys on the surface of the pad. Figs. 7, 8, 9, and 10 illustrateprogressive stages in the formation of a pad by a slightly-different method of folding to that shown in Figs. 2 to 5. Fig. 11 is an end view of a pad developed by the method of feeding illustrated in Figs. 7 to 10. Fig. 12 is a perspective view of still another method of folding, a portion of the outer sheath being cut away and the folds'being spread at the exposed end to disclose the separate folds more clearly; and Fig. 13 is an end view of a pad built up by folding a softmetal woven fabric with an intervening cloth fabric or the like.

Referring to Fig. 1, 1 represents the paperroll, 2 the type-bar, which is fulcrunied at 3, and 4- a he -levcr, which actuates the typebar throng its connection at 5 with an intermediate lever 6, that connects with the type-bar at 7.

. 8 represents the tyPe-bar-arresting pad, the construction of which forms the subject matter of my present invention. According to the form shown in Figs. 2 to 55, inclusive, this pad is made up of thin sheets of tin foil and cloth. Two sheets -a and b of tin-foil are preferably used to give sufiicient body to the inert metallic element of the pad without detracting from its flexibility or yielding char-' acter or giving it resiliency, though one thicker sheet might be employed witlrfairly good results, and one sheet of cloth c is'used, which is thin enough to avoid detracting from the necessary inherent qualities of the pad when com leted. The dimension of these sheets, (t eir width,) which is not shown, is assumed to be ap roximately equal 'to' the length of the 'pad to e formed. Good results in, building up the pad may be attained by proceedingas shown in Figs. 3 to 5to wit, by folding the end of the cloth c over the under foil 11, as shown at c", then lay ing the upper foil b about half .over the fold c, a

as shown atb, then doubling the fold c l), as shown at 8, Fig. 3, and again as shown at F), Fig.- 4, if desired, to form a nucleus for the pad and to revent the sheets of metal and cloth from s ipping over one anotherduring their further manipulation, then. by Icons.

tinuous rolling, folding, or wrapping the compound sheet of material around the nucleus until the desired thickness of padfisbuilt' lg-rsucll, for instance, as shown in Fig. 5.

i of the length of the metal foil or foils to forme cloth sheet is cut sufiiciently in excess a complete outer sheath 8 in the finished pad, for which p ose the free end may be stitched or otherwise attached, as shown at 8, to the sheath-forming portion andthen folded lip-3p itself to form and give body to an attac g-seam 8*, which will serve for securing the pad in lace by gripping it b tween two segmenta bars 9 10 in the frame 11..

i made of a single metallic under foil a and a As shown in Figs. 7 to 11, the pad may be cloth oversheet c, the under metallic foil being folded over the cloth, as shown at a, Fi 7, a

I folded lap c of cloth then being laid hal over fold a, Fig. 8, the fold then being doubled, as shown at 8, Fig. 9, with the cloth fold c between adjacent metallic parts, and another double-cloth fold 0 being laid half on the metal and the fold being then doubled a sec- 0nd time, as shown at 8 Fig. 10, 'tocomplete the nucleus, after which the pad is completed by rolling, folding, or wrapping the composite material around the nucleus until the desired thickness of pad is built u in the form of the flattened roll shown in ig. 11.

' In this method the cloth is always [adjacent to the metal, and it is left sufficiently in excess of the length of the latter to permit of wrapping it entirely around the roll to form a sheath 8, stitching it at 8 and forinin from it the attaching-seam 8 as describe with I reference to Fig. 5.

The precise method of building up these pads and the specific material employed are not limited to the methods and material soft-wire fabric, this wire beingunderstood to be lead, highly-annealed copper, or other metal of like physical character, the whole being inclosed in a sheath 8 8 of cloth, leather, or the like.

Whcn the type-bars strike down upon a pad constructed as herein described, the :pad yields with a sluggish or inert action under the impact of the type-bar, so as to prevent springing of the bar or its operating connections, which would cause rebounding and also in a manner to completely absorb the energy of the stroke, and the character of the pad is such that the work thus absorbed will not be stored up. and given out again, because the pad is thoroughly inelastic or non-resilient. The folds or layers of the metal or some or all of them are affected by the stroke so as to be depressed, as shown in Fig. 6, be-

erase-z 2. The work is further taken up by the fact that indenting the pad at one point seeksto stretch the slu gish or inert metal at other points such, i' or instance, as shown beneath the key 2, Fig. 6. The intervening folds of spacing material or cloth maintain the separation and freedom for individual action on the part of the several folds of metal, yet the operation of the cloth on the metal is not such as will detractfrorn the non-resilient character given by the latter.

Having thus described my invention, the following is what I claim as-new therein:

1. In a type-writer, a typabar pad absorbent of the work of the returning typebars, embodying in its structure thin, .exi: ble, and non-resilient metal, yieldingly supported in the body of the pad.

2. A type-Writer pad constructed of thin layers of non-resilient metal in thin flexible form.

' 3. A typc=writer pad constructed. of rionresilient metal in thin form, arranged in layers with intervening material separating the folds or layers. I

4. A yielding non-resilient type-writerpad constructed of thin flexible but non-resilient sheet metal together with a suitable s aeing material, the composite material thus. ormed being arranged in layers.

5. A yielding non-resilient type-writer pad constructed of a composite material made up of metal foil and cloth, such composite material being formed into layers to form a pad of the desired thickness.

6'. A yielding non-resilient type-writer pad constructed of a composite material made up of metal foil and cloth, such composite material being formed into layers to form a pad of the desired thickness, and the cloth bein continued in the fold or roll beyond the meta ang suitably secured to form a sheath for the pa 7. A. yielding non-resilient pad constructed of folds of flexible non-resilient metal, and a suitable sheath surrounding the padso formed.

8. A. ielding non-resilient pad constructed of flexi "le non-resilient metal in thin form,

formed into layers with intervening separating material, and having a sheath surrounding the pad thus formed.

9. A yielding non-resilient typewriter pad formed of folds of a composite material consisting of thin non-resilient sheet metal with a suitable fabric folded'to develop the pad of sufficient dimensions, the fabric being. continued in the fold beyond the metal,.so as to completely surround the pad, and having its end stitched or suitabl secured to 'the sheath-forming portion of t ..a fabric toromplete the closure.

10. A yielding non-resilient type-writer neath the several type-bars represented at ITO pad formed of a composite material consistclosure, and formed into a projecting attachmg of thin non-resilient sheet metal with a ing seam.

suitable fabric folded to develop the pad of The/foregoing specification signed this 31st sufiicient dimensions, the fabric being exday of January, 1903. tended beyond the metal, so as to completely I WILLIAM BAXTER, JR. surround the pad, and having the extension In presence of stitched or suitably secured to the sheath- STEPHEN H. OLIN,

forming portion of the fabric to complete the THOMAS W. PHA'm;

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