US1479468A - Typewriting machine - Google Patents

Description

Jan. 1, I

W. F. HELMOND 4 TYPEWRITING MACHINE File Dec. 8. 1921 Fly hvenfor:

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Patented Jan. 1, 1924.

UNITED STATES ATET OP WILLIAM F. HELMIONI) OE HARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

To aZZ whom it may concern:

Be it known that I, W LLIAM F. HnLMoND,

a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a s ecification.

his invention relates to improved means for guiding lengthy carriages of typewritin machines.

eretofore short carriages of machines, the Underwood typewriting machines, for example, have been provided with lugs or collars, to embrace a rod or bar secured to the main frame of the machine. These collars guided the carriage at the rear. The

front of the carriage is usually provided with a roller to bear on a front rail. To use the guiding collars for a long carriage machine has heretofore been found objectionable, due to excess friction of the collars on the guide-rod. Instead of collars, rollers have been resorted to for this purpose'in long carriage machines. In some'instances this roller construction'ha-s been found objectionable, since the carriage vibratesslightly endwise when arrested. j

An object of the invention is to overcome the above-mentioned objections in connection with long carriage machines. To this end, the long carriage is provided with guide-collars, one at each end ofsaid carriage, and there is provided one anti-friction. roller located near one of the guide-collars,

so asto relieve the one guide-collar of the weight of the carriage. The othercollar bears directly on the guide-rod. Thus, with a collar bearing-directly on the rod at one end of the carriage and an anti-friction roller bearingron the rod at the other end, the carriage feeds withsuflicient freedom, and the objectionable vibration above mentioned is avoided.

Other features and advantages willhereinafter appear. j

In the accompanying drawings,

Figure 1 is a sectional side view of an Underwood typewriter carriage, showing the invention applied thereto.

Figure 2 is a rear view of the carriage, showing the location of the anti-friction roller relatively tothe guide-collar at the right-hand end of the carriage.

Figure 3 is a detail sectional side view,

showing the construction of. the anti-friction roller and the adjustment thereof. I

In a typewriter carriage 10 is revolubly v mounted a platen 11, against which typebars 12 strike. The carriage is fedfrom right to left by the usual escapement mechanism (not shown), 'To guide the carriage there are provided on the main frame 13 afront rail 14 and a rear rail 01- rod 15.

. The carriage is supported on the frontrail by rollers 16. suitably mounted on the front bar 17 of the carriage. The guidingmeans at the rear of the carriage comprises'the rear rail 15, which is embraced by twolugs or collars 18, one'fixed upon each end of the rear bar 20 0f the-carriager It has-been .foundthat, when this construction is used right-hand collar '18, so as to prevent it from- 7 bearing directly on the guide-rod. Since the weight of the carriage is supportedat this end by the roller'21, -the right-hand collar serves merely as a guide. not being a supportfor the carriage weight,.andnot resting upon the top of the rail.

The anti-friction roller 21 is provided with, ball-bearings 22 contained within a V-shaped groove 23 within the roller,and a V-shaped groove 24c formedby two "cones 2i and ,26, which are adjustable relatively to each other to take up looseness: The cones may be. separated from each other by a ring- 27 of copper or other softrwire, which may readilybe squeezedv during the adjustment of the cones 25 and 26 by tightening, a screw' 28 threadedinto a shank 30.

The'roller 21 is provided with 81, and the roller is angularly disposed relatively to the guide-rod 15, so that the engage ing portion of the face 31 bears substantially horizontally on said guide-rod; The shank 3O extends perpendicularly fromthe roller21, and consequently is inclined in opposite direction, thus enabling the roller to be adjusted to bear properly on the guide-rod. To facilitate the adjustment of the roller 21, the shank 30 of said roller is received in a hole 32 in a bracket 33 suitably secured to the rear bar 20 of the carriage, the shank a cone j-fface 30 being held in place when adjusted by a set-screw 34 threaded into a boss 35 of said bracket. I r V l/Vith this arrangement, the construction for guiding a long carriage is considerably simplified,1and permits feeding with the requisite freedom of movement without chattering or endwise vibration at the arrest of the carriage, this improvement being of special value in tabulating, and also advantageous during the letter-feeding movements of the carriage.

Variations may be resorted to within the scope of the invention, and portions of the improvements maybe used without others.

'Having thus described my invention, I claim:

1. In a typewriting machine, the combination of a carriage, and guiding means 7 for said carriage, said guiding means compr sing a rail, carriage-supporting ClQVlCQS' to slide on the top of said rail, and adistant carriagesupporting device to roll on the top of said rail,;said sliding device and said distant rolling device forming the entire support of said carriage upon said rail.

2. In a typewriting machine, the combination of a carriage, and guiding-means for said carriage, said guidingmeans com prising a rod, a plurality of'guide-collars secured to said carriage to embrace said rod,

and a carriage-supporting roller mounted on said carrlage to roll on the top of said rod,

said roller adjacent'to one of said collars,

to relieve it from the weight of the carriage, while leaving the other collar supporting the carriage weight.

3. In a typewriting machine, the combination of a carriage, and supporting and guiding means for said carriage, said supporting and guiding means comprising a rail, two guide-collars secured to said carriage to embrace said rail, a roller mounted on said carriage to roll on said rail, near one collar, and adjustable means co-operative with the roller to relievethe neighboring collar of the weight of the carriage,

the other collar bearing on theftop ofthe rail and constituting a partial support for the weight of the carriage.

4. In a typewriting machine, the combination of a carriage, and supporting and guiding means for said carriage, said supporting and guiding means comprising a rail, two guide-collars secured tosaid carriage to embrace said rail, a roller mounted on said carriage to roll on said rail, near one collar, and adjustable means co-operative with the roller to relieve the neighbor-' ing collar of the weight of the carriage, the

other collar bearing on the top of the rail and constituting a partial support for the 7 .tor said carriage, said guiding means comprising a rail, two guide-collars secured to said carriage to slide on said rail, one of said collars affording a support for the weight of the carriage, a roller mounted on said carriage to roll on said rail, near the other of said collars, said ,rollerbeing inclined and having a beveled face to bear on said rail, the efiective portion of the bear ing face being substantially horizontal, a

bearing shank for said roller, said shank being adjustable to effect an adjustment of said roller relatively to said rail, and'means' to secure said shank in its adjusted position.

.6. In a typewriting machine, the combination of a carriage, and guidingmeans for said carriage, said guiding means comprising a fixed rail, two guide-collars, one

at 'e'ach'end of said carriage to embrace said rail, and a roller mounted on said carriage in close proximity to the right-hand guide-collar to prevent the latter from bear- I ing on-said rail in the traveling movement of said carriage, the left-hand collar co operating with said roller to constitute the entire support of the carriage ,upon said' rail.

7. In a typewriting machine, the bination of a carriage, andguidin'g means for said carriage, said guiding means comprising a fixed rail, two guide-collars, one at each'end of said carriage to embrace said rail, and a roller'mounted onsaid carriage omo in close proximity to the right-hand guide- 7 I collar to prevent the latter from bearin on said rail in the traveling-movement .0? said carriage, the left-hand collar co-operat ing with said roller to constitute the entire support of the carriage upon said raiLtand rollers at the front of the carriage to assist in guiding the latter. V a V WILLIAM F. *HEIJMOND. Witnesses: I

EDWARD AMERMAN, WILLIAM P. SMITH.

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