US1437520A - Typewriting machine - Google Patents

Description

J. B. HOLDEN.

TYPEWRITING MACHINE.

APPLICATION FILED DEC.19, 1921.

Patented Dec. 5, 192".

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Patented Dec. 5, 1922.

warren STATES PATENT OFFICE.

JOSEPH B. HOLDEN, F SYRACUSE, NEW YORK, ASSIGNOR TO REMINGTON TYPE- WRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed December 19, 1921. Serial No. 523,435.

To all whom, it may concern:

Be it known that I, JOSEPH B. HOLDEN, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

My invention relates to typewriting and like machines, and more particularly to adjustably mounted slides for margin and line lock stocks or trips.

The main object of my invention, generally stated, is to provide simple, light, inexpensive and efficient means of the character specified, and in which the slides may be readily released. and re-adjusted without liability of catching or binding on their supporting rod or rack bar.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts, and combinations of devices set forth in the following specification and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters indicate corresponding parts in the different views,

Figure 1 is an enlarged detail fragmentary bottom plan view of the rack bar and the slides carried thereby.

Figure 2 is an enlarged detail fragmentary sectional view of a portion of the same showing a slide released from the rack bar for adjustment thereon, the section being taken on the line 2-2 of Figure 4 and looking in the direction of the arrow at said line.

Figure 3 is a transverse sectional view taken on the line 3-3 of Figure 1 and looking in the direction of the arrow at said line.

Figure 4: is an edge view of the parts represented at the left-hand side of Figure 1 as seen when viewed from the direction of the arrow a in said figure.

The present invention is an improvement on the construction disclosed in my Patent No. 1,381,994, dated June 21, 1921, and like the construction therein shown is designed more particularly for a small, light machine like the Remington Portable but may be employed wherever found available in other styles of typewriting or like machines.

In the construction disclosed in In said patent each of the slides of the margm and line lock stops or trips carries a pin which is intended to ride over the ends of the rack teeth and fulcrum thereon during the swinging movement of each slide to engage it with or disengage it from the rack teeth. It has been found in practice that these pins catch on the corners of the rack teeth and interfere with the free movements of the slides along the rack bar.

One of the main objects of the present inventlon is to overcome this difliculty and yet retain the other advantages of the construction 1n question.

The rack bar 1, as shown in the present instance, is formed with square teeth having fiat end faces 2 and intermediate spaces 2 The rack bar is suitably mounted, as for example by being attached at its ends by screws 3 to sheet metal supporting arms 4: on the carnage, as in the construction disclosed in my patent hereinbefore referred to.

Mounted on the right-hand end portion of the rack bar 1, as the parts are shown in Fig. 1, is the slide of a margin stop designated as a whole by the reference numeral 5, whereas the slide for the line lock trip and stop, designated as a whole by the reference numeral 6, is mounted at the left-hand end portion of the rack bar, as the parts appear in this view. So far as concerns the construction of the body portions of the slides and the manner of mounting the same on the rack bar, one is the same as the other, the two merely differing in the stop projections or trips that are carried thereby. Therefore, the following description may be understood to apply to either slide; the same reference numerals being used for both.

The body portion of each slide is formed from a single piece of sheet metal providing two parallel side plates 7 spaced apart to receivethe rack bar 1 between them and united at one end by an integral connecting portion 8. This connecting portion constitutes an engaging or looking member adapted to move into and out of the interdental spaces 2 of the rack bar and lock the slide in its adjusted position, as will hereinafter more clearly appear.

shouldered rivets 9, 10 and 11 unite the side plates 7 and maintain them properl spaced apart. The rivet 9 passes throug a washer 12 knurled on its periphery, as at 13, and forming a finger piece by which the slide may be turned to release it from the 1.10

rack bar and then adjusted along the same.

A wire s ring 14 is coiled around the rivet 10 and ears at one end against washer 12 and at its opposite end against the smooth edge of the rack bar opposite that which carries the teeth. The force of this spring is exerted to turn the slide and hold the engaging portion 8 thereof in a space 2 of the rack bar, as shown in Fig. 1. The rivet 11 extends freely through an opening in a shoe or contact device 15 received between the side plates 7 and having a contact face 16 which bears against the fiat end faces 2 of the teeth on the rack bar and spans a plurality of such teeth. In the present instance the face 16 spans three rack teeth and presents a comparatively long surface that bears against and is adapted to slide freely along the rack bar and over the ends of the teeth when the slide is released therefrom.

The construction is such that the pin or rivet 11 turning in the opening in the shoe 15 enables the slide to fulcrum or pivot on the latter and turn thereon from the Figure 1 to the Figure 2 position or vice versa, while the force of the spring 14 is exerted to keep the face 16 of the shoe in contact with the ends of rack teeth at all times.

When it is desired to re-adjust a slide, pressure is exerted on the finger piece 12 towards the rack bar, thus turning the slide independently of the shoe 15 on the pivotal connection 11 which unites the two, and while the shoe is held against pivotal movement against the rack teeth.' This results in tipping the slide from the position shown in Fig. 1 to that indicated in Fig. 2, thereby releasing the catch or engaging member 8 from the rack and leaving the slide free to be adjusted along the latter.

It will be understood that by reason of the long contact face 16 on the shoe, which does not change its angular relation to the rack teeth during the pivotal movement of the slide, the shoe cannot catch on the teeth or the corners thereof or interfere with theadjustment of the slide along the rack bar.

In the construction of my prior patent, hereinbefore referred to, the rivet 11 or one somewhat like it, fulcrumed directly on-the rack teeth, caught on the corners of the teeth and interfered with the adjustment of the slide along the rack bar. It was to overcome this disadvantage and obtain an easy moving slide without detracting from the other advantages of my previous device that the present construction was devised. v

Suitable contacts, trips or stops may be employed on the slides. As shown in the present instance, the slide of the margin stop 5 carries a sheet metal stop 17 bent up from a plate 18 secured by rivets l0 and 11 to one of the side plates 7.

The slide 6 for the line lock and stop carries a stop 19 bent from a plate 20 secured to a side plate 7 by the rivets l0 and 11, and said rivet 10 is extended to form a line lock trip pin 21.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting or like machine, the combination of a rack, and a trip or stop carrying slide embracing said rack and adapted to be adjusted along the same and having means for engaging the rack teeth to hold the slide in its adjusted position and also having a loosely connected shoe with a contact face that bears against and. spans a plurality of the teeth of said rack.

2. In a typewriting or like machine, the combination of a rack, a shoe having a contact face that bears on and spans a plurality of teeth of said rack, and a slide which passes around said rack and is pivoted to said shoe and has an engaging portion that engages between the teeth of said rack, a movement of the slide around its pivotal connection with the shoe carrying said engaging portion into and out of engagement between the rack teeth.

3. In a typewriting or like machine, the

combination of a rack, a shoe having a contact face that bears on and spans a plurality of teeth of said rack and is adapted to slide over the same, a trip or stop carrying slide pivoted to said shoe and having an engaging member that is thrown into and out of engagement with the teeth of the rack by a pivotal movement of the slide on said shoe, and a spring which tends to turn the slide in one direction on its pivotal connection with the shoe and into engagement with the rack teeth.

4. In a typewriting or like machine, the combination of a rack, a trip or stop carrying slide having two parallel side plates that embrace and coact with said rack and an engaging member adapted to engage the teeth thereof, and a shoe received between the side plates of the slide and to which the slide is pivoted, said shoe bearing against and spanning a plurality of the teeth of the rack, whereby the slide may receive a pivotal movement on the shoe into and out of engagement with the rack teeth while the shoe is held against pivotal movement but is free to move over the rack teeth in unison with the slide when the 'ing them spaced apart, one of said devices carrying a contact shoe that spans a plurality of teeth of the rack and to which said slide is fulcrumed to enable the slide to swing independently. thereof and carry the locking tooth into and out of engagement with the rack teeth.

6. In a typewriting or like machine, the combination of a rack, a sheet metal slide bent to form two parallel side plates that embrace the rack and to form by an integral connection between said plates a locking tooth that is adapted to engage between teeth on the rack, devices for securing said plates together and for maintaining them spaced apart, one of said devices carrying a contact shoe that spans a plurality of teeth of the rack and to which said slide is fulcrumed to enable the, slide to swing independently thereof and carry the locking tooth into and out of engagement with pivoted trip or stop carrying slide mounted a on said bar and carrying saidshoe.

Signed at Syracuse, in the county of Onondaga, and State of New York, this 16 day of December A. D. 1921.

JOSEPH B. HOLDEN.

Witnesses:

HERBEl KT E. BUND'OWATER, RAnPn: B. SMITH.

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