US1114417A - Spring-cushion type-writer foot. - Google Patents

Description

G. M. TURTON.

SPRING CUSHION TYPE WRITER FOOT.

APPLICATION FILED DEO.11, 1911.

Patented Oct. 20, 1914.

wi/tueooeo CHARLES H. TURTON, OF NASHVILLE, TENNESSEE.

SPRING-CUSHION rare-warren FOOT.

Specification of Letters Iatent.

Patented Oct. 20, 1914.

Application filed December 11, 1911. Serial No. 664,983.

To all whom it may concern:

Be it known that I, CHARLES M. TURTON, citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Spring- Cushion T ype-VVriter Feet, of which the following is a specification.

The present invention relates to certain new and useful improvements in shock absorbing and sound deadenin devices for typewriters and simllar machines, the primary object of the invention beinglto provide a device of this character ich embodies novel features of construction whereby the noise usually incident to the operation of typewriters and the like may be reduced to a minimum, and whereby the shocks and vibrations usually incident to the 'oporation of the machine will be completelyabsorbed so as to greatly reduce the wear upon the parts and prolong the life of the machine.

A further object of the invention is to provide a cushion foot for typewriters, which is comparatively simple and inexpensive in its construction, which can be readily applied to a typewriter or similar machine, and which will operate in an effective manner both to absorb the jars and vibrations and to prevent the sound from being transmitted to the base upon which the machine is supported.

With these and other objects in view, the invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawing, in

which Figure 1 is a side elevation of a portion of atypewriter having the cushion feet applied thereto, a portion of one of thetypewriter feet being broken away and shown in section. Fig. 2 is a vertical sectional view through one of the cushion feet. Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 2, a portion of the retaining lip projecting from the upper end of the rubber cap being removed. Fig. 4: is a vertical sectional view through a modified form of the cushion feet, and Fig. 5 is a similar view showing a still further modification. A

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

For the purpose of illustration, the inventron is shown as applied to a typewriter 1 which is formed with the usual feet 2 and i 4 rests upon a base 3. The cushion feet compr1s1n the present invention are in the nature o attachments adapted to be applied to the feet 2-of the typewriter.

Specifically describing the embodiment of the invention illustrated by the first three figures of the drawing, the numeral 4 designates a vertical stein or post 4 which has the upper end thereof threaded at 5 so as to be screwed into the threaded opening of a typewriter foot. -A plate 6 which fits against the lower end of the typewriter foot is rigidly applied to the post 4; at an intermediate point in the length thereof. A second plate 7 is formed with an opening through which the lower end of the post a projects. A

tubular bushing '8 is applied to the lower plate 7 and fitted within the opening thereof, the said tubular bushing loosely receiving the post 4; which is adapted to slide freely therein. Tension means, such. as the coil sprin 9 is interposed between the lower plate and the upper plate 6, the said spring surrounding the post 4 and having the ends thereof engaged by flanges 10 upon the adjacent faces of the plates 6 and 7. These flanges may be formed in any suitable manner, although in the present instance they are illustrated as formed of dished washers which are applied to the respective plates and have the inner edges thereof engaged by the returned edges 11 of the post receiving openi-n s in the plates 6 and 7. The spring 9 thus orms a connection between the plates 6 and-7 and prevents the plate 7 and bushing 8 from slipping over the end of the post 2nd becoming accidentally disengaged thererom. Y

A pad 12 of sponge rubber or other soft resilient material is applied to the lower face of the late 7 and retained in position by means 0 a cap 13 of rubber or similar material. This cap 13 fits around the botparts securely in position. The pad 12 is formed with an'opening receiving the tubular bushing 8, thereby enabling the bashing to project downwardly below the plate 7. If desirable, the'cap 13 may also be formed with an opening registering with the bushing 8, although this is not essential to the invention.

When using the embodiment of the invention illustrated by Figs. 1, 2 and 3, the threaded upper ends 5 of the posts 4 are screwed into the threaded openings of the typewriter feet 2, as indicated by Fig. 1.

- The post 4 plays freely up and down in the bushing 8, and the spring 9 serves to absorb the heavy shocks and jars incident tothe operation of the typewriter. The soft pad 12 of sponge rubber orother nonsound con ducting material, together with the rubber cap 13, also coiiperate with the spring 9 to absorb the shocks and jars. The pad 12, however, performs the additional function of preventing the sound from being trans mitted to the base 3, since it is formed of material which will not conduct the sound vibrations. It will thus be obvious that the device will absorb all jars and vibrations and will cause the machine to operate substantially the same as though suspended in mid air, since the sound vibrations are all absorbed by the soft porous pad 12 and thereby prevented from being transmitted to the base.

A modification is shown in Fig. 4, in which the numeral 15 designates avertical post which has a plate 16 rigidly applied to the lower end thereof and slides freely through an upper plate 17. Tension means such as a coil spring 18 is interposed between the upper plate 17 and the lower plate 16, the opposite ends of the spring being engaged by flanges 19 similar to the spring engaging flanges previously described. A cap 20 of rubber or similar material is applied tothe upper plate 17, the said cap being formed with a tubular nipple 21 which receives the upper end of the post 18 and is adapted to be fitted within the opening of a typewriter foot. This tubular nipple 21 has a tubular bushing 22 fitted in the interior thereof, the said tubular bushing forming a hearing within which the post 15 slides freely. The edges of the rubber cap 20 are formed with an annular lip 23 which fits around the edges of the upper plate 17 so as to hold the rubber cap securely in engagement with the said plate. The lower plate 16 has a pad 24 of sponge rubber or other soft resilient material applied to the lower face thereof, the said pad being retained in position by a rubber cap 25 which fits around the bottom and sides of the pad and is providedat the top thereof with an annular lip 26 engaging the edge of the plate 16. This modified form of the cushion foot operates substantially the same as the construction shown in Fig. 2, the shocks and being absorbed by the combined action of the sprin 18, the rubber caps and the soft pad 24:, wliile the said sot't pad 24 also performs the additional function of preventing the transmission of sound vibrations to the base.

A further'slight modification is shown in Fi 5, the said modification being substantia ly the same as that shown in Fig. 4, with the exception that an upper pad 27 of softresilient material such as sponge rubber or felt is interposed between the upper face of the upper plate 17 and the upper rubber cap 20. With this construction we have the two layers 24: and 27 of nonsound conducting material which serve the double function of absorbing all sound vibrations and of cooperating with the spring and rubber caps to take up the heavier shocks and jars.

While my invention has. been designed especially for typewriters, it will be understood that it may be used with equal facility in connection with other machines presenting the same conditions as a typewriter with respect to the manner of vibration and noise when in use.

Having thus described the invention, what I claim as new and desire to secure by Lettors Patent, is

1. A cushion foot for typewriters and the like, including a vertical post, a pair of relatively movable plates applied to the post, one of the said plates being rigid with the post, while the opposite plate is movable with respect to the post, tension means between the plates, a resilient nonsound conducting pad applied to one of the plates and a rubber cap fitting around and receiving the said resilient pad and provided with means for positively engaging the said plate to retain the pad in position.

2. A cushion foot for typewriters and the like, including a post, a pair of relatively movable plates applied to the post, one of the plates being rigid with the post while the opposite plate is movable with respect thereto, a tubular bushing carried by the said opposite plate and projecting from one face thereof, said tubular bushing loosely receiving the post, a coil spring surrounding the post and interposed between the plates, a resilient pad applied to the movable plate and formed with 1 opening receiving the tubular bushing, and a rubber cap fitting around the resilient pad and constructed to positively engage the movable plate to retain the pad in position.

3. A cushion foot for typewriters and the like, including a vertical post,- an upper plate rigid with the post and applied thereto at an intermediate point in the length thereof, the upper end of the post being adapted to engage the foot of a typewriter, a lower plate having an opposed relation to the upper plate, a tubular bushing carried by the lower 2 coil spring.

4. cushion foot for typewriters and the like, including a lower plate, a tubular bushing applied to the lower plate and projecting upwardly and downwardly from the opposite faces thereof, a soft sound absorbing pad tubular bushing, and a spring interposed be-' tween the upper and'ilowerplates.

applied to the lower face of the said plate I and formed with an openinglreceiving the lower end 'of the tubular bu ing, a hollow rubber cap receiving the sound absorbing pad therein and formed at the month thereof with an annular lip adapted to fit around the edges of the lower plate to retain the pad in position, an upper plate arranged above the lower plate, a postri 'd with the upper plate and slidablyreceive within the :5. A cushion fq otfor typewriters and the like, including a lower'plate, a tubular bushing applied to the lower plate and projecting upwardly and downwardly from the opposite faces thereof, a soft sound absorbing pad applied to the-lower face of the lower plate and formed withian opening receiving the lower end. of the tubular bushing, a hollow rubber cap receiving the pad within the same and provided at the mouth thereof with an annular lip extending over the edges of the lower plate so as to retain'both the cap and the pad in position, a-vertical post having the lower end thereof slidably received within the tubular bushing, the upper plate rigid with the vertical post at an intermediate point in the length'thereof, the upper end of the post being adapted to engage the foot of a tgpewriter, and a coil spring surrounding t e post and interposed between the upper and lower lates.

In testimony w 'ereof I afiix my signature in presenoefof two witnesses- I CHARLES M. TURTON.

Witnesses:

MAXWEIL STEVENSON,

W. B. GREENLEAF.

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