US1059549A - Pneumatic actuating unit. - Google Patents

Description

N. MAGNUSON.

PNEUMATIC AOTUATING UNIT.

APPLICATION FILED JUNE 18, 1912.

Patented Apr. 22, 1913.

Inventor. Nels Magnysan eflzlorn ey.

OGRAFH 50-. WASHINGTO D. c.

- box 6.

UNITED STATES PATENT OFFICE.

NELS MAGNUSON, OF FORT WAYNE, INDIANA, ASSIGNOR TO THE PACKARD COMPANY, OF FORT WAYNE, INDIANA, A CORPORATION OF INDIANA.

PNEUMATIC ACTUATING UNIT.

Specification of Letters Patent.

Patented Apr. 22, 1913.

Application filed June 18, 1912. Serial No. 704,302.

T 0 all whom it may concern Be it known that I, NELs MAGNUSON, a citizen of the United States, and a resident of Fort Vayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Pneumatic Actuating Units, of which the following is a specification.

This invention relates to pneumatic actuating units for automatic musical instruments such as player pianos and has for its object to provide a device of the class specified, wherein the valve box is removably secured in operative relation to the other portions of said unit and is interchangeable with others of its kind in such position.

My improvements comprise means illustrated in their preferred form in the drawings accompanying this specification, wherein Figure 1 is a vertical sectional elevation of my improved unit. Fig. 2 is a similar view showing that unit with the valve box removed. Fig. 3 is a similar view of the removed valve box. Fig. 4 is a plan view of what is shown in Fig. 2. Fig. 5 is a plan view of what is shown in Fig. 3. Figs. 6 and 7 are a sectional elevation and a front view, respectively, of a modification of my improvements.

The usual tension box 2 having tension chamber 3 therein may be of such length as to serve a plurality of main pneumatics as 1 secured to one face thereof. Tension box 2 is so proportioned as to provide an angular space 5 for the reception of valve Said valve box is internally of known construction having channel 7 leading from its upper face to diaphragm chamber 8 under the usual disk valve 9. Said valve is located in chamber 10 having an outward opening channel 11 from said valve box. Passage 12 connects tension chamber 3 with channel 7 and passage 13 in said tension box connects channel 11 with main pneumatic 4.

Chamber 8 is provided with the usual diaphragm 14 for actuating valve 9 by meansof stem 16. Pipe 15 connects that portion of chamber 8 below diaphragm 14 with air inlet means not shown. Air channel 17 is provided in tension box 2 for communication with chamber 10 through opening 18 in valve box 6 when that box is in operative position relatively to said tension chamber.

Valve box 6 is provided at one end thereof with wedge shaped member 190 for engagement with similar shaped notch 19 in thelower part of tension box 2 for forcing said valve box toward its seat on said tension box when said tension box is pushed in wardly to the right, Figs. 1 and 2. Said wedge shaped means 190, 19 are eflicient for conjointly locating and securing one end of said valve box in its operative relations to the tension box and main pneumatic. The other end of said valve box is provided with spring clip 20 for engagement with ledge 21 of the tension box for seating that end of said valve box against the tension box and securing it in its seated position under tension. Ledge 21 is provided wit-h a slight dep-ressiono22'on its engaging face to counteract any tendency of spring clip 20 to be come disengaged from ledge 21 after being pushed into place thereon.

In Figs. 6 and 7 I have illustrated a modification of improvements for securing the outer end of valve box 6 in position relatively to the other parts of the pneumatic unit. Lever 25 is pivotally attached at 26 to the outer end of said valve box. Said lever is provided with an inwardly and downwardly reaching hook 27 for engagement with cam slot 28 in block 29 fixed to tension box 2. Said cam slot 28 is of such contour as to draw hook 27 and valve box 26 to which lever 25 is attached, inwardly and upwardly as that lever is swung in engagement with said slot in anticlockwise direction, Fig. 7 Said valve box, after wedge shaped members 190, 19 are in engagement, may be thus drawn upwardly and inwardly to the right, Figs. 1 and 2, by means of said lever in engagement with said cam path.

My improvements thus provide means for removing and replacing the valve boxes in a pneumatic device of the character specified by means of the hand only and without the use of tools of any kind. My improved construct-ion therefore adds greatly to the rapidity and ease with which repairs and replacements may be made.

I claim:

1. A pneumatic unit including in combi nation, a tension box, a main pneumatic, a valve box removably secured to said tension box and in operative communication with both the tension box and the main pneumatic, and means carried by the valve box for engaging fixed means on the tension box for forcing said valve box into operative relations, respectively, with said tension box and main pneumatic and for securing said valve box in said relations.

2. A pneumatic unit including in combination, a tension box having two walls rela tively disposed at an angle, a valve box removably secured to both of said walls, a main pneumatic mounted on the tension box, a passage through one of said walls from said tension box to said valve box, and a passage through the other of said walls from said main pneumatic to said valve box.

3. A pneumatic unit including in combination, a tension box, a main pneumatic mounted thereon, a valve box in operative communication with both said tension box and main pneumatic, and means independent of any other valve box for forcing said valve box into operative relations, respectively, with said tension box and main pneumatic and for securing said valve box in said operative relations.

l. A pneumatic unit including in combination, a tension box, a main pneumatic, a valve box removably secured to said tension box and in operative communication with both said tension box and main pneumatic, means at one end of said valve box for engagement with means on said tension box for forcing said valve box toward its seat on said tension box, and means at the other end of said valve box for engagement with means on said tension box for seating said valve box and for securing it in its seated position.

5. A pneumatic unit including in combi' nation, a tension box, a main pneumatic, a valve box removably secured to said tension box and in operative communication with both said tension box and main pneumatic, wedge shaped means at one end of said valve box for engagement with means on said tension box for forcing said valve box toward its seat on said tension box, and hand operated means at the other end of said valve box for engagement with means on said tension box for seating said valve box and for securing it in its seated position under tension.

6. A pneumatic unit including in combination, a tension box, a main pneumatic, a valve box removably secured to said tension box and in operative communication with both said tension box and main pneiimatic, wedge shaped means at one end of said valve box for engagement with means on said tension box for forcing said valve box toward its seat on said tension box and pivotally mounted means on said valve box for engagement with means on said tension box for adjustably locking said valve box in seated position relatively to said tension box.

7. A pneumatic unit including in combi nation, a tension box, a main pneumatic, a valve box removably secured to said tension box and in operative communication with both said tension box and main pneumatic, wedge shaped means at one end of said valve box for engagement with means on said tension box for forcing said valve box toward its seat on said tension box, and pivotally mounted means on said valve box for engagement with cam means on said tension box for drawing said valve box in two directions relatively to said tension box and for locking said valve box in seated position relatively to said tension box.

Signed at Fort WVayne, Indiana, this 12 day of June, 1912, before two subscribing witnesses.

NELS MAGNUSON. Witnesses HERBERT W'. BOND, J OHN M. KUHNs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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