US1075682A - Organ-pipe. - Google Patents

Description

R: Y. BARROWS.

ORGAN PIPE.

APPLICATION FILED NOV. 30, 1912.

1,075,682 Patented 001.14, 1913.

Il'lIIIIIIII/IIIIIIA -Q j IIIIII/IIIA 4104. 8- W v INVENTOR v for one set of ordinary pipes,

lllllTED STA -lflllid PATENT Ql l lQEQ ROBERT Y. Bannows OFRU'IHERFORD, new z'nnsnv, nssrcuon or onunnrr TO GEORGE H. HARMAN, O1? GLEN RIDGE, NEW JERSEY.

Speeifiwtion of Letters B n Patented Oct. 14% 1 913.

Application filed November 30, 1912. Serial No. 734,283.

of Rutherford, in the county of Bergen and State of New Jersey, have invented an Imirovcment in Organ-Pipes, of which the' following description, in connection with the accompanying drawings, is a specifica' tiou, like letters on the drawings representing like parts.

This invention relates to improvements in the labial pipes of an organ, being concerned more particularly with pipes of the pedal department.

The principal object of the invention is to provide a new embodiment of an earlier invention made by me which described and claimed. in Letters Patent No. '1 006,425, dated October 1'7, 1911, and further described and claimed in an application for Let ters Patent; Serial Number 657,128 filed O0: tober 27, 1911. It is. desirable to have an embodiment of my ad lier invention which does not require any enlargement of the wind-chest beyond what would be required and also one which canbe readily applied to an existing organ, leaving both. the pipes and the wind-v chest substantially unchangedupon the eX- terior.

The present embodiment of my invention is shown in five figures of which, 4

Figure 1 consists of a longitudinal section through the lower end of'a pipe and the upper portion of the chest. Fig. 2 consists of a front elevation of the lower end of said pipe with the lower front portion, Fig. 3 consists of plane indicated by the line w-y in Fig. 2. Fig. 4- is a perspective view of a portion of a stop of pipes shown mounted on the windchest, and, Fig. 5 consists of separate detail sectional views showing different positions of a valve which may be used in connection with the improvements.

According to my earlier invention, two slits of different lengths are provided for each pipe and each is adapted to deliver a sheet of air across the mouth of the pipe, the longer slit causing the pipe to speak its regular tone while the shorter slit causes the pipe to yield a softer tone of the same pitch.

In the present drawings, the two slits are denoted by c and b rectly abovethe wind-inlet or foot 9. Thus the 'windinlet communicates directly with the large a? denotingthe longer slit and L the shorter slit. The longer slit,

as will be seen from Fig. 1, is formed by the block a and the cap, and communicates with the space 0 underneath the block and dithe longer slit 0 through the space 0.

The shorter slit 5 is parallel with and just in front of the longer slit 0, and is formed as the upper end of a passage or space 6 formed in the cap, this space communicating with the wind-inlet g by means of a passageway g bored in the bottom of the pipe. For the purpose of forming the space I). and the slit 5 it is preferable, as shown in Fig. 1, to make the cap in two parts the exterior portion being cut out'to form. the spacer and the inner portion consisting of a plain narrow strip a glued or otherwise fastened to the exterior portion of the cap as indicated in theligure referred to.

In order to control the delivery of wind to the respective slits so that the pipe may be caused to speak its lender or softer tone at will, the latter is provided with a valve 60 located inside and preferably in the space 0 underneath the block a, the said valve being adapted to cutol'f communication between the wind-inlet and the space 0, that is, between the windinlet and the slit 0 A convenient form of said valve for the present purpose is what is known in organ construction as a. putt-valve such as is shown in Figs. 1 and 2' of the drawing, although various forms of valves, pneumatic or otherwise, may be employed. The valve shown con sists of a member *1 hollowed out to form a chamber 7* which is covered with a flexible membrane r of soft, closegrained leather or other air-tight, pliable material glued around the edge; anda seat 7* is provided for the same, the latter'being mounted upon the bottom of the pipe in such a way asto constitute the'top of the wind iulet which is thus adapted to be closed by the valves 100 membrane. A passage 7' is cut partly in the block and partly in the side wall of the pipe and leads from the chamber 7 to some suitable source of compressed air supply.

When several of these pipes are mounted in position to constitute a stop, a convenient sourceof compressed air supply may consist of a chamber such as the duct '0 (Figs. 1

and 4) with which all of the passages r communicate, While the duct 0' itselfcom-.

Fi 4-) to admit air ,chest, the loud stop knob c operates an additional valve or other means 8 controlling the admission of air to the duct 0 which, as has already been observed, is in communication with all of the chambers r of the pufl-valves through the passages 1*. When the loud stop knob is drawn, the position of the valve 3. will be as indicated in the lowest view of Fig. 5 where the passage 8 connecting the duct 0 will be seen to be in communication with the atmosphere through the space 8 in the end of the valve casing 8. Thus the membrane r of each pipe in the stop will be limp whereby the wind through the wind-inlets will issue through both the slits of the pipe causing the latter to speak its loudest tone. When the loud stop knob is shut off, the duct 0 will become charged with organ wind, inasmuch as the valve 8 will be in the position indicated in the two upper views of Fig. 5 placing said duct in direct communication with the wind-trunk 0 through the connecting passages s and 8 In this position, the valve membranes will press down closely upon their respective seats, thereby cutting off the wind-supply from the longer slits c the slit c and when the loud stop is closed, the action of the membranes in moving down upon their seats will be instantaneous owingtothe relatively broad area of the surface of the membranes and the relief afforded through When now, the soft stop I)? is drawn to charge the wind-chest with organ wind, the air admitted through the feet 9.

will be confined to the passages p and b and will issue only from the slits 6 causing the pipes to speak their softer tone; and it will be obvious that the issue of air through the inlets 9 under these conditions will have no effect upon the membranes? on account of the relatively small area of the membranes exposed to this air and the relief afforded through the slits b i It will thus be seen that with the present improvements the chest and key action is the same in every respect as though a single set of ordinary one power pipes were employed. Moreover, it will be seen that the improvements may be applied to an existing set or stop of organ pipes with very little diificulty and without necessitatii'ig any change whatever in the wind-chest or in the exterior of the pipes themselves. It

'will be understood, of course, that other forms of valves than. that shown may be employed in carrying out the invention. It may be observed also that the present mechanismvmay be used in ordinary one power pipe and chest and branching after it leaves the chest into two air passages, and a valve to open and close one of the passages, said organ pipe having two slits of unequal lenqthseach of which is adapted to dis charge a sheet of air to cause the pipe to speak, the valve-controlled passage communicating with the longer slit, and the other passage communicating with the shorter slit, whereby when the wind-inlet is opened to the wind-chest, the pipe speaks from one or both slits according as the valve is closed or open.

2. The combination of a labial organ pipe, a wind-chest, a wind-inlet connecting the pipe and chest and branching. within the pipe into two air passages, and a valve within the pipe to open and close one of the passages, said pipe having two slits each of which is adapted to discharge a sheet of air to cause the pipe to speak, one of the said passages communicatlng with one of the slits, and the oth-r of said passages communicating with the other slit.

3. The combination of a labial organ pipe, a wind-chest, a wind-inlet connecting the pipe and chest, a valve within the pipe to close the delivery-end of the wind-inlet, said wind-ink having a passage which leads therefrom at a poirt between the wind-chest and said valve, and said pipe having two slits each of which is adapted to discharge a sheet of air to cause the pipe to speak, one of said slits being in communication with the said delivery end of the wind-inlet and the other of said slits being in communication with the wind-inlet through said passage.

4. The combination with a labial organ pipe having a single mouth, a single windinlct, a block and a cap, the cap and block forming the normal slit of the pipe, and the cap being provided with a passage terminating in a second slit parallel to the first slit, of means forming a passage connecting the first named passage and said wind-inlet, a puff-valve in the space between the block and the wind-inlet to close the opening of the wind-inlet into said space, a Windsupply, and means forming a passage to operatively connect the valve with the windsupply,,,

5. The combination with an or an pipe having a single mouth, and a slit a5 deliver a sheet of airacross said mouth, of a block forming one edge of the slit, and a sin le wind-inlet delivering into the space un erneath the block, a pneumatic valve located within the space underneath the block and adapted to cut ofl communication between the wind-inlet and said space, and means to actuate said valve in order to open and close the same at will.

6. The combination with the wind-supply means of an organ, the wind-chest communicating therewith, and a stop of pipes communicating with the wind-chest each having two slits bothof which are adapted independently to make the pipe speak, of pneumatic means in each pipe to admit and out off the wind from the wind-chest to one of the slits, a duct in communication with all the said pneumatic means, connections between'the wind-supply means and the said duct including a valve, the latter being adapted in one position to connectithe said duct with the atmosphere and; in another position to connect the said duct with the wind-supply means, and two stop valves each adapted to admit wind from the windsupply means to the wind-chest, one of said stop valves being operatively connected to the-first-named valve whereby when it is drawn to admit air to the windchest the first-named valve will be in position to connect the said duct with the atmosphere and vice versa. 7

In testimony whereof, I have signed my name to this specification, in'the presence of two subscribing witnesses, on this 26th day of November, 1912. I

JOHN W. THoMrsoN, -LUCIUS E. VARNaY.

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