US1705791A - Control switch - Google Patents

Control switch Download PDF

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Publication number
US1705791A
US1705791A US234149A US23414927A US1705791A US 1705791 A US1705791 A US 1705791A US 234149 A US234149 A US 234149A US 23414927 A US23414927 A US 23414927A US 1705791 A US1705791 A US 1705791A
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United States
Prior art keywords
control switch
tension
lever
air
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US234149A
Inventor
Herschel E Tower
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BALDWIN Co
Original Assignee
BALDWIN CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BALDWIN CO filed Critical BALDWIN CO
Priority to US234149A priority Critical patent/US1705791A/en
Application granted granted Critical
Publication of US1705791A publication Critical patent/US1705791A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10F—AUTOMATIC MUSICAL INSTRUMENTS
    • G10F1/00—Automatic musical instruments
    • G10F1/02—Pianofortes with keyboard

Definitions

  • the object of this invention is to have the lever and valve on the control switch thrown to a position where the air tension in the player action will be controlled to the lowest degree after each roll is played.
  • Fig. 1 is a. diagrammaticvicw oil" parts of a mechanical instrument
  • Fig. 2 is a detailed view of the control switch showing the tension control handle in. two different positions and how it will be brought back to the lowest degree by the action of the rewind lever.
  • Fig. 3 is a perspective view of the control switch with two holes open and controlling the air tension to the medium or MF degree.
  • Fig. l is a perspective view of the control switch in the position it will be returned to by the action of the rewind-replay lever and controlling or setting the air tension back to the lowest degree.
  • the roll box 1 is made with a control switch 2, an indicator plate 3 and the lever 4 which being attached to the valve 5, can be moved to open one or more holes in the control switch 2, which holes are attached by suitable tubing to the air tension control box 6 so as to give the desired tension when playing a roll 01 music that has no automatic expression holes out in it.
  • the rewind and replay handle 7 that shifts the pinion 8 and large gear 16, out of engagement with pin 17 and sprocket 18 for rewinding, and into engagement with clutch collar 19 for playing has an extension 9 that extends below the shelf 10.
  • a wire 11 is slidably mounted in a stud 12 on the lever i and pivotally attached at its other end to the extension 9 that extends below the shelf 10. hen the lever l is set at PP this wire will slide in the stud 12 and not move the lever 4.
  • A. i'i'iecha'nical musical instrument having air tension controlling means and gear shitting means and a connection from said gear shifting means to said air controlling means to set the said air controlling means at the lolwestdegree of tension after playing are 1 roll.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stringed Musical Instruments (AREA)
  • Auxiliary Devices For Music (AREA)

Description

March 19, 1929. H. E. TOWER CONTROL SWITCH Filed Nov. 18, 1927 2 Sheets-Sheet 1 2 5755555 mmm March 19, 1929. H. E. TOWER CONTROL SWITCH 2 Sheets-Sheet.
Filed Nov. 18, 1927 Patented Mar. 19, 1929.
UNITED STATES HERSCHEL E. TOWER, OF CINCINNATI, OHIO, ASSIGNOR TO THE BALDWIN COMPANY OF CINCINNATI, OHIO.
CONTROL SWITCH.
gree. One means of doing this is to open.
certain holes in a switch, which causes the operation of the control Pneumatics in the air tension box so that the pneumatic player action will operate at the desired tension.
The object of this invention is to have the lever and valve on the control switch thrown to a position where the air tension in the player action will be controlled to the lowest degree after each roll is played. By this arrangement it is impossible for any one to put a roll on and set the switch to the highest degree and let the player operate indefinitely as the lever will return automatically to the lowest mark when the player rewinds.
In the drawing, Fig. 1 is a. diagrammaticvicw oil" parts of a mechanical instrument,
showing the roll box, gearing, control switch, pneumatic act-ion, tension control box and power plant. Fig. 2 is a detailed view of the control switch showing the tension control handle in. two different positions and how it will be brought back to the lowest degree by the action of the rewind lever.
Fig. 3 is a perspective view of the control switch with two holes open and controlling the air tension to the medium or MF degree.
Fig. l is a perspective view of the control switch in the position it will be returned to by the action of the rewind-replay lever and controlling or setting the air tension back to the lowest degree.
Referring more particularly to the drawings, the roll box 1 is made with a control switch 2, an indicator plate 3 and the lever 4 which being attached to the valve 5, can be moved to open one or more holes in the control switch 2, which holes are attached by suitable tubing to the air tension control box 6 so as to give the desired tension when playing a roll 01 music that has no automatic expression holes out in it.
The rewind and replay handle 7 that shifts the pinion 8 and large gear 16, out of engagement with pin 17 and sprocket 18 for rewinding, and into engagement with clutch collar 19 for playing has an extension 9 that extends below the shelf 10. A wire 11 is slidably mounted in a stud 12 on the lever i and pivotally attached at its other end to the extension 9 that extends below the shelf 10. hen the lever l is set at PP this wire will slide in the stud 12 and not move the lever 4.
When a roll has been put into the roll box 1 the rewind and replay handle 7 is slid to e left and the control lever 4 is moved to c ther P, Mi F or FF position as desired. l1or instance, if the lover l is placed at MF position, then the valve 5 is moved for enough to open holes in the switch and operate respective valves in the tension control box 6 to give a medium tension of air.
lVithout the application of this invention, if the lever 4 were to be set at F1! and the player action set to rewind automatically and repeat and is then left to keep on playing, it would be such a strain on the pumper l3 and motor 14 that they would soon become overheated. To overcome this the wire 11 has a collar 15 that works against the stud 12 when the rewind handle is set to rewind, torcing the lever 4i and the valve 5 to a position where all holes in the switch 2 are closed, thereby setting the air tension at the lowest degree for the start of the nextroll. This also sets the air tension at the proper degree to operate with a roll that has holes cut for the automaticcontrol of the air tension.
Many different designs of switches may be used, but what I claim as my invention is:
1. A. i'i'iecha'nical musical instrument having air tension controlling means and gear shitting means and a connection from said gear shifting means to said air controlling means to set the said air controlling means at the lolwestdegree of tension after playing are 1 roll.
2. A mechanical musical instrument hav HERSGHEL E. TOWER.
US234149A 1927-11-18 1927-11-18 Control switch Expired - Lifetime US1705791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US234149A US1705791A (en) 1927-11-18 1927-11-18 Control switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US234149A US1705791A (en) 1927-11-18 1927-11-18 Control switch

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US1705791A true US1705791A (en) 1929-03-19

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US234149A Expired - Lifetime US1705791A (en) 1927-11-18 1927-11-18 Control switch

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