US1021394A - Bell-ringer. - Google Patents

Description

E. WILSON. BELL 31mm. APPLICATION I'ILEIJ APR. 22, 1911.

Patented Mar. 26, 1912.-

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COLUMBIA PLANOflRAPl-l 60., WAsulN E. WILSON.

BELL BINGER. APPLICATION 311.1111 APR. 22', 1911.

Patented 1111261912.

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BELL RINGER.

APPLICATION FILED Ammz, 1911.

Patented Mar. 26, 1912.

3 SHEBTS-SHEET 3.

UNITED STATES PATENT OFFICE.

EDWARD WILSON, OF ST. LOUIS, MISSOURI, ASSIGNOR 'IO ADREON MANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

BELL-RINGER.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed April 22, 1911. Serial No. 622,725.

To all whom it may concern Be it known that I, EDWARD WILSON, a

fluid under pressure so as to actuate the bell with which the device is used.

One object of my invention is to provide a bell ringer that comprises only a few part-s and which is so designed that the operating medium exhausts freely on the down stroke of the piston, and another object is to provide an inexpensive bell ringer of simple construction that is economical in the con sumption of themedium used to operate the and the cylinder O is provided on its inner cylinder.

Other objects and desirable features of my invention will be hereinafter pointed tional view of the parts shown in Fig. 1;

Figs. 3 and 4 are detail views illustrating different adjustments of the device on the bell shaft that cotiperates with the operating cylinder of the ringer; Fig. 5- is a side elevational view showing a bracket of slightly different construction from the one illustrated in Fig. 2 for supporting the bell ringer; Fig. 6 is an enlarged vertical sectional view of my improved bell ringer; Fig. 7 is a similar view showing the cylinder at the end. of its power stroke or up stroke; Fig. 8 is a horizontal sectional view taken on the line 88 of Fig. 6 looking in the direction indicated by the arrow; Figs. 9 and 10 are vertical sectional views of a slight modification of my invention; and Fig. 11 is a horizontal sectional view taken on the line 11-11 of Fig. 9.

Referring to the drawings which illustrate the preferred form of my invention,

A designates a bell mounted in a yoke 1 that is provided with a horizontally disposed shaft 2 which is journaled in a supporting frame 3. The bell ringer is arranged under the bell shaft 2 and consists of a stationary piston B mounted on a bracket 1 connected to the frame 3, and a cylinder C reciprocatingly mounted on said piston and provided with a closed dome-shaped upper end or top 5 which cooperates with a roller 6 mounted in an arm 7 that is connected to the bell shaft 2. The piston B is hollow and comprises a pressure chamber 8 which communicates. with a supply pipe 9 and an expansion chamber 10 arranged above the pressure chamber and having its upper end open, said chambers being separated from each other by means of a partition wall 11 which is preferably formed integral with the piston. The pressure chamber 8 is provided acent its upper end with an outlet port 12, the expansion chamber is provided adjacent its lower end with an inlet port 13 side with an annular'duct 14 which alines with said outlet and inlet ports when the cylinder is at the end of its downward stroke, as shown in Fig. 6. A packing ring 15 is arranged in an annular groove formed in the exterior of the piston B below the inlet port 12 that leads from the pressure chamber, and a packing ring 16 is arranged adjacent the upper end of the piston in a relatively wide annular groove or recess 17 formed in the exterior of the piston, said ring 16 also acting as a slide valve or closure for an exhaust port 18 that is formed in the side of the cylinder adjacent the upper end of same. Both of said rings preferably consist of split metallic expansion rings which snugly engage the inner surface of the cylinder C, and the groove or recess 17, which receives the ring 16 at the upper end of the piston, is so proportioned that said ring can move relatively to the cylinder on the power stroke or upward stroke of the cylinder and thus uncover the exhaust port 18 which said ring normally closes.

The means shown in Figs. 6 and 7 for moving the valve ring 16 so as to ,uncover and cover the exhaust port 18 consists of the top and bottom shoulders or edges 17 and 17 respectively, of the groove 17 in which said ring is arranged, but I do not wish it to be understood that my invention is limited to the exact construction herein shown for other means might be used for controlling the exhaust of the operating medium without departing from the spirit of my invention.

The operating medium, which may be any suitable fluid under pressure, is supplied to the pressure chamber 8 by means of the supply pipe 9 and escapes from said chamber through the port 12 and thence through the annular duct 14c and inlet port 13 into the expansion chamber 10, thereby causing the cylinder C to move upwardly and rock the shaft 2 to which the bell is connected. As soon as the cylinder C starts to move upwardly the supply of pressure to the expansion chamber 10 is cut off because a very slight upward movement of the cylinder carries the annular duct 14 on the interior of same out of alinement with the outlet port 12 of the pressure chamber and the inlet port 13 of the expansion chamber. Consequently a bell ringer of this construction is economical in the consumption of the medium used to operate same for only a very small quantity of the operating medium is admitted to the expansion chamber at each cycle of operations and the upward movement of the cylinder is effected by the expansion of said medium after it enters the expansion chamber. The resiliency of the valve ring 16 causes it to remain in snug engagement with. the inner side of the cylinder C over the port 18, when said cylinder starts to move upwardly but when said ring strikes the shoulder 17 the ring will stop or remain at rest, while the cylinder continues to move upwardly, thereby causing the exhaust port 18 to be uncovered by the time the cylinder reaches the end of its upward stroke, as shown in Fig. 7. The operating medium escapes from the expansion chamber 10 through the exhaust port 18 and the cylinder C then starts to move downwardly owing to the fact that there is nothing to sustain it in its raised position, the valve ring 16 being moved automatically into its operative position over the exhaust port 18 when the lower edge of said ring strikes the shoulder 17 on the piston. When the cylinder reaches the end of its downward stroke, as shown in Fig. 6, another charge is admitted to the expansion chamber and the cycle of operations above described is repeated, thereby causing the cylinder to reciprocate upwardly and down wardly and thus automatically rock the bell shaft 2 so long as pressure is maintained in the pressure chamber 8.

A bell ringer of the construction above described can be manufactured cheaply and is not liable to get out of repair because it comprises only three parts, namely, the stationary piston, the cylinder which reciprocates on same, and the combined slide valve and packing ring 16 which is moved automatically into and out of operative position with relation to the exhaust port 18, by the upward and downward movement of the cylinder. The fact that the operating medium exhausts freely on the downward stroke of the cylinder and is not withheld for compression is a very desirable feature of my bell ringer because it eliminates strains on the cooperating parts of the device; and still another desirable feature is that the period of intake of the operating medium is very short and the full expanding force of said medium is utilized on the upward stroke of the cylinder.

The partition wall 11 in the piston B is preferably inclined, as shown in Figs. 6 and 7, so as to enable the ports 12 and 13 to be formed in the same horizontal plane and the duct let tobe formed straight instead of spirally, but it will, of course, be understood that the same results could be accomplished in various other ways without departing from the spirit of my invention. Furthermore, instead of mounting the device on a bracket 4 that is connected to lug 3 on the frame 3, a bracket 4 of the kind shown in Fig. 5 could be connected directly to said frame by a U-bolt 4? or other suitable device.

The roller 6 and arm 7 on the bell shaft 2 are so constructed that the bell-ringing device can be adjusted properly with relation to said roller without changing the position of the bracket on which the bell-ringing device is mounted. As shown in Figs. 1, 2, 3 and 4:, the arm 7 is bifurcated to receive the roller 6, thus forming a pair of jaws which project" laterally from a hub 20 that is detachably connected to the bell shaft 2 by means of a fastening device 21, said hub having a portion that projects laterally beyond one of said jaws. The roller 6 is mounted on a pin 22 that passes transversely through said jaws, and said roller is provided with an integral collar or sleeve 23 that projects laterally from one side of the roller, thereby causing the roller to lie closer to one of said jaws than to the other. If the roller does not aline properly with the dome 5 of the cylinder C, the roller 6 can be removed and transposed, as shown in Fig. 3, so as to carry the roller farther away from the end of the shaft 2, and if it is necessary to move the roller inwardly still farther from the end of the shaft 2, the arm 7 is removed and transposed, as shown in Fig. 4, so as to carry both jaws of the arm away from the end of the shaft 2. In this way I am able to adjust the bell ringing device accurately relatively to the bell shaft without changing the posit-ion of the bracket on which the device is mounted.

In Figs. 9 to 11, inclusive, I have illustrated a slight modification of my invention wherein the valve that cooperates with the exhaust port 18 in the cylinder C consists of a sleeve 30 slidingly mounted in the upper portion of said cylinder above the upper end of the piston B and provided in its outer surface with a groove which receives a split spring packing .ring 16 that holds the valve in position with relation to the cylinder and causes it to move with the cylinder. The partition wall 11 in the stationary piston B is provided with an upwardly projecting stem 31 having a head 32 which cooperates with arms or an inwardly projecting flange 33 on the valve 30 to limit the upward movement of said valve, the space between said stem and the inner edge of said flange being large so as tonot interfere with the expansion of the fluid in the expansion chamber. WVhen the cylinder C moves upwardly from the position shown in Fig. 9 the head 32 on the stem 31 arrests the up ward movement of the valve 30 when the flange on said valve strikes the under side of said head, thereby moving the valve rela tively to the cylinder C and thus causing the exhaust port 18 to be uncovered. When the cylinder moves downwardly the valve 30 will move downwardly with it until the valve strikes the upper end of the piston B, the further downward movement of the cylinder causing the valve to be moved over the exhaust port 18 so as to close said port.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a bell-ringing device, a piston provided in its upper end with an expansion chamber which is open at one end, a cylinder reciprocatingly mounted on said piston and having a closed end which forms the other end wall of said expansion chamber, means for intermittently admitting small charges of fluid under pressure to said expansion chamber, which fluid expands and thus moves said cylinder in one direction, and means for permitting said fluid to exhaust or escape freely from said chamber when the cylinder approaches the end of its stroke and when it moves in the opposite direction nearly to the end of its stroke.

2. In a bell-ringing device, a hollow piston provided intermediate its ends with a partition or cross web that divides the interior of same into a pressure chamber and an expansion chamber, the expansion chamber being open at one end, a cylinder reciprocatingly mounted on said piston and forming a closure for the open end of said expansion chamber, cooperating means on said cylinder and piston for permitting small charges of fluid to pass from said pressure chamber into said expansion chamber wherein said fluid expands and thus moves said cylinder upwardly, and a port which permits the fluid to exhaust from said ex pansion chamber when said cylinder reaches the end of its upward stroke and continues to exhaust until said cylinder reaches nearly the limit of its downward stroke.

3. In a hell-ringing device, a hollow piston provided intermediate its ends with a cross Web or partition that divides the interior of same into a lower chamber and an upper chamber, said upper chamber being open at its upper end, a cylinder reciprocatingly mounted on said piston and having a dome-shaped upper end of greater internal diameter than the external diameter of the piston, means for supplying fluid under pressure to the lower chamber of said piston, means for permitting a small charge of said fluid to enter the upper chamber of the piston in which it expands and thus moves the cylinder upwardly, an exhaust upward stroke and while it is moving downwardly, a valve cooperating with said exhaust port, and means for actuating said valve so as to open and close said exhaust port.

4:. In a bell-ringing device, a hollow piston provided intermediate its ends with an inclined web or partition that divides the interior of said piston into a pressure chamher and an expansion chamber, a cylinder reciprocatingly mounted on the upper end of said piston and forming the end wall of said expansion chamber, an annular groove on the interior of said cylinder, and an out let port and an admission port for said pressure and expansion chambers, respectively, located in the samehorizontal plane and adapted to cooperate with the annular groove on the interior of said cylinder.

5. In a bell-ringing device, a hollow pis' ton provided intermediate its ends with a cross web or partition that divides the interior of same into a pressure chamber and an expansion chamber, a cylinder reciprocatingly mounted on said piston and having a dome-shaped 'top which forms one wall of said expansion chamber and into which the upper end of the piston extends when the cylinder is at the end of its downward stroke, means for permitting a small charge of fluid under pressure to pass from the pressure chamber into the expansion chamher in Which it expands and thus moves the cylinder upwardly, an exhaust port in said cylinder arranged adjacent the upper end of same for establishing direct communication between said expansion chamber and v the valve and thus move it into and out of operative position When said cylinder reoiprocates.

In testimony whereof I hereunto affix my signature in the presence of tWo Witnesses, this eighteenth day of April 1911.

EDXVARD WILSON.

\Vitnesses 2 \VELLs L. CHURCH, GEORGE BAKEWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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