US933527A

US933527A - Pneumatic-despatch apparatus.

Info

Publication number: US933527A
Authority: US
Inventors: William A Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-03-30
Filing date: 1908-03-30
Publication date: 1909-09-07
Anticipated expiration: 1926-09-07

Description

W. A, BROWN. PNBUMATIC DESPATGH APPARATUS.

APPLICATION FILED MAB.. 30, 1908.

Patented Sept. 7, 1909. 2 SHEETS-SHEET 1.

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W. A. BROWN. PNBUMATIC DESPATGH APPARATUS.

APPLICATION FILED MAR. 30, 1908. I n

Patented Sept. 7, 1909.

v @fifa/77g unir-En STATES -OFFC-f" WLLIAM A. BROWN, CHICAGO, ILLINOIS.

PNEUMATIC-DESPATCH APPARATUS.

To all whom it 'may concern.'

Be it known that I, WILLIAM A. BROWN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pneumatic-Despatch Apparatus, of whichvthe following is a specification. 7

My invention relates to pneumatic despatch apparatus, and the primary object thereof is to provide apparatus to minimize the sound caused by the carrier and particularly when in the act of delivery of the carrier.

An important feature of my invention consists in means disposed in the path of the carrier to oppose the momentum thereof.

A further feature of my invention consists in a muffler extension comprising an elbow -like structure with an oppositely curved opening therethrough.

With the above and other objects in view, my invention consists in the novel features and in the combination and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings, and particularly pointed out in the claims hereunto appended.

Like numerals of reference denote like parts in all of the figures in the accompanying two sheets of drawings forming a part of this specication.

Figure 1 is a vertical central section. Fig. 2 is a side elevation. Fig. 3 is a vertical section. Fig. 4 is a cross section on line 4 4 of Fig. 1. kF ig. 5 is a section on line 5-5 of Fig. 1. Fig. 6 is a section on line 6-6 of Fig. 1. Fig. 7 is a detail view.

Referring to the drawingsl by reference numerals, 8 denotes the usual transit tube, and 9 the usual pipe leading to the suction fan or vacuum means (not shown).

For the purpose of minimizing the noise of the carrier, particularly at the time of delivery, I have provided means, hereinafter described, normally disposed in the path of the carrier and capable of opposing but yielding to the momentum of the carrier to permit delivery thereof. In the delivery tube 10 there are lateral openings 11 extending lengthwise of the tube and covered by air-tight housings 11a, in each of which is positioned a strip 12 of felt or other material which is a non-conductor of sound or vibra- Specfcationrof Letters Patent.

Application filed March 30, 1908.

Patented Sept. 7, 1909.

Serial No. 424,224. Y

tion. At one end of each housing there is pivotally disposed one end of an arm 13 which `preferably is made of metal, but it may be made of any suitable or desired material, and faced at 14 with a material which is a non-conductor of sound or vibration, such as leather A spring element 15 urges the arm toward the axial center of the tube The arm 13 is pivoted at 16 through an ova' aperture 17 in one end and the opposite end may be caused to move from appronimatel;V the axial center of the tube through an arc of a circle to a plane outside the bore of the tube. At the opposite end of each arm is pivotally attached a sliding Valve or gate 1S with a metal reinforcing plate 19 suitably secured thereto. The metal eye 20 secured to the valve is movably secured to the bifurcated end 21 of the arm by bolt 22. One end of the delivery tube has fixed thereto collar 24 with flange 25, which has bolted thereto plate 25a by means of bolts 26. Cast with, or otherwise attached to plate 25a is a rectangular extension 27.

For the purpose of interposing additional means to check the momentum of the carrier and prevent sound or noise caused by the impact of the carrier with the parts, I employ what is termed a mufiier extension, the side walls 28 of which have internal beads 29. The front and rear walls of the muier extension are provided with metal strips 30 and leather strip 31. The structure is secured together by means of bolts 32, and issupported by form 33, and comprises a frame with oppositely curved opening therethrough lined on two walls with a material which is a non-conductor of sound or vibration. ln Fig. 2 the c arrier 34 approaching` delivery is shown in dotted lines.

The oval apertures 17 through the ends of the arms will permit the valves to be drawn air tight against the end of the delivery tube. The adjacent edges of the leather valves will be kept in air tight engagement by the action of the spring element 15, excepting when the momentum v of the carrier overcomes the force of the spring elements.

In operation when the valves 18 are drawn apart the suction or action of the air-forcing means (not shown) becomes effective in the well known manner to restrain the outward movement of the carrier.

It is apparent the mufHer extension may be omitted and the opening below the valves 18 Willbecome .the carrier exit.

It is thought the operation of my invention Will be manifest on reference to the drawings and foregoing description.

Variation in the form, arrangement and construction above described is possible, and Idesire, therefore, not toA limit my invention to such description of the preferred formv in which it has been embodied.

Having thus fully described my invention,

what I claim as new, and desire to secure byY Letters-Patent, is- Y l. A pneumatic despatch apparatus, comprising a delivery tube, a carrier, means for moving the carrier, in combination With a muffler-extension composed of a frame having an oppositely curved passage therethrough partly lined With a material which is a non-conductorl of sound, substantially as shown and described. Y

2. In a pneumatic despatch apparatus, in combination, a delivery tube having a pluralit-y of openings in the Wall thereof, a piv. oted arm capable of movement in each opening, a closure valve connected with one end 0f each arm the adjacent faces of the arms' being faced With a material Which is a nonconductor of sound or vibration, and a muffler extension having an oppositely .curved f 'opening therethrough.

In testimony whereof I aHiX my signature in presence of twoy Witnesses.- Y

' Y WILLIAMA. BROWN, lVitnesses:

vMevr CANNON,

S. ELVA KELLoGG.