US2229769A - Adjustable seat - Google Patents

Description

Jan. 28, 1941. i A; RADERS 2,229,769

ADJUSTABLE SEAT A iiomeys v 4 .79 Y ja'gifl.

Inventor Jan. 28, 1941.

A. F. RADERS ADJUSTABLE SEAT Filed Dec. 26, 1939 3 Sheets-Sheet 2 A iiorneys Inventor Jan. 28, 1941. A. F. RADERS ADJUSTABLE SEAT s Sheets-Shet 5 Filed Dec. '26, 1939 A iiomeys Patented Jan. 28, 1941 s'r'r" This invention relates to an adjustable seat which is mainly designed for locomotive engineers, the general object of the invention being to provide a seat having a depending member matically and properly take the weight of the 10 person occupying the seat in accordance with the weight, so that the seat is a resilient one and the spring means adjust themselves to the amount of the weight of the occupant of the chair.

Another object of the invention is. to provide means for adjusting the vertical position of the spring which controls the height of the seat of the chair from the base and also to provide novel footrest means.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figur'el is a side elevationalview of the improved chair. Figure 2 is a front view thereof.

Figure 3 is a vertical sectional view'through the lower part of the supporting means for the chair.

. Figure 4 is a section on the line 4-4 of Fig-.

ure 1.

Figure 5 is a section on the line 5-5 of Fig- ,ure 2.

Figure 6 isa section on the line '66 of Figure 1.

Figure 7 is a section on the line '|-'l of Figure 3.

Figure 8 is a top plan view of the conical base member. s

Figure 9 is a top plan view of the footrest supporting means.

Figure 10 is a view partly sectio of the upper disk. a K

Figure 11 is a similar view of the lower disk.

In these views the numeral l indicates a base plate to which is connected by welding or thelike the lower end of a tubular member 2 and also secured to the plate l within the tubular member 2 is a conical base 3 which has a centrally ar-' ranged hole 4 therein for the passage of a ver-' tically arranged screw shaft 5, the lowerend of which is-supported on the base plate I within the member 3 bythe anti-friction means 5. A beveled gear 1 is connected to the lower end of the shaft 5 as shown at 8 and a beveled gear 9 is also'looated in the space formed by the member 3 and engages the gear I and is attached to a socketed hub 10 rotatably arranged in a bearing part II formed on the member 3 as shown more clearly in Figure 8. The socket in the member In is of non-circular shape in cross section to receive the non-circular part of a shaft H which has a crank outer end I3 acting as a handle and said shaft is journaled in an upright bracket l4 attached to an outer part of the plate I. A U- shaped clip l5 (see Figure 7) is fastened to a part of the shaft l2 by a bolt l6 engaging a flat part of the shaft and said clip is locatedadiacent the bracket It to removably hold the shaft go 12 in position with its non-circular innerend engaging the socket in the member ID. By removing the clip the shaft can be withdrawn. As will be seen this arrangement provides means for rotating the screw shaft 5 to adjust vertically a disk It which has an internally threaded hub I9(see Figure 11) through which the threaded part of the shaft passes. The upper face of this disk I8 is provided with-three annular grooves 20, the outer one of which. receives a long and wide coil spring 2|, the intermediate one of which. receives a shorter and narrower coil spring 22 while the inner one receives a. short and still narrower coil spring 23, all the springs tapering upwardly as shown in Figure 3.

A tubular member 24 has sliding movement in the member 2 and a disk 25 extends across the tubular member 24 and is welded thereto as shown at 26 and the hub 21 of this disk 25 (see Figure 10) is plain so that it has a sliding movement on the shaft 5. The lower face of this disk 25 is provided with three annular grooves 28 for receiving the upper ends of the springs though when the seat is unoccupied only the upper end of the long outer spring 2| will engage the disk 25.

Vertically arranged ribs 30 are connected with the exterior part of" the member 24 and are spaced apart and extend into the member 2. An arcuate vertically arranged plate 3| is attached to the inner circumference of the tubular member 2 and extends between the space between a pair of these ribs 30 and acts to prevent rotary movement of the tubular member 24 in the memher 2. A notch 33 is for'medin the lower end of i the member 24 to pass over the shaft [2 when the member 24 nears the lower end of its downward movement.

A seat base 35 is secured to the upper end of the tubular member 24 and a cushion 36 is supported by this base 35, this cushion preferably being formed of baked sponge rubber covered with a suitable covering, as shown in Figure 5.

The back plate of the seat is shown at 31 and the cushion part 38 carried thereby contains the springs 38 as also shown in Figure 5.

A hole 40 is formed in the lower end of the outer tubular member 2 for the escape of any moisture which may collect in the member 2.

Upwardly and rearwardly sloping uprights 4i are secured in spaced relation to the front of the base plate I and these uprights have the longitudinally extending slots 42 therein, the front walls of which are formed with the spaced notches 43. The footrest 44 includes a plate 45 fastened to the angle members 46 which project rearwardly from the plate and their vertical flanges have the outwardly extending projections 41 thereon which fit in the slot 42 and adapted to engage the notches 43 to hold the footrest in adjusted position. As shown in Figure 1 the footrest can be tilted upwardly and rearwardly so as to space the rear ends of the members 46 from the inwardly extending flanges 4| of the uprights 4|, see Figure 3, and then the projections 41 can be moved along the slots 42 to place the projections 41 in the desired pair of notches 43. Then by tilting the footrest downwardly the said footrest will be held in adjusted position in the uprights 4I-.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent,

It is to be understood thatchanges may be made in the constructionand in the combination and arrangement of the several parts provided that such changesfall within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A seat of the class described comprising a tubular upright base member, a second tubular member slidably arranged in the base member, a seat connected with the upper end of the sec- 50 0nd tubular member, a transverse member in comprising a base plate, a tubular member ateach tubular member, a plurality of springs having their lower ends engaging the transverse member in the first tubular member, said springs being of different lengths and of difierent diameters with the longest spring engaging the trans- 5 verse member of the second tubular member, and means for raising and lowering the transverse member in the tubular base member.

2. A seat of the class described comprising a tubular upright base member, a second tubular 10 member slidably arranged in the base member,

a seat connected with the upper end of the second tubular member, a transverse member in each tubular member, a plurality of springs having their lower ends engaging the transverse mem- 15 ber in the first tubular member, said springs being of different lengths and of difierent diameters with the longest spring engaging the transtached thereto at its lower end, a seat, a tubular 30 member having its upper end connected with the seat and the second-mentioned tubular member having a sliding fit in the first tubular member, means for preventing rotary movement of the second tubular member in the first tubular 35 member while permitting vertical movement thereof, a plurality of spring means supported in the first tubular member, said springs being of different lengths, a transverse member in the second tubular member for engaging the upper 40 ends of said springs, a seat for the spring means located in the first tubular member and means for adjusting the spring seat vertically to raise and lower the tubular member which carries the first-mentioned seat, said means including a part 45 extending through a side portion of the first tubular member whereby the spring seat can be adjusted from the exterior of said tubular member.

ALBERT F. RADERS.

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