Year: 1887

page_text: Date of Application, 24th Feb., 1887
Complete Left, 18th Apr., 1887.
Complete Accepted, 17th May, 1887
ALEXANDER WEIR and ANGUS WEIR Chairmakers both of 67 Sandyford Place
Lane Glasgow Scotland do hereby declare the nature of this invention to be as
follows:-
A new swivelling arrangement applicable to the seats, and seat supports of ship
chairs and other seats, requiring a similar action, whether made of wood, metal, or
a combination of wood and metal.
The advantages secured by this method of pivotting the seats, being that the sitter
can be placed as near to a table as desired, when facing the front and is swung
several inches further in a latteral direction, either to the right or left when leaving
the table than if an ordinary centre pivot was used. Thus allowing a conveniently
wide passage way as an ingress to, or egress from the table when a row of seats are
placed in position and further provides, when the seat is revolved, until the front faces
outwards, or away from the table the overhanging back of the seat clears the table top,
and also leaves space enough for a hand, between the said back and top.
These points or improvements are obtained in the following manner. The bottom
of the seat is provided with a slotted crossbar, in the slot there is loosely fitted, a flange
headed bolt or pivot pin, which overlaps and works in, the slot, and being carried
down through the crossbar, and top of seat support, is secured at its lower end, by
means of a screw, nut, and washer.
Thus affording a secure pivot connection between the seat and the stand or
support.
The slot in the crossbar allowing the seat to be pushed or guided, a certain length
off its proper centre, and to take advantage of the latitude thus provided an oval
channel or groove is cut in the top face of the stand or support, with its widest
points facing from front to back and its smallest diameter being from side to side.

page_text: And in this sunk channel or groove a guide pin or bolt is made to travel the upper
end of which bolt is also fixed to the slotted crossbar, outside or further from the
centre than the beforementioned slot.
Thus on revolving the seat to face sideways the guide pin is brought to the
narrow part of the oval groove and pushes the seat off its proper centre in a lateral
direction.
And as the pivot bolt works in a slot instead of a round hole, it presents no obstacle
to the seat being so pushed or guided, and provides a wide passage, on any side the seat
may be swung to.
The scat can then he brought to its proper centre, facing outwards or inwards, by
being still further revolved, causing the guide pin to travel to one of the furthest points
in the oval groove or channel.

page_text: ALEXANDER WEIR, Chairmaker and ANGUS WEIR, Chairmaker both of 67
Sandyford Place Lane Glasgow in the county of Lanark N.B. do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :--
Our invention consists of a new swiveling arrangement, applicable to the seats,
and seat supports of ship chairs, and other seats requiring a similar action, whether
made of wood, metal, or other substances, or a combination of wood, metal, and other
substances, and is adapted for use with seats either of a round, oval, or irregular
shape.
The advantages, obtained by this method of pivotting the seats, being, that the sitter
can be placed as near to the table as desired, when facing to the front. And on
leaving the table is swung several inches further in a lateral direction, either to the
right or left, than if an ordinary centre pivot was used. Thus allowing a conveniently
wide passage, as an ingress to, or egress from, the table.
When a row of such seats are placed in position. And while retaining the con-
venience of a seat that can freely revolve completely round either to right or left, or
can be made
swing to one side only if so desired.
Further provides, that when the seat is turned round, untill its front faces out-
wards, or away from the table the overhanging back of the seat, clears the line of the
table, and also leaves space enough for the User's hand between the seat back, and the
table top.
The whole arrangement being planned to avoid encroachment, either on the side or
back passages, where a limited space only, is available. The aforesaid advantages are
obtained, and the several parts of the seat and seat supports are constructed, in the
following manner.
Which will be more thoroughly understood by reference to the accompanying
drawings, figures 1 to 10.
Figure 1 is a perspective view of the stand, or seat support.
Fig. 2 is a perspective view of the seat (without the stuffed part) fixed on the stand
and facing to the front.
Fig. 3 is a plan of the seat facing the front.
Fig. 4 is a plan of the stand or seat support facing the front, with dotted line
indicating relative position of the seat, when fixed above it.
Fig. 5 is a plan of seat and seat support with the seat swung partly round.
Fig. 6 is a plan of same with the seat swung completely round, and facing out-
wards.
Fig. 7 is a plan of top plate of stand, arranged for allowing the seat to swing to one
side only.
Fig. S is a section of stand top.
Fig. 9 is an alternative arrangement of same and Fig. 10 is a section of stand top
and chair seat (with stuffing removed) fixed together.
On refering to fig. 3 it will be seen, that the seat is provided with a slotted
crossbar marked A which is preferably faced with a metal plate as shown in the
drawings..
In this slot marked B, there is fitted a flange headed bolt or pivot marked C, which
overlaps and works in the slot B. And being carried down through the crossbar A
and top of seat support at D figs. 1 & 4 and then secured by means of a nut and

page_text: washers affords a secure pivot connection between the seat and the stand, as shown in
the centre of Fig. 10.
The slot B in the crossbar A allows the seat to be pushed or guided a certain distance,
off its proper centre as shown at Fig. 5.
To take advantage of and control the latitude thus obtained, an oval channel or
groove, is cut in the top face of the stand or support.
This oval groove marked E on Figs. 1 & 4 can either be made of a T shaped
section as shown at F Fig. 8, or of a plane hollow section as at G Fig. 9.
But in any case it has its widest points placed from back to front, and its smallest
diameter being from side to side.
And in this oval channel or groove E a guide pin or bolt marked H, on drawings, is
inserted and made to travel.
The upper end of the guide pin H is rigidly fixed to a part of the crossbar A
outside, and farther from the centre than the slot B, and in such a position as to fit
into the groove E.
Thus on turning the seat to face sideways, the guide pin H is brought to the narrow
part of the oval groove E and pushes the seat off its proper centre in a lateral
direction as shown at Fig. 5.
And as the pivot bolt C works in the slot B in crossbar A, instead of being in a
round hole, it presents no obstacle to the seat being thus pushed or guided, by the
swinging action of the sitter.
And thereby provides a wide passage-way on any side, the seat may be swung to.
As shown by comparing the relative position of seat, as shown by dotted line in
Fig. 4.
And relative position of stand as shown by dotted lines on Fig. 5.
The seat can then be brought to its proper centre or position, (either facing outwards
as in Fig. or facing inwards as in Fig. 3) by being still further revolved. Causing
the guide pin H to travel to one of the farthest points in the oval channel E as shown
at Figs. 4 and 6.
In Figures 3, 4, 5 and 6 the line marked T-T represents the edge of the table top
at which the seat is to be used.
If the seats are wanted to swing to one side only, instead of completely round
stops for the guide pin H are provided at suitable distances, either by filling up a
portion of the groove E or having the top plate constructed with a C shaped groove,
as shown at Fig. 7. instead of an oval groove as at Fig. 4.
Having now particularly described and ascertained, the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is
1st. A new method of pivotting or arrangeing the underparts of revolving seats,
and the upper parts of the corresponding stands or supports for revolving seats,
whereby, a wider passage or clearance, on either side of said 'seats is obtained than if
an ordinary pivot pin was used.
2nd. A new method of preventing the overhanging backs of swivelled seats from
coliding with table or desk tops when the seats are fixed within a few inches of said
tops.
3rd. A new and simple mechanism for attaching to the seats of swiveling chairs
and there stands, or supports, whereby the said chairs, can be swung to any side
completely round, or only partly round as desired, and at the same time providing
wider passages at either sides or back, than if an ordinary pivot was used.
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LOOT
ALEXANDER WEIR.
ANGUS WEIR.