IMPROVE- MENTS IN MACHINERY OR APPARATUS FOR PRESS-SCREWING LAMP FURNITURE AND ANALOGOUS PARTS OR ARTICLES OF SHEET METAL
Year: 1884

page_text: I, JOSEPH SHELTON, of 16 Pool Street, Wolverhampton, in the County of
Stafford, machinist, do hereby declare the nature of my invention for, IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR PRESS-SCREWING LAMP FURNITURE AND
ANALOGOUS PARTS OR ARTICLES OF SHEET METAL, to be as follows:-
:-
A horizontal spindle, hereinafter called the screwing spindle, is mounted in
suitable bearings upon the framing of the machine, and upon this spindle aro
carried, so as to turn loosely thereon, a pair of bevel or mitre wheels facing one
another, with a clutch between them. This clutch is capable of sliding upon a
feather key upon the spindle. Suitable studs are fixed in the faces of the wheel
bosses and of the clutch, respectively, so that the clutch may be moved to take
into gear with either of the wheels. A second horizontal spindle, hereinafter called
the first-motion spindle, is mounted in suitable bearings upon the framing of the
machine and at right angles to the screwing spindle. The outer end of the first-
motion spindle carries fast and loose pullies or other mechanism by which power is
communicated to the machine, and the inner end of this spindle carries a bevel or
mitre wheel gearing into the bevel or mitre wheels upon the scrowing spindle.
The screwing spindle is provided with the usual male thread running through a
female thread in one of the bearings, so as to give the necessary traverse to the
spindle. A chuck of the usual description is fixed on one end of the screwing
spindle so as to revolve therewith in the usual manner, and a second chuck is fixed
on the other end of such spindle. One of such chucks is preferably a mule chuck
and the other a female chuck, so that the corresponding male and female parts of
any desired joint may be turned out in equal quantities by the machine. At each
end of the screwing spindle, but separate therefrom, and mounted upon two studs
which have their axes parallel with that of the spindle, are carried two rollers.
These rollers have exterior rings turned thereon to the size and pitch corresponding
with the male and female threads of the chucks on the ends of the spindle. The
studs carrying the rollers, aforesaid, are each formed upon or fixed to adjustable
slides carried upon blocks fixed upon the framing of the machine. These slides lie
upon the blocks, aforesaid, at right angles to the axis of the screwing spindle;
and the outer end of each slide has a screwed shank passing through a snug

page_text: projecting on the side of the block, each shank being provided with lock nuts so as
to give the slide an endway adjustment (that is crosswise of the machine) to
regulate the distance of the axis of the rollers from the axis of the spindle, thereby
regulating the pressure upon the chucks in screwing. Slots are formed through
the inner ends of the slides, through which pass set-screws for firmly fixing such
slides when properly adjusted. The two rollers at one end of the spindle are of
course adjusted to be internal to the female screwed die thereon, and the rollers at
the other end to be external to the male screwed die at that end. Upon the first-
motion spindle is fixed a worm, and this worm gears into a worm-wheel upon a
vertical spindle. At the lower end of this vertical spindle is fixed a spur wheel
carrying a cam upon its lower side, and this wheel gears into a similar wheel
turning loosely upon a stud and provided also with a cam upon its lower side. A
lever, having a horizontal motion, is fulcrumed between its ends to the framing
of the machine, and is connected at its inner end with a jawed alido taking around
the clutch upon the screwing spindle. This lever is provided at its outer end with
a roller which takes against the cams on the under side of the spur wheels,
aforesaid.
The operation of the machine is as follows:-Motion is conveyed through the
fast and loose pullies to the first motion spindle, and from thence through the
-bevel or mitre gearing to the screwing spindle which is thus rotated and screwed
endways-so.as to bring the chuck and rollers at one end thereof into operation, the
two rollers pressing either inside-or-outside against-the-two opposite sides of the
screwed chuck. Whilst this operation is going on, the worm-upon the first-motion_
spindle gives motion to the vertical spindle and to the two spur wheels and cams-
thereunder, and these cams are so constructed and arranged in relation to one
another-that-when the article at one end of the screwing spindle is screwed for the
proper distance, one of the cams, aforesaid, operates upon the lever having the
roller at one end thereof and throws over the clutch upon-the-screwing spindle
-into gear with the opposite wheel to that in which it has been in gear, thus
reversing the rotation-of-the-screwing spindle and therefore bringing back the
chuck at the end which has just been operative-and-screwing forward the other
end of the spindle to bring the chuck thereon into operation with the-rollers_at_
that end.
The cams on the lower side of the spur wheels, aforesaid, are arranged so that
as one cam passes out of contact with the roller on the horizontal lever, aforesaid,
the other cam passes into contact therewith forcing the lever back again and holding
it in that position.
The bevel or mitre wheels, aforesaid, upon the screwing spindle aro held in
position end ways, by means of grooves turned in their bosses into which tongue-
pieces are entered which are firmly fixed to the framing of the machine.
The blocks carrying the roller slides are themselves carried upon slides upon the
bed or framing of the machine so as to be capable of an endway adjustment.
Considerable advantage is derived from using two rollers in combination with a
chuck, instead of only one roller as in the ordinary method of press-screwing, as
the pressure being distributed equally on each side of the chuck the articles which
are being press-screwed do not require chucks shaped to fill them or support
them over their entire surface inside, and thus one chuck may be used for several
different shaped articles.

page_text: COMPLETE SPECIFICATION.
I, JOSEPH SHELTON, of Kingston Houso, Sedgley Street (formerly of 16 Pool
Street) Wolverhampton in the County of Stafford, machinist, do hereby declare
the nature of my invention for IMPROVEMENTS IN MACHINERY OR APPARATUS FOR
PRESE-SCREWING LAMP FURNITURE AND ANALOGOUS PARTS OR ARTICLES OF SHEET
METAL, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, referenco being bad
to the accompanying drawings and the letters of reference marked thereon:-
The object of this invention is to construct simple and efficient self-acting
machinery for press-screwing lamp furniture and analogous parts or articles of
sheet metal, and to arrange such machinery to press-screw an article alternately at
each end of the screwing spindle.
This invention will be readily understood upon reference to the accompanying
drawings, of which figure 1 is a front elevation of a machine constructed according
to this invention and figure 2 a plan thereof. Figure 3 is a detached plan of the
horizontal spur wheels, cans, and reversing lover hereinafter described, and figures 4
and 5 views of other details. Similar letters of reference indicate similar parts
throughout the several views. A A are standards supporting the bed-plate B B.
The front parts of the standards are broken in figure 2 and the lower part of the
right-hand standard in figure 1 for convenience of illustration. CC is a horizontal
spindle, hereinafter called the screwing spindle, and is mounted in bearings D D'
upon the bed-plate of the machine. E E' are mitre wheels carried upon the
screwing spindle C C¹ so as to be capable of turning loosely thereon. F is a clutch
capable of sliding upon a feather key upon the screwing spindle. a a are studs
projecting from the faces of the clutch, and b b are corresponding studs projecting
from the faces of the bevel wheels E E, so that the clutch F may be moved to take
into gear with either of the wheels.
G is a second horizontal spindle, hereinafter called the first-motion spindle, and
is mounted, so as to be at right angles to the screwing spindle, in the bearings H H
upon a backwardly projecting part J of the bed-plate B B. K and K' are respec-
tively fast and loose pulleys on the outer end of the first-motion spindle, such fast
pulley being the means by which motion is imparted to the machine. L is a mitre
wheel fixed upon the inner end of the first-motion spindle and gearing into the
mitre wheels E and E'. The screwing spindle is provided with the usual male
thread c, of the same pitch as that of the desired press-screws, running through a
female thread in the bearing D, so as to give the necessary traverse to tho spindle.
M and Maro respectively male and female chucks of the usual description, one of
such chucks being fixed to one end of the screwing spindle so as to revolve there-
with in the usual manner, and the other chuck being fixed to the other end of such
spindle so that the machine may be double acting, that is so that as the screwing
spindle is running back from screwing an article at one end thereof it may screw
au article at the other end thereof. The part of the chuck M projecting in front of
the screwing spindle is shewn in section by figure 2, as is also the article t¹ to be
press-screwed thereby; and the chuck M' together with the article t to be press-
screwed thereby, and also the end of the spindle, is shewn in section in this view.

page_text: It is not, of course, essential that one of the chucks shall be male and the other
female, as both may be male or both female, in which case when the articles of one
class have been press-screwed the chucks may be changed so that the corresponding
articles of the opposite class may also be press-screwed. It is convenient, however,
to use the chucks in pairs, as shewn upon the drawing, so that the corresponding
male and female parts may be thus turned out in equal quantities at a time.
N N¹ are angle pieces or blocks capable of sliding upon V-slides d d etc. upon
the bed-plate when loose thereon so as to be adjustable towards or from the
ends of the screwing spindle. ce are screw bolts passing each through a
slotted hole in the foot of an angle piece and also through a hole in the bed-
plate, and the angle pieces are fixed firmly upon the bed, when in their proper
position from or towards the centre of the machine, by means of these bolts.
ffff, are slides, one of which f¹ is shewn in plan to an enlarged scale by figure 4
and in inside end elevation by figure 5. g g and g¹ g¹ are rollers carried upon
studs projecting from the inside faces of the slides. These rollers have the usual
exterior rings turned thereon, as shown, to the size and pitch corresponding with
the male and female threads of the chucks on the ends of the screwing spindle.
The rollers g g are of course arranged exteriorly to the chuck M so as to press
the
outer side of the thread of the article to be press-screwed, and the rollers g¹ g¹are
arranged inside the chuck M¹ so as to press the inside of the thread of the article
to be press-screwed at that end-Each of these studs has a collar h at its back end
(see figures 4 and 5) which is clipped_by_a_guard-i-fixed upon the top of the
corresponding slide. Each roller is thus capable of revolving freely but is prevented
from moving outwards upon its, stud. Each slide for f¹ has a screwed-shankj
passing through one of a pair of snugs le standing up upon an angle piece N or N¹,
and held in place-therethrough. by means of the lock-nuts j¹ j¹; and thus the roller
carried by any slide is adjustable towards or from. the axis of the screwing spindle,
as may be necessary to place such roller in proper gear-with-the-corresponding
chuck, so-that the sheet metal to be press-screwed-may be so operated upon between
such rollor and the chuck. One-roller only, as is heretofore usual, may be employed
in conjunction with each chuck, if desired, buttwo-are preferred. Each slide forfl
is held down upon the top of its corresponding angle piece by means-of_a_pin_l
passing through a slotted hole in the slide.
k
O is a worm upon the first-motion spindle G, and gears into a worm-wheel P (of
which the teeth are shewn around a part of the periphery only, for convenience of
illustration) upon a vertical spindle Q, passing through a pillar or block Q. R is
a spur wheel fixed at the lower end of the spindle Q, and upon the upper side of
this spur wheel is carried a cam R¹. S is a spur wheel, of the same diameter as
the spur wheel R and gearing thereto, carried upon a vertical stud m, as shewn,
and S¹ is a cam upon such spur wheel S, and corresponds to the cam R¹. T is a
horizontal lever carried upon a stud n (see figure 3) projecting from the lower side
of the bed-plate. Figure 3 is a detached plan of the spur wheels R and S, cams R
and S, and lever T. 2 is a friction roller carried on the lower side of the back end
of the lever T. T is a bar capable of sliding longitudinally through blocks or
guides U U on the bed-plate of the machine, and U' is a vertical jaw fixed to the
bar T¹ and taking into the groove pl around the clutch F, and terminating down-
wards in a stud 9 which passes through a sliding block q¹ in a slotted opening in
the end of the lever T. This sliding block is employed to allow for the sideway
movement of the lever hereinafter described. A slotted hole is formed through the
bed-plate for the stud q.
The operation of the machine is as follows:-Motion is imparted to the driving
pulley K so as to cause it to revolve in the direction of the arrow a', and at a
velocity of say about 170 revolutions per minute, and thus the mitre wheel L
revolves the mitro wheels E and E¹, and gives motion to the screwing spindle in a
direction of rotation either forwards or backwards, according to which of the mitre
wheels E or E' is thrown into gear therewith by means of the clutch F. In the
illustration the wheel El is in such gear, and the screwing spindle consequently

page_text: revolves forwards and also endways towards the right-hand (in consequence of the
right-handed screw c passing through the screwed bearing in the block D) so as to
bring the chuck M and rollers g¹ g¹ into operation, with the two rollers pressing
inside against the sheet metal within the chuck and thus together with such chuck
press-screwing the female thread upon the article at such end. The articlo being
press-screwed at this end of the screwing spindle represents a lamp collar, and the
article represented at the other end is the corresponding male part. Whilst this
operation is going on, the worm O gives motion, through the medium of the worm-
wheel P, to the spur wheel R causing such wheel to rotate in the direction of the
arrow a³, and thus causing the wheel S to revolve in the direction of the arrow a³.
The cams R' and S¹ are so arranged in relation to the other parts of the mechanism
that when the screwing spindle has completed the press-screwing of an article at
the right-hand end thereof, as described, and as it is shewn to have done in the
illustration, the periphery of the cam S¹ passes out of contact with the roller p on
the end of the lever T, and the cam R¹, coming into contact with such roller, moves
the lever so as to throw the clutch F out of gear with the mitre wheel E' and into
gear with the mitre wheel E, by which means the screwing spindle is run backwards
so as to clear the article which is just completed and to press-screw an article at
the other end of the spindle. The cams R¹ and S¹ are shewn in figure 3 in the
relative position just referred to, that is, in position to commence reversing the
lever T and clutch F. It will be seen that when the end of the levor carrying
the roller p is moved into either its right or left position it is maintained in such
position by the periphery of the cam by which it has been so moved, until the
reversal of the lover is desired. rr are steel faces to the cams to give durability of
wear at the corners which bear against and force outwards the roller p to reverse
the lever T. The parts u u of the cams are inclined, as shewn, so as each to form a
guard along which the roller p is pushed as the lever T is moved by the opposite
cam, and consequently the roller cannot be struck forwards suddenly towards the
centre of the cam S¹, and thus a steady reversal of the clutch F is ensured.
are grooves turned in the bosses at tho backs of the mitro wheels E E¹, and
88 are anglo pieces or brackets fixed to the blocks D D', respectively, and have
tongues or vertical projections s¹ 8¹ entering into the grooves ¹¹, by which means
the mitre wheels are securely held in position endways.
The male chuck M is of course wormed or screwed exteriorly, and the female
chuck M interiorly, as is usual with chucks employed for the purposes described.
Considerable advantage is derived from using two rollers in combination with a
screwing chuck, instead of only one roller as in the ordinary method of press
screwing, as, the pressure being distributed equally on or in each side of the chuck,
the articles are more accurately press-screwed, and do not require chucks shaped
to fill them or support them over their entire surface inside, and thus one chuck may
be used for several different shaped articles, providing the same diameter of press-
screw is required in each case.
The wheels E E' and L are not necessarily mitre wheels, though they are preferred
to be so.
If the wheels E and E' are otherwise than of equal diameter with the
wheel L the reversing gear for the lever T must of course be proportioned accordingly.
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
1. The general combination and arrangement constituting the machinery or
apparatus for press-screwing lamp furniture or analogous parts or articles of sheet
metal, substantially as herein described and shewn by the drawings herewith.
2. In machinery or apparatus for press-screwing lamp furniture or analogous
parts or articles of sheet metal, a screwing spindle provided with a screwing chuck
at each end thereof in combination with suitable means for reversing the direction
of rotation of such spindle, substantially as and for the purpose herein described and
shewn by the drawings herewith,

page_text: 3. In a machine or apparatus for press-screwing lamp furniture or analogous
parts or articles of sheet metal, the combination of a first-motion spindle, & screwing
spindle at right angles thereto, mitre or bevel gearing to convey motion from one
spindle to the other, and suitable self-acting means for reversing the screwing
spindle, substantially as and for the purpose herein described and shown by the
drawings herewith,
4. The clutch F in combination with the wheels E and E¹ and suitable means
for reversing such clutch, substantially as and for the purpose herein described and
shewn by the drawings herewith.
5. In a machine or apparatus for press-screwing lamp furniture, or analogous
parts or articles of sheet metal, the means for reversing the direction of rotation
of the screwing spindle, substantially as herein described and shewn by the drawings
herewith.
6. The combination of the worm O, worm wheel P, spur wheels R and S,
cams R¹ and S¹, and lever T, constructed and operating, substantially as and for
the purpose herein described and shewn by the drawings herewith.
7. The cams R' S' in combination with the lever T; substantially as and for the
purpose herein described and shewn by the drawings herewith.
8. The inclined faces uu of the cams R' S', substantially as and for the purpose
herein-described and shewn by the drawings herewith.
9. In-machinery or apparatus-for press-screwing lamp furniture or analogous
parts or articles of sheet metal, the combination of-two-exterior rollers with a male
chuck; and the inverse combination of two interior rollers-with a female-chuck,
substantially as and for the purpose herein described and shewn by the drawings-
herewith.
10. In a machine or apparatus for press-screwing lamp furniture or analogous
-parts or articles of sheet metal, adjustable slides carrying the rollers, substantially
as and for the purpose herein described and shewn by the drawings herewith...
−11. The adjustable slides fand f¹, having shanks thereon, substantially as and-
for the purpose herein described and shewn by the drawings herewith.
12. The clips in combination with collars on-the-rollers g and g³, substantially
as and for the purpose herein described and shewn by the drawings herewith.
13. In a machine or apparatus for press-screwing lamp furniture or analogous
parts or articles of sheet metal, the angle pieces or blocks N N' capable of sliding
end ways on slides upon the bed-plate, substantially as and for the purpose herein
described and shewn by the drawings herewith.
14. The combination of an angle piece or block N or N¹ with adjustable slides f
or f, substantially as and for the purpose herein described and shewn by the
drawings herewith.
5
15. The angle-pieces or brackets ss having tongue-pieces thereon in combination 4
with the grooves in the bosses of the wheels E E', substantially as and for
the purpose herein described and shewn by the drawings herewith.
16. The combination of the clutch F, jaw U₁, sliding bar T' and blocks or
guides UU, with suitable self-acting means for reversing the clutch through the
medium of such combination, substantially as and for the purpose herein described 4
and shewn by the drawings herewith.