Improvements in the Method of and Means Employed for Locking or Fixing Screws.
Year: 1899

page_text: Date of Application, 20th June, 1899
Complete Specification Left, 27th Feb., 1900-Accepted, 31st Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Means Employed for Locking or
Fixing Screws.
I, JAMES BARBOUR, of the Firm of Combe, Barbour, and Combe, Limited,
Falls Foundry, Belfast, Ireland, Machinist, do hereby declare the nature of this
invention to be as follows:
This invention relates to improvements in the method of and means employed
for fixing and locking screws in position and is specially applicable in connec-
tion with the screws employed for holding the collars in the rails of spinning
frames, and for "grub" screws used on door handles and the like. The invention
consists in the use in combination of two screws, one of which constitutes the.
holding screw, the other the locking screw which obviates the tendency of the
first screw to become loose through vibration of the part with or on which it
works.
According to this invention I employ two screws of like diameter and pitch
of thread and after one screw is screwed into position and well into the chased
hole provided for it, the second screw is screwed into the same hole and the second
screw has a conical or tapered point which enters the nick or slit in the first
screw and thereby tends to expand or open the latter and lock it in position.
When used in connection with the collars in spinning frames. the end of the
first screw has a round point squared or flattened at the end and engages with a
corresponding recess or hole in the collar and thereby the latter is held firmly
in position but is allowed a limited amount of movement.
Dated thin 17th dox of Tung 1800
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax, Agents for the Applicant.
CUALI DEL DEUT
Improvements in the Method of and Means Employed for Locking or
Fixing Screws.
•
I, JAMES BARBOUR, of the Firm of Combe, Barbour, and Combe, Limited,
Falls Foundry, Belfast, Ireland, Machinist, 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:-
-
This invention relates to improvements in the method of and means employed
for fixing and locking screws in position and is specially applicable in connec-
tion with the screws employed for holding the collars in the rails of spinning

page_text: frames, and for "grub" screws used on door handles and the like. The invention
consists in the use in combination of two screws, one of which constitutes the
holding screw, the other the locking screw which, obviates the tendency of the
first screw to become loose through vibration of the part with or on which it
works.
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the annexed drawing which
is a sectional elevation of a spindle collar fixed in its rail by the improved
locking device.
onunc
.
According to this invention I employ_two screws 1,2 of like diameter and
pitch of thread, and after one screw 2 is screwed into position and well into
the chased hole 3 provided for it, the second screw 1 is screwed into the same
hole 3, and the second screw 1 has a conical or tapered point 4 which enters the
nick or slot 5 in the first screw 2 and thereby tends to expand or open the head
of the latter and lock it in position in the hole
im
When used in connection with the collars 6 in spinning frames the end of
the first screw 2 has a round point squared or flattened at the end 7 and engages
with a corresponding recess or hole S in the collar 6 and thereby the latter is
held firmly in position but is allowed a limited amount of movement, in the
rail 9. "
"
.) 12
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:
The combination of a screw having a slot in its head and a second screw
having a pointed end both received in one hole as and for the purpose herein
described and substantially as illustrated by the annexed drawing.
Dated this 26th day of February 1900.
JAMES BARBOUR.
By his Agents,
Brierley & Howard, I
Penny Bank Chambers, Halifax.