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Патент USA US2123985

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July .19, 1938'.
F. A. BALLQU, JR
SAFETY CATCH
2,123,985 ‘
.
Filed Dec. 6, 1935
‘
INVENTO
.
A TTORNEYS.
I
Patented July 19, 1938
2,123,985
UNITED STATES
PATENT
OFFICE v
2,123,985
SAFETY CATCH
Frederick A. Ballou, Jr., Providence, R. 1., as
signor to B. A. Ballou & 00., Inc., a corpora
tion of Rhode Island
Application December 6, 1935, Serial No. 53,176
2 Claims.
This invention relates to a safety catch, and
has for one of its objects the provision of a catch
which may be more easily operated by the ?nger
of the user.
'
(C1. 24—157)
surface generally parallel to the front surface
and spaced therefrom with a generally circular
rotor member pivotally supported above the base
and having an edge swingable close to the said
Another object of the invention is the provi
second surface in which the ends of said arc are I
sion of a catch which may be rolled around by
the ?esh of the ?nger instead of by means of
the ?nger nail of the user.
joined by an edge of a shorter radial extent from
said pivot axis than the remainder of the edge
whereby a certain relative position of said mem
bers will provide a substantial space between the
nearest portion of the rotor member and the said <
Another object of the invention is the provision
of means by which the rotor member of the catch
will be less likely than heretofore to be held by
solder which is used to attach the body portion
of the catch to a support.
Another object of the invention is the provi
sion of a rotor member which will be of less
material without weakening the same at any vital
points, whereby a saving of precious metal may
be had.
With these and other objects in view, the in
vention consists of certain novel features of con
struction, as will be more fully described, and
particularly pointed out in the appended claims.
In the accompanying drawing:
Fig. 1 is an end view of the safety catch with
the rotor member in partially closed position;
Fig. 2 is a sectional view through the rotor
member looking at the catch in the same direc
tion as shown in Fig. 1;
Fig. 3 is a section on line 3-3 of Fig. 2; and
Fig. 4 is an end view of the rotor member with
30
a slightly modi?ed ?nger piece engaging portion.
It is customary when purchasing safety catches
for the purchaser to specify the amount of clear
ance which he desired between the solder surface
35 and the point of the rotor or part which rotates in
the device which is nearest to the soldered sur
face at the time of soldering. It is well-known
in the art that in the practical construction and
operation of safety catches it is desirable to have
40 the pin stem as close to the solder surface as is
practical, and yet the neck portion between the
base and the ears must be long enough so as to
space the nearest point of the rotor a distance
from the soldered surface suf?cient so that the
45 solder will not run into it. Heretofore, when
attaching the previous catches to various articles,
if the solder was found to run up into the device
so as to cause the rotor to become attached and
prevent its rotation, the catches would be re
50 jected by the trade and returned in exchange for
those having greater clearance; and in order to
obviate such empirical practice, I have found it
to be of advantage to provide a catch member
having a base presenting a surface for attach
55 ment to an article by means of solder, and another
second surface so that any ?lm of solder over the
second surface will not be elevated suf?ciently to
obstruct the pivotal relation of said members or
cause the rotor to become attached to prevent its
rotary action; and I have also provided a more {1.5
closely coupled catch structure to present a
shorter neck than is found in the previous catches
of which I am aware yet may be soldered‘with
out obstructing the rotation of the rotor, thus
effecting a material saving in precious metal 121)
where such catches are formed of solid gold; and
the following is a more detailed description of the
present embodiment of this invention, illustrating
the preferred means by which these disadvanta
geous results may be accomplished:
25
With reference to the drawing, [0 designates
the supporting structure to which the safety
catch is attached, such for instance as a bar pin
or some like structure. The base of the safety
catch I l is attached to the support Ill by solder I2.
The body portion of the safety catch comprises
the base I’! with upstanding ears l3 and I4 usu
ally integral with the base and folded therefrom,
and there exists between the ears a portion form
ing the upper surface l5 of the base H. A rotor
member [6 is mounted in bearings in the ears l3
and M by reason of its trunnion portions I‘! and
18 extending into recesses in these cars l9 and 20,
while the main disk portion 2| of the rotor oper
ates in the space 32 between the ears [3 and I4
and comes in close proximity to the surface i5
on the top of the base. A handle portion 23
extends upwardly from the disk portion 2| and
is provided on its engaging surface with a plu
rality of projections 24 as shown in Fig. 2 or the
surface of this handle may consist of a plurality
of projections 25 and 26 as shown in Fig. 4 with
deeper inwardly extending recesses between them,
the handle portion being such that the plurality
of projections present an extended frictional en
gaging surface to the ?esh of the ?nger so that
the ?nger may be pressed more or less ?atly
against this handle portion and then by move
ment in either direction will serve to roll the
35
45
50
55
2
2,123,985
‘rotor member of the safety catch in its bearings
to or from closed or open position.
The handle in projecting from the disk por
tion 2| presents abutment surfaces 29 which will
alternately engage the edge of the base in the
different positions of said disk to limit the move
ment of the rotor member so that the slot in
the rotor will register with the slots in the ears
in one certain position and will limit them to a
10 position out of such alignment or a locking po
sition when rotated to its extreme limit in the
opposite direction.
When soldering the safety catch in position it
is usual that the handle or turning portion such
15 as 23 be positioned vertically upwardly such as
shown in the ?gures of the drawing so that this
handle portion will be spaced from the base
and there will be less likelihood of solder flux,
causing an adherence of solder between the fin
ger portion and the base should the two be in
contact; and in order to further avoid any likeli
hood of solder tacking the lower portion of the
‘rotor to the base by reason of some stray solder
?ux engaging the same which on melting quickly
25 flows between two closely adjacent portions
which are just out of contact, I cut off a por
tion of the rotor member as, at 30 or so reduce
the dimension of the stock as to provide a ?at
surface opposite the handle 23. Thus, when this
30 handle is in the position illustrated in the draw
ing, this ?at surface will provide a wide clear
ance space between the rotor member and the
base and prevent the flow of solder ?ux and
solder following the same into the joint to tack
135 the two together as sometimes accidentally
happens when no such large space is provided;
and in this manner I am enabled to obtain less
rejects after soldering and yet a catch which is
very easily operated without the necessity of
40 de?nite engagement by the ?nger nail.
The foregoing description is directed solely
towards the construction illustrated, but I de
sire it to be understood that I reserve the privi
lege of resorting to all the mechanical changes
to which the device is susceptible, the invention
being de?ned and limited only by the terms of
the appended claims.
I claim:
‘
1. In a safety catch, a member having a base
presenting a surface for attachment to an article
by means of solder and presenting, a second sur
face generally parallel to the front surface and
spaced therefrom, a support for a rotor member 10
extending from said base, a generally circular
rotor member pivotally mounted on said support
and having an arcuate edge along the major por
tion of its periphery with the pivot axis of the
rotor as its center, said edge being swingable
close to said second surface and said member
having the ends of said arc joined by an edge of
a shorter radial extent from said pivot axis than
the said remainder of the edge whereby a certain
relative position of said members provides a sub 20
stantial space between the nearest portionof the
rotor member and said second surface.
2. In combination with an ornamental sup
port, a safety catch, a member having a base
with a surface soldered to said article and pre 25
senting a second surface'generally parallel to
the ?rst surface and spaced therefrom, a sup
port for a rotor member extending from said
base, a generally circular rotor member pivot
ally mounted on said support and having an 30
arcuate edge along the major portion of its pe
riphery with the pivot axis of the rotor as its
center, said edge being swingable close to said
second surface and said member having the ends
of said arc joined by an edge of a shorter radial
extent from said pivot axis than the remainder
of the edge whereby a certain relative position
of said members provides a substantial space be
tween the nearest portion of the rotor member
and said second surface, and a film of solder 10
over the second surface insufficient to obstruct
the pivotal working relation of said members.
FREDERICK A. BALLOU. JR.
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