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Патент USA US2130772

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Sept. 20, 1938.
J. J. MCBRIDE
2,130,772
CAR DOOR OPERATING AND LOCKING MECHANISM
Filed NOV. 20, 1935
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Sept. 20, 1938.
J. J. McBRIDF:
2,130,772
CAR DOOR OPERATING AND LOCKING MECHANISM
Filed Nov. 20, 1955
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Sept. ‘20, 1938.
J. J. MCBRIDE
2,130,772
CAR DOOR OPERATING AND LOCKING MECHANISM
Filed Nov. 20, 1935
3 Sheets-Sheet 3
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jTTORNEY
2,130,772.
Patented Sept. 20, 1938
UNITED STATES PATENT OFFICE
2,130,772
CAR DOOR- OPERATING AND LOCKING
MECHANISM
John J. McBride, Bayonne, N. J., assignor to
American Car and Foundry Company, New
York, N. Y., a corporation of New Jersey
Application November 20, 1935, Serial No. 50,704
‘ 9 Claims. (Cl. 268-44)
This invention relates to mechanisms for oper
ating and locking doors, particularly sliding
doors adapted for use on freight cars. , The
majority of prior constructions have been com
5 plicated and expensive due to the fact that sep
door. The arm is provided with a plurality of
notches 6, 8, l3 and I2, each of which may en
gage a pin l4 carried upon the upper end of the
movable fulcrum arm.
arate actuating and locking means were pro
vided. It is an object of the invention to provide
a simple, rugged and ef?cient operating and
locking mechanism wherein the number of parts
is reduced.
The fulcrum arm is
formed with a central opening l6 adapted to
'
Another object of the invention is the provi
sion of a mechanism wherein the locking member
is so formed as to permit application of a power
ful initial opening or ?nal closing force upon the
15 door.
rotatably engage a projection‘ or pivot I8 pro
vided on casting 2i] suitably secured to the car
side adjacent the door jamb and spark strip 22.
A bolt or other means 24 and washer 26 retain
the fulcrum arm in position upon the projection, 10
while weighted end 28 insures that the pin M
will always be uppermost and in a position to
be readily engaged by the operating arm notches.
The outer end of the operating arm is provided
with a handle portion 30 and a plurality of holes 15
32, through which a retaining pin 34 may be
passed. The retaining pin engages the proper set
of holes 36 in clevis 38 which is fastened to the
A further object of the invention is the provi
sion of mechanism wherein the initial opening or
?nal closing of the door may be accomplished by ‘ car structure by chain 40 and eye 42. The retain
application of the operator’s weight upona lever. ing pin to prevent loss is fastened to the chain
A still further object of the invention is the 4!! by a small chain 44 and is also provided with
provision of a mechanism which may be applied an opening to receive the usual sealing means
to a car and not project beyond the door plane.
These and other objects will be apparent to one 46.
. It is readily seen, as viewed in Fig‘. 1, that
skilled in the art from a study of the following whenever the pin 14 on the movable fulcrum arm
detailed description taken in conjunction with is to ‘the right of the vertical plane through the "
a the accompanying drawings, in which:
pivot and is in engagement with a notch of the
Figure 1 is an elevational view of the mecha
operating arm that any downward force applied
nism applied to a freight car and showing in to the handle will be vastly multiplied and will
dotted outline the position of parts‘in readiness
to apply an initial opening force to the door;
Fig. 2 is a sectional view of the mechanism
shown in Fig. 1;
Figs. 3 and. 4 are sectional views taken on
lines 3—3 and 4-4 respectively of Fig. 1;
Fig. 5 is an elevational view of the device with
the parts in position for application of a closing
force;
Fig. 6 is an elevational view similar to Fig. 1
but showing the door as slightly opened and the
mechanism in position to continue the opening
40
of the door as shown by dotted lines;
Fig. 7 is a view similar to Fig. 1 but showing a
modi?cation thereof;
Fig. 8 is a sectional view of the modi?ed form
shown in Fig. '7;
Figs. 9 and 10 are sectional views taken on lines
“.L-S and ill-40 respectively of Fig. 7;
Fig. 11 is a sectional view showing a modi?ca
tion of the securing means whereby the lock is
' 50
secured to the door, and
I
Fig. 12 is a sectional view similar to Fig. 11 but
showing a still further modi?cation.
Referring now to the drawings in detail, it is
seen that the mechanism proper is composed of
but three parts, namely, operating or locking arm
A, rocking or movable fulcrum arm B and the
?nal locking or retaining means C. In Figs. 1 to
6 inclusive the operating or locking arm is shown
as attached by eye 2 to door stile 4 in such a
manner as to be within the outer plane of the
act upon the door to cause it to open. It is also _
obvious that with the pin Hi to the left of the U
pivot that any downward force applied to the
handle will cause a closing movement of the door.
The mechanism is as can be seen essentially a
toggle with the off-center joint between the two _
arms, being made adjustable or readily movable
in order that a plurality of powerful opening im
pulses may be imparted to the door. A single
notch is provided for closing the door, since nor
mally the door will of its own momentum go _
practically closed, but if it is necessary to obtain
a plurality of closing impulses, it is only neces
sary to provide additional notches on the oper~
ating arm.
The door is readily locked in the closed posi
tion, for as seen in Fig. 1 after forcing the door
‘ closed from the position as shown in Fig. 5, it is
only necessary to retain the handle in the low
ered position by inserting the retaining pin 34
through the clevis and arm. Any door opening
tendency is absorbed by the pin M of the ful
crum arm and by the chain 40 as is obvious.
In the modi?cation shown by Figs. 7 to 10 in
clusive the operating arm is attached to the door
stile by means of bracket 50 and is provided with 55
slot 52 having notched ends 54 and 56. The arm
adjacent the slotted portion is provided with an
offset portion 58 similarly slotted to thereby form
a guideway for movable fulcrum arm Bil, the up
per end of which is providedrwith pin 62 riding
2
'
‘
2,130,772
in the slots of the arm. The lower end of the
fulcrum arm is adapted to engage the proper or
chosen notch at the outer end of a casting 64 fas
tened to the car side adjacent the door jamb. The
3. In a car door operating and locking mecha
nism, an operating member movably secured to
the door, a slot in said operating member, a mov~
casting as shown has two notches 65 and 66 for, able fulcrum arm having one end adapted to
closing the door and two notches 61 and 68 for engage the ends of said slot, a ?xed member se
cured to the car adjacent the door, notches in said
opening the door. The number of notches is, of ?xed
member adapted to be engaged by the oppo
course, purely a matter of choice as in some cases
site end of said fulcrum arm, and retaining means
more'than two may be desired.
secured to said car to lock said operating mem
10
The ?nal locking is accomplished in this modi
ber against movement.
'
?cation by means of a casting having a base
portion 10 secured to the car wall and from which
projects a suitably braced web 12 carrying at its
outer end an upwardly facing U-shaped socket
15 14 between the spaced walls of which the operat
ing bar may be positioned. Locking pin 16 is
adapted to project through openings in the spaced
walls and the operating bar, thus retaining the
bar in the lower position. The locking pin is
20 adapted to receive the usual car seal 18 and safety
chain 80.
The operation of this mechanism is very similar
to that described in connection with Figs. 1 to 6,
the main difference being that the fulcrum bar
25 may have both its points of contact shifted.
It
is plain from Fig. 'Tthat with the fulcrum bar
in the dotted positiona downwardly applied force
on the operating handle will cause opening of the
door, while with the fulcrum bar in the opposite
30 end of the slot or full line position that any down
wardly applied force tends to pull the door closed.
In this modi?cation the locking takes place direct~
1y due to the fact that the operating bar may
react directly against the retaining pin; how
35 ever this pin is relieved of part of the strain by
the fulcrum bar.
The manner in which the operating bar is se
cured to the door stile is immaterial, but that
shown in‘ Fig. 1 is the preferred type. In the
40 form shown in Fig. 11 an eye 82 is riveted to
the stile and as is easily understood it permits of
free vertical and outward or horizontal move
ment of the operating bar or handle.
The modi?cation shown in Fig. 12 varies only
45 in that a rivet 86 or other means fastens the
operating bar to the stile.
The rivet will, of
course, permit vertical movement of the bar and
in order to permit any necessary horizontal or
outward movement of the bar the hole is en
50 larged as at 88 and clearance is provided between
the rivet head and bar.
It is, of course, obvious to one skilled in the art
that various modi?cations and improvements of
the device may be made and such modi?cations
55 and improvements are contemplated as fall with
in the scope of the following claims which de?ne
that which applicant considers as new.
What is claimed is:
'
1. In a car door operating mechanism, an op
60 erating member constituting a lever movably se
cured to the door, an independent movable ful
crum adapted to engage a portion of said operat
ing member, a ?xed member secured to the car
adjacent the door,rand provided with a plurality
65 of spaced portions adapted to engage said mov
able fulcrum to vary the throw of the lever when
pressure is exerted on its free end.
"
2. In a car door operating mechanism, an op
erating member movably secured to the door, a
70 slot in'said operating member, a movable fulcrum
arm having one end adapted to engage the ends
of said slot, a ?xed member secured to the car
adjacent the door, and notches in said ?xed
member adapted to be engaged by the opposite
75 end of said fulcrum arm.
4. In a car door operating and locking mecha
1O
nism, an operating member movably secured to
the door, a slot in said operating member, a mov
able fulcrum arm having one end adapted to en
gage the ends of said slot, a ?xed member secured 15
to the car adjacent the door, and a plurality of
notches in said ?xed member adapted to be se
lectively engaged by the other end of said fulcrum
arm.
5. In a car door operating and locking mecha 20
nism, an operating member constituting a lever
movably secured to the door, a slot in said operat
ing member, a movable fulcrum arm having one
end adapted to engage the ends of said slot, a
?xed member secured to the car adjacent the 25
door, and a plurality of oppositely disposed
notches in said ?xed member to be selectively en
gaged by the other end of said fulcrum whereby
the throw of the operating member matr be
changed, upon application of pressure to its free 30
end.
>
6. In a car door operating and locking mecha
nism, an operating member constituting a lever
movably secured to the door, a slot in said oper
ating member, a movable fulcrum arm having
one end adapted to engage the ends of said slot,
a ?xed member secured to the car adjacent the
door, a plurality of oppositely disposed notches
in said ?xed member to be selectively engaged
by the other end of said fulcrum whereby the
throw of the operating member may be changed, 40
and retaining means secured to said car to lock
the operating member against movement.
7. In a car door operating and locking mecha
nism, a pair of members detachably engaged when
the door is in closed position, one of said mem 45
bers comprising a lever pivotally connected to the
door and formed with a plurality of recesses and
the other member comprising a weighted arm
pivotally secured to a stationary car part and
formed with a fulcrum adapted to engage either
of said recesses to vary the throw of the lever
when pressure is exerted on its free end.
8. In a car door operating and locking mecha
nism, an operating member constituting a lever
movably secured to the door, a slot in said oper
ating member, a movable fulcrum member sus
pended at one end between the walls de?ning said
slot and being shiftable therein, a ?xed member
secured to the car adjacent the door, and a plu
60
rality of notches in said ?xed member to be se
lectively engaged by the other end of said fulcrum
whereby the throw of the lever may be varied
upon application of pressure to its free end.
9. In combination with the relatively stationary 65
member and a sliding door member, an operating
arm pivotally connected to one of said members,
a fulcrum member arranged for pivotal engage
ment with the other member and being shiftable
to opposite sides of its pivotal point for engage 70
ment with spaced portions of said arm for vary
ing the throw of the lever when pressure is ex
erted on its free end and fastening means for
said arm.
JOHN J. MCBRIDE.
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