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Патент USA US2403415

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July 2, 1946.
G. VAN DAAM
HEATING GÚNs'
Filed oct. 1, 1945'
2,403,415
2 sheets-sheet 1
July 2, 1946.
G, VAN DAAM
`
HEATING
2,403,415
GUNS
l
Filed oct. 1, 1945
25
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2 sheets-sheet 2
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Patented July 2, 1946
UNITED
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Y
STATES - PATENT
2,403,415
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HEATING GUNS.; y
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~ OFFICE .
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Gerrit Van Daam, Buffalo, N. Y.
Application October 1, 1943, vSerial No. 504,597
4 claims.
(ci. 21e-_19) '
l
2
This invention relates to heating guns.
sistance element, showing depressions in the face `
The object is to provide such means equally
thereof.
.
adapted for mounting the heater either on the
Fig. 5 is a section on the line 5_5 of Fig. 4,
right hand or left hand side of the gun.
on an enlarged scale.
It is common practice to manufacture gun 5
Fig. 6 is a Similar v_iew of the side heater ele
heaters especially for the right hand or the left
ment Without deDreSSlOnS
hand mounting.
and expensive.
This practice is inconvenient
It is therefore the object of the
Fig. 'i is a side elevation 0f theV housing for '
the main resistance. l
v
‘
present invention to provide means equally apFigs. 8 and 9 are vleWS in perspectlve of com
piioabie for right hand or left hand mounting. 10 plementary parts 0f the housing for the 'side
Such a device is especially useful with Aircraft
heater element.
guns or the like. By the use of this device such
Figs- 10 andil are diagrams'of Suitable wiring.Y
heaters are readily changeable from one type to
Similar numerals refer v t0 Similar Darts
the other, without substantial expense or delay.
thrOUghOut the Several vieWS.
'
By the use of my improved device the heater 15
Referring to Fig. 1:
l
assembly can be used on either the right hand
The frame 2| iS provided fOr Supporting and
or left hand side of the gun without interferadjusting the heating element 22, Which iS e11
ing with any attachments which may be mounted
closed in the housing or box-like formation 23.
on the guns.
This heating element is preferably an electric
Another object of my invention is to provide 2O resistance which may be in the'nature of a fabri-‘
an efficient heater for guns where the heaters
cated sheet-
~
'
The face or front wall 24 of the housing is
alone are in thermal contact with the gun, thus
provided with concavo-convex formations 25 and
assuring the efficient heat transfer to the gun
Without conducting some heat to the frame. This 25 26, which appear on the inner side of said Wall Y
as convex projections. These formations are ar
is accomplished by the use of insulating bodies
ranged diagonally in said face 24.
and means of supporting springs between the
Only one formation is engaged for right-hand
heater and the frame.
mounting to keep the heater assembly in proper
location.
For left-hand mounting, the assembly
a heater which can be removed or replaced with- 30
naturally is turned around, thus engaging the
out the loss of the main part of the assembly.
other formation, leaving, in either case, one for
By sealing the seams of the unit or heater
Another object of my invention is to provide
housing I make them water-proof to avoid any
.
Vapor or water seepmg through the seams.
Another Object (.’f my inverttion is to provide_a' 35
mation not in use.
All th
.
.
.
e guns of this type, especially machme
guns, have only one projection
The fabricated resistance sheet 22, which forms
heater readlly adiustable, with means to avold
with its housing’ the main heater’ is provided
any ëliciing effec? which may take place when the
with similar concave-convex formations 25 and
gun 1s in operation.
_
26, and are pressed between the registering for
The Invent/10H also Compï'lses means for PTO'
mations on the plate 24 and the surface of the
tecting the resistance Wire against abrasions and 40 gun body 21 when the same @gisten The pres
grounds, by insulating the bare resistance wire
Sure is under a stiff Spring 23, so that an ex
with fibreglass yarn before they are fabricated
tremely effective pressure contact is maintained
into a unitThe invention comprises such means and also
between said distortions when the same are in
registel;
other improvements in connection with such in- 45
When the proper depression `in the face 24
vention, as will be described.
of the heater is brought into register with the
Referring to the drawings, which illustrate
projection 39 on the gun surface, the desired
merely by way of example, suitable means for
result is achieved.
effecting my invention;
The preferred insulation between the heater
Fig. 1 is a view in perspective of the device 50 and the gun surface, is mica 40 or similar mate
embodying my invention; said device being shown
rial, which provides an effective electrical insu
as standing on end.
lation while having effective heat conductivity.
Fig. 2 is a section on the line 2-2 of Fig. 1.
The preferred insulation between the heater and
Fig. 3 is a section on the line 3_3 of Fig. 1.
the frame, should be highly eiîective to both heat
Fig. 4 is a perspective view of a fabricated re- 55 and electrical insulation as above indicated.`
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2,403,415
3
As stated, 2| indicates the frame for carrying
the heater 22 to the surface of the gun body
2]’. The frame 2| is provided with side walls or
fianges having suitable spring clips 28 to hold
the parts in proper relative and co-acting re
lationship, and especially insuring effective con
tact between the heater and the gun surfaces.
The side heater 29 is provided with a support
ing sleeve 30, slidably mounted on the rod 3|,
secured to the frame 2l. This arrangement is
for purposes of adjustment relatively to either
right or left-hand position of the main heater,
4
provided with tWo spaced apart concavo forma
tions each of which is adapted for selective reg
istration with said convex formation, and re
silient means for insuring effective contact be
tween the heater and the gun.
2. A heating device for guns, comprising an
electrical resistance, a housing enclosing the same,
a frame for securing the heater to the gun for
right-hand or left-hand position, the gun hav
ing a contact surface provided with a convex for
mation, the housing having a contact face pro
vided with two spaced apart concavo formations
each of which is adapted for selective registra
as herein described.
tion with said convex formation, and resilient
The side heater formation 29 comprises a re
ceptacle 32 for receiving the heating element, 15 means for disengageably securing the housing to
the frame.
and a cover 33 for enclosing the same. This
3. A heating device for guns, comprising an
cover or closure 33 has a fitting engagement
electrical resistance, a housing enclosing the
with the receptacle. A resilient strip 34 is se
same, a frame for securing the heater to the gun
cured to the receptacle body having a bend 35
at its free end engaging a guide 33, thus provid 20 for right-hand or left-hand position, the gun
having a contact surface provided with a convex
ing an additional guide and support for the side
formation, the housing having a contact face
heater. A leaf-spring 31 between the two ele
provided with two spaced apart concavo forma
ments 32 and 33, serves to maintain effective
tions each of Which is adapted for selective reg
pressure upon the surface of the gun.
The preferred insulation for the resistance 25 istration with said convex formation, and resil
ient means for disengageably securing the frame
comprises mica between the heater 22 and the
to the gun in either right-hand or left-hand
gun surface, and glass wool or the like, as at 4l,
position.
sho-uld be used between the heater and the frame.
4. A heating device for guns, comprising an
The main heater 22 and the side wall heater
23 are provided with the spring 31 and spring 30 electrical resistance, a housing enclosing the
same, a frame for securing the heater to the gun
38 for securing even resilientl pressures between
for right-hand or left-hand position, the gun hav
said heaters and the surfaces of the gun.
ing a contact surface provided with a convex for
Figs. 10 and 11 show preferred schemes for
mation, the housing having a contact face pro
the wiring of the heating elements.
35 vided with two spaced apart concavo formations
What I claim is:
each of which is adapted for selective registra
LA heating device for guns, comprising an
tion with said convex formation, and a side heat
electrical resistance, a housing enclosing the
er pivotally secured to the frame and provided
same, a frame for securing the heater to the gun
with resilient means for securing effective con
for right-hand or left-hand position, the gun
having a Contact surface provided with a, convex 40 tact with a side surf ace of the gun.
GERRIT VAN DAAM.
formation, the housing having a contact face
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